Amphastar Pharmaceuticals Inc NASDAQ:AMPH Historical Prices

Below are the 2438 trading days of historical prices for AMPH.

# Exchange Symbol Date Open High Low Close
2438 NASDAQ AMPH Fri, Mar 1, 2024 47.08 47.08 45.17 46.22
2437 NASDAQ AMPH Thu, Feb 29, 2024 49.81 50.35 44.58 46.57
2436 NASDAQ AMPH Wed, Feb 28, 2024 55.95 55.95 53.96 54.74
2435 NASDAQ AMPH Tue, Feb 27, 2024 55.85 56.38 55.06 55.44
2434 NASDAQ AMPH Mon, Feb 26, 2024 53.41 55.69 53.39 55.09
2433 NASDAQ AMPH Fri, Feb 23, 2024 52.30 53.55 51.91 53.41
2432 NASDAQ AMPH Thu, Feb 22, 2024 51.34 52.38 51.26 51.91
2431 NASDAQ AMPH Wed, Feb 21, 2024 52.16 52.82 51.08 51.25
2430 NASDAQ AMPH Tue, Feb 20, 2024 53.59 53.59 51.70 52.45
2429 NASDAQ AMPH Fri, Feb 16, 2024 55.40 55.58 53.68 54.06
2428 NASDAQ AMPH Thu, Feb 15, 2024 55.00 55.61 54.04 55.51
2427 NASDAQ AMPH Wed, Feb 14, 2024 55.24 55.88 54.80 54.93
2426 NASDAQ AMPH Tue, Feb 13, 2024 54.86 55.85 54.27 54.75
2425 NASDAQ AMPH Mon, Feb 12, 2024 55.91 56.45 55.38 56.02
2424 NASDAQ AMPH Fri, Feb 9, 2024 55.07 56.12 54.70 55.61
2423 NASDAQ AMPH Thu, Feb 8, 2024 53.09 54.72 52.79 54.60
2422 NASDAQ AMPH Wed, Feb 7, 2024 52.40 53.45 52.13 52.96
2421 NASDAQ AMPH Tue, Feb 6, 2024 52.24 52.72 51.26 52.49
2420 NASDAQ AMPH Mon, Feb 5, 2024 52.47 53.04 52.06 52.35
2419 NASDAQ AMPH Fri, Feb 2, 2024 53.10 53.41 52.25 52.80
2418 NASDAQ AMPH Thu, Feb 1, 2024 53.56 53.68 52.01 53.49
2417 NASDAQ AMPH Wed, Jan 31, 2024 55.14 55.28 53.32 53.36
2416 NASDAQ AMPH Tue, Jan 30, 2024 55.40 55.51 54.16 54.94
2415 NASDAQ AMPH Mon, Jan 29, 2024 54.49 55.56 53.82 55.39
2414 NASDAQ AMPH Fri, Jan 26, 2024 54.09 54.60 53.40 53.88
2413 NASDAQ AMPH Thu, Jan 25, 2024 55.59 55.86 52.93 53.24
2412 NASDAQ AMPH Wed, Jan 24, 2024 56.02 56.13 55.00 55.22
2411 NASDAQ AMPH Tue, Jan 23, 2024 56.19 56.77 55.25 55.45
2410 NASDAQ AMPH Mon, Jan 22, 2024 55.52 56.57 55.23 55.92
2409 NASDAQ AMPH Fri, Jan 19, 2024 56.70 56.88 54.11 55.04
2408 NASDAQ AMPH Thu, Jan 18, 2024 56.44 56.45 55.30 56.43
2407 NASDAQ AMPH Wed, Jan 17, 2024 55.02 56.37 54.92 56.14
2406 NASDAQ AMPH Tue, Jan 16, 2024 54.00 55.77 53.81 55.50
2405 NASDAQ AMPH Fri, Jan 12, 2024 54.28 54.80 53.53 54.21
2404 NASDAQ AMPH Thu, Jan 11, 2024 54.60 54.64 52.33 54.03
2403 NASDAQ AMPH Wed, Jan 10, 2024 56.97 57.25 53.58 54.82
2402 NASDAQ AMPH Tue, Jan 9, 2024 58.64 58.64 56.07 56.82
2401 NASDAQ AMPH Mon, Jan 8, 2024 63.31 63.96 56.42 59.45
2400 NASDAQ AMPH Fri, Jan 5, 2024 63.45 65.92 62.45 62.74
2399 NASDAQ AMPH Thu, Jan 4, 2024 61.66 64.42 61.50 63.45
2398 NASDAQ AMPH Wed, Jan 3, 2024 62.26 63.15 60.86 61.04
2397 NASDAQ AMPH Tue, Jan 2, 2024 61.78 62.41 60.08 62.29
2396 NASDAQ AMPH Fri, Dec 29, 2023 62.20 62.87 60.85 61.85
2395 NASDAQ AMPH Thu, Dec 28, 2023 63.10 63.15 62.10 62.17
2394 NASDAQ AMPH Wed, Dec 27, 2023 62.96 63.67 61.62 62.93
2393 NASDAQ AMPH Tue, Dec 26, 2023 61.00 63.50 61.00 62.51
2392 NASDAQ AMPH Fri, Dec 22, 2023 60.42 61.47 59.94 60.92
2391 NASDAQ AMPH Thu, Dec 21, 2023 59.35 59.97 58.62 59.96
2390 NASDAQ AMPH Wed, Dec 20, 2023 60.54 60.72 58.53 58.53
2389 NASDAQ AMPH Tue, Dec 19, 2023 58.25 60.49 58.24 60.46
2388 NASDAQ AMPH Mon, Dec 18, 2023 57.33 58.10 56.68 58.06
2387 NASDAQ AMPH Fri, Dec 15, 2023 58.39 58.70 54.06 56.60
2386 NASDAQ AMPH Thu, Dec 14, 2023 62.50 62.72 57.24 58.16
2385 NASDAQ AMPH Wed, Dec 13, 2023 59.14 62.15 58.64 61.73
2384 NASDAQ AMPH Tue, Dec 12, 2023 57.10 58.79 56.20 58.64
2383 NASDAQ AMPH Mon, Dec 11, 2023 57.05 58.31 56.60 57.08
2382 NASDAQ AMPH Fri, Dec 8, 2023 57.09 57.24 56.10 56.77
2381 NASDAQ AMPH Thu, Dec 7, 2023 57.94 58.36 56.06 57.09
2380 NASDAQ AMPH Wed, Dec 6, 2023 58.25 59.94 58.13 58.25
2379 NASDAQ AMPH Tue, Dec 5, 2023 59.81 59.93 57.45 58.22
2378 NASDAQ AMPH Mon, Dec 4, 2023 58.02 61.20 58.00 59.92
2377 NASDAQ AMPH Fri, Dec 1, 2023 56.89 58.58 56.12 57.92
2376 NASDAQ AMPH Thu, Nov 30, 2023 56.11 57.92 56.00 56.32
2375 NASDAQ AMPH Wed, Nov 29, 2023 54.81 56.27 54.43 55.74
2374 NASDAQ AMPH Tue, Nov 28, 2023 56.53 56.61 54.38 54.41
2373 NASDAQ AMPH Mon, Nov 27, 2023 56.94 57.79 55.64 56.59
2372 NASDAQ AMPH Fri, Nov 24, 2023 56.07 57.20 55.52 56.87
2371 NASDAQ AMPH Wed, Nov 22, 2023 57.23 57.63 55.78 56.05
2370 NASDAQ AMPH Tue, Nov 21, 2023 56.89 58.35 56.49 56.65
2369 NASDAQ AMPH Mon, Nov 20, 2023 56.35 56.79 55.14 56.59
2368 NASDAQ AMPH Fri, Nov 17, 2023 56.09 56.85 55.51 55.85
2367 NASDAQ AMPH Thu, Nov 16, 2023 57.52 57.65 55.40 56.17
2366 NASDAQ AMPH Wed, Nov 15, 2023 56.81 58.13 55.34 57.52
2365 NASDAQ AMPH Tue, Nov 14, 2023 54.53 56.92 54.16 56.31
2364 NASDAQ AMPH Mon, Nov 13, 2023 52.87 54.00 51.09 53.55
2363 NASDAQ AMPH Fri, Nov 10, 2023 52.00 53.12 50.48 52.56
2362 NASDAQ AMPH Thu, Nov 9, 2023 48.01 52.73 47.13 52.41
2361 NASDAQ AMPH Wed, Nov 8, 2023 46.35 46.66 44.43 45.42
2360 NASDAQ AMPH Tue, Nov 7, 2023 46.89 47.34 45.99 46.01
2359 NASDAQ AMPH Mon, Nov 6, 2023 46.89 47.79 46.56 46.83
2358 NASDAQ AMPH Fri, Nov 3, 2023 46.06 47.09 46.06 46.59
2357 NASDAQ AMPH Thu, Nov 2, 2023 45.75 46.08 45.06 45.45
2356 NASDAQ AMPH Wed, Nov 1, 2023 45.21 45.75 44.97 45.44
2355 NASDAQ AMPH Tue, Oct 31, 2023 45.45 45.81 45.22 45.27
2354 NASDAQ AMPH Mon, Oct 30, 2023 45.30 45.50 44.53 45.18
2353 NASDAQ AMPH Fri, Oct 27, 2023 44.80 45.50 44.52 44.64
2352 NASDAQ AMPH Thu, Oct 26, 2023 45.14 45.56 44.55 44.94
2351 NASDAQ AMPH Wed, Oct 25, 2023 45.28 45.50 44.59 45.06
2350 NASDAQ AMPH Tue, Oct 24, 2023 45.21 46.08 45.02 45.35
2349 NASDAQ AMPH Mon, Oct 23, 2023 44.49 45.40 44.23 44.72
2348 NASDAQ AMPH Fri, Oct 20, 2023 44.97 45.39 44.34 44.49
2347 NASDAQ AMPH Thu, Oct 19, 2023 47.05 47.70 44.75 44.83
2346 NASDAQ AMPH Wed, Oct 18, 2023 47.59 48.17 46.80 47.20
2345 NASDAQ AMPH Tue, Oct 17, 2023 46.29 48.43 46.29 48.04
2344 NASDAQ AMPH Mon, Oct 16, 2023 45.86 46.50 45.74 46.47
2343 NASDAQ AMPH Fri, Oct 13, 2023 46.68 46.68 45.20 45.76
2342 NASDAQ AMPH Thu, Oct 12, 2023 48.50 48.50 46.03 46.16
2341 NASDAQ AMPH Wed, Oct 11, 2023 48.10 48.47 47.55 48.46
2340 NASDAQ AMPH Tue, Oct 10, 2023 47.78 48.50 47.61 47.96
2339 NASDAQ AMPH Mon, Oct 9, 2023 46.80 48.00 46.56 47.55
2338 NASDAQ AMPH Fri, Oct 6, 2023 46.36 47.55 46.05 47.19
2337 NASDAQ AMPH Thu, Oct 5, 2023 45.93 46.87 45.83 46.57
2336 NASDAQ AMPH Wed, Oct 4, 2023 44.89 46.21 44.08 45.89
2335 NASDAQ AMPH Tue, Oct 3, 2023 45.42 45.74 43.79 44.87
2334 NASDAQ AMPH Mon, Oct 2, 2023 46.10 46.36 45.27 45.74
2333 NASDAQ AMPH Fri, Sep 29, 2023 47.53 47.70 45.68 45.99
2332 NASDAQ AMPH Thu, Sep 28, 2023 46.61 48.06 46.56 47.30
2331 NASDAQ AMPH Wed, Sep 27, 2023 45.80 46.54 45.70 46.50
2330 NASDAQ AMPH Tue, Sep 26, 2023 45.74 46.35 45.15 45.51
2329 NASDAQ AMPH Mon, Sep 25, 2023 45.48 46.11 45.01 45.88
2328 NASDAQ AMPH Fri, Sep 22, 2023 46.12 46.13 45.27 45.51
2327 NASDAQ AMPH Thu, Sep 21, 2023 45.71 46.11 44.86 45.66
2326 NASDAQ AMPH Wed, Sep 20, 2023 46.44 47.54 46.14 46.20
2325 NASDAQ AMPH Tue, Sep 19, 2023 46.25 46.40 45.46 46.04
2324 NASDAQ AMPH Mon, Sep 18, 2023 45.88 47.00 45.88 46.23
2323 NASDAQ AMPH Fri, Sep 15, 2023 47.00 47.00 45.10 45.77
2322 NASDAQ AMPH Thu, Sep 14, 2023 46.68 47.22 46.14 47.07
2321 NASDAQ AMPH Wed, Sep 13, 2023 46.70 48.40 46.16 46.30
2320 NASDAQ AMPH Tue, Sep 12, 2023 47.47 48.12 45.37 46.64
2319 NASDAQ AMPH Mon, Sep 11, 2023 49.00 49.00 49.00 49.00
2318 NASDAQ AMPH Fri, Sep 8, 2023 51.36 51.68 49.80 50.01
2317 NASDAQ AMPH Thu, Sep 7, 2023 52.20 52.50 51.16 51.24
2316 NASDAQ AMPH Wed, Sep 6, 2023 51.84 52.33 51.20 52.03
2315 NASDAQ AMPH Tue, Sep 5, 2023 54.40 54.40 50.70 51.51
2314 NASDAQ AMPH Fri, Sep 1, 2023 53.71 55.44 53.71 54.53
2313 NASDAQ AMPH Thu, Aug 31, 2023 54.36 54.55 53.29 53.31
2312 NASDAQ AMPH Wed, Aug 30, 2023 53.40 55.44 53.35 54.36
2311 NASDAQ AMPH Tue, Aug 29, 2023 53.23 53.93 52.79 53.63
2310 NASDAQ AMPH Mon, Aug 28, 2023 53.19 53.81 52.82 52.95
2309 NASDAQ AMPH Fri, Aug 25, 2023 53.39 54.10 52.90 53.00
2308 NASDAQ AMPH Thu, Aug 24, 2023 54.44 54.84 53.46 53.54
2307 NASDAQ AMPH Wed, Aug 23, 2023 54.00 54.93 53.11 54.51
2306 NASDAQ AMPH Tue, Aug 22, 2023 53.63 53.85 51.93 53.49
2305 NASDAQ AMPH Mon, Aug 21, 2023 52.76 53.93 52.71 53.48
2304 NASDAQ AMPH Fri, Aug 18, 2023 52.59 53.49 51.92 52.87
2303 NASDAQ AMPH Thu, Aug 17, 2023 55.64 56.05 52.93 53.01
2302 NASDAQ AMPH Wed, Aug 16, 2023 57.26 59.52 55.98 56.05
2301 NASDAQ AMPH Tue, Aug 15, 2023 54.34 57.64 54.14 57.25
2300 NASDAQ AMPH Mon, Aug 14, 2023 54.64 54.82 53.45 54.07
2299 NASDAQ AMPH Fri, Aug 11, 2023 53.41 55.41 51.43 54.69
2298 NASDAQ AMPH Thu, Aug 10, 2023 62.29 62.47 53.26 53.40
2297 NASDAQ AMPH Wed, Aug 9, 2023 64.70 67.66 61.32 62.21
2296 NASDAQ AMPH Tue, Aug 8, 2023 63.31 65.53 63.00 65.00
2295 NASDAQ AMPH Mon, Aug 7, 2023 62.71 63.28 62.05 63.08
2294 NASDAQ AMPH Fri, Aug 4, 2023 62.95 63.64 62.52 62.81
2293 NASDAQ AMPH Thu, Aug 3, 2023 61.75 63.39 61.62 63.08
2292 NASDAQ AMPH Wed, Aug 2, 2023 60.29 62.96 60.29 61.69
2291 NASDAQ AMPH Tue, Aug 1, 2023 60.98 60.98 60.16 60.64
2290 NASDAQ AMPH Mon, Jul 31, 2023 61.00 61.01 60.08 60.69
2289 NASDAQ AMPH Fri, Jul 28, 2023 61.31 61.44 60.64 60.83
2288 NASDAQ AMPH Thu, Jul 27, 2023 61.99 61.99 60.34 60.61
2287 NASDAQ AMPH Wed, Jul 26, 2023 62.11 62.13 61.12 61.38
2286 NASDAQ AMPH Tue, Jul 25, 2023 61.61 62.34 61.07 61.65
2285 NASDAQ AMPH Mon, Jul 24, 2023 61.77 62.46 60.37 60.68
2284 NASDAQ AMPH Fri, Jul 21, 2023 63.34 63.60 61.08 61.62
2283 NASDAQ AMPH Thu, Jul 20, 2023 62.72 63.41 61.65 63.25
2282 NASDAQ AMPH Wed, Jul 19, 2023 61.59 63.72 61.59 62.33
2281 NASDAQ AMPH Tue, Jul 18, 2023 57.80 63.17 57.71 61.07
2280 NASDAQ AMPH Mon, Jul 17, 2023 55.78 56.95 55.58 56.69
2279 NASDAQ AMPH Fri, Jul 14, 2023 55.83 57.26 55.52 55.87
2278 NASDAQ AMPH Thu, Jul 13, 2023 55.30 56.00 54.73 55.28
2277 NASDAQ AMPH Wed, Jul 12, 2023 55.38 55.61 54.66 54.89
2276 NASDAQ AMPH Tue, Jul 11, 2023 56.94 57.28 54.53 55.07
2275 NASDAQ AMPH Mon, Jul 10, 2023 55.99 57.46 55.93 56.94
2274 NASDAQ AMPH Fri, Jul 7, 2023 57.30 57.70 55.81 55.92
2273 NASDAQ AMPH Thu, Jul 6, 2023 57.40 58.19 56.42 57.18
2272 NASDAQ AMPH Wed, Jul 5, 2023 57.76 58.35 57.11 57.70
2271 NASDAQ AMPH Mon, Jul 3, 2023 58.75 58.80 57.11 57.63
2270 NASDAQ AMPH Fri, Jun 30, 2023 56.19 57.92 56.10 57.47
2269 NASDAQ AMPH Thu, Jun 29, 2023 55.69 56.51 55.40 55.91
2268 NASDAQ AMPH Wed, Jun 28, 2023 56.20 56.83 55.35 55.62
2267 NASDAQ AMPH Tue, Jun 27, 2023 55.58 56.28 55.41 56.14
2266 NASDAQ AMPH Mon, Jun 26, 2023 57.16 58.39 55.06 55.30
2265 NASDAQ AMPH Fri, Jun 23, 2023 58.28 58.70 56.69 57.16
2264 NASDAQ AMPH Thu, Jun 22, 2023 56.54 58.70 56.15 58.38
2263 NASDAQ AMPH Wed, Jun 21, 2023 55.77 56.61 55.23 56.36
2262 NASDAQ AMPH Tue, Jun 20, 2023 55.50 56.17 53.32 55.79
2261 NASDAQ AMPH Fri, Jun 16, 2023 52.75 55.61 52.49 55.03
2260 NASDAQ AMPH Thu, Jun 15, 2023 48.43 52.85 48.43 52.23
2259 NASDAQ AMPH Wed, Jun 14, 2023 47.29 48.11 47.16 47.94
2258 NASDAQ AMPH Tue, Jun 13, 2023 47.47 48.39 46.92 47.10
2257 NASDAQ AMPH Mon, Jun 12, 2023 45.70 47.46 45.57 47.23
2256 NASDAQ AMPH Fri, Jun 9, 2023 45.98 46.35 45.55 45.67
2255 NASDAQ AMPH Thu, Jun 8, 2023 45.97 46.60 45.71 45.89
2254 NASDAQ AMPH Wed, Jun 7, 2023 46.08 46.29 45.44 45.91
2253 NASDAQ AMPH Tue, Jun 6, 2023 46.19 46.43 45.06 45.88
2252 NASDAQ AMPH Mon, Jun 5, 2023 46.70 46.70 45.35 46.01
2251 NASDAQ AMPH Fri, Jun 2, 2023 45.50 46.86 45.19 46.70
2250 NASDAQ AMPH Thu, Jun 1, 2023 44.63 45.49 44.55 45.14
2249 NASDAQ AMPH Wed, May 31, 2023 44.49 45.00 44.08 44.37
2248 NASDAQ AMPH Tue, May 30, 2023 44.14 45.00 43.91 44.34
2247 NASDAQ AMPH Fri, May 26, 2023 44.09 44.50 43.76 44.14
2246 NASDAQ AMPH Thu, May 25, 2023 44.10 44.12 43.09 44.05
2245 NASDAQ AMPH Wed, May 24, 2023 43.46 44.36 42.65 44.09
2244 NASDAQ AMPH Tue, May 23, 2023 44.37 45.50 43.63 43.71
2243 NASDAQ AMPH Mon, May 22, 2023 44.19 44.53 43.39 44.27
2242 NASDAQ AMPH Fri, May 19, 2023 44.11 44.54 43.58 44.16
2241 NASDAQ AMPH Thu, May 18, 2023 42.98 44.89 42.74 43.84
2240 NASDAQ AMPH Wed, May 17, 2023 43.10 43.22 42.20 42.97
2239 NASDAQ AMPH Tue, May 16, 2023 41.34 43.51 41.10 42.94
2238 NASDAQ AMPH Mon, May 15, 2023 41.62 43.67 41.40 41.76
2237 NASDAQ AMPH Fri, May 12, 2023 41.50 42.37 41.30 41.62
2236 NASDAQ AMPH Thu, May 11, 2023 41.30 42.37 40.79 41.68
2235 NASDAQ AMPH Wed, May 10, 2023 37.67 41.41 37.41 41.19
2234 NASDAQ AMPH Tue, May 9, 2023 36.47 36.97 36.06 36.44
2233 NASDAQ AMPH Mon, May 8, 2023 36.52 36.69 36.20 36.42
2232 NASDAQ AMPH Fri, May 5, 2023 36.79 36.96 36.24 36.49
2231 NASDAQ AMPH Thu, May 4, 2023 36.27 36.64 35.93 36.56
2230 NASDAQ AMPH Wed, May 3, 2023 37.14 37.73 36.18 36.25
2229 NASDAQ AMPH Tue, May 2, 2023 37.11 37.55 36.44 36.95
2228 NASDAQ AMPH Mon, May 1, 2023 36.01 38.20 35.69 37.28
2227 NASDAQ AMPH Fri, Apr 28, 2023 35.93 36.98 35.62 35.77
2226 NASDAQ AMPH Thu, Apr 27, 2023 38.24 38.36 36.26 36.38
2225 NASDAQ AMPH Wed, Apr 26, 2023 39.06 39.21 38.13 38.16
2224 NASDAQ AMPH Tue, Apr 25, 2023 40.65 41.07 39.21 39.28
2223 NASDAQ AMPH Mon, Apr 24, 2023 44.15 44.15 39.75 40.91
2222 NASDAQ AMPH Fri, Apr 21, 2023 43.14 43.95 43.14 43.84
2221 NASDAQ AMPH Thu, Apr 20, 2023 43.19 43.81 42.75 43.04
2220 NASDAQ AMPH Wed, Apr 19, 2023 42.78 43.24 42.20 43.22
2219 NASDAQ AMPH Tue, Apr 18, 2023 42.11 42.88 42.01 42.71
2218 NASDAQ AMPH Mon, Apr 17, 2023 42.28 42.35 41.26 41.96
2217 NASDAQ AMPH Fri, Apr 14, 2023 41.87 42.20 40.85 42.15
2216 NASDAQ AMPH Thu, Apr 13, 2023 39.50 42.35 39.36 41.87
2215 NASDAQ AMPH Wed, Apr 12, 2023 40.20 40.20 39.16 39.37
2214 NASDAQ AMPH Tue, Apr 11, 2023 40.10 40.83 40.00 40.05
2213 NASDAQ AMPH Mon, Apr 10, 2023 39.56 40.52 39.20 40.19
2212 NASDAQ AMPH Thu, Apr 6, 2023 39.04 39.64 38.81 39.47
2211 NASDAQ AMPH Wed, Apr 5, 2023 38.88 39.37 38.81 38.94
2210 NASDAQ AMPH Tue, Apr 4, 2023 38.18 39.00 37.31 38.74
2209 NASDAQ AMPH Mon, Apr 3, 2023 37.50 38.42 37.50 38.13
2208 NASDAQ AMPH Fri, Mar 31, 2023 37.80 38.18 37.19 37.50
2207 NASDAQ AMPH Thu, Mar 30, 2023 37.62 37.85 37.34 37.67
2206 NASDAQ AMPH Wed, Mar 29, 2023 38.00 38.04 37.50 37.55
2205 NASDAQ AMPH Tue, Mar 28, 2023 37.64 38.19 37.60 37.92
2204 NASDAQ AMPH Mon, Mar 27, 2023 37.60 38.21 37.43 37.89
2203 NASDAQ AMPH Fri, Mar 24, 2023 36.71 37.60 36.45 37.57
2202 NASDAQ AMPH Thu, Mar 23, 2023 37.08 37.38 36.66 36.91
2201 NASDAQ AMPH Wed, Mar 22, 2023 36.98 37.70 36.91 36.93
2200 NASDAQ AMPH Tue, Mar 21, 2023 37.50 37.55 36.91 36.98
2199 NASDAQ AMPH Mon, Mar 20, 2023 36.66 37.45 36.48 37.19
2198 NASDAQ AMPH Fri, Mar 17, 2023 37.40 37.40 36.03 36.29
2197 NASDAQ AMPH Thu, Mar 16, 2023 36.52 37.89 36.05 37.60
2196 NASDAQ AMPH Wed, Mar 15, 2023 36.78 36.94 36.12 36.84
2195 NASDAQ AMPH Tue, Mar 14, 2023 36.12 37.28 35.96 37.20
2194 NASDAQ AMPH Mon, Mar 13, 2023 35.41 36.48 35.41 35.71
2193 NASDAQ AMPH Fri, Mar 10, 2023 35.19 36.15 35.17 35.73
2192 NASDAQ AMPH Thu, Mar 9, 2023 35.62 35.82 35.27 35.36
2191 NASDAQ AMPH Wed, Mar 8, 2023 35.45 35.73 34.79 35.43
2190 NASDAQ AMPH Tue, Mar 7, 2023 35.29 35.93 34.78 35.30
2189 NASDAQ AMPH Mon, Mar 6, 2023 36.11 36.11 34.91 35.13
2188 NASDAQ AMPH Fri, Mar 3, 2023 37.10 37.32 36.05 36.11
2187 NASDAQ AMPH Thu, Mar 2, 2023 36.33 37.03 35.95 37.00
2186 NASDAQ AMPH Wed, Mar 1, 2023 33.70 38.22 33.61 36.56
2185 NASDAQ AMPH Tue, Feb 28, 2023 32.42 32.65 31.86 31.86
2184 NASDAQ AMPH Mon, Feb 27, 2023 32.75 33.13 32.14 32.46
2183 NASDAQ AMPH Fri, Feb 24, 2023 32.17 32.71 32.00 32.54
2182 NASDAQ AMPH Thu, Feb 23, 2023 32.08 32.52 31.97 32.33
2181 NASDAQ AMPH Wed, Feb 22, 2023 31.81 32.23 31.81 32.06
2180 NASDAQ AMPH Tue, Feb 21, 2023 32.18 32.36 31.85 31.86
2179 NASDAQ AMPH Fri, Feb 17, 2023 32.23 32.48 31.88 32.39
2178 NASDAQ AMPH Thu, Feb 16, 2023 32.46 32.46 31.95 31.98
2177 NASDAQ AMPH Wed, Feb 15, 2023 32.20 32.93 32.01 32.56
2176 NASDAQ AMPH Tue, Feb 14, 2023 32.47 32.55 31.96 32.37
2175 NASDAQ AMPH Mon, Feb 13, 2023 31.86 32.73 31.67 32.44
2174 NASDAQ AMPH Fri, Feb 10, 2023 31.18 31.84 31.07 31.77
2173 NASDAQ AMPH Thu, Feb 9, 2023 30.88 31.26 30.68 31.17
2172 NASDAQ AMPH Wed, Feb 8, 2023 30.89 31.22 30.59 30.61
2171 NASDAQ AMPH Tue, Feb 7, 2023 31.20 31.20 30.48 30.89
2170 NASDAQ AMPH Mon, Feb 6, 2023 31.21 31.48 30.76 31.30
2169 NASDAQ AMPH Fri, Feb 3, 2023 31.08 31.79 31.08 31.21
2168 NASDAQ AMPH Thu, Feb 2, 2023 30.61 31.19 30.41 31.17
2167 NASDAQ AMPH Wed, Feb 1, 2023 30.08 30.85 29.91 30.61
2166 NASDAQ AMPH Tue, Jan 31, 2023 30.35 30.75 30.24 30.26
2165 NASDAQ AMPH Mon, Jan 30, 2023 30.51 30.73 30.17 30.29
2164 NASDAQ AMPH Fri, Jan 27, 2023 31.00 31.28 30.32 30.57
2163 NASDAQ AMPH Thu, Jan 26, 2023 30.97 31.23 29.74 31.12
2162 NASDAQ AMPH Wed, Jan 25, 2023 30.75 30.93 30.50 30.91
2161 NASDAQ AMPH Tue, Jan 24, 2023 30.38 30.99 30.17 30.75
2160 NASDAQ AMPH Mon, Jan 23, 2023 28.94 30.38 28.94 30.38
2159 NASDAQ AMPH Fri, Jan 20, 2023 29.03 29.20 28.68 28.97
2158 NASDAQ AMPH Thu, Jan 19, 2023 28.68 29.03 28.47 28.89
2157 NASDAQ AMPH Wed, Jan 18, 2023 29.00 29.12 28.57 28.70
2156 NASDAQ AMPH Tue, Jan 17, 2023 28.94 29.21 28.74 28.95
2155 NASDAQ AMPH Fri, Jan 13, 2023 28.30 28.99 28.30 28.96
2154 NASDAQ AMPH Thu, Jan 12, 2023 28.27 28.54 27.99 28.31
2153 NASDAQ AMPH Wed, Jan 11, 2023 28.15 28.41 28.05 28.21
2152 NASDAQ AMPH Tue, Jan 10, 2023 28.08 28.31 28.00 28.10
2151 NASDAQ AMPH Mon, Jan 9, 2023 28.95 28.96 28.02 28.04
2150 NASDAQ AMPH Fri, Jan 6, 2023 28.35 29.25 28.31 28.85
2149 NASDAQ AMPH Thu, Jan 5, 2023 27.77 28.24 27.58 28.12
2148 NASDAQ AMPH Wed, Jan 4, 2023 28.35 28.53 27.88 27.99
2147 NASDAQ AMPH Tue, Jan 3, 2023 28.01 28.32 27.72 28.20
2146 NASDAQ AMPH Fri, Dec 30, 2022 28.20 28.28 27.70 28.02
2145 NASDAQ AMPH Thu, Dec 29, 2022 28.21 28.72 28.14 28.31
2144 NASDAQ AMPH Wed, Dec 28, 2022 28.34 28.64 28.05 28.13
2143 NASDAQ AMPH Tue, Dec 27, 2022 28.70 28.74 28.25 28.38
2142 NASDAQ AMPH Fri, Dec 23, 2022 28.47 28.76 28.36 28.67
2141 NASDAQ AMPH Thu, Dec 22, 2022 28.91 29.24 28.01 28.55
2140 NASDAQ AMPH Wed, Dec 21, 2022 28.62 29.15 28.44 28.91
2139 NASDAQ AMPH Tue, Dec 20, 2022 28.24 28.97 28.24 28.43
2138 NASDAQ AMPH Mon, Dec 19, 2022 28.72 28.92 28.22 28.24
2137 NASDAQ AMPH Fri, Dec 16, 2022 28.67 28.93 27.83 28.68
2136 NASDAQ AMPH Thu, Dec 15, 2022 29.07 29.10 28.62 28.78
2135 NASDAQ AMPH Wed, Dec 14, 2022 28.69 29.41 28.57 29.16
2134 NASDAQ AMPH Tue, Dec 13, 2022 29.11 29.39 28.65 28.78
2133 NASDAQ AMPH Mon, Dec 12, 2022 28.12 28.96 28.02 28.63
2132 NASDAQ AMPH Fri, Dec 9, 2022 29.16 29.38 28.32 28.38
2131 NASDAQ AMPH Thu, Dec 8, 2022 29.34 29.51 28.95 29.20
2130 NASDAQ AMPH Wed, Dec 7, 2022 28.88 29.92 28.88 29.50
2129 NASDAQ AMPH Tue, Dec 6, 2022 29.20 29.20 28.60 28.82
2128 NASDAQ AMPH Mon, Dec 5, 2022 30.12 30.15 29.32 29.36
2127 NASDAQ AMPH Fri, Dec 2, 2022 29.94 30.30 29.77 30.21
2126 NASDAQ AMPH Thu, Dec 1, 2022 29.64 30.50 29.64 30.02
2125 NASDAQ AMPH Wed, Nov 30, 2022 29.40 29.54 28.82 29.49
2124 NASDAQ AMPH Tue, Nov 29, 2022 29.27 29.63 29.25 29.39
2123 NASDAQ AMPH Mon, Nov 28, 2022 29.12 29.39 29.12 29.25
2122 NASDAQ AMPH Fri, Nov 25, 2022 28.70 29.45 28.67 29.18
2121 NASDAQ AMPH Wed, Nov 23, 2022 28.90 29.03 28.69 28.69
2120 NASDAQ AMPH Tue, Nov 22, 2022 28.50 28.94 28.37 28.78
2119 NASDAQ AMPH Mon, Nov 21, 2022 28.35 28.74 28.02 28.40
2118 NASDAQ AMPH Fri, Nov 18, 2022 28.73 28.94 28.24 28.40
2117 NASDAQ AMPH Thu, Nov 17, 2022 28.19 28.63 27.82 28.33
2116 NASDAQ AMPH Wed, Nov 16, 2022 28.42 28.59 28.17 28.29
2115 NASDAQ AMPH Tue, Nov 15, 2022 28.63 29.04 28.20 28.37
2114 NASDAQ AMPH Mon, Nov 14, 2022 28.44 28.92 28.32 28.36
2113 NASDAQ AMPH Fri, Nov 11, 2022 28.31 28.49 27.74 28.31
2112 NASDAQ AMPH Thu, Nov 10, 2022 28.39 28.87 27.89 28.48
2111 NASDAQ AMPH Wed, Nov 9, 2022 27.12 28.93 27.00 28.26
2110 NASDAQ AMPH Tue, Nov 8, 2022 28.90 28.90 26.76 27.28
2109 NASDAQ AMPH Mon, Nov 7, 2022 29.65 30.64 29.65 30.10
2108 NASDAQ AMPH Fri, Nov 4, 2022 29.98 30.03 29.36 29.76
2107 NASDAQ AMPH Thu, Nov 3, 2022 30.20 30.34 29.58 29.77
2106 NASDAQ AMPH Wed, Nov 2, 2022 31.08 31.13 30.15 30.35
2105 NASDAQ AMPH Tue, Nov 1, 2022 30.99 31.39 30.64 31.27
2104 NASDAQ AMPH Mon, Oct 31, 2022 31.20 31.21 30.66 30.90
2103 NASDAQ AMPH Fri, Oct 28, 2022 30.53 31.64 30.50 30.98
2102 NASDAQ AMPH Thu, Oct 27, 2022 30.71 31.22 30.32 30.35
2101 NASDAQ AMPH Wed, Oct 26, 2022 29.83 31.19 29.81 30.59
2100 NASDAQ AMPH Tue, Oct 25, 2022 30.84 30.85 29.08 29.64
2099 NASDAQ AMPH Mon, Oct 24, 2022 30.81 31.50 30.60 30.88
2098 NASDAQ AMPH Fri, Oct 21, 2022 29.71 30.99 29.52 30.66
2097 NASDAQ AMPH Thu, Oct 20, 2022 29.10 29.56 28.86 29.10
2096 NASDAQ AMPH Wed, Oct 19, 2022 29.85 30.07 28.83 29.23
2095 NASDAQ AMPH Tue, Oct 18, 2022 29.49 30.18 29.49 29.88
2094 NASDAQ AMPH Mon, Oct 17, 2022 28.94 29.78 28.57 29.32
2093 NASDAQ AMPH Fri, Oct 14, 2022 28.75 29.25 28.29 28.53
2092 NASDAQ AMPH Thu, Oct 13, 2022 27.61 28.81 27.50 28.66
2091 NASDAQ AMPH Wed, Oct 12, 2022 28.20 28.47 27.64 27.67
2090 NASDAQ AMPH Tue, Oct 11, 2022 27.88 28.90 27.49 28.09
2089 NASDAQ AMPH Mon, Oct 10, 2022 29.20 29.30 28.02 28.02
2088 NASDAQ AMPH Fri, Oct 7, 2022 28.98 29.09 28.63 29.04
2087 NASDAQ AMPH Thu, Oct 6, 2022 28.26 28.96 28.26 28.86
2086 NASDAQ AMPH Wed, Oct 5, 2022 28.28 28.51 28.01 28.35
2085 NASDAQ AMPH Tue, Oct 4, 2022 28.72 29.13 28.28 28.54
2084 NASDAQ AMPH Mon, Oct 3, 2022 28.37 28.95 27.87 28.40
2083 NASDAQ AMPH Fri, Sep 30, 2022 28.97 29.34 28.07 28.10
2082 NASDAQ AMPH Thu, Sep 29, 2022 29.10 29.51 28.75 28.99
2081 NASDAQ AMPH Wed, Sep 28, 2022 28.85 29.56 28.63 29.33
2080 NASDAQ AMPH Tue, Sep 27, 2022 28.36 28.67 28.12 28.37
2079 NASDAQ AMPH Mon, Sep 26, 2022 27.46 28.66 27.46 28.24
2078 NASDAQ AMPH Fri, Sep 23, 2022 27.17 27.59 27.10 27.56
2077 NASDAQ AMPH Thu, Sep 22, 2022 27.88 28.01 27.34 27.59
2076 NASDAQ AMPH Wed, Sep 21, 2022 28.51 28.67 27.91 27.97
2075 NASDAQ AMPH Tue, Sep 20, 2022 28.39 28.43 28.13 28.26
2074 NASDAQ AMPH Mon, Sep 19, 2022 28.94 29.19 27.82 28.45
2073 NASDAQ AMPH Fri, Sep 16, 2022 29.23 29.33 28.64 29.23
2072 NASDAQ AMPH Thu, Sep 15, 2022 29.62 29.81 28.90 29.33
2071 NASDAQ AMPH Wed, Sep 14, 2022 28.94 30.21 28.88 29.62
2070 NASDAQ AMPH Tue, Sep 13, 2022 28.61 29.16 28.44 28.93
2069 NASDAQ AMPH Mon, Sep 12, 2022 28.29 29.31 28.25 29.03
2068 NASDAQ AMPH Fri, Sep 9, 2022 28.45 28.80 28.00 28.17
2067 NASDAQ AMPH Thu, Sep 8, 2022 28.48 28.69 27.89 28.18
2066 NASDAQ AMPH Wed, Sep 7, 2022 28.27 28.61 27.61 28.47
2065 NASDAQ AMPH Tue, Sep 6, 2022 28.91 29.01 28.30 28.36
2064 NASDAQ AMPH Fri, Sep 2, 2022 29.68 30.05 28.84 28.91
2063 NASDAQ AMPH Thu, Sep 1, 2022 29.60 29.81 28.70 29.70
2062 NASDAQ AMPH Wed, Aug 31, 2022 30.10 30.29 29.57 29.60
2061 NASDAQ AMPH Tue, Aug 30, 2022 30.34 30.44 29.80 30.04
2060 NASDAQ AMPH Mon, Aug 29, 2022 30.85 30.97 30.38 30.42
2059 NASDAQ AMPH Fri, Aug 26, 2022 31.44 31.73 30.81 31.01
2058 NASDAQ AMPH Thu, Aug 25, 2022 31.86 32.15 31.44 31.58
2057 NASDAQ AMPH Wed, Aug 24, 2022 32.41 32.41 31.54 31.78
2056 NASDAQ AMPH Tue, Aug 23, 2022 32.95 32.99 31.82 32.41
2055 NASDAQ AMPH Mon, Aug 22, 2022 33.59 34.35 32.81 33.02
2054 NASDAQ AMPH Fri, Aug 19, 2022 32.46 33.95 32.20 33.76
2053 NASDAQ AMPH Thu, Aug 18, 2022 32.04 32.53 31.76 32.44
2052 NASDAQ AMPH Wed, Aug 17, 2022 32.52 32.55 31.94 32.04
2051 NASDAQ AMPH Tue, Aug 16, 2022 32.62 33.05 32.11 32.52
2050 NASDAQ AMPH Mon, Aug 15, 2022 31.60 32.61 31.35 32.53
2049 NASDAQ AMPH Fri, Aug 12, 2022 31.34 32.20 31.25 31.62
2048 NASDAQ AMPH Thu, Aug 11, 2022 32.00 32.30 30.52 31.32
2047 NASDAQ AMPH Wed, Aug 10, 2022 32.24 33.15 31.91 32.06
2046 NASDAQ AMPH Tue, Aug 9, 2022 38.13 39.07 30.74 32.06
2045 NASDAQ AMPH Mon, Aug 8, 2022 36.53 38.20 36.53 37.75
2044 NASDAQ AMPH Fri, Aug 5, 2022 36.61 36.98 35.48 36.76
2043 NASDAQ AMPH Thu, Aug 4, 2022 37.35 37.88 36.50 36.96
2042 NASDAQ AMPH Wed, Aug 3, 2022 37.71 37.71 36.43 37.29
2041 NASDAQ AMPH Tue, Aug 2, 2022 36.99 37.79 36.99 37.38
2040 NASDAQ AMPH Mon, Aug 1, 2022 37.18 37.95 36.97 36.99
2039 NASDAQ AMPH Fri, Jul 29, 2022 37.62 37.96 36.82 37.39
2038 NASDAQ AMPH Thu, Jul 28, 2022 37.19 37.62 36.24 37.27
2037 NASDAQ AMPH Wed, Jul 27, 2022 37.09 37.28 35.97 37.20
2036 NASDAQ AMPH Tue, Jul 26, 2022 36.88 37.45 36.66 37.12
2035 NASDAQ AMPH Mon, Jul 25, 2022 36.13 36.95 36.04 36.88
2034 NASDAQ AMPH Fri, Jul 22, 2022 36.09 36.30 35.55 35.96
2033 NASDAQ AMPH Thu, Jul 21, 2022 35.60 36.12 35.00 36.09
2032 NASDAQ AMPH Wed, Jul 20, 2022 36.40 36.65 35.27 35.61
2031 NASDAQ AMPH Tue, Jul 19, 2022 36.97 37.67 36.61 36.64
2030 NASDAQ AMPH Mon, Jul 18, 2022 37.29 37.79 36.43 36.70
2029 NASDAQ AMPH Fri, Jul 15, 2022 35.93 37.34 35.14 36.99
2028 NASDAQ AMPH Thu, Jul 14, 2022 35.16 35.68 34.68 35.56
2027 NASDAQ AMPH Wed, Jul 13, 2022 35.32 36.26 35.03 35.80
2026 NASDAQ AMPH Tue, Jul 12, 2022 36.80 36.88 35.34 35.82
2025 NASDAQ AMPH Mon, Jul 11, 2022 36.11 36.65 35.58 36.63
2024 NASDAQ AMPH Fri, Jul 8, 2022 36.50 36.77 35.91 36.11
2023 NASDAQ AMPH Thu, Jul 7, 2022 35.47 36.74 35.25 36.41
2022 NASDAQ AMPH Wed, Jul 6, 2022 34.44 35.98 34.44 35.28
2021 NASDAQ AMPH Tue, Jul 5, 2022 34.82 35.55 33.81 34.66
2020 NASDAQ AMPH Fri, Jul 1, 2022 34.75 35.41 34.42 35.35
2019 NASDAQ AMPH Thu, Jun 30, 2022 33.77 35.30 33.69 34.79
2018 NASDAQ AMPH Wed, Jun 29, 2022 33.52 34.49 32.54 34.15
2017 NASDAQ AMPH Tue, Jun 28, 2022 34.18 34.39 32.90 33.25
2016 NASDAQ AMPH Mon, Jun 27, 2022 32.22 34.69 31.94 34.28
2015 NASDAQ AMPH Fri, Jun 24, 2022 32.89 33.00 31.52 31.78
2014 NASDAQ AMPH Thu, Jun 23, 2022 31.72 32.90 31.72 32.74
2013 NASDAQ AMPH Wed, Jun 22, 2022 31.35 32.38 31.30 31.71
2012 NASDAQ AMPH Tue, Jun 21, 2022 31.98 32.50 31.13 31.61
2011 NASDAQ AMPH Fri, Jun 17, 2022 31.35 32.57 31.27 31.52
2010 NASDAQ AMPH Thu, Jun 16, 2022 30.90 31.57 30.60 31.11
2009 NASDAQ AMPH Wed, Jun 15, 2022 30.94 31.85 30.44 31.32
2008 NASDAQ AMPH Tue, Jun 14, 2022 29.73 31.22 29.73 31.02
2007 NASDAQ AMPH Mon, Jun 13, 2022 29.12 30.61 29.00 29.79
2006 NASDAQ AMPH Fri, Jun 10, 2022 29.71 30.84 29.34 30.02
2005 NASDAQ AMPH Thu, Jun 9, 2022 37.66 38.74 28.64 30.19
2004 NASDAQ AMPH Wed, Jun 8, 2022 41.72 42.31 37.45 38.29
2003 NASDAQ AMPH Tue, Jun 7, 2022 37.33 41.94 37.33 41.41
2002 NASDAQ AMPH Mon, Jun 6, 2022 38.15 38.30 37.37 37.47
2001 NASDAQ AMPH Fri, Jun 3, 2022 38.00 38.73 36.64 37.77
2000 NASDAQ AMPH Thu, Jun 2, 2022 37.64 38.44 36.41 38.27
1999 NASDAQ AMPH Wed, Jun 1, 2022 37.39 38.10 36.11 37.66
1998 NASDAQ AMPH Tue, May 31, 2022 39.22 39.98 36.68 37.14
1997 NASDAQ AMPH Fri, May 27, 2022 36.15 39.26 36.01 38.87
1996 NASDAQ AMPH Thu, May 26, 2022 36.12 36.83 35.75 36.18
1995 NASDAQ AMPH Wed, May 25, 2022 33.94 37.05 33.94 36.72
1994 NASDAQ AMPH Tue, May 24, 2022 34.27 34.90 33.59 33.94
1993 NASDAQ AMPH Mon, May 23, 2022 34.21 35.20 33.93 34.80
1992 NASDAQ AMPH Fri, May 20, 2022 33.68 34.71 33.41 33.70
1991 NASDAQ AMPH Thu, May 19, 2022 33.77 34.32 33.25 33.70
1990 NASDAQ AMPH Wed, May 18, 2022 35.74 36.16 33.45 34.07
1989 NASDAQ AMPH Tue, May 17, 2022 35.60 36.27 35.07 35.93
1988 NASDAQ AMPH Mon, May 16, 2022 35.20 36.66 35.18 35.37
1987 NASDAQ AMPH Fri, May 13, 2022 35.09 35.43 34.19 35.34
1986 NASDAQ AMPH Thu, May 12, 2022 33.09 34.94 32.99 34.80
1985 NASDAQ AMPH Wed, May 11, 2022 33.87 34.24 32.89 32.98
1984 NASDAQ AMPH Tue, May 10, 2022 31.33 34.25 31.14 34.00
1983 NASDAQ AMPH Mon, May 9, 2022 32.18 33.05 31.33 31.76
1982 NASDAQ AMPH Fri, May 6, 2022 34.10 34.34 32.49 32.71
1981 NASDAQ AMPH Thu, May 5, 2022 34.94 35.40 33.50 34.10
1980 NASDAQ AMPH Wed, May 4, 2022 35.31 35.34 34.02 35.02
1979 NASDAQ AMPH Tue, May 3, 2022 35.34 35.73 34.50 35.09
1978 NASDAQ AMPH Mon, May 2, 2022 35.30 35.69 34.47 35.31
1977 NASDAQ AMPH Fri, Apr 29, 2022 35.43 36.16 34.98 35.47
1976 NASDAQ AMPH Thu, Apr 28, 2022 36.39 36.39 34.89 35.43
1975 NASDAQ AMPH Wed, Apr 27, 2022 36.22 37.06 35.63 36.05
1974 NASDAQ AMPH Tue, Apr 26, 2022 36.92 38.21 36.00 36.14
1973 NASDAQ AMPH Mon, Apr 25, 2022 36.88 37.44 35.43 36.88
1972 NASDAQ AMPH Fri, Apr 22, 2022 38.38 38.87 37.32 37.38
1971 NASDAQ AMPH Thu, Apr 21, 2022 38.70 40.21 38.08 38.44
1970 NASDAQ AMPH Wed, Apr 20, 2022 39.05 39.49 38.40 39.11
1969 NASDAQ AMPH Tue, Apr 19, 2022 38.63 39.84 38.52 39.04
1968 NASDAQ AMPH Mon, Apr 18, 2022 40.29 41.10 38.18 38.43
1967 NASDAQ AMPH Thu, Apr 14, 2022 42.87 44.46 41.28 41.54
1966 NASDAQ AMPH Wed, Apr 13, 2022 42.18 43.19 41.66 42.29
1965 NASDAQ AMPH Tue, Apr 12, 2022 40.82 42.75 40.54 42.10
1964 NASDAQ AMPH Mon, Apr 11, 2022 41.66 43.20 40.79 41.25
1963 NASDAQ AMPH Fri, Apr 8, 2022 40.28 41.65 39.81 41.16
1962 NASDAQ AMPH Thu, Apr 7, 2022 37.93 40.36 37.48 40.17
1961 NASDAQ AMPH Wed, Apr 6, 2022 36.60 38.00 36.55 37.79
1960 NASDAQ AMPH Tue, Apr 5, 2022 38.19 39.02 36.63 36.82
1959 NASDAQ AMPH Mon, Apr 4, 2022 37.50 38.10 36.79 37.89
1958 NASDAQ AMPH Fri, Apr 1, 2022 36.14 37.49 35.54 37.41
1957 NASDAQ AMPH Thu, Mar 31, 2022 36.50 37.16 35.67 35.90
1956 NASDAQ AMPH Wed, Mar 30, 2022 35.96 36.82 35.93 36.43
1955 NASDAQ AMPH Tue, Mar 29, 2022 36.37 36.86 35.37 35.83
1954 NASDAQ AMPH Mon, Mar 28, 2022 36.37 36.79 35.93 36.45
1953 NASDAQ AMPH Fri, Mar 25, 2022 35.87 36.97 35.70 36.44
1952 NASDAQ AMPH Thu, Mar 24, 2022 35.56 36.22 35.06 35.77
1951 NASDAQ AMPH Wed, Mar 23, 2022 35.44 36.20 35.27 35.48
1950 NASDAQ AMPH Tue, Mar 22, 2022 35.74 36.00 34.25 35.54
1949 NASDAQ AMPH Mon, Mar 21, 2022 34.56 35.72 34.15 35.45
1948 NASDAQ AMPH Fri, Mar 18, 2022 34.86 35.00 33.82 34.22
1947 NASDAQ AMPH Thu, Mar 17, 2022 34.49 35.58 33.97 34.18
1946 NASDAQ AMPH Wed, Mar 16, 2022 35.00 35.00 33.23 34.22
1945 NASDAQ AMPH Tue, Mar 15, 2022 34.49 34.86 33.85 34.74
1944 NASDAQ AMPH Mon, Mar 14, 2022 34.30 35.74 32.56 34.81
1943 NASDAQ AMPH Fri, Mar 11, 2022 30.00 34.96 29.67 34.30
1942 NASDAQ AMPH Thu, Mar 10, 2022 30.10 30.79 29.88 30.47
1941 NASDAQ AMPH Wed, Mar 9, 2022 30.01 30.68 29.60 30.10
1940 NASDAQ AMPH Tue, Mar 8, 2022 30.09 30.69 29.91 29.91
1939 NASDAQ AMPH Mon, Mar 7, 2022 28.72 30.92 28.50 30.74
1938 NASDAQ AMPH Fri, Mar 4, 2022 28.05 28.74 27.89 28.63
1937 NASDAQ AMPH Thu, Mar 3, 2022 28.56 28.97 28.30 28.46
1936 NASDAQ AMPH Wed, Mar 2, 2022 27.50 28.83 27.39 28.40
1935 NASDAQ AMPH Tue, Mar 1, 2022 27.75 28.08 26.90 27.43
1934 NASDAQ AMPH Mon, Feb 28, 2022 28.77 28.98 27.36 27.71
1933 NASDAQ AMPH Fri, Feb 25, 2022 27.79 29.19 27.64 28.77
1932 NASDAQ AMPH Thu, Feb 24, 2022 26.77 27.90 26.52 27.56
1931 NASDAQ AMPH Wed, Feb 23, 2022 26.84 27.90 26.49 27.46
1930 NASDAQ AMPH Tue, Feb 22, 2022 26.25 26.40 25.84 26.10
1929 NASDAQ AMPH Fri, Feb 18, 2022 25.85 26.46 25.71 26.21
1928 NASDAQ AMPH Thu, Feb 17, 2022 26.35 26.35 25.61 26.02
1927 NASDAQ AMPH Wed, Feb 16, 2022 26.40 26.84 26.21 26.52
1926 NASDAQ AMPH Tue, Feb 15, 2022 26.16 26.89 26.16 26.40
1925 NASDAQ AMPH Mon, Feb 14, 2022 27.25 27.36 25.84 26.05
1924 NASDAQ AMPH Fri, Feb 11, 2022 26.41 27.29 26.35 27.14
1923 NASDAQ AMPH Thu, Feb 10, 2022 25.90 26.42 25.63 26.32
1922 NASDAQ AMPH Wed, Feb 9, 2022 26.75 26.98 25.93 26.07
1921 NASDAQ AMPH Tue, Feb 8, 2022 26.52 27.28 25.38 26.51
1920 NASDAQ AMPH Mon, Feb 7, 2022 25.13 26.74 24.75 26.27
1919 NASDAQ AMPH Fri, Feb 4, 2022 25.37 25.52 24.76 25.04
1918 NASDAQ AMPH Thu, Feb 3, 2022 25.10 25.60 24.63 25.44
1917 NASDAQ AMPH Wed, Feb 2, 2022 24.34 25.49 23.85 25.33
1916 NASDAQ AMPH Tue, Feb 1, 2022 23.03 24.70 22.97 24.68
1915 NASDAQ AMPH Mon, Jan 31, 2022 26.10 26.49 22.07 23.09
1914 NASDAQ AMPH Fri, Jan 28, 2022 24.98 26.09 24.90 26.06
1913 NASDAQ AMPH Thu, Jan 27, 2022 24.65 25.18 24.65 25.03
1912 NASDAQ AMPH Wed, Jan 26, 2022 24.91 25.36 24.51 24.63
1911 NASDAQ AMPH Tue, Jan 25, 2022 24.53 24.99 24.00 24.91
1910 NASDAQ AMPH Mon, Jan 24, 2022 24.53 24.94 23.57 24.72
1909 NASDAQ AMPH Fri, Jan 21, 2022 24.37 25.33 24.22 24.75
1908 NASDAQ AMPH Thu, Jan 20, 2022 25.05 25.40 24.61 24.63
1907 NASDAQ AMPH Wed, Jan 19, 2022 25.34 25.50 24.89 25.09
1906 NASDAQ AMPH Tue, Jan 18, 2022 25.41 25.47 24.80 25.35
1905 NASDAQ AMPH Fri, Jan 14, 2022 24.85 25.37 24.48 25.37
1904 NASDAQ AMPH Thu, Jan 13, 2022 25.68 25.68 24.73 24.91
1903 NASDAQ AMPH Wed, Jan 12, 2022 25.24 25.65 25.08 25.61
1902 NASDAQ AMPH Tue, Jan 11, 2022 25.87 25.87 25.05 25.30
1901 NASDAQ AMPH Mon, Jan 10, 2022 25.07 25.87 24.53 25.83
1900 NASDAQ AMPH Fri, Jan 7, 2022 23.75 25.06 23.62 25.05
1899 NASDAQ AMPH Thu, Jan 6, 2022 23.09 23.20 22.80 23.18
1898 NASDAQ AMPH Wed, Jan 5, 2022 23.00 23.25 22.96 23.08
1897 NASDAQ AMPH Tue, Jan 4, 2022 23.13 23.24 22.86 22.96
1896 NASDAQ AMPH Mon, Jan 3, 2022 23.38 23.75 22.87 23.07
1895 NASDAQ AMPH Fri, Dec 31, 2021 23.25 23.85 23.08 23.29
1894 NASDAQ AMPH Thu, Dec 30, 2021 22.90 23.81 22.82 23.14
1893 NASDAQ AMPH Wed, Dec 29, 2021 22.90 23.10 22.79 22.94
1892 NASDAQ AMPH Tue, Dec 28, 2021 22.68 22.95 22.63 22.84
1891 NASDAQ AMPH Mon, Dec 27, 2021 22.51 22.90 22.48 22.87
1890 NASDAQ AMPH Thu, Dec 23, 2021 22.62 22.95 22.57 22.59
1889 NASDAQ AMPH Wed, Dec 22, 2021 22.22 22.78 21.95 22.71
1888 NASDAQ AMPH Tue, Dec 21, 2021 22.50 22.50 21.94 22.19
1887 NASDAQ AMPH Mon, Dec 20, 2021 21.65 22.26 21.40 22.19
1886 NASDAQ AMPH Fri, Dec 17, 2021 21.52 22.32 21.52 21.83
1885 NASDAQ AMPH Thu, Dec 16, 2021 22.37 22.40 21.54 21.67
1884 NASDAQ AMPH Wed, Dec 15, 2021 21.50 22.38 21.41 22.35
1883 NASDAQ AMPH Tue, Dec 14, 2021 21.42 21.90 21.26 21.60
1882 NASDAQ AMPH Mon, Dec 13, 2021 21.54 21.65 21.18 21.42
1881 NASDAQ AMPH Fri, Dec 10, 2021 21.50 21.62 21.16 21.49
1880 NASDAQ AMPH Thu, Dec 9, 2021 21.13 21.69 21.13 21.41
1879 NASDAQ AMPH Wed, Dec 8, 2021 21.23 21.30 21.00 21.28
1878 NASDAQ AMPH Tue, Dec 7, 2021 20.95 21.33 20.84 21.09
1877 NASDAQ AMPH Mon, Dec 6, 2021 20.69 20.88 20.17 20.87
1876 NASDAQ AMPH Fri, Dec 3, 2021 20.20 20.66 20.12 20.41
1875 NASDAQ AMPH Thu, Dec 2, 2021 19.89 20.47 19.84 20.10
1874 NASDAQ AMPH Wed, Dec 1, 2021 19.98 20.40 19.75 19.86
1873 NASDAQ AMPH Tue, Nov 30, 2021 19.44 20.37 19.44 19.56
1872 NASDAQ AMPH Mon, Nov 29, 2021 20.08 20.83 19.21 19.48
1871 NASDAQ AMPH Fri, Nov 26, 2021 20.78 20.98 19.90 19.91
1870 NASDAQ AMPH Wed, Nov 24, 2021 21.54 21.54 20.73 20.92
1869 NASDAQ AMPH Tue, Nov 23, 2021 21.10 21.43 21.04 21.18
1868 NASDAQ AMPH Mon, Nov 22, 2021 20.68 21.38 20.57 21.08
1867 NASDAQ AMPH Fri, Nov 19, 2021 20.01 20.65 20.01 20.51
1866 NASDAQ AMPH Thu, Nov 18, 2021 20.90 20.93 20.02 20.10
1865 NASDAQ AMPH Wed, Nov 17, 2021 21.11 21.28 20.87 20.92
1864 NASDAQ AMPH Tue, Nov 16, 2021 21.03 21.44 21.03 21.26
1863 NASDAQ AMPH Mon, Nov 15, 2021 21.38 21.50 21.04 21.15
1862 NASDAQ AMPH Fri, Nov 12, 2021 21.32 21.49 21.18 21.30
1861 NASDAQ AMPH Thu, Nov 11, 2021 20.92 21.70 20.91 21.18
1860 NASDAQ AMPH Wed, Nov 10, 2021 20.61 21.32 20.52 21.15
1859 NASDAQ AMPH Tue, Nov 9, 2021 20.05 21.49 20.00 20.76
1858 NASDAQ AMPH Mon, Nov 8, 2021 20.09 20.20 19.92 19.95
1857 NASDAQ AMPH Fri, Nov 5, 2021 19.80 20.15 19.61 20.08
1856 NASDAQ AMPH Thu, Nov 4, 2021 19.61 19.76 19.42 19.76
1855 NASDAQ AMPH Wed, Nov 3, 2021 19.19 19.65 19.16 19.58
1854 NASDAQ AMPH Tue, Nov 2, 2021 19.16 19.46 18.82 19.23
1853 NASDAQ AMPH Mon, Nov 1, 2021 18.64 18.94 18.56 18.88
1852 NASDAQ AMPH Fri, Oct 29, 2021 18.13 18.77 18.12 18.68
1851 NASDAQ AMPH Thu, Oct 28, 2021 18.44 18.60 18.13 18.14
1850 NASDAQ AMPH Wed, Oct 27, 2021 18.87 18.92 18.28 18.36
1849 NASDAQ AMPH Tue, Oct 26, 2021 19.06 19.08 18.58 18.92
1848 NASDAQ AMPH Mon, Oct 25, 2021 19.21 19.28 18.90 19.10
1847 NASDAQ AMPH Fri, Oct 22, 2021 19.25 19.41 19.10 19.19
1846 NASDAQ AMPH Thu, Oct 21, 2021 19.43 19.49 19.08 19.26
1845 NASDAQ AMPH Wed, Oct 20, 2021 19.14 19.55 19.14 19.45
1844 NASDAQ AMPH Tue, Oct 19, 2021 19.07 19.25 19.07 19.11
1843 NASDAQ AMPH Mon, Oct 18, 2021 18.98 19.14 18.92 19.03
1842 NASDAQ AMPH Fri, Oct 15, 2021 19.44 19.59 19.11 19.11
1841 NASDAQ AMPH Thu, Oct 14, 2021 19.37 19.47 19.20 19.23
1840 NASDAQ AMPH Wed, Oct 13, 2021 19.19 19.35 19.19 19.22
1839 NASDAQ AMPH Tue, Oct 12, 2021 19.42 19.63 19.18 19.24
1838 NASDAQ AMPH Mon, Oct 11, 2021 19.49 19.76 19.40 19.43
1837 NASDAQ AMPH Fri, Oct 8, 2021 19.18 19.69 19.18 19.46
1836 NASDAQ AMPH Thu, Oct 7, 2021 19.24 19.64 19.21 19.25
1835 NASDAQ AMPH Wed, Oct 6, 2021 18.68 19.24 18.68 19.15
1834 NASDAQ AMPH Tue, Oct 5, 2021 18.97 19.20 18.82 18.84
1833 NASDAQ AMPH Mon, Oct 4, 2021 19.40 19.52 19.08 19.10
1832 NASDAQ AMPH Fri, Oct 1, 2021 19.02 19.44 19.02 19.35
1831 NASDAQ AMPH Thu, Sep 30, 2021 19.32 19.41 18.93 19.01
1830 NASDAQ AMPH Wed, Sep 29, 2021 18.95 19.30 18.88 19.21
1829 NASDAQ AMPH Tue, Sep 28, 2021 19.29 19.41 18.88 18.91
1828 NASDAQ AMPH Mon, Sep 27, 2021 18.80 19.46 18.62 19.26
1827 NASDAQ AMPH Fri, Sep 24, 2021 18.63 18.79 18.62 18.71
1826 NASDAQ AMPH Thu, Sep 23, 2021 18.48 18.77 18.48 18.68
1825 NASDAQ AMPH Wed, Sep 22, 2021 18.58 18.63 18.36 18.45
1824 NASDAQ AMPH Tue, Sep 21, 2021 18.69 18.80 18.43 18.45
1823 NASDAQ AMPH Mon, Sep 20, 2021 18.15 18.77 18.11 18.71
1822 NASDAQ AMPH Fri, Sep 17, 2021 17.88 18.42 17.75 18.37
1821 NASDAQ AMPH Thu, Sep 16, 2021 17.82 18.08 17.56 17.93
1820 NASDAQ AMPH Wed, Sep 15, 2021 18.00 18.32 17.85 17.88
1819 NASDAQ AMPH Tue, Sep 14, 2021 18.56 18.59 17.82 17.98
1818 NASDAQ AMPH Mon, Sep 13, 2021 18.07 18.50 17.80 18.45
1817 NASDAQ AMPH Fri, Sep 10, 2021 18.00 18.66 17.80 17.83
1816 NASDAQ AMPH Thu, Sep 9, 2021 19.47 19.47 18.05 18.05
1815 NASDAQ AMPH Wed, Sep 8, 2021 19.30 19.30 18.53 18.72
1814 NASDAQ AMPH Tue, Sep 7, 2021 19.20 19.85 18.75 18.80
1813 NASDAQ AMPH Fri, Sep 3, 2021 19.52 19.52 19.23 19.27
1812 NASDAQ AMPH Thu, Sep 2, 2021 19.70 19.94 19.42 19.53
1811 NASDAQ AMPH Wed, Sep 1, 2021 19.58 19.83 19.57 19.74
1810 NASDAQ AMPH Tue, Aug 31, 2021 19.31 19.67 19.31 19.66
1809 NASDAQ AMPH Mon, Aug 30, 2021 19.27 19.49 19.27 19.38
1808 NASDAQ AMPH Fri, Aug 27, 2021 18.95 19.49 18.95 19.30
1807 NASDAQ AMPH Thu, Aug 26, 2021 18.78 19.05 18.73 18.90
1806 NASDAQ AMPH Wed, Aug 25, 2021 19.01 19.09 18.80 18.86
1805 NASDAQ AMPH Tue, Aug 24, 2021 19.17 19.47 19.13 19.22
1804 NASDAQ AMPH Mon, Aug 23, 2021 18.85 19.21 18.85 19.17
1803 NASDAQ AMPH Fri, Aug 20, 2021 18.59 19.47 18.59 18.89
1802 NASDAQ AMPH Thu, Aug 19, 2021 18.98 19.06 18.50 18.68
1801 NASDAQ AMPH Wed, Aug 18, 2021 19.13 19.43 19.05 19.08
1800 NASDAQ AMPH Tue, Aug 17, 2021 19.27 19.28 19.05 19.16
1799 NASDAQ AMPH Mon, Aug 16, 2021 19.59 19.60 19.26 19.33
1798 NASDAQ AMPH Fri, Aug 13, 2021 19.59 19.75 19.30 19.60
1797 NASDAQ AMPH Thu, Aug 12, 2021 19.99 20.19 19.47 19.53
1796 NASDAQ AMPH Wed, Aug 11, 2021 20.42 20.59 19.89 19.92
1795 NASDAQ AMPH Tue, Aug 10, 2021 20.30 21.06 20.09 20.32
1794 NASDAQ AMPH Mon, Aug 9, 2021 20.39 20.39 20.00 20.08
1793 NASDAQ AMPH Fri, Aug 6, 2021 20.13 20.67 20.13 20.31
1792 NASDAQ AMPH Thu, Aug 5, 2021 20.65 20.72 20.23 20.35
1791 NASDAQ AMPH Wed, Aug 4, 2021 21.34 21.44 20.66 20.68
1790 NASDAQ AMPH Tue, Aug 3, 2021 21.18 21.63 21.18 21.49
1789 NASDAQ AMPH Mon, Aug 2, 2021 20.80 21.30 20.80 21.24
1788 NASDAQ AMPH Fri, Jul 30, 2021 20.80 20.97 20.47 20.95
1787 NASDAQ AMPH Thu, Jul 29, 2021 20.82 20.91 20.68 20.77
1786 NASDAQ AMPH Wed, Jul 28, 2021 20.80 20.97 20.23 20.90
1785 NASDAQ AMPH Tue, Jul 27, 2021 20.68 20.82 20.42 20.79
1784 NASDAQ AMPH Mon, Jul 26, 2021 20.70 20.89 20.67 20.69
1783 NASDAQ AMPH Fri, Jul 23, 2021 20.48 20.86 20.31 20.86
1782 NASDAQ AMPH Thu, Jul 22, 2021 20.41 20.49 20.26 20.41
1781 NASDAQ AMPH Wed, Jul 21, 2021 20.18 20.50 20.14 20.43
1780 NASDAQ AMPH Tue, Jul 20, 2021 20.10 20.60 19.99 20.16
1779 NASDAQ AMPH Mon, Jul 19, 2021 19.87 20.05 19.19 20.02
1778 NASDAQ AMPH Fri, Jul 16, 2021 20.17 20.19 19.90 20.06
1777 NASDAQ AMPH Thu, Jul 15, 2021 19.97 20.13 19.79 20.02
1776 NASDAQ AMPH Wed, Jul 14, 2021 19.89 20.17 19.71 20.01
1775 NASDAQ AMPH Tue, Jul 13, 2021 20.07 20.30 19.82 19.89
1774 NASDAQ AMPH Mon, Jul 12, 2021 20.05 20.07 19.81 20.03
1773 NASDAQ AMPH Fri, Jul 9, 2021 20.46 20.55 20.02 20.06
1772 NASDAQ AMPH Thu, Jul 8, 2021 20.31 20.46 19.74 20.41
1771 NASDAQ AMPH Wed, Jul 7, 2021 20.48 20.58 20.26 20.35
1770 NASDAQ AMPH Tue, Jul 6, 2021 20.40 20.60 20.39 20.49
1769 NASDAQ AMPH Fri, Jul 2, 2021 20.39 20.69 20.25 20.61
1768 NASDAQ AMPH Thu, Jul 1, 2021 20.24 20.55 20.09 20.44
1767 NASDAQ AMPH Wed, Jun 30, 2021 20.20 20.26 19.97 20.16
1766 NASDAQ AMPH Tue, Jun 29, 2021 20.77 20.82 20.21 20.29
1765 NASDAQ AMPH Mon, Jun 28, 2021 20.90 20.90 20.46 20.76
1764 NASDAQ AMPH Fri, Jun 25, 2021 20.87 20.94 20.67 20.92
1763 NASDAQ AMPH Thu, Jun 24, 2021 20.20 20.91 20.20 20.88
1762 NASDAQ AMPH Wed, Jun 23, 2021 20.10 20.34 20.05 20.31
1761 NASDAQ AMPH Tue, Jun 22, 2021 20.17 20.25 19.99 20.20
1760 NASDAQ AMPH Mon, Jun 21, 2021 20.17 20.29 20.04 20.18
1759 NASDAQ AMPH Fri, Jun 18, 2021 20.28 20.31 19.84 20.17
1758 NASDAQ AMPH Thu, Jun 17, 2021 20.17 20.46 20.08 20.39
1757 NASDAQ AMPH Wed, Jun 16, 2021 20.06 20.15 19.84 20.13
1756 NASDAQ AMPH Tue, Jun 15, 2021 19.77 20.00 19.66 19.98
1755 NASDAQ AMPH Mon, Jun 14, 2021 19.98 19.98 19.46 19.68
1754 NASDAQ AMPH Fri, Jun 11, 2021 19.66 19.95 19.46 19.92
1753 NASDAQ AMPH Thu, Jun 10, 2021 19.76 19.86 19.60 19.70
1752 NASDAQ AMPH Wed, Jun 9, 2021 19.43 19.71 19.39 19.69
1751 NASDAQ AMPH Tue, Jun 8, 2021 19.56 19.56 18.97 19.43
1750 NASDAQ AMPH Mon, Jun 7, 2021 18.73 19.62 18.64 19.52
1749 NASDAQ AMPH Fri, Jun 4, 2021 18.73 18.84 18.60 18.79
1748 NASDAQ AMPH Thu, Jun 3, 2021 18.72 18.85 18.53 18.66
1747 NASDAQ AMPH Wed, Jun 2, 2021 19.10 19.25 18.73 18.85
1746 NASDAQ AMPH Tue, Jun 1, 2021 19.01 19.48 18.78 19.08
1745 NASDAQ AMPH Fri, May 28, 2021 19.03 19.19 18.86 18.92
1744 NASDAQ AMPH Thu, May 27, 2021 19.47 19.49 18.95 19.01
1743 NASDAQ AMPH Wed, May 26, 2021 19.40 19.50 18.97 19.34
1742 NASDAQ AMPH Tue, May 25, 2021 19.73 19.75 19.33 19.38
1741 NASDAQ AMPH Mon, May 24, 2021 19.82 19.93 19.66 19.76
1740 NASDAQ AMPH Fri, May 21, 2021 19.82 19.95 19.70 19.72
1739 NASDAQ AMPH Thu, May 20, 2021 19.85 20.00 19.65 19.69
1738 NASDAQ AMPH Wed, May 19, 2021 19.57 19.89 19.30 19.82
1737 NASDAQ AMPH Tue, May 18, 2021 19.94 19.96 19.64 19.67
1736 NASDAQ AMPH Mon, May 17, 2021 19.93 20.19 19.65 19.96
1735 NASDAQ AMPH Fri, May 14, 2021 19.58 20.00 19.33 19.97
1734 NASDAQ AMPH Thu, May 13, 2021 19.12 19.58 19.12 19.56
1733 NASDAQ AMPH Wed, May 12, 2021 18.96 19.44 18.96 19.08
1732 NASDAQ AMPH Tue, May 11, 2021 18.70 19.30 18.65 18.98
1731 NASDAQ AMPH Mon, May 10, 2021 18.76 19.49 18.74 19.15
1730 NASDAQ AMPH Fri, May 7, 2021 18.23 19.35 18.14 18.68
1729 NASDAQ AMPH Thu, May 6, 2021 17.91 18.09 17.69 18.05
1728 NASDAQ AMPH Wed, May 5, 2021 18.11 18.13 17.68 17.95
1727 NASDAQ AMPH Tue, May 4, 2021 17.50 18.18 17.40 18.13
1726 NASDAQ AMPH Mon, May 3, 2021 17.41 17.77 17.01 17.49
1725 NASDAQ AMPH Fri, Apr 30, 2021 17.42 17.93 17.22 17.40
1724 NASDAQ AMPH Thu, Apr 29, 2021 17.40 17.63 17.36 17.57
1723 NASDAQ AMPH Wed, Apr 28, 2021 17.17 17.47 17.09 17.39
1722 NASDAQ AMPH Tue, Apr 27, 2021 17.36 17.42 17.15 17.16
1721 NASDAQ AMPH Mon, Apr 26, 2021 17.36 17.55 17.27 17.32
1720 NASDAQ AMPH Fri, Apr 23, 2021 17.59 17.67 17.30 17.32
1719 NASDAQ AMPH Thu, Apr 22, 2021 17.51 17.71 17.35 17.60
1718 NASDAQ AMPH Wed, Apr 21, 2021 17.09 17.59 17.06 17.56
1717 NASDAQ AMPH Tue, Apr 20, 2021 17.27 17.37 17.02 17.14
1716 NASDAQ AMPH Mon, Apr 19, 2021 17.32 17.48 17.05 17.30
1715 NASDAQ AMPH Fri, Apr 16, 2021 17.33 17.38 17.15 17.30
1714 NASDAQ AMPH Thu, Apr 15, 2021 17.49 17.72 17.30 17.35
1713 NASDAQ AMPH Wed, Apr 14, 2021 17.34 17.77 17.32 17.40
1712 NASDAQ AMPH Tue, Apr 13, 2021 17.14 17.54 17.14 17.33
1711 NASDAQ AMPH Mon, Apr 12, 2021 17.83 17.83 16.91 17.11
1710 NASDAQ AMPH Fri, Apr 9, 2021 17.73 17.92 17.67 17.89
1709 NASDAQ AMPH Thu, Apr 8, 2021 17.78 17.97 17.59 17.78
1708 NASDAQ AMPH Wed, Apr 7, 2021 17.59 17.93 17.51 17.74
1707 NASDAQ AMPH Tue, Apr 6, 2021 17.63 17.88 17.52 17.63
1706 NASDAQ AMPH Mon, Apr 5, 2021 18.22 18.22 17.56 17.69
1705 NASDAQ AMPH Thu, Apr 1, 2021 18.33 18.40 17.78 18.09
1704 NASDAQ AMPH Wed, Mar 31, 2021 18.01 18.41 18.01 18.32
1703 NASDAQ AMPH Tue, Mar 30, 2021 18.11 18.32 17.96 18.00
1702 NASDAQ AMPH Mon, Mar 29, 2021 18.31 18.54 18.06 18.11
1701 NASDAQ AMPH Fri, Mar 26, 2021 17.92 18.19 17.86 18.04
1700 NASDAQ AMPH Thu, Mar 25, 2021 17.94 18.04 17.63 17.90
1699 NASDAQ AMPH Wed, Mar 24, 2021 18.08 18.24 17.66 17.66
1698 NASDAQ AMPH Tue, Mar 23, 2021 18.35 18.35 17.85 17.99
1697 NASDAQ AMPH Mon, Mar 22, 2021 18.13 18.59 18.01 18.49
1696 NASDAQ AMPH Fri, Mar 19, 2021 17.89 18.16 17.64 18.07
1695 NASDAQ AMPH Thu, Mar 18, 2021 18.00 18.41 17.84 17.91
1694 NASDAQ AMPH Wed, Mar 17, 2021 18.27 18.40 17.82 17.99
1693 NASDAQ AMPH Tue, Mar 16, 2021 19.25 19.44 17.72 18.44
1692 NASDAQ AMPH Mon, Mar 15, 2021 19.33 19.40 18.88 19.15
1691 NASDAQ AMPH Fri, Mar 12, 2021 19.06 19.41 18.97 19.36
1690 NASDAQ AMPH Thu, Mar 11, 2021 18.96 19.10 18.71 19.04
1689 NASDAQ AMPH Wed, Mar 10, 2021 18.88 18.93 18.61 18.78
1688 NASDAQ AMPH Tue, Mar 9, 2021 18.10 19.14 18.10 18.79
1687 NASDAQ AMPH Mon, Mar 8, 2021 17.44 18.05 17.44 17.96
1686 NASDAQ AMPH Fri, Mar 5, 2021 17.33 17.57 17.12 17.52
1685 NASDAQ AMPH Thu, Mar 4, 2021 17.70 17.80 17.17 17.21
1684 NASDAQ AMPH Wed, Mar 3, 2021 17.48 17.86 17.20 17.78
1683 NASDAQ AMPH Tue, Mar 2, 2021 17.44 17.73 17.15 17.37
1682 NASDAQ AMPH Mon, Mar 1, 2021 17.79 18.03 17.41 17.48
1681 NASDAQ AMPH Fri, Feb 26, 2021 17.55 17.89 17.31 17.53
1680 NASDAQ AMPH Thu, Feb 25, 2021 18.22 18.45 17.86 17.89
1679 NASDAQ AMPH Wed, Feb 24, 2021 17.96 18.45 17.85 18.35
1678 NASDAQ AMPH Tue, Feb 23, 2021 18.05 18.22 17.66 17.77
1677 NASDAQ AMPH Mon, Feb 22, 2021 18.35 18.37 18.04 18.11
1676 NASDAQ AMPH Fri, Feb 19, 2021 18.31 18.60 18.29 18.48
1675 NASDAQ AMPH Thu, Feb 18, 2021 18.57 18.76 18.33 18.35
1674 NASDAQ AMPH Wed, Feb 17, 2021 18.40 18.86 18.30 18.70
1673 NASDAQ AMPH Tue, Feb 16, 2021 18.86 18.96 18.40 18.41
1672 NASDAQ AMPH Fri, Feb 12, 2021 19.11 19.18 18.84 18.88
1671 NASDAQ AMPH Thu, Feb 11, 2021 18.90 19.21 18.75 19.14
1670 NASDAQ AMPH Wed, Feb 10, 2021 18.91 18.94 18.48 18.83
1669 NASDAQ AMPH Tue, Feb 9, 2021 18.93 19.11 18.71 18.93
1668 NASDAQ AMPH Mon, Feb 8, 2021 19.08 19.18 18.68 18.86
1667 NASDAQ AMPH Fri, Feb 5, 2021 19.07 19.21 18.73 19.07
1666 NASDAQ AMPH Thu, Feb 4, 2021 18.38 19.07 18.38 18.99
1665 NASDAQ AMPH Wed, Feb 3, 2021 18.47 18.67 18.08 18.42
1664 NASDAQ AMPH Tue, Feb 2, 2021 18.63 18.83 18.51 18.57
1663 NASDAQ AMPH Mon, Feb 1, 2021 18.23 18.58 17.97 18.46
1662 NASDAQ AMPH Fri, Jan 29, 2021 18.36 18.84 18.18 18.18
1661 NASDAQ AMPH Thu, Jan 28, 2021 18.91 19.17 18.41 18.57
1660 NASDAQ AMPH Wed, Jan 27, 2021 18.77 19.27 18.52 18.83
1659 NASDAQ AMPH Tue, Jan 26, 2021 19.19 19.24 19.08 19.12
1658 NASDAQ AMPH Mon, Jan 25, 2021 18.70 19.07 18.52 19.04
1657 NASDAQ AMPH Fri, Jan 22, 2021 18.35 18.76 18.24 18.70
1656 NASDAQ AMPH Thu, Jan 21, 2021 18.52 18.56 18.07 18.43
1655 NASDAQ AMPH Wed, Jan 20, 2021 18.62 18.68 18.31 18.53
1654 NASDAQ AMPH Tue, Jan 19, 2021 19.12 19.12 18.52 18.64
1653 NASDAQ AMPH Fri, Jan 15, 2021 19.22 19.45 18.67 18.69
1652 NASDAQ AMPH Thu, Jan 14, 2021 19.50 19.80 19.15 19.26
1651 NASDAQ AMPH Wed, Jan 13, 2021 19.72 19.97 19.31 19.39
1650 NASDAQ AMPH Tue, Jan 12, 2021 19.62 19.66 19.40 19.52
1649 NASDAQ AMPH Mon, Jan 11, 2021 19.59 20.00 19.47 19.53
1648 NASDAQ AMPH Fri, Jan 8, 2021 19.02 19.85 19.02 19.80
1647 NASDAQ AMPH Thu, Jan 7, 2021 20.10 20.93 19.73 20.65
1646 NASDAQ AMPH Wed, Jan 6, 2021 20.26 20.55 19.92 20.10
1645 NASDAQ AMPH Tue, Jan 5, 2021 20.02 20.34 19.67 20.02
1644 NASDAQ AMPH Mon, Jan 4, 2021 20.26 20.41 19.87 20.14
1643 NASDAQ AMPH Thu, Dec 31, 2020 19.93 20.19 19.84 20.11
1642 NASDAQ AMPH Wed, Dec 30, 2020 19.65 20.14 19.65 19.85
1641 NASDAQ AMPH Tue, Dec 29, 2020 20.68 20.68 19.70 19.81
1640 NASDAQ AMPH Mon, Dec 28, 2020 19.42 19.42 18.87 19.02
1639 NASDAQ AMPH Thu, Dec 24, 2020 18.96 19.35 18.96 19.14
1638 NASDAQ AMPH Wed, Dec 23, 2020 18.85 19.04 18.81 18.88
1637 NASDAQ AMPH Tue, Dec 22, 2020 18.84 19.04 18.60 18.86
1636 NASDAQ AMPH Mon, Dec 21, 2020 18.71 18.89 18.26 18.82
1635 NASDAQ AMPH Fri, Dec 18, 2020 18.28 19.14 18.20 18.96
1634 NASDAQ AMPH Thu, Dec 17, 2020 18.48 18.58 18.17 18.20
1633 NASDAQ AMPH Wed, Dec 16, 2020 18.91 18.91 18.34 18.36
1632 NASDAQ AMPH Tue, Dec 15, 2020 18.93 18.93 18.66 18.84
1631 NASDAQ AMPH Mon, Dec 14, 2020 18.93 19.18 18.82 18.85
1630 NASDAQ AMPH Fri, Dec 11, 2020 19.18 19.24 18.62 18.69
1629 NASDAQ AMPH Thu, Dec 10, 2020 18.82 19.32 18.65 19.29
1628 NASDAQ AMPH Wed, Dec 9, 2020 18.93 19.00 18.53 18.89
1627 NASDAQ AMPH Tue, Dec 8, 2020 18.42 18.86 18.37 18.81
1626 NASDAQ AMPH Mon, Dec 7, 2020 18.86 18.89 18.42 18.57
1625 NASDAQ AMPH Fri, Dec 4, 2020 18.52 19.01 18.51 18.95
1624 NASDAQ AMPH Thu, Dec 3, 2020 17.81 18.64 17.71 18.54
1623 NASDAQ AMPH Wed, Dec 2, 2020 17.82 17.90 17.59 17.82
1622 NASDAQ AMPH Tue, Dec 1, 2020 17.92 18.11 17.66 17.94
1621 NASDAQ AMPH Mon, Nov 30, 2020 18.18 18.26 17.71 17.76
1620 NASDAQ AMPH Fri, Nov 27, 2020 17.51 18.34 17.51 18.12
1619 NASDAQ AMPH Wed, Nov 25, 2020 18.05 18.05 17.51 17.87
1618 NASDAQ AMPH Tue, Nov 24, 2020 18.00 18.32 17.85 18.01
1617 NASDAQ AMPH Mon, Nov 23, 2020 18.40 18.40 17.82 17.92
1616 NASDAQ AMPH Fri, Nov 20, 2020 18.13 18.51 17.99 18.36
1615 NASDAQ AMPH Thu, Nov 19, 2020 18.56 18.75 18.22 18.32
1614 NASDAQ AMPH Wed, Nov 18, 2020 19.51 19.51 18.53 18.56
1613 NASDAQ AMPH Tue, Nov 17, 2020 19.39 19.52 19.00 19.24
1612 NASDAQ AMPH Mon, Nov 16, 2020 19.62 19.70 19.29 19.53
1611 NASDAQ AMPH Fri, Nov 13, 2020 19.26 19.54 19.15 19.37
1610 NASDAQ AMPH Thu, Nov 12, 2020 19.37 19.41 18.93 19.22
1609 NASDAQ AMPH Wed, Nov 11, 2020 19.83 19.83 19.19 19.54
1608 NASDAQ AMPH Tue, Nov 10, 2020 19.30 19.84 19.12 19.78
1607 NASDAQ AMPH Mon, Nov 9, 2020 19.78 20.45 19.01 19.01
1606 NASDAQ AMPH Fri, Nov 6, 2020 20.79 20.79 18.98 19.20
1605 NASDAQ AMPH Thu, Nov 5, 2020 20.80 21.03 20.43 20.63
1604 NASDAQ AMPH Wed, Nov 4, 2020 20.23 21.33 19.99 20.74
1603 NASDAQ AMPH Tue, Nov 3, 2020 20.15 20.44 19.99 20.37
1602 NASDAQ AMPH Mon, Nov 2, 2020 19.75 19.97 19.67 19.90
1601 NASDAQ AMPH Fri, Oct 30, 2020 20.07 20.07 19.32 19.59
1600 NASDAQ AMPH Thu, Oct 29, 2020 19.56 20.16 19.17 20.09
1599 NASDAQ AMPH Wed, Oct 28, 2020 19.26 19.70 18.78 19.54
1598 NASDAQ AMPH Tue, Oct 27, 2020 20.24 20.47 19.87 19.88
1597 NASDAQ AMPH Mon, Oct 26, 2020 20.72 20.84 20.26 20.29
1596 NASDAQ AMPH Fri, Oct 23, 2020 20.74 20.88 20.50 20.84
1595 NASDAQ AMPH Thu, Oct 22, 2020 20.46 21.00 20.26 20.59
1594 NASDAQ AMPH Wed, Oct 21, 2020 20.72 20.76 20.33 20.41
1593 NASDAQ AMPH Tue, Oct 20, 2020 21.02 21.02 20.40 20.63
1592 NASDAQ AMPH Mon, Oct 19, 2020 21.00 21.09 20.74 20.82
1591 NASDAQ AMPH Fri, Oct 16, 2020 20.94 21.38 20.91 20.96
1590 NASDAQ AMPH Thu, Oct 15, 2020 20.63 20.98 20.60 20.97
1589 NASDAQ AMPH Wed, Oct 14, 2020 21.10 21.23 20.80 20.86
1588 NASDAQ AMPH Tue, Oct 13, 2020 20.94 21.26 20.79 21.10
1587 NASDAQ AMPH Mon, Oct 12, 2020 21.24 21.33 20.86 21.23
1586 NASDAQ AMPH Fri, Oct 9, 2020 21.00 21.34 20.76 21.24
1585 NASDAQ AMPH Thu, Oct 8, 2020 20.58 21.11 20.58 20.92
1584 NASDAQ AMPH Wed, Oct 7, 2020 20.33 20.59 20.09 20.44
1583 NASDAQ AMPH Tue, Oct 6, 2020 20.33 20.57 19.86 20.21
1582 NASDAQ AMPH Mon, Oct 5, 2020 20.30 20.71 19.75 20.14
1581 NASDAQ AMPH Fri, Oct 2, 2020 18.78 19.22 18.55 19.00
1580 NASDAQ AMPH Thu, Oct 1, 2020 18.89 19.09 18.73 19.04
1579 NASDAQ AMPH Wed, Sep 30, 2020 18.72 19.00 18.57 18.75
1578 NASDAQ AMPH Tue, Sep 29, 2020 18.49 18.68 18.29 18.63
1577 NASDAQ AMPH Mon, Sep 28, 2020 18.13 18.54 18.06 18.51
1576 NASDAQ AMPH Fri, Sep 25, 2020 17.83 18.15 17.83 18.03
1575 NASDAQ AMPH Thu, Sep 24, 2020 18.18 18.20 17.86 17.99
1574 NASDAQ AMPH Wed, Sep 23, 2020 18.39 18.63 18.18 18.18
1573 NASDAQ AMPH Tue, Sep 22, 2020 18.82 18.94 18.32 18.53
1572 NASDAQ AMPH Mon, Sep 21, 2020 19.20 19.89 18.46 18.79
1571 NASDAQ AMPH Fri, Sep 18, 2020 19.59 19.86 19.37 19.57
1570 NASDAQ AMPH Thu, Sep 17, 2020 19.39 19.58 19.25 19.45
1569 NASDAQ AMPH Wed, Sep 16, 2020 19.62 19.68 19.46 19.49
1568 NASDAQ AMPH Tue, Sep 15, 2020 19.78 19.82 19.42 19.50
1567 NASDAQ AMPH Mon, Sep 14, 2020 19.62 19.79 19.35 19.65
1566 NASDAQ AMPH Fri, Sep 11, 2020 19.55 19.64 19.22 19.42
1565 NASDAQ AMPH Thu, Sep 10, 2020 20.03 20.31 19.43 19.47
1564 NASDAQ AMPH Wed, Sep 9, 2020 19.94 20.37 19.90 20.00
1563 NASDAQ AMPH Tue, Sep 8, 2020 19.85 20.38 19.61 19.81
1562 NASDAQ AMPH Fri, Sep 4, 2020 20.27 20.27 19.46 19.92
1561 NASDAQ AMPH Thu, Sep 3, 2020 20.18 20.42 20.01 20.06
1560 NASDAQ AMPH Wed, Sep 2, 2020 19.94 20.38 19.75 20.28
1559 NASDAQ AMPH Tue, Sep 1, 2020 20.31 20.45 19.62 19.80
1558 NASDAQ AMPH Mon, Aug 31, 2020 20.34 20.73 20.25 20.38
1557 NASDAQ AMPH Fri, Aug 28, 2020 20.30 20.42 20.11 20.40
1556 NASDAQ AMPH Thu, Aug 27, 2020 20.25 20.43 20.14 20.31
1555 NASDAQ AMPH Wed, Aug 26, 2020 20.19 20.41 20.07 20.30
1554 NASDAQ AMPH Tue, Aug 25, 2020 20.20 20.25 19.98 20.22
1553 NASDAQ AMPH Mon, Aug 24, 2020 20.23 20.28 20.04 20.12
1552 NASDAQ AMPH Fri, Aug 21, 2020 20.42 20.49 19.81 20.03
1551 NASDAQ AMPH Thu, Aug 20, 2020 20.44 20.59 20.33 20.42
1550 NASDAQ AMPH Wed, Aug 19, 2020 20.47 20.78 20.47 20.51
1549 NASDAQ AMPH Tue, Aug 18, 2020 20.51 20.53 20.09 20.34
1548 NASDAQ AMPH Mon, Aug 17, 2020 20.42 20.70 20.35 20.49
1547 NASDAQ AMPH Fri, Aug 14, 2020 20.38 20.50 20.09 20.34
1546 NASDAQ AMPH Thu, Aug 13, 2020 20.12 20.47 19.99 20.40
1545 NASDAQ AMPH Wed, Aug 12, 2020 20.12 20.42 20.05 20.27
1544 NASDAQ AMPH Tue, Aug 11, 2020 20.32 20.60 19.81 19.89
1543 NASDAQ AMPH Mon, Aug 10, 2020 20.23 20.80 19.90 20.32
1542 NASDAQ AMPH Fri, Aug 7, 2020 20.07 20.44 19.52 20.14
1541 NASDAQ AMPH Thu, Aug 6, 2020 21.05 21.15 19.51 20.27
1540 NASDAQ AMPH Wed, Aug 5, 2020 20.99 21.22 20.47 21.09
1539 NASDAQ AMPH Tue, Aug 4, 2020 20.77 20.88 20.45 20.85
1538 NASDAQ AMPH Mon, Aug 3, 2020 20.12 20.84 19.99 20.74
1537 NASDAQ AMPH Fri, Jul 31, 2020 20.40 20.53 19.72 20.02
1536 NASDAQ AMPH Thu, Jul 30, 2020 20.17 20.43 19.92 20.35
1535 NASDAQ AMPH Wed, Jul 29, 2020 19.99 20.49 19.91 20.29
1534 NASDAQ AMPH Tue, Jul 28, 2020 20.21 20.41 19.98 19.99
1533 NASDAQ AMPH Mon, Jul 27, 2020 19.99 20.25 19.94 20.20
1532 NASDAQ AMPH Fri, Jul 24, 2020 20.39 20.39 19.90 19.98
1531 NASDAQ AMPH Thu, Jul 23, 2020 20.62 20.81 20.34 20.39
1530 NASDAQ AMPH Wed, Jul 22, 2020 21.24 21.26 20.55 20.63
1529 NASDAQ AMPH Tue, Jul 21, 2020 21.05 21.45 20.89 21.23
1528 NASDAQ AMPH Mon, Jul 20, 2020 21.19 21.19 20.78 20.93
1527 NASDAQ AMPH Fri, Jul 17, 2020 20.67 21.28 20.67 21.25
1526 NASDAQ AMPH Thu, Jul 16, 2020 20.64 20.71 20.29 20.69
1525 NASDAQ AMPH Wed, Jul 15, 2020 20.72 20.85 20.45 20.69
1524 NASDAQ AMPH Tue, Jul 14, 2020 19.79 20.27 19.79 20.27
1523 NASDAQ AMPH Mon, Jul 13, 2020 20.51 20.94 19.74 19.75
1522 NASDAQ AMPH Fri, Jul 10, 2020 20.80 20.92 20.19 20.34
1521 NASDAQ AMPH Thu, Jul 9, 2020 21.09 21.23 20.59 20.82
1520 NASDAQ AMPH Wed, Jul 8, 2020 21.60 21.72 21.35 21.50
1519 NASDAQ AMPH Tue, Jul 7, 2020 21.85 21.90 21.46 21.56
1518 NASDAQ AMPH Mon, Jul 6, 2020 22.00 22.31 21.78 21.98
1517 NASDAQ AMPH Thu, Jul 2, 2020 22.58 22.58 21.85 21.92
1516 NASDAQ AMPH Wed, Jul 1, 2020 22.60 22.69 22.15 22.22
1515 NASDAQ AMPH Tue, Jun 30, 2020 22.04 22.50 21.82 22.46
1514 NASDAQ AMPH Mon, Jun 29, 2020 21.82 22.33 21.55 22.12
1513 NASDAQ AMPH Fri, Jun 26, 2020 21.77 21.81 21.27 21.57
1512 NASDAQ AMPH Thu, Jun 25, 2020 21.32 21.91 21.08 21.85
1511 NASDAQ AMPH Wed, Jun 24, 2020 21.32 21.54 21.16 21.31
1510 NASDAQ AMPH Tue, Jun 23, 2020 21.36 21.93 21.36 21.54
1509 NASDAQ AMPH Mon, Jun 22, 2020 20.95 21.36 20.82 21.34
1508 NASDAQ AMPH Fri, Jun 19, 2020 20.50 21.01 20.24 21.01
1507 NASDAQ AMPH Thu, Jun 18, 2020 19.93 20.37 19.93 20.30
1506 NASDAQ AMPH Wed, Jun 17, 2020 20.28 20.38 19.92 20.02
1505 NASDAQ AMPH Tue, Jun 16, 2020 20.41 20.47 19.69 20.20
1504 NASDAQ AMPH Mon, Jun 15, 2020 19.24 19.96 19.24 19.94
1503 NASDAQ AMPH Fri, Jun 12, 2020 20.10 20.28 19.28 19.58
1502 NASDAQ AMPH Thu, Jun 11, 2020 19.58 19.79 19.39 19.65
1501 NASDAQ AMPH Wed, Jun 10, 2020 20.58 20.70 19.84 20.12
1500 NASDAQ AMPH Tue, Jun 9, 2020 20.29 20.71 19.80 20.55
1499 NASDAQ AMPH Mon, Jun 8, 2020 19.60 20.29 19.52 20.08
1498 NASDAQ AMPH Fri, Jun 5, 2020 19.30 19.88 19.16 19.52
1497 NASDAQ AMPH Thu, Jun 4, 2020 18.85 19.19 18.62 19.19
1496 NASDAQ AMPH Wed, Jun 3, 2020 18.86 19.14 18.68 18.92
1495 NASDAQ AMPH Tue, Jun 2, 2020 19.10 19.14 18.65 18.84
1494 NASDAQ AMPH Mon, Jun 1, 2020 18.61 19.28 18.56 19.05
1493 NASDAQ AMPH Fri, May 29, 2020 18.53 18.73 18.28 18.64
1492 NASDAQ AMPH Thu, May 28, 2020 18.94 19.18 18.42 18.62
1491 NASDAQ AMPH Wed, May 27, 2020 18.65 18.85 18.02 18.79
1490 NASDAQ AMPH Tue, May 26, 2020 18.96 18.99 18.42 18.49
1489 NASDAQ AMPH Fri, May 22, 2020 18.57 18.61 18.03 18.54
1488 NASDAQ AMPH Thu, May 21, 2020 18.31 18.65 18.13 18.47
1487 NASDAQ AMPH Wed, May 20, 2020 19.06 19.09 18.26 18.36
1486 NASDAQ AMPH Tue, May 19, 2020 18.86 19.15 18.48 18.77
1485 NASDAQ AMPH Mon, May 18, 2020 18.64 19.38 18.58 18.84
1484 NASDAQ AMPH Fri, May 15, 2020 17.94 18.47 17.91 18.18
1483 NASDAQ AMPH Thu, May 14, 2020 18.12 18.31 17.57 17.98
1482 NASDAQ AMPH Wed, May 13, 2020 18.53 18.94 18.18 18.50
1481 NASDAQ AMPH Tue, May 12, 2020 19.16 19.47 18.47 18.53
1480 NASDAQ AMPH Mon, May 11, 2020 18.80 19.72 18.80 19.18
1479 NASDAQ AMPH Fri, May 8, 2020 18.47 19.36 17.90 18.79
1478 NASDAQ AMPH Thu, May 7, 2020 17.60 17.79 17.23 17.60
1477 NASDAQ AMPH Wed, May 6, 2020 17.26 17.53 17.23 17.33
1476 NASDAQ AMPH Tue, May 5, 2020 17.57 17.79 17.12 17.22
1475 NASDAQ AMPH Mon, May 4, 2020 16.82 17.40 16.54 17.25
1474 NASDAQ AMPH Fri, May 1, 2020 17.03 17.03 16.40 16.82
1473 NASDAQ AMPH Thu, Apr 30, 2020 17.22 17.38 16.86 16.95
1472 NASDAQ AMPH Wed, Apr 29, 2020 17.51 17.82 17.07 17.44
1471 NASDAQ AMPH Tue, Apr 28, 2020 18.39 18.39 17.08 17.12
1470 NASDAQ AMPH Mon, Apr 27, 2020 17.08 18.06 17.01 17.98
1469 NASDAQ AMPH Fri, Apr 24, 2020 16.70 16.80 16.46 16.73
1468 NASDAQ AMPH Thu, Apr 23, 2020 16.49 17.00 16.30 16.56
1467 NASDAQ AMPH Wed, Apr 22, 2020 16.09 16.53 16.06 16.40
1466 NASDAQ AMPH Tue, Apr 21, 2020 16.25 16.47 15.79 16.01
1465 NASDAQ AMPH Mon, Apr 20, 2020 16.13 16.94 16.13 16.61
1464 NASDAQ AMPH Fri, Apr 17, 2020 16.50 16.59 16.17 16.34
1463 NASDAQ AMPH Thu, Apr 16, 2020 16.28 16.46 15.56 15.99
1462 NASDAQ AMPH Wed, Apr 15, 2020 16.08 16.45 15.50 16.19
1461 NASDAQ AMPH Tue, Apr 14, 2020 16.56 16.58 15.90 16.42
1460 NASDAQ AMPH Mon, Apr 13, 2020 16.37 16.40 15.99 16.33
1459 NASDAQ AMPH Thu, Apr 9, 2020 16.00 16.54 15.75 16.47
1458 NASDAQ AMPH Wed, Apr 8, 2020 14.98 15.95 14.84 15.88
1457 NASDAQ AMPH Tue, Apr 7, 2020 15.88 16.13 14.77 14.91
1456 NASDAQ AMPH Mon, Apr 6, 2020 15.18 15.78 14.83 15.61
1455 NASDAQ AMPH Fri, Apr 3, 2020 14.64 14.96 14.22 14.78
1454 NASDAQ AMPH Thu, Apr 2, 2020 14.13 15.30 14.00 14.77
1453 NASDAQ AMPH Wed, Apr 1, 2020 14.32 14.72 14.06 14.25
1452 NASDAQ AMPH Tue, Mar 31, 2020 15.06 15.32 14.46 14.84
1451 NASDAQ AMPH Mon, Mar 30, 2020 14.18 15.34 14.08 15.12
1450 NASDAQ AMPH Fri, Mar 27, 2020 13.86 14.43 13.51 14.06
1449 NASDAQ AMPH Thu, Mar 26, 2020 13.07 14.43 13.07 14.38
1448 NASDAQ AMPH Wed, Mar 25, 2020 13.62 13.71 13.04 13.10
1447 NASDAQ AMPH Tue, Mar 24, 2020 13.72 13.98 13.37 13.68
1446 NASDAQ AMPH Mon, Mar 23, 2020 12.83 13.54 12.66 13.19
1445 NASDAQ AMPH Fri, Mar 20, 2020 13.45 14.21 12.60 12.66
1444 NASDAQ AMPH Thu, Mar 19, 2020 12.76 13.50 12.33 13.35
1443 NASDAQ AMPH Wed, Mar 18, 2020 13.68 14.54 12.77 12.78
1442 NASDAQ AMPH Tue, Mar 17, 2020 13.17 14.55 12.90 14.50
1441 NASDAQ AMPH Mon, Mar 16, 2020 13.09 13.98 12.90 13.03
1440 NASDAQ AMPH Fri, Mar 13, 2020 13.76 14.73 13.09 14.19
1439 NASDAQ AMPH Thu, Mar 12, 2020 14.50 14.68 13.75 13.87
1438 NASDAQ AMPH Wed, Mar 11, 2020 15.04 15.41 14.91 15.30
1437 NASDAQ AMPH Tue, Mar 10, 2020 14.86 15.39 14.64 15.39
1436 NASDAQ AMPH Mon, Mar 9, 2020 14.79 15.28 14.52 14.56
1435 NASDAQ AMPH Fri, Mar 6, 2020 15.31 15.40 14.89 15.33
1434 NASDAQ AMPH Thu, Mar 5, 2020 16.11 16.33 15.59 15.71
1433 NASDAQ AMPH Wed, Mar 4, 2020 15.94 16.39 15.54 16.35
1432 NASDAQ AMPH Tue, Mar 3, 2020 15.81 16.28 15.36 15.73
1431 NASDAQ AMPH Mon, Mar 2, 2020 15.56 15.89 15.40 15.85
1430 NASDAQ AMPH Fri, Feb 28, 2020 16.30 16.57 15.18 15.39
1429 NASDAQ AMPH Thu, Feb 27, 2020 17.02 17.48 16.54 16.96
1428 NASDAQ AMPH Wed, Feb 26, 2020 17.42 17.58 17.18 17.28
1427 NASDAQ AMPH Tue, Feb 25, 2020 17.58 17.77 17.24 17.32
1426 NASDAQ AMPH Mon, Feb 24, 2020 17.84 17.84 17.48 17.58
1425 NASDAQ AMPH Fri, Feb 21, 2020 18.40 18.41 18.11 18.28
1424 NASDAQ AMPH Thu, Feb 20, 2020 18.98 19.10 18.14 18.47
1423 NASDAQ AMPH Wed, Feb 19, 2020 18.82 19.04 18.71 19.02
1422 NASDAQ AMPH Tue, Feb 18, 2020 19.08 19.20 18.70 18.81
1421 NASDAQ AMPH Fri, Feb 14, 2020 19.29 19.29 19.06 19.17
1420 NASDAQ AMPH Thu, Feb 13, 2020 19.92 20.03 19.28 19.29
1419 NASDAQ AMPH Wed, Feb 12, 2020 20.06 20.06 19.87 19.99
1418 NASDAQ AMPH Tue, Feb 11, 2020 19.92 20.19 19.85 19.97
1417 NASDAQ AMPH Mon, Feb 10, 2020 19.90 20.12 19.84 19.86
1416 NASDAQ AMPH Fri, Feb 7, 2020 19.91 20.01 19.79 19.92
1415 NASDAQ AMPH Thu, Feb 6, 2020 19.66 20.00 19.58 19.95
1414 NASDAQ AMPH Wed, Feb 5, 2020 19.36 19.83 19.35 19.60
1413 NASDAQ AMPH Tue, Feb 4, 2020 19.26 19.42 19.22 19.26
1412 NASDAQ AMPH Mon, Feb 3, 2020 19.02 19.25 18.99 19.12
1411 NASDAQ AMPH Fri, Jan 31, 2020 19.27 19.41 18.75 18.91
1410 NASDAQ AMPH Thu, Jan 30, 2020 19.82 19.99 19.23 19.34
1409 NASDAQ AMPH Wed, Jan 29, 2020 19.70 20.08 19.69 19.96
1408 NASDAQ AMPH Tue, Jan 28, 2020 19.78 19.99 19.63 19.72
1407 NASDAQ AMPH Mon, Jan 27, 2020 19.32 19.84 19.32 19.68
1406 NASDAQ AMPH Fri, Jan 24, 2020 20.07 20.07 19.49 19.64
1405 NASDAQ AMPH Thu, Jan 23, 2020 20.03 20.10 19.87 20.07
1404 NASDAQ AMPH Wed, Jan 22, 2020 20.17 20.20 19.92 20.00
1403 NASDAQ AMPH Tue, Jan 21, 2020 19.96 20.30 19.93 19.99
1402 NASDAQ AMPH Fri, Jan 17, 2020 20.24 20.24 19.94 20.08
1401 NASDAQ AMPH Thu, Jan 16, 2020 19.90 20.40 19.90 20.08
1400 NASDAQ AMPH Wed, Jan 15, 2020 19.07 20.18 19.07 20.03
1399 NASDAQ AMPH Tue, Jan 14, 2020 18.69 19.25 18.65 19.07
1398 NASDAQ AMPH Mon, Jan 13, 2020 18.63 18.81 18.38 18.79
1397 NASDAQ AMPH Fri, Jan 10, 2020 18.71 18.89 18.58 18.66
1396 NASDAQ AMPH Thu, Jan 9, 2020 18.79 18.97 18.68 18.71
1395 NASDAQ AMPH Wed, Jan 8, 2020 18.44 18.69 18.18 18.61
1394 NASDAQ AMPH Tue, Jan 7, 2020 18.51 18.58 18.24 18.42
1393 NASDAQ AMPH Mon, Jan 6, 2020 18.81 18.81 18.32 18.54
1392 NASDAQ AMPH Fri, Jan 3, 2020 19.11 19.19 18.87 18.89
1391 NASDAQ AMPH Thu, Jan 2, 2020 19.44 19.50 19.05 19.35
1390 NASDAQ AMPH Tue, Dec 31, 2019 19.16 19.39 19.09 19.29
1389 NASDAQ AMPH Mon, Dec 30, 2019 19.23 19.39 19.10 19.22
1388 NASDAQ AMPH Fri, Dec 27, 2019 19.52 19.65 19.14 19.20
1387 NASDAQ AMPH Thu, Dec 26, 2019 19.63 19.77 19.40 19.45
1386 NASDAQ AMPH Tue, Dec 24, 2019 19.51 19.66 19.37 19.64
1385 NASDAQ AMPH Mon, Dec 23, 2019 19.64 19.69 19.41 19.45
1384 NASDAQ AMPH Fri, Dec 20, 2019 19.68 19.79 19.47 19.62
1383 NASDAQ AMPH Thu, Dec 19, 2019 19.13 19.67 18.94 19.62
1382 NASDAQ AMPH Wed, Dec 18, 2019 19.39 19.43 19.05 19.12
1381 NASDAQ AMPH Tue, Dec 17, 2019 19.38 19.43 19.20 19.37
1380 NASDAQ AMPH Mon, Dec 16, 2019 19.49 19.76 19.31 19.34
1379 NASDAQ AMPH Fri, Dec 13, 2019 19.52 19.59 19.29 19.33
1378 NASDAQ AMPH Thu, Dec 12, 2019 19.39 19.80 19.39 19.48
1377 NASDAQ AMPH Wed, Dec 11, 2019 19.17 19.46 19.16 19.38
1376 NASDAQ AMPH Tue, Dec 10, 2019 19.16 19.27 18.94 19.20
1375 NASDAQ AMPH Mon, Dec 9, 2019 18.93 19.24 18.63 19.15
1374 NASDAQ AMPH Fri, Dec 6, 2019 19.04 19.26 18.77 18.92
1373 NASDAQ AMPH Thu, Dec 5, 2019 18.98 19.14 18.76 19.03
1372 NASDAQ AMPH Wed, Dec 4, 2019 19.13 19.29 18.75 18.98
1371 NASDAQ AMPH Tue, Dec 3, 2019 18.90 19.17 18.68 19.03
1370 NASDAQ AMPH Mon, Dec 2, 2019 19.49 19.57 19.02 19.04
1369 NASDAQ AMPH Fri, Nov 29, 2019 18.97 19.63 18.93 19.51
1368 NASDAQ AMPH Wed, Nov 27, 2019 18.36 18.69 18.31 18.64
1367 NASDAQ AMPH Tue, Nov 26, 2019 18.69 18.89 18.17 18.27
1366 NASDAQ AMPH Mon, Nov 25, 2019 18.14 18.85 18.14 18.74
1365 NASDAQ AMPH Fri, Nov 22, 2019 18.09 18.34 18.00 18.01
1364 NASDAQ AMPH Thu, Nov 21, 2019 18.12 18.16 17.81 18.04
1363 NASDAQ AMPH Wed, Nov 20, 2019 18.04 18.46 17.93 18.07
1362 NASDAQ AMPH Tue, Nov 19, 2019 17.56 18.26 17.52 18.25
1361 NASDAQ AMPH Mon, Nov 18, 2019 17.23 17.60 17.22 17.58
1360 NASDAQ AMPH Fri, Nov 15, 2019 17.14 17.33 16.92 17.22
1359 NASDAQ AMPH Thu, Nov 14, 2019 17.20 17.20 16.92 17.07
1358 NASDAQ AMPH Wed, Nov 13, 2019 17.40 17.64 17.22 17.25
1357 NASDAQ AMPH Tue, Nov 12, 2019 17.37 17.80 16.71 17.63
1356 NASDAQ AMPH Mon, Nov 11, 2019 18.19 18.19 17.08 17.35
1355 NASDAQ AMPH Fri, Nov 8, 2019 19.10 19.42 16.92 18.41
1354 NASDAQ AMPH Thu, Nov 7, 2019 19.20 19.39 19.03 19.12
1353 NASDAQ AMPH Wed, Nov 6, 2019 19.41 19.56 19.01 19.08
1352 NASDAQ AMPH Tue, Nov 5, 2019 19.44 19.71 19.42 19.44
1351 NASDAQ AMPH Mon, Nov 4, 2019 19.67 19.74 19.35 19.38
1350 NASDAQ AMPH Fri, Nov 1, 2019 19.40 19.72 19.30 19.56
1349 NASDAQ AMPH Thu, Oct 31, 2019 19.53 19.67 19.23 19.32
1348 NASDAQ AMPH Wed, Oct 30, 2019 19.99 20.03 19.60 19.64
1347 NASDAQ AMPH Tue, Oct 29, 2019 19.69 20.28 19.48 19.96
1346 NASDAQ AMPH Mon, Oct 28, 2019 19.52 19.98 19.52 19.65
1345 NASDAQ AMPH Fri, Oct 25, 2019 19.43 19.72 19.43 19.52
1344 NASDAQ AMPH Thu, Oct 24, 2019 19.96 20.00 19.50 19.53
1343 NASDAQ AMPH Wed, Oct 23, 2019 19.91 20.10 19.80 19.95
1342 NASDAQ AMPH Tue, Oct 22, 2019 20.03 20.20 19.89 19.96
1341 NASDAQ AMPH Mon, Oct 21, 2019 20.01 20.12 19.70 19.99
1340 NASDAQ AMPH Fri, Oct 18, 2019 20.41 20.71 19.91 19.93
1339 NASDAQ AMPH Thu, Oct 17, 2019 20.74 20.86 20.46 20.52
1338 NASDAQ AMPH Wed, Oct 16, 2019 20.44 20.89 20.41 20.64
1337 NASDAQ AMPH Tue, Oct 15, 2019 20.18 20.81 20.18 20.46
1336 NASDAQ AMPH Mon, Oct 14, 2019 19.78 20.36 19.70 20.16
1335 NASDAQ AMPH Fri, Oct 11, 2019 19.78 20.10 19.59 19.77
1334 NASDAQ AMPH Thu, Oct 10, 2019 19.69 19.77 19.47 19.58
1333 NASDAQ AMPH Wed, Oct 9, 2019 19.87 19.98 19.58 19.67
1332 NASDAQ AMPH Tue, Oct 8, 2019 19.79 20.00 19.59 19.75
1331 NASDAQ AMPH Mon, Oct 7, 2019 19.74 20.07 19.70 19.92
1330 NASDAQ AMPH Fri, Oct 4, 2019 19.64 19.91 19.34 19.79
1329 NASDAQ AMPH Thu, Oct 3, 2019 19.21 19.70 19.02 19.62
1328 NASDAQ AMPH Wed, Oct 2, 2019 19.60 19.63 19.21 19.23
1327 NASDAQ AMPH Tue, Oct 1, 2019 19.87 20.18 19.60 19.65
1326 NASDAQ AMPH Mon, Sep 30, 2019 20.34 20.45 19.81 19.83
1325 NASDAQ AMPH Fri, Sep 27, 2019 20.18 20.46 19.98 20.22
1324 NASDAQ AMPH Thu, Sep 26, 2019 20.41 20.60 19.93 20.06
1323 NASDAQ AMPH Wed, Sep 25, 2019 20.27 20.66 20.03 20.40
1322 NASDAQ AMPH Tue, Sep 24, 2019 20.53 20.63 20.19 20.23
1321 NASDAQ AMPH Mon, Sep 23, 2019 20.65 20.87 20.35 20.43
1320 NASDAQ AMPH Fri, Sep 20, 2019 21.01 21.21 20.57 20.73
1319 NASDAQ AMPH Thu, Sep 19, 2019 21.23 21.45 20.96 20.97
1318 NASDAQ AMPH Wed, Sep 18, 2019 21.75 21.76 21.10 21.22
1317 NASDAQ AMPH Tue, Sep 17, 2019 21.81 22.01 21.58 21.74
1316 NASDAQ AMPH Mon, Sep 16, 2019 21.49 22.03 21.45 21.81
1315 NASDAQ AMPH Fri, Sep 13, 2019 21.72 21.98 21.36 21.52
1314 NASDAQ AMPH Thu, Sep 12, 2019 20.90 21.75 20.87 21.62
1313 NASDAQ AMPH Wed, Sep 11, 2019 21.99 22.28 21.82 22.15
1312 NASDAQ AMPH Tue, Sep 10, 2019 21.22 21.98 20.80 21.95
1311 NASDAQ AMPH Mon, Sep 9, 2019 21.75 21.75 21.04 21.29
1310 NASDAQ AMPH Fri, Sep 6, 2019 21.36 22.02 21.27 21.62
1309 NASDAQ AMPH Thu, Sep 5, 2019 21.92 21.92 21.02 21.24
1308 NASDAQ AMPH Wed, Sep 4, 2019 22.17 22.32 21.59 21.72
1307 NASDAQ AMPH Tue, Sep 3, 2019 22.28 22.70 21.85 21.95
1306 NASDAQ AMPH Fri, Aug 30, 2019 22.32 22.58 22.16 22.46
1305 NASDAQ AMPH Thu, Aug 29, 2019 21.88 22.06 21.84 22.00
1304 NASDAQ AMPH Wed, Aug 28, 2019 21.91 22.00 21.60 21.69
1303 NASDAQ AMPH Tue, Aug 27, 2019 22.55 22.74 21.84 21.85
1302 NASDAQ AMPH Mon, Aug 26, 2019 22.38 22.85 22.18 22.50
1301 NASDAQ AMPH Fri, Aug 23, 2019 22.56 22.68 22.13 22.24
1300 NASDAQ AMPH Thu, Aug 22, 2019 22.68 22.68 22.19 22.56
1299 NASDAQ AMPH Wed, Aug 21, 2019 22.32 22.63 22.21 22.62
1298 NASDAQ AMPH Tue, Aug 20, 2019 21.91 22.29 21.91 22.19
1297 NASDAQ AMPH Mon, Aug 19, 2019 21.51 22.20 21.45 22.11
1296 NASDAQ AMPH Fri, Aug 16, 2019 21.14 21.52 20.76 21.38
1295 NASDAQ AMPH Thu, Aug 15, 2019 20.93 21.18 20.63 20.90
1294 NASDAQ AMPH Wed, Aug 14, 2019 20.68 20.92 20.35 20.85
1293 NASDAQ AMPH Tue, Aug 13, 2019 20.60 21.19 20.60 20.85
1292 NASDAQ AMPH Mon, Aug 12, 2019 20.62 20.66 20.07 20.64
1291 NASDAQ AMPH Fri, Aug 9, 2019 20.83 21.09 20.39 20.64
1290 NASDAQ AMPH Thu, Aug 8, 2019 20.98 21.17 19.72 21.07
1289 NASDAQ AMPH Wed, Aug 7, 2019 19.22 19.85 19.10 19.69
1288 NASDAQ AMPH Tue, Aug 6, 2019 19.51 19.71 19.18 19.57
1287 NASDAQ AMPH Mon, Aug 5, 2019 19.53 20.24 19.09 19.36
1286 NASDAQ AMPH Fri, Aug 2, 2019 19.99 20.11 19.50 19.87
1285 NASDAQ AMPH Thu, Aug 1, 2019 20.12 20.43 19.78 20.07
1284 NASDAQ AMPH Wed, Jul 31, 2019 20.36 20.61 20.06 20.15
1283 NASDAQ AMPH Tue, Jul 30, 2019 19.88 20.42 19.71 20.32
1282 NASDAQ AMPH Mon, Jul 29, 2019 19.79 19.95 19.62 19.91
1281 NASDAQ AMPH Fri, Jul 26, 2019 19.84 19.91 19.48 19.72
1280 NASDAQ AMPH Thu, Jul 25, 2019 19.63 19.89 19.07 19.81
1279 NASDAQ AMPH Wed, Jul 24, 2019 19.03 19.57 18.66 19.56
1278 NASDAQ AMPH Tue, Jul 23, 2019 19.30 19.34 19.00 19.12
1277 NASDAQ AMPH Mon, Jul 22, 2019 19.40 19.53 19.22 19.23
1276 NASDAQ AMPH Fri, Jul 19, 2019 19.88 19.94 19.36 19.38
1275 NASDAQ AMPH Thu, Jul 18, 2019 20.00 20.12 19.83 19.95
1274 NASDAQ AMPH Wed, Jul 17, 2019 20.11 20.11 19.78 20.03
1273 NASDAQ AMPH Tue, Jul 16, 2019 20.18 20.51 20.08 20.09
1272 NASDAQ AMPH Mon, Jul 15, 2019 20.04 20.27 20.00 20.19
1271 NASDAQ AMPH Fri, Jul 12, 2019 19.97 20.32 19.93 20.20
1270 NASDAQ AMPH Thu, Jul 11, 2019 20.40 20.40 19.69 20.01
1269 NASDAQ AMPH Wed, Jul 10, 2019 20.34 20.48 20.15 20.42
1268 NASDAQ AMPH Tue, Jul 9, 2019 20.24 20.58 19.61 20.29
1267 NASDAQ AMPH Mon, Jul 8, 2019 20.81 20.86 20.16 20.33
1266 NASDAQ AMPH Fri, Jul 5, 2019 21.06 21.10 20.75 20.88
1265 NASDAQ AMPH Wed, Jul 3, 2019 21.15 21.22 20.54 21.13
1264 NASDAQ AMPH Tue, Jul 2, 2019 21.41 21.49 20.75 21.08
1263 NASDAQ AMPH Mon, Jul 1, 2019 21.34 21.57 20.90 21.43
1262 NASDAQ AMPH Fri, Jun 28, 2019 20.83 21.21 20.77 21.11
1261 NASDAQ AMPH Thu, Jun 27, 2019 20.51 20.86 20.51 20.85
1260 NASDAQ AMPH Wed, Jun 26, 2019 20.49 20.65 20.19 20.43
1259 NASDAQ AMPH Tue, Jun 25, 2019 20.36 20.73 20.31 20.47
1258 NASDAQ AMPH Mon, Jun 24, 2019 20.63 20.83 20.17 20.22
1257 NASDAQ AMPH Fri, Jun 21, 2019 20.70 20.76 20.31 20.64
1256 NASDAQ AMPH Thu, Jun 20, 2019 20.98 21.30 20.74 20.81
1255 NASDAQ AMPH Wed, Jun 19, 2019 20.60 20.84 20.50 20.82
1254 NASDAQ AMPH Tue, Jun 18, 2019 20.40 21.10 20.40 20.56
1253 NASDAQ AMPH Mon, Jun 17, 2019 19.94 20.65 19.90 20.27
1252 NASDAQ AMPH Fri, Jun 14, 2019 19.97 20.05 19.75 19.82
1251 NASDAQ AMPH Thu, Jun 13, 2019 20.08 20.14 19.72 20.00
1250 NASDAQ AMPH Wed, Jun 12, 2019 19.44 20.07 19.44 20.03
1249 NASDAQ AMPH Tue, Jun 11, 2019 20.25 20.35 19.49 19.55
1248 NASDAQ AMPH Mon, Jun 10, 2019 20.12 20.29 20.05 20.17
1247 NASDAQ AMPH Fri, Jun 7, 2019 20.05 20.21 19.89 20.11
1246 NASDAQ AMPH Thu, Jun 6, 2019 19.73 20.20 19.71 20.11
1245 NASDAQ AMPH Wed, Jun 5, 2019 19.80 19.86 19.34 19.71
1244 NASDAQ AMPH Tue, Jun 4, 2019 18.99 19.74 18.60 19.65
1243 NASDAQ AMPH Mon, Jun 3, 2019 19.30 19.51 18.61 18.92
1242 NASDAQ AMPH Fri, May 31, 2019 19.65 19.80 18.95 19.25
1241 NASDAQ AMPH Thu, May 30, 2019 20.27 20.44 19.72 19.87
1240 NASDAQ AMPH Wed, May 29, 2019 20.43 20.55 19.86 20.18
1239 NASDAQ AMPH Tue, May 28, 2019 21.19 21.32 20.48 20.50
1238 NASDAQ AMPH Fri, May 24, 2019 21.11 21.34 20.87 21.21
1237 NASDAQ AMPH Thu, May 23, 2019 21.01 21.24 20.62 20.90
1236 NASDAQ AMPH Wed, May 22, 2019 21.47 21.61 21.00 21.17
1235 NASDAQ AMPH Tue, May 21, 2019 21.40 21.66 21.13 21.47
1234 NASDAQ AMPH Mon, May 20, 2019 21.92 21.92 21.28 21.32
1233 NASDAQ AMPH Fri, May 17, 2019 22.21 22.37 21.91 21.92
1232 NASDAQ AMPH Thu, May 16, 2019 21.47 22.79 21.47 22.28
1231 NASDAQ AMPH Wed, May 15, 2019 20.84 21.29 20.78 21.21
1230 NASDAQ AMPH Tue, May 14, 2019 20.92 21.17 20.57 21.01
1229 NASDAQ AMPH Mon, May 13, 2019 22.03 22.14 20.77 20.88
1228 NASDAQ AMPH Fri, May 10, 2019 22.64 22.92 22.11 22.41
1227 NASDAQ AMPH Thu, May 9, 2019 22.43 22.85 22.11 22.63
1226 NASDAQ AMPH Wed, May 8, 2019 22.36 22.77 22.07 22.51
1225 NASDAQ AMPH Tue, May 7, 2019 22.81 22.81 22.13 22.29
1224 NASDAQ AMPH Mon, May 6, 2019 22.11 23.06 22.11 22.96
1223 NASDAQ AMPH Fri, May 3, 2019 21.92 22.38 21.92 22.35
1222 NASDAQ AMPH Thu, May 2, 2019 21.59 21.93 21.48 21.92
1221 NASDAQ AMPH Wed, May 1, 2019 21.58 22.04 21.43 21.65
1220 NASDAQ AMPH Tue, Apr 30, 2019 21.86 21.86 21.22 21.59
1219 NASDAQ AMPH Mon, Apr 29, 2019 21.65 21.84 21.50 21.77
1218 NASDAQ AMPH Fri, Apr 26, 2019 21.35 21.71 21.06 21.59
1217 NASDAQ AMPH Thu, Apr 25, 2019 20.81 21.44 20.72 21.33
1216 NASDAQ AMPH Wed, Apr 24, 2019 20.79 21.05 20.60 20.81
1215 NASDAQ AMPH Tue, Apr 23, 2019 20.49 20.99 20.48 20.80
1214 NASDAQ AMPH Mon, Apr 22, 2019 20.08 20.48 20.08 20.45
1213 NASDAQ AMPH Thu, Apr 18, 2019 19.80 20.27 19.80 20.16
1212 NASDAQ AMPH Wed, Apr 17, 2019 20.61 20.65 19.62 19.92
1211 NASDAQ AMPH Tue, Apr 16, 2019 20.89 20.98 20.49 20.58
1210 NASDAQ AMPH Mon, Apr 15, 2019 20.71 20.83 20.52 20.80
1209 NASDAQ AMPH Fri, Apr 12, 2019 20.95 21.22 20.64 20.72
1208 NASDAQ AMPH Thu, Apr 11, 2019 21.04 21.30 20.72 20.97
1207 NASDAQ AMPH Wed, Apr 10, 2019 21.03 21.17 20.82 21.04
1206 NASDAQ AMPH Tue, Apr 9, 2019 21.23 21.29 20.94 20.95
1205 NASDAQ AMPH Mon, Apr 8, 2019 21.31 21.38 21.08 21.35
1204 NASDAQ AMPH Fri, Apr 5, 2019 21.38 21.68 21.30 21.39
1203 NASDAQ AMPH Thu, Apr 4, 2019 20.91 21.39 20.72 21.31
1202 NASDAQ AMPH Wed, Apr 3, 2019 21.37 21.57 20.77 20.90
1201 NASDAQ AMPH Tue, Apr 2, 2019 21.05 21.68 21.05 21.34
1200 NASDAQ AMPH Mon, Apr 1, 2019 20.56 21.06 20.42 21.05
1199 NASDAQ AMPH Fri, Mar 29, 2019 20.43 20.61 20.36 20.43
1198 NASDAQ AMPH Thu, Mar 28, 2019 20.58 20.70 20.40 20.44
1197 NASDAQ AMPH Wed, Mar 27, 2019 20.52 20.77 20.32 20.52
1196 NASDAQ AMPH Tue, Mar 26, 2019 20.53 20.84 20.49 20.54
1195 NASDAQ AMPH Mon, Mar 25, 2019 20.16 20.73 20.14 20.44
1194 NASDAQ AMPH Fri, Mar 22, 2019 20.76 21.00 20.03 20.16
1193 NASDAQ AMPH Thu, Mar 21, 2019 20.76 21.27 20.72 20.81
1192 NASDAQ AMPH Wed, Mar 20, 2019 20.62 21.24 20.44 20.94
1191 NASDAQ AMPH Tue, Mar 19, 2019 20.57 20.76 20.49 20.61
1190 NASDAQ AMPH Mon, Mar 18, 2019 20.23 20.57 20.23 20.37
1189 NASDAQ AMPH Fri, Mar 15, 2019 20.55 20.80 20.12 20.23
1188 NASDAQ AMPH Thu, Mar 14, 2019 20.64 20.70 19.70 20.50
1187 NASDAQ AMPH Wed, Mar 13, 2019 21.50 22.54 20.35 20.68
1186 NASDAQ AMPH Tue, Mar 12, 2019 23.74 24.40 23.61 24.17
1185 NASDAQ AMPH Mon, Mar 11, 2019 23.79 24.01 23.39 23.72
1184 NASDAQ AMPH Fri, Mar 8, 2019 23.70 24.00 23.65 23.81
1183 NASDAQ AMPH Thu, Mar 7, 2019 24.10 24.44 23.71 23.83
1182 NASDAQ AMPH Wed, Mar 6, 2019 24.77 24.77 24.05 24.17
1181 NASDAQ AMPH Tue, Mar 5, 2019 24.76 25.13 24.41 24.73
1180 NASDAQ AMPH Mon, Mar 4, 2019 25.32 25.43 24.63 24.73
1179 NASDAQ AMPH Fri, Mar 1, 2019 24.95 25.34 24.66 25.28
1178 NASDAQ AMPH Thu, Feb 28, 2019 24.38 24.90 24.38 24.85
1177 NASDAQ AMPH Wed, Feb 27, 2019 24.14 24.59 23.96 24.51
1176 NASDAQ AMPH Tue, Feb 26, 2019 23.78 24.32 23.73 24.18
1175 NASDAQ AMPH Mon, Feb 25, 2019 24.14 24.26 23.80 23.90
1174 NASDAQ AMPH Fri, Feb 22, 2019 23.93 24.29 23.76 24.14
1173 NASDAQ AMPH Thu, Feb 21, 2019 24.57 24.62 24.08 24.19
1172 NASDAQ AMPH Wed, Feb 20, 2019 24.29 24.63 24.11 24.61
1171 NASDAQ AMPH Tue, Feb 19, 2019 24.40 24.49 24.04 24.31
1170 NASDAQ AMPH Fri, Feb 15, 2019 23.86 24.47 23.65 24.38
1169 NASDAQ AMPH Thu, Feb 14, 2019 23.86 24.19 23.83 23.85
1168 NASDAQ AMPH Wed, Feb 13, 2019 23.80 23.91 23.68 23.83
1167 NASDAQ AMPH Tue, Feb 12, 2019 23.38 23.87 23.21 23.86
1166 NASDAQ AMPH Mon, Feb 11, 2019 23.08 23.35 22.80 23.35
1165 NASDAQ AMPH Fri, Feb 8, 2019 22.66 23.10 22.66 22.96
1164 NASDAQ AMPH Thu, Feb 7, 2019 22.90 23.07 22.65 22.87
1163 NASDAQ AMPH Wed, Feb 6, 2019 23.13 23.38 22.84 22.96
1162 NASDAQ AMPH Tue, Feb 5, 2019 22.86 23.40 22.86 23.15
1161 NASDAQ AMPH Mon, Feb 4, 2019 22.56 22.79 22.26 22.79
1160 NASDAQ AMPH Fri, Feb 1, 2019 22.72 22.85 22.39 22.50
1159 NASDAQ AMPH Thu, Jan 31, 2019 22.20 22.89 22.19 22.76
1158 NASDAQ AMPH Wed, Jan 30, 2019 22.11 22.35 22.01 22.24
1157 NASDAQ AMPH Tue, Jan 29, 2019 21.91 22.19 21.84 22.08
1156 NASDAQ AMPH Mon, Jan 28, 2019 22.29 22.29 21.78 21.88
1155 NASDAQ AMPH Fri, Jan 25, 2019 22.14 22.46 21.83 22.40
1154 NASDAQ AMPH Thu, Jan 24, 2019 22.60 22.60 21.96 22.02
1153 NASDAQ AMPH Wed, Jan 23, 2019 22.48 22.98 21.93 22.60
1152 NASDAQ AMPH Tue, Jan 22, 2019 21.76 22.50 21.76 22.39
1151 NASDAQ AMPH Fri, Jan 18, 2019 22.13 22.21 21.79 21.94
1150 NASDAQ AMPH Thu, Jan 17, 2019 21.71 22.34 21.71 22.08
1149 NASDAQ AMPH Wed, Jan 16, 2019 21.90 22.31 21.72 21.78
1148 NASDAQ AMPH Tue, Jan 15, 2019 21.35 22.00 21.35 21.88
1147 NASDAQ AMPH Mon, Jan 14, 2019 22.04 22.04 21.28 21.31
1146 NASDAQ AMPH Fri, Jan 11, 2019 21.92 22.18 21.72 22.11
1145 NASDAQ AMPH Thu, Jan 10, 2019 21.33 21.95 21.26 21.94
1144 NASDAQ AMPH Wed, Jan 9, 2019 21.00 21.87 21.00 21.40
1143 NASDAQ AMPH Tue, Jan 8, 2019 20.96 21.15 20.55 20.90
1142 NASDAQ AMPH Mon, Jan 7, 2019 20.81 21.09 20.60 20.74
1141 NASDAQ AMPH Fri, Jan 4, 2019 19.88 20.71 19.84 20.63
1140 NASDAQ AMPH Thu, Jan 3, 2019 20.00 20.00 19.35 19.46
1139 NASDAQ AMPH Wed, Jan 2, 2019 19.65 19.98 19.32 19.76
1138 NASDAQ AMPH Mon, Dec 31, 2018 20.18 20.18 19.67 19.90
1137 NASDAQ AMPH Fri, Dec 28, 2018 20.01 20.47 19.90 20.04
1136 NASDAQ AMPH Thu, Dec 27, 2018 19.53 19.99 19.20 19.96
1135 NASDAQ AMPH Wed, Dec 26, 2018 19.30 19.86 18.89 19.82
1134 NASDAQ AMPH Mon, Dec 24, 2018 19.66 19.71 19.04 19.04
1133 NASDAQ AMPH Fri, Dec 21, 2018 20.11 20.41 19.60 19.64
1132 NASDAQ AMPH Thu, Dec 20, 2018 20.73 20.85 19.59 20.08
1131 NASDAQ AMPH Wed, Dec 19, 2018 19.97 21.16 19.85 20.74
1130 NASDAQ AMPH Tue, Dec 18, 2018 20.00 20.42 19.87 19.94
1129 NASDAQ AMPH Mon, Dec 17, 2018 20.28 20.47 19.94 20.04
1128 NASDAQ AMPH Fri, Dec 14, 2018 20.67 20.98 20.22 20.32
1127 NASDAQ AMPH Thu, Dec 13, 2018 21.20 21.30 20.83 20.90
1126 NASDAQ AMPH Wed, Dec 12, 2018 21.47 21.56 20.93 21.11
1125 NASDAQ AMPH Tue, Dec 11, 2018 22.27 22.27 21.05 21.25
1124 NASDAQ AMPH Mon, Dec 10, 2018 21.96 22.13 21.11 22.00
1123 NASDAQ AMPH Fri, Dec 7, 2018 21.68 22.26 21.59 21.99
1122 NASDAQ AMPH Thu, Dec 6, 2018 21.23 21.75 20.76 21.72
1121 NASDAQ AMPH Tue, Dec 4, 2018 22.37 22.74 21.38 21.47
1120 NASDAQ AMPH Mon, Dec 3, 2018 21.79 22.52 21.75 22.51
1119 NASDAQ AMPH Fri, Nov 30, 2018 20.93 21.75 20.73 21.72
1118 NASDAQ AMPH Thu, Nov 29, 2018 20.39 20.69 20.09 20.36
1117 NASDAQ AMPH Wed, Nov 28, 2018 19.80 20.57 19.69 20.53
1116 NASDAQ AMPH Tue, Nov 27, 2018 19.51 19.78 19.22 19.65
1115 NASDAQ AMPH Mon, Nov 26, 2018 20.20 20.36 19.54 19.61
1114 NASDAQ AMPH Fri, Nov 23, 2018 19.84 20.44 19.84 20.15
1113 NASDAQ AMPH Wed, Nov 21, 2018 20.08 20.30 19.93 20.00
1112 NASDAQ AMPH Tue, Nov 20, 2018 20.27 20.62 19.99 20.07
1111 NASDAQ AMPH Mon, Nov 19, 2018 20.57 20.61 19.82 20.51
1110 NASDAQ AMPH Fri, Nov 16, 2018 20.76 21.60 20.39 20.67
1109 NASDAQ AMPH Thu, Nov 15, 2018 20.09 21.07 19.88 20.92
1108 NASDAQ AMPH Wed, Nov 14, 2018 21.19 21.20 20.11 20.13
1107 NASDAQ AMPH Tue, Nov 13, 2018 21.00 21.52 20.81 21.21
1106 NASDAQ AMPH Mon, Nov 12, 2018 21.16 21.29 20.04 21.00
1105 NASDAQ AMPH Fri, Nov 9, 2018 20.80 21.65 20.40 21.59
1104 NASDAQ AMPH Thu, Nov 8, 2018 19.60 20.99 19.49 20.71
1103 NASDAQ AMPH Wed, Nov 7, 2018 19.29 19.50 19.09 19.25
1102 NASDAQ AMPH Tue, Nov 6, 2018 18.94 19.33 18.77 19.23
1101 NASDAQ AMPH Mon, Nov 5, 2018 18.78 18.96 18.61 18.95
1100 NASDAQ AMPH Fri, Nov 2, 2018 18.64 18.92 18.48 18.77
1099 NASDAQ AMPH Thu, Nov 1, 2018 18.02 18.50 17.93 18.44
1098 NASDAQ AMPH Wed, Oct 31, 2018 18.39 18.43 17.92 17.95
1097 NASDAQ AMPH Tue, Oct 30, 2018 18.07 18.38 17.90 18.26
1096 NASDAQ AMPH Mon, Oct 29, 2018 18.49 18.69 17.94 18.08
1095 NASDAQ AMPH Fri, Oct 26, 2018 17.84 18.38 17.73 18.29
1094 NASDAQ AMPH Thu, Oct 25, 2018 17.71 18.17 17.71 17.97
1093 NASDAQ AMPH Wed, Oct 24, 2018 18.22 18.47 17.71 17.72
1092 NASDAQ AMPH Tue, Oct 23, 2018 18.01 18.42 17.76 18.23
1091 NASDAQ AMPH Mon, Oct 22, 2018 18.54 18.60 18.04 18.24
1090 NASDAQ AMPH Fri, Oct 19, 2018 18.74 18.95 18.44 18.53
1089 NASDAQ AMPH Thu, Oct 18, 2018 18.86 18.96 18.67 18.73
1088 NASDAQ AMPH Wed, Oct 17, 2018 18.58 18.96 18.45 18.87
1087 NASDAQ AMPH Tue, Oct 16, 2018 18.27 18.67 18.11 18.63
1086 NASDAQ AMPH Mon, Oct 15, 2018 18.12 18.40 18.01 18.18
1085 NASDAQ AMPH Fri, Oct 12, 2018 18.33 18.50 18.01 18.06
1084 NASDAQ AMPH Thu, Oct 11, 2018 18.60 18.71 18.12 18.15
1083 NASDAQ AMPH Wed, Oct 10, 2018 19.02 19.24 18.68 18.70
1082 NASDAQ AMPH Tue, Oct 9, 2018 18.81 19.20 18.78 19.02
1081 NASDAQ AMPH Mon, Oct 8, 2018 18.73 19.05 18.69 18.85
1080 NASDAQ AMPH Fri, Oct 5, 2018 19.05 19.06 18.60 18.77
1079 NASDAQ AMPH Thu, Oct 4, 2018 19.21 19.39 18.94 19.09
1078 NASDAQ AMPH Wed, Oct 3, 2018 19.12 19.48 19.01 19.25
1077 NASDAQ AMPH Tue, Oct 2, 2018 19.25 19.30 18.97 19.07
1076 NASDAQ AMPH Mon, Oct 1, 2018 19.26 19.66 19.14 19.26
1075 NASDAQ AMPH Fri, Sep 28, 2018 19.07 19.30 19.07 19.24
1074 NASDAQ AMPH Thu, Sep 27, 2018 19.23 19.38 19.00 19.13
1073 NASDAQ AMPH Wed, Sep 26, 2018 19.29 19.41 18.91 19.24
1072 NASDAQ AMPH Tue, Sep 25, 2018 19.40 19.43 19.22 19.24
1071 NASDAQ AMPH Mon, Sep 24, 2018 19.12 19.39 18.88 19.38
1070 NASDAQ AMPH Fri, Sep 21, 2018 19.10 19.18 18.84 19.18
1069 NASDAQ AMPH Thu, Sep 20, 2018 18.75 19.07 18.75 19.06
1068 NASDAQ AMPH Wed, Sep 19, 2018 18.56 18.76 18.43 18.70
1067 NASDAQ AMPH Tue, Sep 18, 2018 18.36 18.72 18.20 18.58
1066 NASDAQ AMPH Mon, Sep 17, 2018 18.90 18.90 18.24 18.35
1065 NASDAQ AMPH Fri, Sep 14, 2018 18.48 18.93 18.45 18.89
1064 NASDAQ AMPH Thu, Sep 13, 2018 18.56 18.68 18.28 18.48
1063 NASDAQ AMPH Wed, Sep 12, 2018 19.05 19.10 18.30 18.49
1062 NASDAQ AMPH Tue, Sep 11, 2018 19.20 19.32 19.01 19.06
1061 NASDAQ AMPH Mon, Sep 10, 2018 19.25 19.35 19.16 19.19
1060 NASDAQ AMPH Fri, Sep 7, 2018 19.19 19.39 19.04 19.27
1059 NASDAQ AMPH Thu, Sep 6, 2018 19.26 19.43 18.98 19.24
1058 NASDAQ AMPH Wed, Sep 5, 2018 19.29 19.50 19.15 19.35
1057 NASDAQ AMPH Tue, Sep 4, 2018 18.91 19.33 18.75 19.28
1056 NASDAQ AMPH Fri, Aug 31, 2018 18.37 19.00 18.34 18.98
1055 NASDAQ AMPH Thu, Aug 30, 2018 18.19 18.47 18.19 18.39
1054 NASDAQ AMPH Wed, Aug 29, 2018 18.12 18.31 18.09 18.27
1053 NASDAQ AMPH Tue, Aug 28, 2018 18.02 18.12 17.95 18.09
1052 NASDAQ AMPH Mon, Aug 27, 2018 18.12 18.13 17.96 18.03
1051 NASDAQ AMPH Fri, Aug 24, 2018 18.15 18.29 17.87 18.02
1050 NASDAQ AMPH Thu, Aug 23, 2018 18.35 18.39 18.05 18.12
1049 NASDAQ AMPH Wed, Aug 22, 2018 18.23 18.66 18.22 18.37
1048 NASDAQ AMPH Tue, Aug 21, 2018 17.97 18.25 17.91 18.22
1047 NASDAQ AMPH Mon, Aug 20, 2018 17.81 18.05 17.74 17.96
1046 NASDAQ AMPH Fri, Aug 17, 2018 17.98 18.02 17.75 17.82
1045 NASDAQ AMPH Thu, Aug 16, 2018 17.53 18.06 17.45 18.04
1044 NASDAQ AMPH Wed, Aug 15, 2018 17.69 17.77 17.25 17.50
1043 NASDAQ AMPH Tue, Aug 14, 2018 17.61 17.92 17.51 17.68
1042 NASDAQ AMPH Mon, Aug 13, 2018 17.37 17.83 17.31 17.63
1041 NASDAQ AMPH Fri, Aug 10, 2018 17.11 17.50 17.07 17.32
1040 NASDAQ AMPH Thu, Aug 9, 2018 17.05 17.89 16.18 17.18
1039 NASDAQ AMPH Wed, Aug 8, 2018 17.76 18.03 17.69 17.97
1038 NASDAQ AMPH Tue, Aug 7, 2018 17.66 17.99 17.66 17.80
1037 NASDAQ AMPH Mon, Aug 6, 2018 17.35 17.71 17.30 17.63
1036 NASDAQ AMPH Fri, Aug 3, 2018 17.28 17.42 17.21 17.40
1035 NASDAQ AMPH Thu, Aug 2, 2018 17.17 17.33 17.10 17.27
1034 NASDAQ AMPH Wed, Aug 1, 2018 17.45 17.49 17.10 17.22
1033 NASDAQ AMPH Tue, Jul 31, 2018 17.17 17.54 17.16 17.45
1032 NASDAQ AMPH Mon, Jul 30, 2018 17.18 17.48 17.12 17.13
1031 NASDAQ AMPH Fri, Jul 27, 2018 17.40 17.42 17.05 17.19
1030 NASDAQ AMPH Thu, Jul 26, 2018 17.20 17.58 17.10 17.43
1029 NASDAQ AMPH Wed, Jul 25, 2018 17.15 17.29 16.98 17.20
1028 NASDAQ AMPH Tue, Jul 24, 2018 17.19 17.27 16.89 17.17
1027 NASDAQ AMPH Mon, Jul 23, 2018 16.83 17.22 16.83 17.13
1026 NASDAQ AMPH Fri, Jul 20, 2018 16.72 16.95 16.57 16.90
1025 NASDAQ AMPH Thu, Jul 19, 2018 16.30 16.74 16.26 16.64
1024 NASDAQ AMPH Wed, Jul 18, 2018 16.43 16.64 16.21 16.37
1023 NASDAQ AMPH Tue, Jul 17, 2018 16.19 16.59 16.19 16.42
1022 NASDAQ AMPH Mon, Jul 16, 2018 16.50 16.50 16.07 16.21
1021 NASDAQ AMPH Fri, Jul 13, 2018 16.64 16.77 16.51 16.53
1020 NASDAQ AMPH Thu, Jul 12, 2018 16.73 16.82 16.49 16.67
1019 NASDAQ AMPH Wed, Jul 11, 2018 16.85 17.00 16.56 16.68
1018 NASDAQ AMPH Tue, Jul 10, 2018 16.79 16.99 16.69 16.91
1017 NASDAQ AMPH Mon, Jul 9, 2018 16.70 16.95 16.06 16.80
1016 NASDAQ AMPH Fri, Jul 6, 2018 16.32 16.57 16.30 16.35
1015 NASDAQ AMPH Thu, Jul 5, 2018 15.81 16.41 15.37 16.34
1014 NASDAQ AMPH Tue, Jul 3, 2018 15.41 15.97 15.41 15.76
1013 NASDAQ AMPH Mon, Jul 2, 2018 15.13 15.44 15.04 15.39
1012 NASDAQ AMPH Fri, Jun 29, 2018 15.54 15.70 15.17 15.26
1011 NASDAQ AMPH Thu, Jun 28, 2018 15.54 15.68 15.37 15.50
1010 NASDAQ AMPH Wed, Jun 27, 2018 15.82 16.01 15.54 15.55
1009 NASDAQ AMPH Tue, Jun 26, 2018 15.56 15.98 15.50 15.87
1008 NASDAQ AMPH Mon, Jun 25, 2018 15.83 15.86 15.47 15.55
1007 NASDAQ AMPH Fri, Jun 22, 2018 16.15 16.16 15.76 15.77
1006 NASDAQ AMPH Thu, Jun 21, 2018 16.54 16.57 16.06 16.10
1005 NASDAQ AMPH Wed, Jun 20, 2018 16.98 17.06 16.48 16.50
1004 NASDAQ AMPH Tue, Jun 19, 2018 16.73 17.22 16.73 16.96
1003 NASDAQ AMPH Mon, Jun 18, 2018 16.83 16.95 16.64 16.84
1002 NASDAQ AMPH Fri, Jun 15, 2018 16.92 17.04 16.82 16.88
1001 NASDAQ AMPH Thu, Jun 14, 2018 16.80 17.01 16.70 16.96
1000 NASDAQ AMPH Wed, Jun 13, 2018 16.70 16.94 16.65 16.77
999 NASDAQ AMPH Tue, Jun 12, 2018 16.59 16.94 16.50 16.68
998 NASDAQ AMPH Mon, Jun 11, 2018 16.65 16.84 16.39 16.59
997 NASDAQ AMPH Fri, Jun 8, 2018 16.72 17.04 16.63 16.67
996 NASDAQ AMPH Thu, Jun 7, 2018 16.82 16.91 16.64 16.69
995 NASDAQ AMPH Wed, Jun 6, 2018 16.68 17.15 16.54 16.79
994 NASDAQ AMPH Tue, Jun 5, 2018 16.50 16.86 16.46 16.65
993 NASDAQ AMPH Mon, Jun 4, 2018 16.18 16.60 16.04 16.52
992 NASDAQ AMPH Fri, Jun 1, 2018 15.89 16.27 15.89 16.12
991 NASDAQ AMPH Thu, May 31, 2018 15.93 16.16 15.65 15.80
990 NASDAQ AMPH Wed, May 30, 2018 16.15 16.40 15.82 15.91
989 NASDAQ AMPH Tue, May 29, 2018 16.00 16.16 15.78 16.10
988 NASDAQ AMPH Fri, May 25, 2018 16.34 16.59 15.98 16.00
987 NASDAQ AMPH Thu, May 24, 2018 16.58 16.90 16.51 16.56
986 NASDAQ AMPH Wed, May 23, 2018 16.54 16.93 16.47 16.59
985 NASDAQ AMPH Tue, May 22, 2018 16.57 16.92 16.57 16.64
984 NASDAQ AMPH Mon, May 21, 2018 16.70 16.70 16.29 16.57
983 NASDAQ AMPH Fri, May 18, 2018 16.64 16.81 16.32 16.63
982 NASDAQ AMPH Thu, May 17, 2018 15.91 16.33 15.91 16.22
981 NASDAQ AMPH Wed, May 16, 2018 15.56 16.14 15.54 16.00
980 NASDAQ AMPH Tue, May 15, 2018 16.50 16.51 15.53 15.57
979 NASDAQ AMPH Mon, May 14, 2018 15.06 16.55 15.01 16.12
978 NASDAQ AMPH Fri, May 11, 2018 14.91 15.85 14.75 14.91
977 NASDAQ AMPH Thu, May 10, 2018 18.50 18.50 14.40 14.63
976 NASDAQ AMPH Wed, May 9, 2018 19.21 19.45 18.99 19.43
975 NASDAQ AMPH Tue, May 8, 2018 18.93 19.25 18.85 19.21
974 NASDAQ AMPH Mon, May 7, 2018 18.92 19.09 18.78 18.98
973 NASDAQ AMPH Fri, May 4, 2018 18.48 18.91 18.47 18.77
972 NASDAQ AMPH Thu, May 3, 2018 18.92 18.92 18.39 18.50
971 NASDAQ AMPH Wed, May 2, 2018 19.10 19.27 18.92 18.97
970 NASDAQ AMPH Tue, May 1, 2018 19.07 19.17 18.71 19.13
969 NASDAQ AMPH Mon, Apr 30, 2018 19.28 19.42 19.09 19.09
968 NASDAQ AMPH Fri, Apr 27, 2018 19.22 19.30 19.10 19.25
967 NASDAQ AMPH Thu, Apr 26, 2018 19.29 19.39 19.17 19.21
966 NASDAQ AMPH Wed, Apr 25, 2018 19.26 19.37 19.00 19.28
965 NASDAQ AMPH Tue, Apr 24, 2018 19.43 19.60 19.07 19.25
964 NASDAQ AMPH Mon, Apr 23, 2018 19.39 19.46 19.13 19.33
963 NASDAQ AMPH Fri, Apr 20, 2018 19.43 19.61 19.25 19.31
962 NASDAQ AMPH Thu, Apr 19, 2018 19.51 19.72 19.45 19.48
961 NASDAQ AMPH Wed, Apr 18, 2018 19.67 19.94 19.52 19.56
960 NASDAQ AMPH Tue, Apr 17, 2018 19.27 19.68 19.03 19.60
959 NASDAQ AMPH Mon, Apr 16, 2018 19.07 19.20 18.85 19.18
958 NASDAQ AMPH Fri, Apr 13, 2018 19.10 19.10 18.54 18.96
957 NASDAQ AMPH Thu, Apr 12, 2018 19.21 19.29 19.05 19.05
956 NASDAQ AMPH Wed, Apr 11, 2018 19.19 19.44 18.75 19.21
955 NASDAQ AMPH Tue, Apr 10, 2018 19.05 19.26 18.91 19.25
954 NASDAQ AMPH Mon, Apr 9, 2018 19.16 19.30 18.84 18.88
953 NASDAQ AMPH Fri, Apr 6, 2018 19.11 19.30 18.86 19.01
952 NASDAQ AMPH Thu, Apr 5, 2018 19.13 19.44 18.95 19.14
951 NASDAQ AMPH Wed, Apr 4, 2018 18.36 19.08 18.36 19.02
950 NASDAQ AMPH Tue, Apr 3, 2018 18.34 18.73 18.28 18.64
949 NASDAQ AMPH Mon, Apr 2, 2018 18.65 18.86 18.11 18.24
948 NASDAQ AMPH Thu, Mar 29, 2018 18.55 18.92 18.36 18.75
947 NASDAQ AMPH Wed, Mar 28, 2018 18.46 18.86 18.35 18.47
946 NASDAQ AMPH Tue, Mar 27, 2018 18.65 18.95 18.40 18.47
945 NASDAQ AMPH Mon, Mar 26, 2018 18.84 18.88 18.29 18.61
944 NASDAQ AMPH Fri, Mar 23, 2018 19.12 19.17 18.59 18.61
943 NASDAQ AMPH Thu, Mar 22, 2018 19.30 19.55 19.10 19.12
942 NASDAQ AMPH Wed, Mar 21, 2018 19.40 19.67 19.15 19.51
941 NASDAQ AMPH Tue, Mar 20, 2018 19.60 20.01 19.08 19.44
940 NASDAQ AMPH Mon, Mar 19, 2018 19.05 19.62 19.05 19.57
939 NASDAQ AMPH Fri, Mar 16, 2018 19.83 20.00 19.81 19.91
938 NASDAQ AMPH Thu, Mar 15, 2018 20.27 20.35 19.76 19.79
937 NASDAQ AMPH Wed, Mar 14, 2018 20.28 20.45 19.81 20.24
936 NASDAQ AMPH Tue, Mar 13, 2018 19.72 20.45 19.58 20.35
935 NASDAQ AMPH Mon, Mar 12, 2018 19.14 19.59 19.08 19.58
934 NASDAQ AMPH Fri, Mar 9, 2018 18.96 19.39 18.77 19.14
933 NASDAQ AMPH Thu, Mar 8, 2018 18.29 18.81 18.29 18.80
932 NASDAQ AMPH Wed, Mar 7, 2018 17.74 18.49 17.74 18.30
931 NASDAQ AMPH Tue, Mar 6, 2018 18.19 18.19 17.69 17.93
930 NASDAQ AMPH Mon, Mar 5, 2018 18.26 18.56 17.91 18.13
929 NASDAQ AMPH Fri, Mar 2, 2018 17.96 18.49 17.96 18.34
928 NASDAQ AMPH Thu, Mar 1, 2018 18.35 18.52 18.01 18.06
927 NASDAQ AMPH Wed, Feb 28, 2018 19.10 19.10 18.35 18.36
926 NASDAQ AMPH Tue, Feb 27, 2018 19.17 19.30 18.97 19.04
925 NASDAQ AMPH Mon, Feb 26, 2018 19.18 19.36 18.94 19.18
924 NASDAQ AMPH Fri, Feb 23, 2018 19.00 19.23 18.78 19.20
923 NASDAQ AMPH Thu, Feb 22, 2018 18.81 19.11 18.59 18.84
922 NASDAQ AMPH Wed, Feb 21, 2018 18.49 19.29 18.49 18.73
921 NASDAQ AMPH Tue, Feb 20, 2018 18.65 18.87 18.40 18.42
920 NASDAQ AMPH Fri, Feb 16, 2018 18.99 19.16 18.70 18.78
919 NASDAQ AMPH Thu, Feb 15, 2018 18.91 19.08 18.81 19.03
918 NASDAQ AMPH Wed, Feb 14, 2018 18.21 18.80 18.08 18.76
917 NASDAQ AMPH Tue, Feb 13, 2018 18.45 18.60 18.11 18.41
916 NASDAQ AMPH Mon, Feb 12, 2018 18.51 18.75 18.34 18.50
915 NASDAQ AMPH Fri, Feb 9, 2018 18.03 18.53 17.74 18.40
914 NASDAQ AMPH Thu, Feb 8, 2018 17.95 18.35 17.65 17.85
913 NASDAQ AMPH Wed, Feb 7, 2018 17.52 18.05 17.20 17.94
912 NASDAQ AMPH Tue, Feb 6, 2018 16.87 17.66 16.76 17.54
911 NASDAQ AMPH Mon, Feb 5, 2018 18.18 18.42 17.21 17.23
910 NASDAQ AMPH Fri, Feb 2, 2018 18.79 18.88 18.35 18.37
909 NASDAQ AMPH Thu, Feb 1, 2018 18.62 18.97 18.34 18.94
908 NASDAQ AMPH Wed, Jan 31, 2018 19.15 19.18 18.58 18.64
907 NASDAQ AMPH Tue, Jan 30, 2018 19.42 19.44 18.92 18.92
906 NASDAQ AMPH Mon, Jan 29, 2018 19.52 19.79 19.45 19.59
905 NASDAQ AMPH Fri, Jan 26, 2018 19.49 19.84 19.23 19.58
904 NASDAQ AMPH Thu, Jan 25, 2018 19.39 19.44 19.14 19.40
903 NASDAQ AMPH Wed, Jan 24, 2018 19.40 19.58 19.17 19.32
902 NASDAQ AMPH Tue, Jan 23, 2018 19.40 19.59 19.26 19.39
901 NASDAQ AMPH Mon, Jan 22, 2018 19.41 19.60 19.21 19.37
900 NASDAQ AMPH Fri, Jan 19, 2018 19.41 19.48 19.20 19.37
899 NASDAQ AMPH Thu, Jan 18, 2018 19.33 19.50 19.00 19.46
898 NASDAQ AMPH Wed, Jan 17, 2018 18.89 19.47 18.80 19.45
897 NASDAQ AMPH Tue, Jan 16, 2018 18.53 18.88 18.52 18.78
896 NASDAQ AMPH Fri, Jan 12, 2018 18.14 18.81 18.14 18.56
895 NASDAQ AMPH Thu, Jan 11, 2018 17.82 18.19 17.77 18.16
894 NASDAQ AMPH Wed, Jan 10, 2018 17.83 17.96 17.60 17.82
893 NASDAQ AMPH Tue, Jan 9, 2018 18.06 18.24 17.90 17.92
892 NASDAQ AMPH Mon, Jan 8, 2018 18.06 18.23 17.75 18.03
891 NASDAQ AMPH Fri, Jan 5, 2018 18.36 18.48 17.94 18.06
890 NASDAQ AMPH Thu, Jan 4, 2018 18.90 18.96 18.22 18.28
889 NASDAQ AMPH Wed, Jan 3, 2018 19.17 19.55 18.64 18.77
888 NASDAQ AMPH Tue, Jan 2, 2018 19.30 19.48 19.01 19.17
887 NASDAQ AMPH Fri, Dec 29, 2017 19.76 19.90 19.23 19.24
886 NASDAQ AMPH Thu, Dec 28, 2017 19.77 19.95 19.66 19.74
885 NASDAQ AMPH Wed, Dec 27, 2017 19.64 19.95 19.59 19.75
884 NASDAQ AMPH Tue, Dec 26, 2017 19.34 19.80 19.26 19.64
883 NASDAQ AMPH Fri, Dec 22, 2017 19.50 19.75 19.27 19.37
882 NASDAQ AMPH Thu, Dec 21, 2017 19.18 19.68 19.18 19.50
881 NASDAQ AMPH Wed, Dec 20, 2017 19.09 19.60 19.09 19.31
880 NASDAQ AMPH Tue, Dec 19, 2017 19.59 19.68 19.15 19.18
879 NASDAQ AMPH Mon, Dec 18, 2017 19.40 19.61 19.16 19.52
878 NASDAQ AMPH Fri, Dec 15, 2017 18.74 19.31 18.74 19.30
877 NASDAQ AMPH Thu, Dec 14, 2017 19.22 19.42 18.63 18.73
876 NASDAQ AMPH Wed, Dec 13, 2017 19.25 19.50 19.01 19.21
875 NASDAQ AMPH Tue, Dec 12, 2017 18.64 19.35 18.58 19.26
874 NASDAQ AMPH Mon, Dec 11, 2017 18.50 18.75 18.27 18.60
873 NASDAQ AMPH Fri, Dec 8, 2017 18.47 18.57 18.33 18.46
872 NASDAQ AMPH Thu, Dec 7, 2017 18.33 18.52 18.16 18.32
871 NASDAQ AMPH Wed, Dec 6, 2017 18.63 18.68 18.21 18.33
870 NASDAQ AMPH Tue, Dec 5, 2017 18.88 19.11 18.56 18.68
869 NASDAQ AMPH Mon, Dec 4, 2017 19.29 19.56 18.89 18.89
868 NASDAQ AMPH Fri, Dec 1, 2017 19.60 19.75 18.68 19.18
867 NASDAQ AMPH Thu, Nov 30, 2017 19.20 19.60 19.00 19.59
866 NASDAQ AMPH Wed, Nov 29, 2017 18.26 19.20 18.26 19.08
865 NASDAQ AMPH Tue, Nov 28, 2017 18.03 18.43 17.90 18.19
864 NASDAQ AMPH Mon, Nov 27, 2017 18.32 18.60 17.85 18.03
863 NASDAQ AMPH Fri, Nov 24, 2017 18.86 18.86 18.10 18.30
862 NASDAQ AMPH Wed, Nov 22, 2017 18.89 19.14 18.80 18.90
861 NASDAQ AMPH Tue, Nov 21, 2017 18.37 19.02 18.36 18.88
860 NASDAQ AMPH Mon, Nov 20, 2017 18.20 18.47 18.01 18.33
859 NASDAQ AMPH Fri, Nov 17, 2017 18.04 18.48 18.04 18.38
858 NASDAQ AMPH Thu, Nov 16, 2017 17.92 18.17 17.83 18.15
857 NASDAQ AMPH Wed, Nov 15, 2017 17.71 18.01 17.36 17.86
856 NASDAQ AMPH Tue, Nov 14, 2017 17.86 18.07 17.53 17.76
855 NASDAQ AMPH Mon, Nov 13, 2017 18.55 18.55 17.77 17.86
854 NASDAQ AMPH Fri, Nov 10, 2017 18.73 19.22 18.46 18.55
853 NASDAQ AMPH Thu, Nov 9, 2017 17.00 19.15 17.00 18.81
852 NASDAQ AMPH Wed, Nov 8, 2017 17.76 18.30 17.52 17.81
851 NASDAQ AMPH Tue, Nov 7, 2017 17.98 18.16 17.79 17.89
850 NASDAQ AMPH Mon, Nov 6, 2017 19.15 19.15 17.95 17.97
849 NASDAQ AMPH Fri, Nov 3, 2017 18.49 19.13 18.49 19.12
848 NASDAQ AMPH Thu, Nov 2, 2017 18.49 18.54 18.24 18.52
847 NASDAQ AMPH Wed, Nov 1, 2017 18.18 18.54 18.02 18.43
846 NASDAQ AMPH Tue, Oct 31, 2017 18.22 18.44 17.98 18.07
845 NASDAQ AMPH Mon, Oct 30, 2017 18.36 18.52 17.88 18.15
844 NASDAQ AMPH Fri, Oct 27, 2017 18.48 18.50 18.24 18.41
843 NASDAQ AMPH Thu, Oct 26, 2017 18.20 18.65 18.19 18.41
842 NASDAQ AMPH Wed, Oct 25, 2017 18.26 18.41 18.02 18.18
841 NASDAQ AMPH Tue, Oct 24, 2017 18.31 18.45 17.87 18.25
840 NASDAQ AMPH Mon, Oct 23, 2017 18.52 18.52 18.14 18.26
839 NASDAQ AMPH Fri, Oct 20, 2017 18.54 18.67 18.41 18.50
838 NASDAQ AMPH Thu, Oct 19, 2017 18.41 18.54 17.97 18.45
837 NASDAQ AMPH Wed, Oct 18, 2017 18.40 18.67 18.35 18.54
836 NASDAQ AMPH Tue, Oct 17, 2017 18.66 18.66 18.35 18.48
835 NASDAQ AMPH Mon, Oct 16, 2017 18.73 19.04 18.67 18.74
834 NASDAQ AMPH Fri, Oct 13, 2017 18.70 18.73 17.79 18.67
833 NASDAQ AMPH Thu, Oct 12, 2017 18.85 18.86 18.57 18.71
832 NASDAQ AMPH Wed, Oct 11, 2017 18.80 19.04 18.72 18.86
831 NASDAQ AMPH Tue, Oct 10, 2017 18.70 18.86 18.59 18.70
830 NASDAQ AMPH Mon, Oct 9, 2017 19.00 19.00 18.63 18.70
829 NASDAQ AMPH Fri, Oct 6, 2017 18.99 19.02 18.80 18.94
828 NASDAQ AMPH Thu, Oct 5, 2017 18.31 19.05 18.31 18.96
827 NASDAQ AMPH Wed, Oct 4, 2017 18.60 18.80 18.45 18.49
826 NASDAQ AMPH Tue, Oct 3, 2017 18.74 18.83 18.35 18.55
825 NASDAQ AMPH Mon, Oct 2, 2017 17.97 18.70 17.92 18.69
824 NASDAQ AMPH Fri, Sep 29, 2017 17.85 18.25 17.81 17.87
823 NASDAQ AMPH Thu, Sep 28, 2017 17.90 17.97 17.73 17.89
822 NASDAQ AMPH Wed, Sep 27, 2017 17.45 18.00 17.33 17.99
821 NASDAQ AMPH Tue, Sep 26, 2017 16.80 18.00 16.80 17.48
820 NASDAQ AMPH Mon, Sep 25, 2017 16.04 16.65 15.91 16.27
819 NASDAQ AMPH Fri, Sep 22, 2017 16.42 16.42 15.85 16.10
818 NASDAQ AMPH Thu, Sep 21, 2017 15.73 17.00 15.72 16.40
817 NASDAQ AMPH Wed, Sep 20, 2017 15.69 15.79 15.56 15.64
816 NASDAQ AMPH Tue, Sep 19, 2017 15.84 15.89 15.46 15.66
815 NASDAQ AMPH Mon, Sep 18, 2017 15.74 16.00 15.72 15.78
814 NASDAQ AMPH Fri, Sep 15, 2017 15.82 15.87 15.68 15.73
813 NASDAQ AMPH Thu, Sep 14, 2017 15.71 15.91 15.65 15.78
812 NASDAQ AMPH Wed, Sep 13, 2017 15.76 15.98 15.67 15.69
811 NASDAQ AMPH Tue, Sep 12, 2017 15.79 16.04 15.74 15.77
810 NASDAQ AMPH Mon, Sep 11, 2017 15.68 15.96 15.68 15.79
809 NASDAQ AMPH Fri, Sep 8, 2017 15.54 15.91 15.51 15.68
808 NASDAQ AMPH Thu, Sep 7, 2017 15.67 15.69 15.40 15.54
807 NASDAQ AMPH Wed, Sep 6, 2017 15.78 15.95 15.55 15.65
806 NASDAQ AMPH Tue, Sep 5, 2017 15.87 15.89 15.53 15.73
805 NASDAQ AMPH Fri, Sep 1, 2017 15.98 16.01 15.56 15.88
804 NASDAQ AMPH Thu, Aug 31, 2017 15.55 16.10 15.55 16.01
803 NASDAQ AMPH Wed, Aug 30, 2017 15.75 15.75 15.47 15.48
802 NASDAQ AMPH Tue, Aug 29, 2017 15.58 15.84 15.38 15.73
801 NASDAQ AMPH Mon, Aug 28, 2017 15.69 15.73 15.44 15.68
800 NASDAQ AMPH Fri, Aug 25, 2017 15.60 15.77 15.45 15.55
799 NASDAQ AMPH Thu, Aug 24, 2017 15.44 15.67 15.42 15.43
798 NASDAQ AMPH Wed, Aug 23, 2017 15.36 15.53 15.25 15.44
797 NASDAQ AMPH Tue, Aug 22, 2017 15.01 15.55 14.99 15.49
796 NASDAQ AMPH Mon, Aug 21, 2017 15.15 15.18 14.81 15.07
795 NASDAQ AMPH Fri, Aug 18, 2017 14.67 15.34 14.53 15.22
794 NASDAQ AMPH Thu, Aug 17, 2017 14.87 15.03 14.71 14.73
793 NASDAQ AMPH Wed, Aug 16, 2017 14.87 14.99 14.80 14.89
792 NASDAQ AMPH Tue, Aug 15, 2017 14.73 14.98 14.60 14.80
791 NASDAQ AMPH Mon, Aug 14, 2017 14.97 14.98 14.61 14.76
790 NASDAQ AMPH Fri, Aug 11, 2017 15.22 15.38 14.69 14.89
789 NASDAQ AMPH Thu, Aug 10, 2017 15.94 15.94 15.12 15.27
788 NASDAQ AMPH Wed, Aug 9, 2017 15.65 16.13 15.53 15.54
787 NASDAQ AMPH Tue, Aug 8, 2017 16.00 16.21 15.59 15.64
786 NASDAQ AMPH Mon, Aug 7, 2017 15.99 16.22 15.83 15.94
785 NASDAQ AMPH Fri, Aug 4, 2017 15.77 16.09 15.57 15.98
784 NASDAQ AMPH Thu, Aug 3, 2017 16.10 16.12 15.36 15.72
783 NASDAQ AMPH Wed, Aug 2, 2017 16.73 16.87 15.91 16.06
782 NASDAQ AMPH Tue, Aug 1, 2017 17.31 17.31 16.56 16.67
781 NASDAQ AMPH Mon, Jul 31, 2017 17.55 17.57 17.26 17.28
780 NASDAQ AMPH Fri, Jul 28, 2017 17.20 17.66 17.20 17.56
779 NASDAQ AMPH Thu, Jul 27, 2017 17.72 17.86 17.11 17.29
778 NASDAQ AMPH Wed, Jul 26, 2017 17.72 17.85 17.55 17.62
777 NASDAQ AMPH Tue, Jul 25, 2017 17.80 17.97 17.50 17.71
776 NASDAQ AMPH Mon, Jul 24, 2017 18.48 18.48 17.52 17.75
775 NASDAQ AMPH Fri, Jul 21, 2017 18.09 18.67 17.89 18.45
774 NASDAQ AMPH Thu, Jul 20, 2017 17.76 18.10 17.76 17.92
773 NASDAQ AMPH Wed, Jul 19, 2017 17.95 18.00 17.54 17.74
772 NASDAQ AMPH Tue, Jul 18, 2017 17.89 17.98 17.70 17.87
771 NASDAQ AMPH Mon, Jul 17, 2017 17.81 18.09 17.69 17.95
770 NASDAQ AMPH Fri, Jul 14, 2017 17.85 18.04 17.71 17.82
769 NASDAQ AMPH Thu, Jul 13, 2017 17.90 17.90 17.45 17.84
768 NASDAQ AMPH Wed, Jul 12, 2017 18.00 18.00 17.81 17.85
767 NASDAQ AMPH Tue, Jul 11, 2017 17.64 18.09 17.64 17.86
766 NASDAQ AMPH Mon, Jul 10, 2017 18.10 18.10 17.52 17.62
765 NASDAQ AMPH Fri, Jul 7, 2017 17.90 18.14 17.79 18.10
764 NASDAQ AMPH Thu, Jul 6, 2017 17.84 18.04 16.83 17.91
763 NASDAQ AMPH Wed, Jul 5, 2017 17.93 18.10 17.78 17.95
762 NASDAQ AMPH Mon, Jul 3, 2017 17.85 18.16 17.77 17.93
761 NASDAQ AMPH Fri, Jun 30, 2017 17.60 17.95 17.52 17.86
760 NASDAQ AMPH Thu, Jun 29, 2017 17.65 17.70 17.49 17.60
759 NASDAQ AMPH Wed, Jun 28, 2017 17.38 17.68 17.25 17.68
758 NASDAQ AMPH Tue, Jun 27, 2017 17.70 17.70 17.23 17.26
757 NASDAQ AMPH Mon, Jun 26, 2017 17.87 17.89 17.56 17.74
756 NASDAQ AMPH Fri, Jun 23, 2017 17.60 17.82 17.41 17.79
755 NASDAQ AMPH Thu, Jun 22, 2017 17.48 17.88 17.48 17.65
754 NASDAQ AMPH Wed, Jun 21, 2017 17.19 17.76 17.19 17.48
753 NASDAQ AMPH Tue, Jun 20, 2017 16.88 17.75 16.80 17.14
752 NASDAQ AMPH Mon, Jun 19, 2017 16.75 17.00 16.55 16.93
751 NASDAQ AMPH Fri, Jun 16, 2017 16.50 16.92 16.32 16.62
750 NASDAQ AMPH Thu, Jun 15, 2017 16.07 16.33 15.84 16.18
749 NASDAQ AMPH Wed, Jun 14, 2017 16.52 16.62 16.17 16.22
748 NASDAQ AMPH Tue, Jun 13, 2017 16.68 16.68 16.03 16.49
747 NASDAQ AMPH Mon, Jun 12, 2017 16.76 17.00 16.38 16.60
746 NASDAQ AMPH Fri, Jun 9, 2017 17.06 17.24 16.74 16.84
745 NASDAQ AMPH Thu, Jun 8, 2017 17.02 17.29 16.83 17.11
744 NASDAQ AMPH Wed, Jun 7, 2017 16.95 17.34 16.78 16.95
743 NASDAQ AMPH Tue, Jun 6, 2017 17.02 17.14 16.77 16.92
742 NASDAQ AMPH Mon, Jun 5, 2017 17.16 17.16 16.61 17.06
741 NASDAQ AMPH Fri, Jun 2, 2017 17.20 17.35 16.92 17.14
740 NASDAQ AMPH Thu, Jun 1, 2017 16.98 17.37 16.77 17.09
739 NASDAQ AMPH Wed, May 31, 2017 17.05 17.41 16.95 17.07
738 NASDAQ AMPH Tue, May 30, 2017 16.90 17.84 16.76 17.07
737 NASDAQ AMPH Fri, May 26, 2017 15.67 17.36 15.66 16.97
736 NASDAQ AMPH Thu, May 25, 2017 15.50 15.71 15.37 15.47
735 NASDAQ AMPH Wed, May 24, 2017 15.57 15.75 15.41 15.50
734 NASDAQ AMPH Tue, May 23, 2017 15.59 15.69 15.37 15.56
733 NASDAQ AMPH Mon, May 22, 2017 15.48 15.71 15.39 15.54
732 NASDAQ AMPH Fri, May 19, 2017 15.58 15.98 15.31 15.45
731 NASDAQ AMPH Thu, May 18, 2017 15.27 15.63 15.12 15.55
730 NASDAQ AMPH Wed, May 17, 2017 15.62 15.83 15.31 15.33
729 NASDAQ AMPH Tue, May 16, 2017 15.80 15.99 15.72 15.79
728 NASDAQ AMPH Mon, May 15, 2017 16.13 16.33 15.76 15.80
727 NASDAQ AMPH Fri, May 12, 2017 15.86 16.48 15.76 16.22
726 NASDAQ AMPH Thu, May 11, 2017 15.08 15.93 15.04 15.87
725 NASDAQ AMPH Wed, May 10, 2017 14.76 15.13 14.71 15.11
724 NASDAQ AMPH Tue, May 9, 2017 14.04 14.98 13.15 14.73
723 NASDAQ AMPH Mon, May 8, 2017 14.95 15.18 14.80 14.94
722 NASDAQ AMPH Fri, May 5, 2017 15.20 15.22 14.80 15.00
721 NASDAQ AMPH Thu, May 4, 2017 14.96 15.15 14.80 15.14
720 NASDAQ AMPH Wed, May 3, 2017 15.30 15.32 14.67 14.92
719 NASDAQ AMPH Tue, May 2, 2017 15.25 15.61 15.12 15.35
718 NASDAQ AMPH Mon, May 1, 2017 15.12 15.36 14.98 15.21
717 NASDAQ AMPH Fri, Apr 28, 2017 15.20 15.30 15.01 15.10
716 NASDAQ AMPH Thu, Apr 27, 2017 15.32 15.47 15.11 15.16
715 NASDAQ AMPH Wed, Apr 26, 2017 15.04 15.37 14.94 15.32
714 NASDAQ AMPH Tue, Apr 25, 2017 14.99 15.19 14.90 15.00
713 NASDAQ AMPH Mon, Apr 24, 2017 14.89 15.06 14.70 14.87
712 NASDAQ AMPH Fri, Apr 21, 2017 14.66 14.75 14.41 14.74
711 NASDAQ AMPH Thu, Apr 20, 2017 14.56 14.77 14.45 14.65
710 NASDAQ AMPH Wed, Apr 19, 2017 14.50 14.92 14.48 14.51
709 NASDAQ AMPH Tue, Apr 18, 2017 14.75 14.75 14.27 14.54
708 NASDAQ AMPH Mon, Apr 17, 2017 14.82 14.97 14.66 14.88
707 NASDAQ AMPH Thu, Apr 13, 2017 14.70 14.95 14.55 14.80
706 NASDAQ AMPH Wed, Apr 12, 2017 14.63 14.83 14.45 14.76
705 NASDAQ AMPH Tue, Apr 11, 2017 14.57 14.85 14.52 14.66
704 NASDAQ AMPH Mon, Apr 10, 2017 14.67 14.90 14.35 14.56
703 NASDAQ AMPH Fri, Apr 7, 2017 14.33 14.67 14.14 14.62
702 NASDAQ AMPH Thu, Apr 6, 2017 14.25 14.52 14.06 14.37
701 NASDAQ AMPH Wed, Apr 5, 2017 14.32 14.45 14.01 14.20
700 NASDAQ AMPH Tue, Apr 4, 2017 14.10 14.42 14.07 14.30
699 NASDAQ AMPH Mon, Apr 3, 2017 14.53 14.57 14.11 14.17
698 NASDAQ AMPH Fri, Mar 31, 2017 14.75 14.82 14.31 14.50
697 NASDAQ AMPH Thu, Mar 30, 2017 14.71 14.89 14.58 14.73
696 NASDAQ AMPH Wed, Mar 29, 2017 14.65 14.81 14.49 14.69
695 NASDAQ AMPH Tue, Mar 28, 2017 14.18 14.81 14.04 14.63
694 NASDAQ AMPH Mon, Mar 27, 2017 13.59 14.32 13.55 14.27
693 NASDAQ AMPH Fri, Mar 24, 2017 13.71 13.98 13.54 13.76
692 NASDAQ AMPH Thu, Mar 23, 2017 13.60 14.00 13.42 13.71
691 NASDAQ AMPH Wed, Mar 22, 2017 13.58 13.83 13.37 13.60
690 NASDAQ AMPH Tue, Mar 21, 2017 14.31 14.32 13.51 13.51
689 NASDAQ AMPH Mon, Mar 20, 2017 13.70 14.33 13.67 14.27
688 NASDAQ AMPH Fri, Mar 17, 2017 13.31 13.94 13.24 13.75
687 NASDAQ AMPH Thu, Mar 16, 2017 13.42 13.64 13.12 13.35
686 NASDAQ AMPH Wed, Mar 15, 2017 12.20 13.51 12.10 13.43
685 NASDAQ AMPH Tue, Mar 14, 2017 13.96 13.96 12.05 12.20
684 NASDAQ AMPH Mon, Mar 13, 2017 14.56 14.87 14.36 14.74
683 NASDAQ AMPH Fri, Mar 10, 2017 14.72 14.97 14.46 14.62
682 NASDAQ AMPH Thu, Mar 9, 2017 14.86 15.04 14.60 14.64
681 NASDAQ AMPH Wed, Mar 8, 2017 15.06 15.20 14.73 14.83
680 NASDAQ AMPH Tue, Mar 7, 2017 14.77 15.12 14.65 14.97
679 NASDAQ AMPH Mon, Mar 6, 2017 15.04 15.13 14.82 14.87
678 NASDAQ AMPH Fri, Mar 3, 2017 15.14 15.54 14.99 15.03
677 NASDAQ AMPH Thu, Mar 2, 2017 15.50 15.82 15.13 15.14
676 NASDAQ AMPH Wed, Mar 1, 2017 15.67 15.70 15.45 15.53
675 NASDAQ AMPH Tue, Feb 28, 2017 15.72 15.74 15.26 15.47
674 NASDAQ AMPH Mon, Feb 27, 2017 15.20 15.77 15.11 15.72
673 NASDAQ AMPH Fri, Feb 24, 2017 14.66 15.29 14.66 15.19
672 NASDAQ AMPH Thu, Feb 23, 2017 14.12 14.89 14.09 14.81
671 NASDAQ AMPH Wed, Feb 22, 2017 14.21 14.40 14.00 14.12
670 NASDAQ AMPH Tue, Feb 21, 2017 16.48 16.71 14.09 14.20
669 NASDAQ AMPH Fri, Feb 17, 2017 18.20 18.50 17.88 18.40
668 NASDAQ AMPH Thu, Feb 16, 2017 18.00 18.13 17.33 18.00
667 NASDAQ AMPH Wed, Feb 15, 2017 17.47 18.09 17.45 18.00
666 NASDAQ AMPH Tue, Feb 14, 2017 17.16 17.55 17.11 17.51
665 NASDAQ AMPH Mon, Feb 13, 2017 16.81 17.23 16.73 17.20
664 NASDAQ AMPH Fri, Feb 10, 2017 16.65 16.93 16.61 16.72
663 NASDAQ AMPH Thu, Feb 9, 2017 16.63 16.95 16.57 16.66
662 NASDAQ AMPH Wed, Feb 8, 2017 15.82 16.76 15.68 16.62
661 NASDAQ AMPH Tue, Feb 7, 2017 16.08 16.16 15.76 15.81
660 NASDAQ AMPH Mon, Feb 6, 2017 17.52 17.52 15.92 16.00
659 NASDAQ AMPH Fri, Feb 3, 2017 15.99 16.20 15.80 16.12
658 NASDAQ AMPH Thu, Feb 2, 2017 15.89 16.16 15.76 15.84
657 NASDAQ AMPH Wed, Feb 1, 2017 15.84 16.05 15.65 16.02
656 NASDAQ AMPH Tue, Jan 31, 2017 15.10 15.80 15.03 15.75
655 NASDAQ AMPH Mon, Jan 30, 2017 15.54 15.76 15.05 15.21
654 NASDAQ AMPH Fri, Jan 27, 2017 15.52 15.67 15.30 15.58
653 NASDAQ AMPH Thu, Jan 26, 2017 15.88 16.00 15.51 15.53
652 NASDAQ AMPH Wed, Jan 25, 2017 15.82 16.19 15.82 15.92
651 NASDAQ AMPH Tue, Jan 24, 2017 15.79 15.89 15.50 15.65
650 NASDAQ AMPH Mon, Jan 23, 2017 15.94 16.08 15.63 15.77
649 NASDAQ AMPH Fri, Jan 20, 2017 16.05 16.26 15.64 15.84
648 NASDAQ AMPH Thu, Jan 19, 2017 16.48 16.48 16.00 16.01
647 NASDAQ AMPH Wed, Jan 18, 2017 16.63 16.89 16.38 16.56
646 NASDAQ AMPH Tue, Jan 17, 2017 17.16 17.20 16.31 16.51
645 NASDAQ AMPH Fri, Jan 13, 2017 17.26 17.44 17.09 17.15
644 NASDAQ AMPH Thu, Jan 12, 2017 17.18 17.42 16.98 17.33
643 NASDAQ AMPH Wed, Jan 11, 2017 18.16 18.25 17.11 17.25
642 NASDAQ AMPH Tue, Jan 10, 2017 18.75 19.00 18.02 18.16
641 NASDAQ AMPH Mon, Jan 9, 2017 18.37 18.75 18.15 18.61
640 NASDAQ AMPH Fri, Jan 6, 2017 18.83 18.86 18.29 18.30
639 NASDAQ AMPH Thu, Jan 5, 2017 19.47 19.64 18.60 18.70
638 NASDAQ AMPH Wed, Jan 4, 2017 18.42 19.47 18.32 19.39
637 NASDAQ AMPH Tue, Jan 3, 2017 18.61 18.86 18.33 18.50
636 NASDAQ AMPH Fri, Dec 30, 2016 18.40 18.51 18.32 18.42
635 NASDAQ AMPH Thu, Dec 29, 2016 18.53 18.86 18.30 18.38
634 NASDAQ AMPH Wed, Dec 28, 2016 18.51 18.86 18.13 18.53
633 NASDAQ AMPH Tue, Dec 27, 2016 19.69 19.95 18.38 18.57
632 NASDAQ AMPH Fri, Dec 23, 2016 20.04 20.73 20.04 20.43
631 NASDAQ AMPH Thu, Dec 22, 2016 20.22 20.45 19.95 20.06
630 NASDAQ AMPH Wed, Dec 21, 2016 20.69 20.89 19.80 20.19
629 NASDAQ AMPH Tue, Dec 20, 2016 20.43 20.73 19.93 20.69
628 NASDAQ AMPH Mon, Dec 19, 2016 21.24 21.45 20.15 20.30
627 NASDAQ AMPH Fri, Dec 16, 2016 20.87 21.78 20.84 21.78
626 NASDAQ AMPH Thu, Dec 15, 2016 19.95 20.77 19.84 20.62
625 NASDAQ AMPH Wed, Dec 14, 2016 19.94 20.35 19.71 19.88
624 NASDAQ AMPH Tue, Dec 13, 2016 19.79 20.34 19.71 19.89
623 NASDAQ AMPH Mon, Dec 12, 2016 19.58 19.91 19.42 19.66
622 NASDAQ AMPH Fri, Dec 9, 2016 20.12 20.34 19.65 19.73
621 NASDAQ AMPH Thu, Dec 8, 2016 19.68 20.00 19.34 19.96
620 NASDAQ AMPH Wed, Dec 7, 2016 20.50 20.69 19.36 19.65
619 NASDAQ AMPH Tue, Dec 6, 2016 20.77 20.99 20.31 20.88
618 NASDAQ AMPH Mon, Dec 5, 2016 20.31 21.00 20.25 20.77
617 NASDAQ AMPH Fri, Dec 2, 2016 19.67 20.39 19.55 20.19
616 NASDAQ AMPH Thu, Dec 1, 2016 20.26 20.39 19.57 19.67
615 NASDAQ AMPH Wed, Nov 30, 2016 20.42 20.45 19.81 20.27
614 NASDAQ AMPH Tue, Nov 29, 2016 20.38 20.50 20.04 20.33
613 NASDAQ AMPH Mon, Nov 28, 2016 20.64 20.94 20.29 20.35
612 NASDAQ AMPH Fri, Nov 25, 2016 20.66 20.80 20.33 20.64
611 NASDAQ AMPH Wed, Nov 23, 2016 19.62 20.67 19.15 20.65
610 NASDAQ AMPH Tue, Nov 22, 2016 20.11 20.24 19.72 19.86
609 NASDAQ AMPH Mon, Nov 21, 2016 21.40 21.45 20.01 20.11
608 NASDAQ AMPH Fri, Nov 18, 2016 21.60 21.66 21.05 21.21
607 NASDAQ AMPH Thu, Nov 17, 2016 21.30 21.58 21.03 21.55
606 NASDAQ AMPH Wed, Nov 16, 2016 20.91 21.40 20.70 21.23
605 NASDAQ AMPH Tue, Nov 15, 2016 20.51 21.26 20.21 21.01
604 NASDAQ AMPH Mon, Nov 14, 2016 20.94 20.97 20.30 20.52
603 NASDAQ AMPH Fri, Nov 11, 2016 20.23 20.95 19.89 20.93
602 NASDAQ AMPH Thu, Nov 10, 2016 20.55 20.95 20.24 20.41
601 NASDAQ AMPH Wed, Nov 9, 2016 18.34 20.73 18.34 20.51
600 NASDAQ AMPH Tue, Nov 8, 2016 17.85 18.16 17.41 17.63
599 NASDAQ AMPH Mon, Nov 7, 2016 17.56 18.03 17.56 17.95
598 NASDAQ AMPH Fri, Nov 4, 2016 16.99 17.59 16.87 17.34
597 NASDAQ AMPH Thu, Nov 3, 2016 18.35 18.35 16.95 16.99
596 NASDAQ AMPH Wed, Nov 2, 2016 18.48 18.57 18.04 18.26
595 NASDAQ AMPH Tue, Nov 1, 2016 18.09 18.55 17.96 18.47
594 NASDAQ AMPH Mon, Oct 31, 2016 17.85 18.14 17.64 18.14
593 NASDAQ AMPH Fri, Oct 28, 2016 18.31 18.31 17.37 17.89
592 NASDAQ AMPH Thu, Oct 27, 2016 18.34 18.68 18.24 18.40
591 NASDAQ AMPH Wed, Oct 26, 2016 18.48 18.63 18.05 18.18
590 NASDAQ AMPH Tue, Oct 25, 2016 18.51 18.78 18.38 18.48
589 NASDAQ AMPH Mon, Oct 24, 2016 18.67 18.74 18.39 18.48
588 NASDAQ AMPH Fri, Oct 21, 2016 18.34 18.74 18.08 18.59
587 NASDAQ AMPH Thu, Oct 20, 2016 18.13 18.49 18.06 18.45
586 NASDAQ AMPH Wed, Oct 19, 2016 18.21 18.21 17.86 18.10
585 NASDAQ AMPH Tue, Oct 18, 2016 18.15 18.26 18.04 18.15
584 NASDAQ AMPH Mon, Oct 17, 2016 18.01 18.22 17.66 18.04
583 NASDAQ AMPH Fri, Oct 14, 2016 18.50 18.61 18.00 18.00
582 NASDAQ AMPH Thu, Oct 13, 2016 18.25 18.52 18.09 18.34
581 NASDAQ AMPH Wed, Oct 12, 2016 19.09 19.27 18.40 18.43
580 NASDAQ AMPH Tue, Oct 11, 2016 19.56 19.70 18.86 19.17
579 NASDAQ AMPH Mon, Oct 10, 2016 19.72 19.76 19.46 19.69
578 NASDAQ AMPH Fri, Oct 7, 2016 19.24 19.53 18.99 19.49
577 NASDAQ AMPH Thu, Oct 6, 2016 19.74 19.99 19.05 19.10
576 NASDAQ AMPH Wed, Oct 5, 2016 19.73 19.97 19.63 19.87
575 NASDAQ AMPH Tue, Oct 4, 2016 19.34 19.61 19.27 19.61
574 NASDAQ AMPH Mon, Oct 3, 2016 18.75 19.35 18.57 19.34
573 NASDAQ AMPH Fri, Sep 30, 2016 18.96 19.19 18.69 18.97
572 NASDAQ AMPH Thu, Sep 29, 2016 19.54 19.57 18.68 18.84
571 NASDAQ AMPH Wed, Sep 28, 2016 19.87 19.87 19.45 19.57
570 NASDAQ AMPH Tue, Sep 27, 2016 19.51 20.11 19.36 19.91
569 NASDAQ AMPH Mon, Sep 26, 2016 20.11 20.17 19.26 19.58
568 NASDAQ AMPH Fri, Sep 23, 2016 19.71 20.76 19.50 20.07
567 NASDAQ AMPH Thu, Sep 22, 2016 20.96 21.11 19.65 19.75
566 NASDAQ AMPH Wed, Sep 21, 2016 21.50 21.50 20.17 20.90
565 NASDAQ AMPH Tue, Sep 20, 2016 20.08 21.53 20.08 21.26
564 NASDAQ AMPH Mon, Sep 19, 2016 19.35 19.64 18.87 19.00
563 NASDAQ AMPH Fri, Sep 16, 2016 18.69 19.19 18.65 19.16
562 NASDAQ AMPH Thu, Sep 15, 2016 18.31 18.69 18.28 18.67
561 NASDAQ AMPH Wed, Sep 14, 2016 17.85 18.49 17.65 18.23
560 NASDAQ AMPH Tue, Sep 13, 2016 18.28 18.37 17.19 17.91
559 NASDAQ AMPH Mon, Sep 12, 2016 18.03 18.56 18.01 18.40
558 NASDAQ AMPH Fri, Sep 9, 2016 18.80 18.80 18.13 18.15
557 NASDAQ AMPH Thu, Sep 8, 2016 18.92 19.33 18.74 18.86
556 NASDAQ AMPH Wed, Sep 7, 2016 18.76 19.04 18.60 19.03
555 NASDAQ AMPH Tue, Sep 6, 2016 18.67 19.11 18.64 18.91
554 NASDAQ AMPH Fri, Sep 2, 2016 19.15 19.38 18.47 18.56
553 NASDAQ AMPH Thu, Sep 1, 2016 19.00 19.09 18.49 18.99
552 NASDAQ AMPH Wed, Aug 31, 2016 19.48 19.49 18.37 19.00
551 NASDAQ AMPH Tue, Aug 30, 2016 19.35 19.51 19.18 19.45
550 NASDAQ AMPH Mon, Aug 29, 2016 19.54 19.72 19.17 19.35
549 NASDAQ AMPH Fri, Aug 26, 2016 19.15 19.77 19.12 19.44
548 NASDAQ AMPH Thu, Aug 25, 2016 19.31 19.68 18.91 19.22
547 NASDAQ AMPH Wed, Aug 24, 2016 20.49 21.16 19.22 19.30
546 NASDAQ AMPH Tue, Aug 23, 2016 20.05 20.49 19.77 20.41
545 NASDAQ AMPH Mon, Aug 22, 2016 19.50 20.49 19.37 20.01
544 NASDAQ AMPH Fri, Aug 19, 2016 19.28 19.49 19.15 19.47
543 NASDAQ AMPH Thu, Aug 18, 2016 19.00 19.69 18.84 19.51
542 NASDAQ AMPH Wed, Aug 17, 2016 18.34 19.00 18.14 19.00
541 NASDAQ AMPH Tue, Aug 16, 2016 18.08 18.54 18.05 18.34
540 NASDAQ AMPH Mon, Aug 15, 2016 18.39 18.59 17.98 18.38
539 NASDAQ AMPH Fri, Aug 12, 2016 18.45 18.45 17.94 18.10
538 NASDAQ AMPH Thu, Aug 11, 2016 18.20 18.68 17.95 18.66
537 NASDAQ AMPH Wed, Aug 10, 2016 18.09 18.79 17.96 18.17
536 NASDAQ AMPH Tue, Aug 9, 2016 17.80 18.50 15.82 17.95
535 NASDAQ AMPH Mon, Aug 8, 2016 16.11 16.47 15.90 16.02
534 NASDAQ AMPH Fri, Aug 5, 2016 16.33 16.50 15.93 15.97
533 NASDAQ AMPH Thu, Aug 4, 2016 16.00 16.42 15.95 16.22
532 NASDAQ AMPH Wed, Aug 3, 2016 16.00 16.35 15.90 16.29
531 NASDAQ AMPH Tue, Aug 2, 2016 16.00 16.40 16.00 16.17
530 NASDAQ AMPH Mon, Aug 1, 2016 16.00 16.53 15.87 16.29
529 NASDAQ AMPH Fri, Jul 29, 2016 16.00 16.30 15.62 16.18
528 NASDAQ AMPH Thu, Jul 28, 2016 16.45 16.50 16.24 16.27
527 NASDAQ AMPH Wed, Jul 27, 2016 16.55 16.60 16.34 16.57
526 NASDAQ AMPH Tue, Jul 26, 2016 16.36 16.73 16.28 16.57
525 NASDAQ AMPH Mon, Jul 25, 2016 17.24 17.24 16.25 16.57
524 NASDAQ AMPH Fri, Jul 22, 2016 17.56 17.58 17.20 17.24
523 NASDAQ AMPH Thu, Jul 21, 2016 17.51 17.80 17.35 17.50
522 NASDAQ AMPH Wed, Jul 20, 2016 17.11 17.58 17.11 17.47
521 NASDAQ AMPH Tue, Jul 19, 2016 17.46 17.49 16.97 17.06
520 NASDAQ AMPH Mon, Jul 18, 2016 17.39 17.80 17.38 17.45
519 NASDAQ AMPH Fri, Jul 15, 2016 17.50 17.63 17.33 17.43
518 NASDAQ AMPH Thu, Jul 14, 2016 17.41 17.50 17.06 17.46
517 NASDAQ AMPH Wed, Jul 13, 2016 17.45 17.62 17.09 17.34
516 NASDAQ AMPH Tue, Jul 12, 2016 16.95 17.43 16.84 17.34
515 NASDAQ AMPH Mon, Jul 11, 2016 16.71 16.94 16.60 16.94
514 NASDAQ AMPH Fri, Jul 8, 2016 16.72 16.89 16.47 16.80
513 NASDAQ AMPH Thu, Jul 7, 2016 16.63 16.80 16.34 16.66
512 NASDAQ AMPH Wed, Jul 6, 2016 16.35 16.73 16.24 16.70
511 NASDAQ AMPH Tue, Jul 5, 2016 16.14 16.37 16.10 16.33
510 NASDAQ AMPH Fri, Jul 1, 2016 16.04 16.43 16.04 16.28
509 NASDAQ AMPH Thu, Jun 30, 2016 16.03 16.14 15.79 16.12
508 NASDAQ AMPH Wed, Jun 29, 2016 16.59 16.78 16.02 16.08
507 NASDAQ AMPH Tue, Jun 28, 2016 15.64 16.70 15.64 16.63
506 NASDAQ AMPH Mon, Jun 27, 2016 15.53 15.68 15.12 15.51
505 NASDAQ AMPH Fri, Jun 24, 2016 15.21 15.96 15.00 15.61
504 NASDAQ AMPH Thu, Jun 23, 2016 15.77 16.16 15.64 16.15
503 NASDAQ AMPH Wed, Jun 22, 2016 15.15 15.83 15.08 15.59
502 NASDAQ AMPH Tue, Jun 21, 2016 14.85 15.19 14.64 15.16
501 NASDAQ AMPH Mon, Jun 20, 2016 15.04 15.16 14.67 14.81
500 NASDAQ AMPH Fri, Jun 17, 2016 15.46 15.46 14.80 15.00
499 NASDAQ AMPH Thu, Jun 16, 2016 15.68 15.68 15.30 15.43
498 NASDAQ AMPH Wed, Jun 15, 2016 15.54 15.97 15.54 15.76
497 NASDAQ AMPH Tue, Jun 14, 2016 15.92 16.01 15.53 15.73
496 NASDAQ AMPH Mon, Jun 13, 2016 16.03 16.20 15.72 15.94
495 NASDAQ AMPH Fri, Jun 10, 2016 16.35 16.44 15.94 16.13
494 NASDAQ AMPH Thu, Jun 9, 2016 16.19 16.45 16.07 16.43
493 NASDAQ AMPH Wed, Jun 8, 2016 16.25 16.25 15.91 16.21
492 NASDAQ AMPH Tue, Jun 7, 2016 16.10 16.30 15.53 16.21
491 NASDAQ AMPH Mon, Jun 6, 2016 15.79 16.10 15.48 16.07
490 NASDAQ AMPH Fri, Jun 3, 2016 16.00 16.00 15.43 15.78
489 NASDAQ AMPH Thu, Jun 2, 2016 15.89 16.00 15.84 16.00
488 NASDAQ AMPH Wed, Jun 1, 2016 15.50 15.98 15.33 15.85
487 NASDAQ AMPH Tue, May 31, 2016 15.75 15.93 15.68 15.73
486 NASDAQ AMPH Fri, May 27, 2016 15.47 15.85 15.39 15.75
485 NASDAQ AMPH Thu, May 26, 2016 15.49 15.50 15.24 15.44
484 NASDAQ AMPH Wed, May 25, 2016 15.50 15.60 15.09 15.49
483 NASDAQ AMPH Tue, May 24, 2016 15.25 15.49 15.07 15.48
482 NASDAQ AMPH Mon, May 23, 2016 15.39 15.47 14.92 15.06
481 NASDAQ AMPH Fri, May 20, 2016 14.31 15.47 14.25 15.43
480 NASDAQ AMPH Thu, May 19, 2016 13.99 14.32 13.80 14.28
479 NASDAQ AMPH Wed, May 18, 2016 13.60 14.08 13.38 14.06
478 NASDAQ AMPH Tue, May 17, 2016 13.49 13.79 13.37 13.66
477 NASDAQ AMPH Mon, May 16, 2016 12.98 13.50 12.98 13.46
476 NASDAQ AMPH Fri, May 13, 2016 12.50 13.02 12.27 12.98
475 NASDAQ AMPH Thu, May 12, 2016 12.91 12.91 12.41 12.55
474 NASDAQ AMPH Wed, May 11, 2016 12.98 13.41 12.81 12.82
473 NASDAQ AMPH Tue, May 10, 2016 12.08 13.34 12.05 12.99
472 NASDAQ AMPH Mon, May 9, 2016 11.73 12.06 11.70 11.85
471 NASDAQ AMPH Fri, May 6, 2016 11.80 12.05 11.41 11.72
470 NASDAQ AMPH Thu, May 5, 2016 12.00 12.11 11.80 11.82
469 NASDAQ AMPH Wed, May 4, 2016 12.17 12.28 11.92 11.93
468 NASDAQ AMPH Tue, May 3, 2016 12.23 12.59 12.05 12.25
467 NASDAQ AMPH Mon, May 2, 2016 12.38 12.38 11.97 12.29
466 NASDAQ AMPH Fri, Apr 29, 2016 12.53 12.61 12.25 12.30
465 NASDAQ AMPH Thu, Apr 28, 2016 12.48 12.80 12.31 12.56
464 NASDAQ AMPH Wed, Apr 27, 2016 12.76 12.84 12.48 12.50
463 NASDAQ AMPH Tue, Apr 26, 2016 12.76 12.92 12.48 12.77
462 NASDAQ AMPH Mon, Apr 25, 2016 13.11 13.19 12.70 12.76
461 NASDAQ AMPH Fri, Apr 22, 2016 13.03 13.18 12.30 13.11
460 NASDAQ AMPH Thu, Apr 21, 2016 12.89 13.05 12.76 13.05
459 NASDAQ AMPH Wed, Apr 20, 2016 12.81 13.05 12.78 12.92
458 NASDAQ AMPH Tue, Apr 19, 2016 12.97 13.14 12.85 12.89
457 NASDAQ AMPH Mon, Apr 18, 2016 12.62 12.97 12.61 12.95
456 NASDAQ AMPH Fri, Apr 15, 2016 12.61 12.84 12.55 12.72
455 NASDAQ AMPH Thu, Apr 14, 2016 12.75 12.79 12.58 12.66
454 NASDAQ AMPH Wed, Apr 13, 2016 12.67 12.84 12.50 12.75
453 NASDAQ AMPH Tue, Apr 12, 2016 12.41 12.65 12.28 12.57
452 NASDAQ AMPH Mon, Apr 11, 2016 12.86 12.86 12.37 12.44
451 NASDAQ AMPH Fri, Apr 8, 2016 13.04 13.04 12.69 12.76
450 NASDAQ AMPH Thu, Apr 7, 2016 13.00 13.28 12.83 12.92
449 NASDAQ AMPH Wed, Apr 6, 2016 12.52 13.06 12.45 13.03
448 NASDAQ AMPH Tue, Apr 5, 2016 12.89 12.89 12.89 12.52
447 NASDAQ AMPH Mon, Apr 4, 2016 12.67 13.10 12.64 12.89
446 NASDAQ AMPH Fri, Apr 1, 2016 11.95 12.75 11.90 12.70
445 NASDAQ AMPH Thu, Mar 31, 2016 12.01 12.48 11.97 11.93
444 NASDAQ AMPH Wed, Mar 30, 2016 12.26 12.38 11.90 11.93
443 NASDAQ AMPH Tue, Mar 29, 2016 11.54 12.06 11.37 11.61
442 NASDAQ AMPH Mon, Mar 28, 2016 12.06 12.18 11.57 11.64
441 NASDAQ AMPH Thu, Mar 24, 2016 11.92 11.92 11.92 11.96
440 NASDAQ AMPH Wed, Mar 23, 2016 12.29 12.41 11.86 11.92
439 NASDAQ AMPH Tue, Mar 22, 2016 11.93 12.34 11.87 12.29
438 NASDAQ AMPH Mon, Mar 21, 2016 11.62 12.13 11.53 11.94
437 NASDAQ AMPH Fri, Mar 18, 2016 11.41 11.99 11.25 11.64
436 NASDAQ AMPH Thu, Mar 17, 2016 12.18 12.52 10.92 11.33
435 NASDAQ AMPH Wed, Mar 16, 2016 12.58 12.71 12.10 12.14
434 NASDAQ AMPH Tue, Mar 15, 2016 11.71 11.71 11.71 12.72
433 NASDAQ AMPH Mon, Mar 14, 2016 11.37 11.79 11.31 11.71
432 NASDAQ AMPH Fri, Mar 11, 2016 11.20 11.38 11.08 11.37
431 NASDAQ AMPH Thu, Mar 10, 2016 11.31 11.37 10.97 11.24
430 NASDAQ AMPH Wed, Mar 9, 2016 11.15 11.15 11.15 11.24
429 NASDAQ AMPH Tue, Mar 8, 2016 11.55 11.57 11.08 11.58
428 NASDAQ AMPH Mon, Mar 7, 2016 11.17 11.77 11.17 11.58
427 NASDAQ AMPH Fri, Mar 4, 2016 11.10 11.10 11.10 11.26
426 NASDAQ AMPH Thu, Mar 3, 2016 11.40 11.40 11.40 11.10
425 NASDAQ AMPH Wed, Mar 2, 2016 11.14 11.46 10.82 11.20
424 NASDAQ AMPH Tue, Mar 1, 2016 10.53 10.53 10.53 11.20
423 NASDAQ AMPH Mon, Feb 29, 2016 11.15 11.15 10.51 10.53
422 NASDAQ AMPH Fri, Feb 26, 2016 11.14 11.14 11.14 11.17
421 NASDAQ AMPH Thu, Feb 25, 2016 11.20 11.20 10.97 11.14
420 NASDAQ AMPH Wed, Feb 24, 2016 11.00 11.22 10.82 11.20
419 NASDAQ AMPH Tue, Feb 23, 2016 11.44 11.60 11.11 11.11
418 NASDAQ AMPH Mon, Feb 22, 2016 11.42 11.84 11.17 11.46
417 NASDAQ AMPH Fri, Feb 19, 2016 11.18 11.44 11.03 11.36
416 NASDAQ AMPH Thu, Feb 18, 2016 11.50 11.77 11.15 11.18
415 NASDAQ AMPH Wed, Feb 17, 2016 11.16 11.55 11.02 11.49
414 NASDAQ AMPH Tue, Feb 16, 2016 11.27 11.35 10.99 11.11
413 NASDAQ AMPH Fri, Feb 12, 2016 11.09 11.16 10.81 11.15
412 NASDAQ AMPH Thu, Feb 11, 2016 10.92 11.11 10.71 11.00
411 NASDAQ AMPH Wed, Feb 10, 2016 11.08 11.58 11.05 11.16
410 NASDAQ AMPH Tue, Feb 9, 2016 10.90 11.29 10.78 11.03
409 NASDAQ AMPH Mon, Feb 8, 2016 10.95 11.10 10.71 11.01
408 NASDAQ AMPH Fri, Feb 5, 2016 11.00 11.31 10.95 11.05
407 NASDAQ AMPH Thu, Feb 4, 2016 11.42 11.61 10.94 11.02
406 NASDAQ AMPH Wed, Feb 3, 2016 11.64 11.64 11.09 11.39
405 NASDAQ AMPH Tue, Feb 2, 2016 11.84 11.94 11.51 11.56
404 NASDAQ AMPH Mon, Feb 1, 2016 12.00 12.24 11.74 11.95
403 NASDAQ AMPH Fri, Jan 29, 2016 11.89 12.20 11.60 12.05
402 NASDAQ AMPH Thu, Jan 28, 2016 11.86 12.18 11.71 11.89
401 NASDAQ AMPH Wed, Jan 27, 2016 12.02 12.10 11.71 11.77
400 NASDAQ AMPH Tue, Jan 26, 2016 12.21 12.38 11.81 12.00
399 NASDAQ AMPH Mon, Jan 25, 2016 12.21 12.49 12.06 12.12
398 NASDAQ AMPH Fri, Jan 22, 2016 12.41 12.70 12.16 12.25
397 NASDAQ AMPH Thu, Jan 21, 2016 12.53 12.76 12.11 12.27
396 NASDAQ AMPH Wed, Jan 20, 2016 11.85 12.77 11.72 12.52
395 NASDAQ AMPH Tue, Jan 19, 2016 12.35 12.54 11.89 12.02
394 NASDAQ AMPH Fri, Jan 15, 2016 12.10 12.37 12.00 12.29
393 NASDAQ AMPH Thu, Jan 14, 2016 12.51 12.73 12.05 12.49
392 NASDAQ AMPH Wed, Jan 13, 2016 12.52 12.84 12.21 12.26
391 NASDAQ AMPH Tue, Jan 12, 2016 12.44 12.68 12.15 12.43
390 NASDAQ AMPH Mon, Jan 11, 2016 12.98 12.98 12.11 12.28
389 NASDAQ AMPH Fri, Jan 8, 2016 13.29 13.57 12.93 12.93
388 NASDAQ AMPH Thu, Jan 7, 2016 13.62 13.67 13.20 13.20
387 NASDAQ AMPH Wed, Jan 6, 2016 13.71 14.10 13.68 13.89
386 NASDAQ AMPH Tue, Jan 5, 2016 13.78 14.14 13.74 13.89
385 NASDAQ AMPH Mon, Jan 4, 2016 14.05 14.18 13.68 13.70
384 NASDAQ AMPH Thu, Dec 31, 2015 14.31 14.55 14.16 14.23
383 NASDAQ AMPH Wed, Dec 30, 2015 14.27 14.45 14.12 14.33
382 NASDAQ AMPH Tue, Dec 29, 2015 14.26 14.43 14.11 14.30
381 NASDAQ AMPH Mon, Dec 28, 2015 14.44 14.44 14.07 14.17
380 NASDAQ AMPH Thu, Dec 24, 2015 14.46 14.50 14.26 14.29
379 NASDAQ AMPH Wed, Dec 23, 2015 14.49 14.52 14.40 14.46
378 NASDAQ AMPH Tue, Dec 22, 2015 14.48 14.48 14.14 14.41
377 NASDAQ AMPH Mon, Dec 21, 2015 14.39 14.39 14.15 14.32
376 NASDAQ AMPH Fri, Dec 18, 2015 14.10 14.41 14.01 14.20
375 NASDAQ AMPH Thu, Dec 17, 2015 14.33 14.45 14.02 14.19
374 NASDAQ AMPH Wed, Dec 16, 2015 14.33 14.39 14.01 14.32
373 NASDAQ AMPH Tue, Dec 15, 2015 14.44 14.59 14.20 14.30
372 NASDAQ AMPH Mon, Dec 14, 2015 14.12 14.47 14.12 14.31
371 NASDAQ AMPH Fri, Dec 11, 2015 14.01 14.50 13.82 14.07
370 NASDAQ AMPH Thu, Dec 10, 2015 14.90 14.93 14.17 14.31
369 NASDAQ AMPH Wed, Dec 9, 2015 14.74 14.74 14.09 14.28
368 NASDAQ AMPH Tue, Dec 8, 2015 14.34 14.68 14.34 14.47
367 NASDAQ AMPH Mon, Dec 7, 2015 14.90 14.99 14.33 14.53
366 NASDAQ AMPH Fri, Dec 4, 2015 15.17 15.36 14.82 14.92
365 NASDAQ AMPH Thu, Dec 3, 2015 15.45 15.84 15.05 15.17
364 NASDAQ AMPH Wed, Dec 2, 2015 15.44 15.66 15.28 15.36
363 NASDAQ AMPH Tue, Dec 1, 2015 15.54 15.69 15.05 15.49
362 NASDAQ AMPH Mon, Nov 30, 2015 15.55 15.69 15.02 15.35
361 NASDAQ AMPH Fri, Nov 27, 2015 14.86 15.50 14.72 15.47
360 NASDAQ AMPH Wed, Nov 25, 2015 14.30 14.88 14.29 14.85
359 NASDAQ AMPH Tue, Nov 24, 2015 14.23 14.42 14.02 14.30
358 NASDAQ AMPH Mon, Nov 23, 2015 14.25 14.54 14.25 14.29
357 NASDAQ AMPH Fri, Nov 20, 2015 14.49 14.67 14.13 14.30
356 NASDAQ AMPH Thu, Nov 19, 2015 14.72 14.79 14.28 14.39
355 NASDAQ AMPH Wed, Nov 18, 2015 14.22 14.81 14.12 14.75
354 NASDAQ AMPH Tue, Nov 17, 2015 13.82 14.24 13.61 14.18
353 NASDAQ AMPH Mon, Nov 16, 2015 13.83 14.00 13.22 13.80
352 NASDAQ AMPH Fri, Nov 13, 2015 12.14 13.96 12.08 13.90
351 NASDAQ AMPH Thu, Nov 12, 2015 12.47 12.62 12.20 12.26
350 NASDAQ AMPH Wed, Nov 11, 2015 12.87 13.06 12.52 12.56
349 NASDAQ AMPH Tue, Nov 10, 2015 12.61 13.01 12.37 12.85
348 NASDAQ AMPH Mon, Nov 9, 2015 12.92 13.07 12.54 12.67
347 NASDAQ AMPH Fri, Nov 6, 2015 12.57 12.97 12.28 12.92
346 NASDAQ AMPH Thu, Nov 5, 2015 12.90 12.90 12.47 12.56
345 NASDAQ AMPH Wed, Nov 4, 2015 12.42 13.02 12.24 12.90
344 NASDAQ AMPH Tue, Nov 3, 2015 12.46 12.74 12.29 12.37
343 NASDAQ AMPH Mon, Nov 2, 2015 11.92 12.63 11.78 12.53
342 NASDAQ AMPH Fri, Oct 30, 2015 11.71 11.91 11.53 11.84
341 NASDAQ AMPH Thu, Oct 29, 2015 12.11 12.42 11.64 11.75
340 NASDAQ AMPH Wed, Oct 28, 2015 11.32 12.15 11.17 12.14
339 NASDAQ AMPH Tue, Oct 27, 2015 11.32 11.56 11.11 11.31
338 NASDAQ AMPH Mon, Oct 26, 2015 11.59 11.77 11.17 11.34
337 NASDAQ AMPH Fri, Oct 23, 2015 11.16 11.70 10.96 11.61
336 NASDAQ AMPH Thu, Oct 22, 2015 11.41 11.41 10.57 11.02
335 NASDAQ AMPH Wed, Oct 21, 2015 11.77 11.77 10.96 11.35
334 NASDAQ AMPH Tue, Oct 20, 2015 12.15 12.20 11.54 11.60
333 NASDAQ AMPH Mon, Oct 19, 2015 11.89 12.41 11.54 12.22
332 NASDAQ AMPH Fri, Oct 16, 2015 11.65 12.09 11.60 11.90
331 NASDAQ AMPH Thu, Oct 15, 2015 11.11 11.62 11.05 11.61
330 NASDAQ AMPH Wed, Oct 14, 2015 11.11 11.29 10.88 11.12
329 NASDAQ AMPH Tue, Oct 13, 2015 11.33 11.60 11.00 11.02
328 NASDAQ AMPH Mon, Oct 12, 2015 11.47 11.48 11.05 11.46
327 NASDAQ AMPH Fri, Oct 9, 2015 11.43 11.66 11.24 11.39
326 NASDAQ AMPH Thu, Oct 8, 2015 11.55 11.67 11.17 11.45
325 NASDAQ AMPH Wed, Oct 7, 2015 11.27 11.67 10.93 11.52
324 NASDAQ AMPH Tue, Oct 6, 2015 11.54 11.60 11.08 11.27
323 NASDAQ AMPH Mon, Oct 5, 2015 11.71 12.26 11.32 11.59
322 NASDAQ AMPH Fri, Oct 2, 2015 11.34 11.71 11.26 11.69
321 NASDAQ AMPH Thu, Oct 1, 2015 11.63 11.76 11.06 11.53
320 NASDAQ AMPH Wed, Sep 30, 2015 11.03 11.74 10.97 11.69
319 NASDAQ AMPH Tue, Sep 29, 2015 10.99 11.38 10.61 10.78
318 NASDAQ AMPH Mon, Sep 28, 2015 11.21 11.45 10.83 10.97
317 NASDAQ AMPH Fri, Sep 25, 2015 12.54 12.54 11.36 11.40
316 NASDAQ AMPH Thu, Sep 24, 2015 12.86 12.86 12.00 12.42
315 NASDAQ AMPH Wed, Sep 23, 2015 13.25 13.28 12.78 12.85
314 NASDAQ AMPH Tue, Sep 22, 2015 13.77 13.85 13.11 13.21
313 NASDAQ AMPH Mon, Sep 21, 2015 14.92 14.92 13.64 13.86
312 NASDAQ AMPH Fri, Sep 18, 2015 14.35 15.35 14.35 14.73
311 NASDAQ AMPH Thu, Sep 17, 2015 14.13 14.62 14.06 14.41
310 NASDAQ AMPH Wed, Sep 16, 2015 14.40 14.53 13.89 14.11
309 NASDAQ AMPH Tue, Sep 15, 2015 14.39 14.62 14.03 14.44
308 NASDAQ AMPH Mon, Sep 14, 2015 14.49 14.87 13.90 14.40
307 NASDAQ AMPH Fri, Sep 11, 2015 13.69 14.66 13.69 14.53
306 NASDAQ AMPH Thu, Sep 10, 2015 13.77 14.26 13.57 13.77
305 NASDAQ AMPH Wed, Sep 9, 2015 14.48 14.48 13.77 13.79
304 NASDAQ AMPH Tue, Sep 8, 2015 13.53 14.46 13.46 14.36
303 NASDAQ AMPH Fri, Sep 4, 2015 13.05 13.56 12.88 13.33
302 NASDAQ AMPH Thu, Sep 3, 2015 13.57 13.72 13.04 13.22
301 NASDAQ AMPH Wed, Sep 2, 2015 13.50 13.59 13.17 13.59
300 NASDAQ AMPH Tue, Sep 1, 2015 12.68 13.49 12.52 13.28
299 NASDAQ AMPH Mon, Aug 31, 2015 13.35 13.45 12.78 12.87
298 NASDAQ AMPH Fri, Aug 28, 2015 13.70 13.78 13.18 13.39
297 NASDAQ AMPH Thu, Aug 27, 2015 13.69 13.83 13.36 13.81
296 NASDAQ AMPH Wed, Aug 26, 2015 12.97 13.60 12.85 13.53
295 NASDAQ AMPH Tue, Aug 25, 2015 13.55 13.55 12.62 12.64
294 NASDAQ AMPH Mon, Aug 24, 2015 13.04 13.95 12.18 13.02
293 NASDAQ AMPH Fri, Aug 21, 2015 13.64 14.13 13.54 13.79
292 NASDAQ AMPH Thu, Aug 20, 2015 14.03 14.71 13.83 13.88
291 NASDAQ AMPH Wed, Aug 19, 2015 14.50 14.64 14.06 14.11
290 NASDAQ AMPH Tue, Aug 18, 2015 14.84 14.89 14.50 14.61
289 NASDAQ AMPH Mon, Aug 17, 2015 14.58 14.82 14.32 14.81
288 NASDAQ AMPH Fri, Aug 14, 2015 14.85 15.03 14.12 14.64
287 NASDAQ AMPH Thu, Aug 13, 2015 15.69 16.37 14.90 14.92
286 NASDAQ AMPH Wed, Aug 12, 2015 15.16 15.48 14.87 15.22
285 NASDAQ AMPH Tue, Aug 11, 2015 15.18 15.42 14.86 15.32
284 NASDAQ AMPH Mon, Aug 10, 2015 15.13 15.67 15.11 15.48
283 NASDAQ AMPH Fri, Aug 7, 2015 15.34 15.35 14.67 15.07
282 NASDAQ AMPH Thu, Aug 6, 2015 16.17 16.42 15.31 15.40
281 NASDAQ AMPH Wed, Aug 5, 2015 16.11 16.48 16.10 16.17
280 NASDAQ AMPH Tue, Aug 4, 2015 16.23 16.41 16.02 16.09
279 NASDAQ AMPH Mon, Aug 3, 2015 16.26 16.47 16.04 16.23
278 NASDAQ AMPH Fri, Jul 31, 2015 15.82 16.32 15.67 16.26
277 NASDAQ AMPH Thu, Jul 30, 2015 15.72 15.85 15.46 15.75
276 NASDAQ AMPH Wed, Jul 29, 2015 16.48 16.62 15.80 15.83
275 NASDAQ AMPH Tue, Jul 28, 2015 16.85 16.91 16.34 16.51
274 NASDAQ AMPH Mon, Jul 27, 2015 16.50 16.88 16.28 16.81
273 NASDAQ AMPH Fri, Jul 24, 2015 17.08 17.10 16.43 16.55
272 NASDAQ AMPH Thu, Jul 23, 2015 17.17 17.25 16.96 17.00
271 NASDAQ AMPH Wed, Jul 22, 2015 17.10 17.38 17.00 17.18
270 NASDAQ AMPH Tue, Jul 21, 2015 17.22 17.41 16.96 17.13
269 NASDAQ AMPH Mon, Jul 20, 2015 17.37 17.59 17.21 17.26
268 NASDAQ AMPH Fri, Jul 17, 2015 17.57 17.65 17.29 17.38
267 NASDAQ AMPH Thu, Jul 16, 2015 17.90 18.01 17.50 17.54
266 NASDAQ AMPH Wed, Jul 15, 2015 17.65 18.01 17.52 17.76
265 NASDAQ AMPH Tue, Jul 14, 2015 17.82 17.89 17.40 17.58
264 NASDAQ AMPH Mon, Jul 13, 2015 17.68 18.30 17.62 17.93
263 NASDAQ AMPH Fri, Jul 10, 2015 17.50 17.70 17.36 17.61
262 NASDAQ AMPH Thu, Jul 9, 2015 17.24 17.44 17.05 17.33
261 NASDAQ AMPH Wed, Jul 8, 2015 17.28 17.37 16.91 17.05
260 NASDAQ AMPH Tue, Jul 7, 2015 17.42 17.42 17.03 17.28
259 NASDAQ AMPH Mon, Jul 6, 2015 16.91 17.38 16.90 17.34
258 NASDAQ AMPH Thu, Jul 2, 2015 17.53 17.53 17.04 17.24
257 NASDAQ AMPH Wed, Jul 1, 2015 17.55 17.86 17.43 17.50
256 NASDAQ AMPH Tue, Jun 30, 2015 17.55 17.69 17.30 17.58
255 NASDAQ AMPH Mon, Jun 29, 2015 17.67 17.88 17.20 17.33
254 NASDAQ AMPH Fri, Jun 26, 2015 18.25 18.25 17.65 17.90
253 NASDAQ AMPH Thu, Jun 25, 2015 18.00 18.24 17.81 18.19
252 NASDAQ AMPH Wed, Jun 24, 2015 17.96 18.14 17.79 18.00
251 NASDAQ AMPH Tue, Jun 23, 2015 17.76 17.97 17.56 17.96
250 NASDAQ AMPH Mon, Jun 22, 2015 17.26 17.99 17.26 17.70
249 NASDAQ AMPH Fri, Jun 19, 2015 17.00 17.50 16.89 17.28
248 NASDAQ AMPH Thu, Jun 18, 2015 16.44 17.11 16.40 17.00
247 NASDAQ AMPH Wed, Jun 17, 2015 16.40 16.49 16.26 16.40
246 NASDAQ AMPH Tue, Jun 16, 2015 16.19 16.44 16.09 16.37
245 NASDAQ AMPH Mon, Jun 15, 2015 16.01 16.46 15.88 16.19
244 NASDAQ AMPH Fri, Jun 12, 2015 16.43 16.49 16.02 16.14
243 NASDAQ AMPH Thu, Jun 11, 2015 16.49 16.62 16.37 16.60
242 NASDAQ AMPH Wed, Jun 10, 2015 16.29 16.61 16.23 16.43
241 NASDAQ AMPH Tue, Jun 9, 2015 16.61 16.70 15.81 16.24
240 NASDAQ AMPH Mon, Jun 8, 2015 16.34 16.85 16.34 16.56
239 NASDAQ AMPH Fri, Jun 5, 2015 16.50 16.51 16.28 16.45
238 NASDAQ AMPH Thu, Jun 4, 2015 16.50 16.50 16.17 16.47
237 NASDAQ AMPH Wed, Jun 3, 2015 16.04 16.68 15.78 16.48
236 NASDAQ AMPH Tue, Jun 2, 2015 15.60 16.14 15.43 15.79
235 NASDAQ AMPH Mon, Jun 1, 2015 15.46 15.73 15.14 15.53
234 NASDAQ AMPH Fri, May 29, 2015 14.93 15.40 14.88 15.34
233 NASDAQ AMPH Thu, May 28, 2015 15.09 15.15 14.94 15.13
232 NASDAQ AMPH Wed, May 27, 2015 14.82 15.12 14.67 15.11
231 NASDAQ AMPH Tue, May 26, 2015 14.71 14.93 14.61 14.79
230 NASDAQ AMPH Fri, May 22, 2015 14.62 14.87 14.56 14.80
229 NASDAQ AMPH Thu, May 21, 2015 14.83 15.00 14.61 14.67
228 NASDAQ AMPH Wed, May 20, 2015 14.91 14.91 14.76 14.79
227 NASDAQ AMPH Tue, May 19, 2015 15.00 15.12 14.77 14.89
226 NASDAQ AMPH Mon, May 18, 2015 15.19 15.40 15.02 15.14
225 NASDAQ AMPH Fri, May 15, 2015 15.38 15.48 14.65 15.27
224 NASDAQ AMPH Thu, May 14, 2015 15.00 15.45 14.83 15.41
223 NASDAQ AMPH Wed, May 13, 2015 14.50 15.24 14.50 15.21
222 NASDAQ AMPH Tue, May 12, 2015 14.50 14.71 14.36 14.40
221 NASDAQ AMPH Mon, May 11, 2015 13.95 14.71 13.95 14.62
220 NASDAQ AMPH Fri, May 8, 2015 13.86 14.21 13.71 13.90
219 NASDAQ AMPH Thu, May 7, 2015 13.80 14.04 13.65 13.80
218 NASDAQ AMPH Wed, May 6, 2015 14.12 14.15 13.55 13.80
217 NASDAQ AMPH Tue, May 5, 2015 14.57 14.65 13.99 14.12
216 NASDAQ AMPH Mon, May 4, 2015 14.55 14.78 14.40 14.61
215 NASDAQ AMPH Fri, May 1, 2015 14.58 14.75 14.40 14.60
214 NASDAQ AMPH Thu, Apr 30, 2015 14.95 15.00 14.45 14.46
213 NASDAQ AMPH Wed, Apr 29, 2015 14.90 15.07 14.80 15.05
212 NASDAQ AMPH Tue, Apr 28, 2015 15.07 15.15 14.70 14.96
211 NASDAQ AMPH Mon, Apr 27, 2015 15.33 15.35 14.80 15.03
210 NASDAQ AMPH Fri, Apr 24, 2015 15.29 15.45 15.17 15.25
209 NASDAQ AMPH Thu, Apr 23, 2015 15.03 15.30 14.94 15.29
208 NASDAQ AMPH Wed, Apr 22, 2015 15.18 15.28 15.02 15.08
207 NASDAQ AMPH Tue, Apr 21, 2015 15.10 15.25 14.95 15.21
206 NASDAQ AMPH Mon, Apr 20, 2015 15.15 15.22 14.84 15.10
205 NASDAQ AMPH Fri, Apr 17, 2015 15.22 15.29 14.91 15.11
204 NASDAQ AMPH Thu, Apr 16, 2015 15.20 15.39 14.83 15.31
203 NASDAQ AMPH Wed, Apr 15, 2015 15.30 15.46 15.12 15.28
202 NASDAQ AMPH Tue, Apr 14, 2015 15.20 15.48 15.09 15.22
201 NASDAQ AMPH Mon, Apr 13, 2015 15.37 15.53 15.16 15.24
200 NASDAQ AMPH Fri, Apr 10, 2015 15.02 15.38 14.67 15.34
199 NASDAQ AMPH Thu, Apr 9, 2015 15.11 16.28 14.85 14.99
198 NASDAQ AMPH Wed, Apr 8, 2015 14.87 15.21 14.87 15.09
197 NASDAQ AMPH Tue, Apr 7, 2015 15.09 15.24 14.83 14.85
196 NASDAQ AMPH Mon, Apr 6, 2015 14.91 15.18 14.80 15.05
195 NASDAQ AMPH Thu, Apr 2, 2015 14.98 15.06 14.89 14.95
194 NASDAQ AMPH Wed, Apr 1, 2015 14.88 15.21 14.52 15.02
193 NASDAQ AMPH Tue, Mar 31, 2015 14.96 15.26 14.72 14.96
192 NASDAQ AMPH Mon, Mar 30, 2015 15.47 15.49 14.93 14.96
191 NASDAQ AMPH Fri, Mar 27, 2015 15.01 15.48 14.95 15.43
190 NASDAQ AMPH Thu, Mar 26, 2015 14.57 15.22 14.40 14.95
189 NASDAQ AMPH Wed, Mar 25, 2015 15.50 15.53 14.21 14.42
188 NASDAQ AMPH Tue, Mar 24, 2015 15.20 15.50 14.99 15.33
187 NASDAQ AMPH Mon, Mar 23, 2015 14.64 15.38 14.57 15.36
186 NASDAQ AMPH Fri, Mar 20, 2015 14.43 14.93 14.36 14.74
185 NASDAQ AMPH Thu, Mar 19, 2015 14.76 15.13 14.41 14.44
184 NASDAQ AMPH Wed, Mar 18, 2015 15.00 15.02 14.55 14.82
183 NASDAQ AMPH Tue, Mar 17, 2015 15.30 15.39 14.90 15.15
182 NASDAQ AMPH Mon, Mar 16, 2015 15.47 15.79 15.12 15.27
181 NASDAQ AMPH Fri, Mar 13, 2015 15.50 15.75 15.03 15.51
180 NASDAQ AMPH Thu, Mar 12, 2015 14.97 15.47 14.87 15.46
179 NASDAQ AMPH Wed, Mar 11, 2015 14.95 15.00 14.72 14.86
178 NASDAQ AMPH Tue, Mar 10, 2015 14.91 15.04 14.40 14.99
177 NASDAQ AMPH Mon, Mar 9, 2015 14.68 15.00 14.51 14.97
176 NASDAQ AMPH Fri, Mar 6, 2015 14.52 14.85 14.44 14.78
175 NASDAQ AMPH Thu, Mar 5, 2015 14.58 14.70 14.35 14.50
174 NASDAQ AMPH Wed, Mar 4, 2015 14.01 14.56 13.91 14.49
173 NASDAQ AMPH Tue, Mar 3, 2015 14.08 14.16 13.85 14.02
172 NASDAQ AMPH Mon, Mar 2, 2015 13.93 14.12 13.91 14.04
171 NASDAQ AMPH Fri, Feb 27, 2015 13.79 14.35 13.66 14.00
170 NASDAQ AMPH Thu, Feb 26, 2015 13.59 13.85 13.44 13.85
169 NASDAQ AMPH Wed, Feb 25, 2015 13.70 13.72 13.33 13.64
168 NASDAQ AMPH Tue, Feb 24, 2015 13.55 13.74 13.38 13.60
167 NASDAQ AMPH Mon, Feb 23, 2015 12.80 13.95 12.75 13.55
166 NASDAQ AMPH Fri, Feb 20, 2015 12.80 12.88 12.70 12.85
165 NASDAQ AMPH Thu, Feb 19, 2015 12.73 12.95 12.72 12.86
164 NASDAQ AMPH Wed, Feb 18, 2015 12.80 12.84 12.56 12.74
163 NASDAQ AMPH Tue, Feb 17, 2015 12.70 12.95 12.65 12.83
162 NASDAQ AMPH Fri, Feb 13, 2015 12.70 12.90 12.52 12.76
161 NASDAQ AMPH Thu, Feb 12, 2015 12.91 12.94 12.51 12.74
160 NASDAQ AMPH Wed, Feb 11, 2015 12.91 13.06 12.71 12.90
159 NASDAQ AMPH Tue, Feb 10, 2015 13.04 13.19 12.86 12.98
158 NASDAQ AMPH Mon, Feb 9, 2015 12.63 13.30 12.63 13.03
157 NASDAQ AMPH Fri, Feb 6, 2015 12.87 12.98 12.56 12.75
156 NASDAQ AMPH Thu, Feb 5, 2015 12.88 12.97 12.78 12.90
155 NASDAQ AMPH Wed, Feb 4, 2015 12.26 12.85 12.18 12.80
154 NASDAQ AMPH Tue, Feb 3, 2015 12.51 12.62 12.10 12.37
153 NASDAQ AMPH Mon, Feb 2, 2015 12.11 12.54 12.11 12.49
152 NASDAQ AMPH Fri, Jan 30, 2015 12.42 12.60 12.04 12.13
151 NASDAQ AMPH Thu, Jan 29, 2015 12.22 12.52 12.07 12.51
150 NASDAQ AMPH Wed, Jan 28, 2015 12.44 12.46 12.08 12.21
149 NASDAQ AMPH Tue, Jan 27, 2015 12.21 12.65 12.21 12.47
148 NASDAQ AMPH Mon, Jan 26, 2015 11.87 12.59 11.74 12.24
147 NASDAQ AMPH Fri, Jan 23, 2015 11.71 11.82 11.60 11.77
146 NASDAQ AMPH Thu, Jan 22, 2015 11.79 11.81 11.51 11.73
145 NASDAQ AMPH Wed, Jan 21, 2015 11.84 11.81 11.60 11.70
144 NASDAQ AMPH Tue, Jan 20, 2015 11.97 11.97 11.51 11.90
143 NASDAQ AMPH Fri, Jan 16, 2015 11.26 12.00 11.12 11.92
142 NASDAQ AMPH Thu, Jan 15, 2015 11.96 11.99 11.28 11.31
141 NASDAQ AMPH Wed, Jan 14, 2015 11.74 12.02 11.72 11.99
140 NASDAQ AMPH Tue, Jan 13, 2015 12.05 12.10 11.65 11.85
139 NASDAQ AMPH Mon, Jan 12, 2015 12.03 12.23 11.50 12.00
138 NASDAQ AMPH Fri, Jan 9, 2015 12.32 12.32 11.88 11.98
137 NASDAQ AMPH Thu, Jan 8, 2015 12.85 12.85 12.16 12.25
136 NASDAQ AMPH Wed, Jan 7, 2015 11.87 12.89 11.85 12.78
135 NASDAQ AMPH Tue, Jan 6, 2015 11.91 12.06 11.42 11.81
134 NASDAQ AMPH Mon, Jan 5, 2015 11.75 12.18 11.75 11.83
133 NASDAQ AMPH Fri, Jan 2, 2015 11.67 11.87 11.50 11.84
132 NASDAQ AMPH Wed, Dec 31, 2014 11.58 11.79 11.51 11.61
131 NASDAQ AMPH Tue, Dec 30, 2014 11.64 11.75 11.43 11.51
130 NASDAQ AMPH Mon, Dec 29, 2014 11.84 11.86 11.55 11.72
129 NASDAQ AMPH Fri, Dec 26, 2014 11.75 11.98 11.39 11.84
128 NASDAQ AMPH Wed, Dec 24, 2014 11.75 11.94 11.61 11.74
127 NASDAQ AMPH Tue, Dec 23, 2014 12.18 12.21 11.80 11.83
126 NASDAQ AMPH Mon, Dec 22, 2014 12.09 12.40 11.84 12.20
125 NASDAQ AMPH Fri, Dec 19, 2014 11.86 12.15 11.61 12.04
124 NASDAQ AMPH Thu, Dec 18, 2014 12.00 12.00 11.67 11.90
123 NASDAQ AMPH Wed, Dec 17, 2014 11.25 11.97 11.25 11.94
122 NASDAQ AMPH Tue, Dec 16, 2014 10.89 11.65 10.87 11.28
121 NASDAQ AMPH Mon, Dec 15, 2014 11.82 11.86 10.75 11.03
120 NASDAQ AMPH Fri, Dec 12, 2014 11.59 12.08 11.59 11.73
119 NASDAQ AMPH Thu, Dec 11, 2014 11.90 11.99 11.63 11.71
118 NASDAQ AMPH Wed, Dec 10, 2014 11.98 12.06 11.77 11.91
117 NASDAQ AMPH Tue, Dec 9, 2014 12.21 12.32 11.98 12.03
116 NASDAQ AMPH Mon, Dec 8, 2014 12.15 12.46 11.77 12.39
115 NASDAQ AMPH Fri, Dec 5, 2014 11.77 12.20 11.52 12.13
114 NASDAQ AMPH Thu, Dec 4, 2014 11.37 11.99 11.33 11.84
113 NASDAQ AMPH Wed, Dec 3, 2014 11.00 11.57 10.93 11.43
112 NASDAQ AMPH Tue, Dec 2, 2014 10.83 11.69 10.80 11.00
111 NASDAQ AMPH Mon, Dec 1, 2014 10.50 10.90 10.39 10.88
110 NASDAQ AMPH Fri, Nov 28, 2014 10.67 10.74 10.43 10.43
109 NASDAQ AMPH Wed, Nov 26, 2014 10.60 10.70 10.42 10.61
108 NASDAQ AMPH Tue, Nov 25, 2014 10.58 10.72 10.46 10.62
107 NASDAQ AMPH Mon, Nov 24, 2014 10.60 10.77 10.51 10.60
106 NASDAQ AMPH Fri, Nov 21, 2014 10.58 10.71 10.40 10.56
105 NASDAQ AMPH Thu, Nov 20, 2014 10.17 10.48 10.13 10.48
104 NASDAQ AMPH Wed, Nov 19, 2014 10.28 10.49 10.14 10.21
103 NASDAQ AMPH Tue, Nov 18, 2014 10.31 10.40 9.88 10.37
102 NASDAQ AMPH Mon, Nov 17, 2014 10.28 10.49 10.22 10.32
101 NASDAQ AMPH Fri, Nov 14, 2014 10.81 10.81 10.17 10.25
100 NASDAQ AMPH Thu, Nov 13, 2014 11.77 11.77 10.47 10.71
99 NASDAQ AMPH Wed, Nov 12, 2014 9.90 10.19 9.83 10.05
98 NASDAQ AMPH Tue, Nov 11, 2014 10.00 10.03 9.76 9.93
97 NASDAQ AMPH Mon, Nov 10, 2014 10.11 10.24 9.97 10.03
96 NASDAQ AMPH Fri, Nov 7, 2014 10.12 10.27 9.90 10.09
95 NASDAQ AMPH Thu, Nov 6, 2014 9.92 10.40 9.92 10.17
94 NASDAQ AMPH Wed, Nov 5, 2014 9.95 10.26 9.80 9.95
93 NASDAQ AMPH Tue, Nov 4, 2014 10.00 10.18 9.86 10.00
92 NASDAQ AMPH Mon, Nov 3, 2014 10.20 10.44 9.98 10.00
91 NASDAQ AMPH Fri, Oct 31, 2014 10.08 10.28 9.92 10.14
90 NASDAQ AMPH Thu, Oct 30, 2014 9.97 10.20 9.86 9.94
89 NASDAQ AMPH Wed, Oct 29, 2014 10.18 10.73 9.88 9.96
88 NASDAQ AMPH Tue, Oct 28, 2014 10.15 10.54 10.00 10.21
87 NASDAQ AMPH Mon, Oct 27, 2014 10.06 10.26 10.00 10.14
86 NASDAQ AMPH Fri, Oct 24, 2014 10.11 10.18 10.00 10.07
85 NASDAQ AMPH Thu, Oct 23, 2014 10.22 10.22 10.00 10.09
84 NASDAQ AMPH Wed, Oct 22, 2014 10.27 10.28 10.00 10.17
83 NASDAQ AMPH Tue, Oct 21, 2014 10.37 10.59 10.12 10.22
82 NASDAQ AMPH Mon, Oct 20, 2014 10.40 10.86 10.20 10.31
81 NASDAQ AMPH Fri, Oct 17, 2014 11.00 11.00 10.34 10.39
80 NASDAQ AMPH Thu, Oct 16, 2014 10.32 11.11 10.32 10.97
79 NASDAQ AMPH Wed, Oct 15, 2014 10.87 10.93 10.13 10.49
78 NASDAQ AMPH Tue, Oct 14, 2014 11.17 11.17 10.81 10.99
77 NASDAQ AMPH Mon, Oct 13, 2014 10.92 11.10 10.59 11.03
76 NASDAQ AMPH Fri, Oct 10, 2014 10.97 11.22 10.75 10.94
75 NASDAQ AMPH Thu, Oct 9, 2014 11.00 11.22 10.87 11.02
74 NASDAQ AMPH Wed, Oct 8, 2014 10.95 11.10 10.61 11.00
73 NASDAQ AMPH Tue, Oct 7, 2014 11.29 11.35 10.90 10.91
72 NASDAQ AMPH Mon, Oct 6, 2014 11.40 11.63 11.16 11.35
71 NASDAQ AMPH Fri, Oct 3, 2014 11.28 11.63 11.18 11.41
70 NASDAQ AMPH Thu, Oct 2, 2014 11.18 11.42 11.02 11.15
69 NASDAQ AMPH Wed, Oct 1, 2014 11.65 11.67 11.05 11.12
68 NASDAQ AMPH Tue, Sep 30, 2014 12.00 12.00 11.55 11.65
67 NASDAQ AMPH Mon, Sep 29, 2014 11.85 12.02 11.48 11.96
66 NASDAQ AMPH Fri, Sep 26, 2014 12.08 12.08 11.68 11.83
65 NASDAQ AMPH Thu, Sep 25, 2014 11.95 12.18 11.52 12.00
64 NASDAQ AMPH Wed, Sep 24, 2014 11.46 12.05 11.31 12.00
63 NASDAQ AMPH Tue, Sep 23, 2014 10.95 11.65 10.86 11.49
62 NASDAQ AMPH Mon, Sep 22, 2014 11.32 11.43 10.51 10.95
61 NASDAQ AMPH Fri, Sep 19, 2014 12.14 12.14 11.00 11.28
60 NASDAQ AMPH Thu, Sep 18, 2014 12.20 12.20 11.82 11.96
59 NASDAQ AMPH Wed, Sep 17, 2014 12.20 12.29 11.99 11.99
58 NASDAQ AMPH Tue, Sep 16, 2014 12.31 12.43 12.00 12.18
57 NASDAQ AMPH Mon, Sep 15, 2014 12.00 12.50 11.95 12.19
56 NASDAQ AMPH Fri, Sep 12, 2014 12.00 12.25 11.87 11.91
55 NASDAQ AMPH Thu, Sep 11, 2014 12.49 12.49 12.00 12.14
54 NASDAQ AMPH Wed, Sep 10, 2014 11.86 12.52 11.86 12.23
53 NASDAQ AMPH Tue, Sep 9, 2014 11.81 12.10 11.81 11.97
52 NASDAQ AMPH Mon, Sep 8, 2014 11.94 12.10 11.80 11.91
51 NASDAQ AMPH Fri, Sep 5, 2014 11.81 12.00 11.57 11.92
50 NASDAQ AMPH Thu, Sep 4, 2014 12.00 12.00 11.81 11.86
49 NASDAQ AMPH Wed, Sep 3, 2014 12.00 12.00 11.82 11.99
48 NASDAQ AMPH Tue, Sep 2, 2014 12.11 12.25 11.81 12.00
47 NASDAQ AMPH Fri, Aug 29, 2014 11.55 12.26 11.55 12.09
46 NASDAQ AMPH Thu, Aug 28, 2014 11.41 11.72 11.39 11.58
45 NASDAQ AMPH Wed, Aug 27, 2014 11.50 11.90 11.33 11.36
44 NASDAQ AMPH Tue, Aug 26, 2014 11.56 12.18 11.27 11.50
43 NASDAQ AMPH Mon, Aug 25, 2014 10.15 11.69 10.06 11.46
42 NASDAQ AMPH Fri, Aug 22, 2014 10.00 10.40 10.00 10.12
41 NASDAQ AMPH Thu, Aug 21, 2014 10.03 10.34 9.84 10.07
40 NASDAQ AMPH Wed, Aug 20, 2014 10.05 10.30 9.80 10.08
39 NASDAQ AMPH Tue, Aug 19, 2014 10.05 10.05 9.76 10.01
38 NASDAQ AMPH Mon, Aug 18, 2014 10.14 10.16 9.95 10.02
37 NASDAQ AMPH Fri, Aug 15, 2014 10.37 10.40 10.00 10.15
36 NASDAQ AMPH Thu, Aug 14, 2014 10.15 10.24 10.01 10.13
35 NASDAQ AMPH Wed, Aug 13, 2014 9.80 10.15 9.59 10.15
34 NASDAQ AMPH Tue, Aug 12, 2014 10.11 10.30 9.80 10.20
33 NASDAQ AMPH Mon, Aug 11, 2014 10.03 10.54 9.99 10.00
32 NASDAQ AMPH Fri, Aug 8, 2014 9.45 10.40 9.45 10.00
31 NASDAQ AMPH Thu, Aug 7, 2014 9.68 9.68 9.05 9.45
30 NASDAQ AMPH Wed, Aug 6, 2014 9.37 9.75 9.02 9.44
29 NASDAQ AMPH Tue, Aug 5, 2014 8.75 8.93 8.71 8.75
28 NASDAQ AMPH Mon, Aug 4, 2014 8.97 9.15 8.77 8.83
27 NASDAQ AMPH Fri, Aug 1, 2014 8.84 9.39 8.76 8.84
26 NASDAQ AMPH Thu, Jul 31, 2014 8.92 9.20 8.76 8.88
25 NASDAQ AMPH Wed, Jul 30, 2014 9.11 9.50 8.92 9.04
24 NASDAQ AMPH Tue, Jul 29, 2014 9.04 9.26 8.92 9.12
23 NASDAQ AMPH Mon, Jul 28, 2014 9.05 9.09 8.90 8.97
22 NASDAQ AMPH Fri, Jul 25, 2014 9.05 9.23 8.92 8.98
21 NASDAQ AMPH Thu, Jul 24, 2014 9.20 9.94 9.05 9.22
20 NASDAQ AMPH Wed, Jul 23, 2014 9.35 9.62 9.05 9.14
19 NASDAQ AMPH Tue, Jul 22, 2014 9.11 10.10 9.11 9.50
18 NASDAQ AMPH Mon, Jul 21, 2014 9.70 9.75 9.02 9.35
17 NASDAQ AMPH Fri, Jul 18, 2014 9.50 9.74 9.25 9.55
16 NASDAQ AMPH Thu, Jul 17, 2014 9.45 9.92 9.22 9.58
15 NASDAQ AMPH Wed, Jul 16, 2014 9.52 9.95 9.50 9.65
14 NASDAQ AMPH Tue, Jul 15, 2014 9.68 9.95 9.38 9.49
13 NASDAQ AMPH Mon, Jul 14, 2014 9.24 10.00 9.24 9.83
12 NASDAQ AMPH Fri, Jul 11, 2014 8.60 9.33 8.60 9.29
11 NASDAQ AMPH Thu, Jul 10, 2014 8.64 9.04 8.50 8.69
10 NASDAQ AMPH Wed, Jul 9, 2014 9.00 9.15 8.72 9.05
9 NASDAQ AMPH Tue, Jul 8, 2014 8.60 9.02 8.45 9.00
8 NASDAQ AMPH Mon, Jul 7, 2014 9.10 9.10 8.45 8.75
7 NASDAQ AMPH Thu, Jul 3, 2014 8.98 9.10 8.80 9.07
6 NASDAQ AMPH Wed, Jul 2, 2014 9.75 9.77 8.32 9.14
5 NASDAQ AMPH Tue, Jul 1, 2014 9.90 10.39 9.49 9.75
4 NASDAQ AMPH Mon, Jun 30, 2014 10.00 10.96 9.75 10.01
3 NASDAQ AMPH Fri, Jun 27, 2014 10.25 10.68 9.96 10.50
2 NASDAQ AMPH Thu, Jun 26, 2014 9.00 11.07 8.80 10.01
1 NASDAQ AMPH Wed, Jun 25, 2014 7.00 8.95 6.67 8.75
# Exchange Symbol Date Open High Low Close

Earn Extra Cash Back on Your Investments with Rakuten (formerly Ebates)

Did you know you can earn $30 back on your first $30 of qualifying purchases with Rakuten?

Join now and start saving on every purchase from top retailers like Target, eBay, Zappos, Walmart, Kohl's & CVS. Whether you're shopping for fashion, electronics, home essentials, or health products, Rakuten makes it rewarding.

Sign up through this link and explore the endless possibilities to save and earn cash back!

Popular Posts From Our Blog

Check out the Symbol Surfing blog to learn about investing.