Atara Biotherapeutics Inc NASDAQ:ATRA Historical Prices

Below are the 2393 trading days of historical prices for ATRA.

#	Exchange	Symbol	Date	Open	High	Low	Close
2393	NASDAQ	ATRA	Fri, Apr 19, 2024	0.69	0.71	0.64	0.66
2392	NASDAQ	ATRA	Thu, Apr 18, 2024	0.72	0.74	0.69	0.69
2391	NASDAQ	ATRA	Wed, Apr 17, 2024	0.68	0.73	0.68	0.71
2390	NASDAQ	ATRA	Tue, Apr 16, 2024	0.68	0.72	0.66	0.68
2389	NASDAQ	ATRA	Mon, Apr 15, 2024	0.71	0.71	0.65	0.68
2388	NASDAQ	ATRA	Fri, Apr 12, 2024	0.71	0.74	0.70	0.71
2387	NASDAQ	ATRA	Thu, Apr 11, 2024	0.73	0.75	0.71	0.71
2386	NASDAQ	ATRA	Wed, Apr 10, 2024	0.73	0.75	0.69	0.72
2385	NASDAQ	ATRA	Tue, Apr 9, 2024	0.76	0.77	0.74	0.75
2384	NASDAQ	ATRA	Mon, Apr 8, 2024	0.77	0.81	0.75	0.76
2383	NASDAQ	ATRA	Fri, Apr 5, 2024	0.78	0.83	0.74	0.77
2382	NASDAQ	ATRA	Thu, Apr 4, 2024	0.74	0.83	0.73	0.78
2381	NASDAQ	ATRA	Wed, Apr 3, 2024	0.71	0.74	0.69	0.72
2380	NASDAQ	ATRA	Tue, Apr 2, 2024	0.73	0.75	0.68	0.73
2379	NASDAQ	ATRA	Mon, Apr 1, 2024	0.71	0.73	0.69	0.73
2378	NASDAQ	ATRA	Thu, Mar 28, 2024	0.66	0.72	0.65	0.69
2377	NASDAQ	ATRA	Wed, Mar 27, 2024	0.68	0.72	0.65	0.70
2376	NASDAQ	ATRA	Tue, Mar 26, 2024	0.67	0.68	0.62	0.66
2375	NASDAQ	ATRA	Mon, Mar 25, 2024	0.73	0.75	0.66	0.67
2374	NASDAQ	ATRA	Fri, Mar 22, 2024	0.71	0.71	0.65	0.70
2373	NASDAQ	ATRA	Thu, Mar 21, 2024	0.73	0.75	0.66	0.67
2372	NASDAQ	ATRA	Wed, Mar 20, 2024	0.69	0.74	0.65	0.72
2371	NASDAQ	ATRA	Tue, Mar 19, 2024	0.62	0.69	0.61	0.68
2370	NASDAQ	ATRA	Mon, Mar 18, 2024	0.63	0.63	0.59	0.60
2369	NASDAQ	ATRA	Fri, Mar 15, 2024	0.62	0.66	0.62	0.62
2368	NASDAQ	ATRA	Thu, Mar 14, 2024	0.66	0.66	0.62	0.63
2367	NASDAQ	ATRA	Wed, Mar 13, 2024	0.68	0.72	0.66	0.67
2366	NASDAQ	ATRA	Tue, Mar 12, 2024	0.74	0.75	0.69	0.70
2365	NASDAQ	ATRA	Mon, Mar 11, 2024	0.75	0.79	0.68	0.73
2364	NASDAQ	ATRA	Fri, Mar 8, 2024	0.69	0.82	0.69	0.76
2363	NASDAQ	ATRA	Thu, Mar 7, 2024	0.72	0.72	0.68	0.70
2362	NASDAQ	ATRA	Wed, Mar 6, 2024	0.72	0.72	0.66	0.70
2361	NASDAQ	ATRA	Tue, Mar 5, 2024	0.74	0.75	0.66	0.69
2360	NASDAQ	ATRA	Mon, Mar 4, 2024	0.80	0.80	0.74	0.75
2359	NASDAQ	ATRA	Fri, Mar 1, 2024	0.76	0.83	0.76	0.77
2358	NASDAQ	ATRA	Thu, Feb 29, 2024	0.84	0.94	0.76	0.78
2357	NASDAQ	ATRA	Wed, Feb 28, 2024	0.80	0.83	0.76	0.76
2356	NASDAQ	ATRA	Tue, Feb 27, 2024	0.71	0.84	0.71	0.80
2355	NASDAQ	ATRA	Mon, Feb 26, 2024	0.75	0.80	0.70	0.71
2354	NASDAQ	ATRA	Fri, Feb 23, 2024	0.80	0.81	0.74	0.74
2353	NASDAQ	ATRA	Thu, Feb 22, 2024	0.80	0.83	0.76	0.79
2352	NASDAQ	ATRA	Wed, Feb 21, 2024	0.84	0.87	0.79	0.80
2351	NASDAQ	ATRA	Tue, Feb 20, 2024	0.79	0.89	0.79	0.84
2350	NASDAQ	ATRA	Fri, Feb 16, 2024	0.78	0.79	0.75	0.77
2349	NASDAQ	ATRA	Thu, Feb 15, 2024	0.78	0.80	0.76	0.77
2348	NASDAQ	ATRA	Wed, Feb 14, 2024	0.82	0.82	0.76	0.77
2347	NASDAQ	ATRA	Tue, Feb 13, 2024	0.86	0.87	0.75	0.77
2346	NASDAQ	ATRA	Mon, Feb 12, 2024	0.82	0.86	0.78	0.84
2345	NASDAQ	ATRA	Fri, Feb 9, 2024	0.84	0.89	0.77	0.82
2344	NASDAQ	ATRA	Thu, Feb 8, 2024	0.98	1.00	0.78	0.83
2343	NASDAQ	ATRA	Wed, Feb 7, 2024	1.06	1.09	0.95	0.99
2342	NASDAQ	ATRA	Tue, Feb 6, 2024	1.11	1.15	1.03	1.12
2341	NASDAQ	ATRA	Mon, Feb 5, 2024	1.21	1.27	1.03	1.11
2340	NASDAQ	ATRA	Fri, Feb 2, 2024	0.79	1.58	0.78	1.22
2339	NASDAQ	ATRA	Thu, Feb 1, 2024	0.62	0.83	0.62	0.83
2338	NASDAQ	ATRA	Wed, Jan 31, 2024	0.62	0.66	0.59	0.62
2337	NASDAQ	ATRA	Tue, Jan 30, 2024	0.60	0.63	0.57	0.62
2336	NASDAQ	ATRA	Mon, Jan 29, 2024	0.60	0.61	0.58	0.61
2335	NASDAQ	ATRA	Fri, Jan 26, 2024	0.60	0.66	0.60	0.60
2334	NASDAQ	ATRA	Thu, Jan 25, 2024	0.60	0.61	0.58	0.60
2333	NASDAQ	ATRA	Wed, Jan 24, 2024	0.61	0.62	0.57	0.58
2332	NASDAQ	ATRA	Tue, Jan 23, 2024	0.58	0.62	0.58	0.60
2331	NASDAQ	ATRA	Mon, Jan 22, 2024	0.62	0.64	0.57	0.60
2330	NASDAQ	ATRA	Fri, Jan 19, 2024	0.70	0.73	0.62	0.64
2329	NASDAQ	ATRA	Thu, Jan 18, 2024	0.74	0.74	0.70	0.73
2328	NASDAQ	ATRA	Wed, Jan 17, 2024	0.71	0.78	0.69	0.72
2327	NASDAQ	ATRA	Tue, Jan 16, 2024	0.70	0.77	0.65	0.71
2326	NASDAQ	ATRA	Fri, Jan 12, 2024	0.61	0.72	0.60	0.72
2325	NASDAQ	ATRA	Thu, Jan 11, 2024	0.55	0.63	0.55	0.60
2324	NASDAQ	ATRA	Wed, Jan 10, 2024	0.60	0.60	0.55	0.57
2323	NASDAQ	ATRA	Tue, Jan 9, 2024	0.55	0.59	0.52	0.58
2322	NASDAQ	ATRA	Mon, Jan 8, 2024	0.44	0.57	0.44	0.56
2321	NASDAQ	ATRA	Fri, Jan 5, 2024	0.46	0.49	0.44	0.44
2320	NASDAQ	ATRA	Thu, Jan 4, 2024	0.45	0.46	0.44	0.45
2319	NASDAQ	ATRA	Wed, Jan 3, 2024	0.48	0.50	0.43	0.44
2318	NASDAQ	ATRA	Tue, Jan 2, 2024	0.55	0.55	0.48	0.48
2317	NASDAQ	ATRA	Fri, Dec 29, 2023	0.56	0.59	0.51	0.51
2316	NASDAQ	ATRA	Thu, Dec 28, 2023	0.55	0.60	0.55	0.55
2315	NASDAQ	ATRA	Wed, Dec 27, 2023	0.56	0.58	0.54	0.56
2314	NASDAQ	ATRA	Tue, Dec 26, 2023	0.55	0.57	0.52	0.56
2313	NASDAQ	ATRA	Fri, Dec 22, 2023	0.50	0.56	0.49	0.54
2312	NASDAQ	ATRA	Thu, Dec 21, 2023	0.62	0.69	0.44	0.45
2311	NASDAQ	ATRA	Wed, Dec 20, 2023	0.56	0.61	0.52	0.55
2310	NASDAQ	ATRA	Tue, Dec 19, 2023	0.55	0.57	0.53	0.56
2309	NASDAQ	ATRA	Mon, Dec 18, 2023	0.62	0.63	0.55	0.57
2308	NASDAQ	ATRA	Fri, Dec 15, 2023	0.69	0.69	0.60	0.60
2307	NASDAQ	ATRA	Thu, Dec 14, 2023	0.68	0.69	0.65	0.68
2306	NASDAQ	ATRA	Wed, Dec 13, 2023	0.63	0.69	0.62	0.68
2305	NASDAQ	ATRA	Tue, Dec 12, 2023	0.66	0.68	0.61	0.65
2304	NASDAQ	ATRA	Mon, Dec 11, 2023	0.62	0.67	0.62	0.66
2303	NASDAQ	ATRA	Fri, Dec 8, 2023	0.68	0.70	0.64	0.67
2302	NASDAQ	ATRA	Thu, Dec 7, 2023	0.70	0.71	0.65	0.69
2301	NASDAQ	ATRA	Wed, Dec 6, 2023	0.66	0.69	0.64	0.66
2300	NASDAQ	ATRA	Tue, Dec 5, 2023	0.71	0.71	0.63	0.63
2299	NASDAQ	ATRA	Mon, Dec 4, 2023	0.62	0.72	0.62	0.70
2298	NASDAQ	ATRA	Fri, Dec 1, 2023	0.65	0.65	0.57	0.65
2297	NASDAQ	ATRA	Thu, Nov 30, 2023	0.69	0.77	0.62	0.66
2296	NASDAQ	ATRA	Wed, Nov 29, 2023	0.64	0.71	0.63	0.69
2295	NASDAQ	ATRA	Tue, Nov 28, 2023	0.64	0.65	0.58	0.61
2294	NASDAQ	ATRA	Mon, Nov 27, 2023	0.69	0.69	0.59	0.63
2293	NASDAQ	ATRA	Fri, Nov 24, 2023	0.55	0.72	0.55	0.65
2292	NASDAQ	ATRA	Wed, Nov 22, 2023	0.51	0.57	0.49	0.57
2291	NASDAQ	ATRA	Tue, Nov 21, 2023	0.55	0.57	0.51	0.51
2290	NASDAQ	ATRA	Mon, Nov 20, 2023	0.52	0.58	0.51	0.56
2289	NASDAQ	ATRA	Fri, Nov 17, 2023	0.48	0.61	0.47	0.51
2288	NASDAQ	ATRA	Thu, Nov 16, 2023	0.37	0.50	0.36	0.48
2287	NASDAQ	ATRA	Wed, Nov 15, 2023	0.37	0.40	0.35	0.38
2286	NASDAQ	ATRA	Tue, Nov 14, 2023	0.26	0.36	0.26	0.35
2285	NASDAQ	ATRA	Mon, Nov 13, 2023	0.22	0.26	0.20	0.26
2284	NASDAQ	ATRA	Fri, Nov 10, 2023	0.26	0.27	0.21	0.23
2283	NASDAQ	ATRA	Thu, Nov 9, 2023	0.49	0.49	0.23	0.24
2282	NASDAQ	ATRA	Wed, Nov 8, 2023	1.35	1.35	1.18	1.21
2281	NASDAQ	ATRA	Tue, Nov 7, 2023	1.31	1.41	1.30	1.33
2280	NASDAQ	ATRA	Mon, Nov 6, 2023	1.33	1.40	1.28	1.32
2279	NASDAQ	ATRA	Fri, Nov 3, 2023	1.25	1.35	1.23	1.29
2278	NASDAQ	ATRA	Thu, Nov 2, 2023	1.32	1.33	1.17	1.19
2277	NASDAQ	ATRA	Wed, Nov 1, 2023	1.33	1.34	1.25	1.26
2276	NASDAQ	ATRA	Tue, Oct 31, 2023	1.29	1.33	1.25	1.29
2275	NASDAQ	ATRA	Mon, Oct 30, 2023	1.29	1.35	1.27	1.29
2274	NASDAQ	ATRA	Fri, Oct 27, 2023	1.35	1.35	1.24	1.25
2273	NASDAQ	ATRA	Thu, Oct 26, 2023	1.32	1.37	1.25	1.34
2272	NASDAQ	ATRA	Wed, Oct 25, 2023	1.30	1.35	1.26	1.32
2271	NASDAQ	ATRA	Tue, Oct 24, 2023	1.36	1.45	1.32	1.33
2270	NASDAQ	ATRA	Mon, Oct 23, 2023	1.42	1.42	1.29	1.33
2269	NASDAQ	ATRA	Fri, Oct 20, 2023	1.39	1.43	1.28	1.37
2268	NASDAQ	ATRA	Thu, Oct 19, 2023	1.49	1.50	1.33	1.38
2267	NASDAQ	ATRA	Wed, Oct 18, 2023	1.56	1.56	1.47	1.49
2266	NASDAQ	ATRA	Tue, Oct 17, 2023	1.57	1.64	1.52	1.57
2265	NASDAQ	ATRA	Mon, Oct 16, 2023	1.54	1.61	1.44	1.56
2264	NASDAQ	ATRA	Fri, Oct 13, 2023	1.52	1.56	1.44	1.54
2263	NASDAQ	ATRA	Thu, Oct 12, 2023	1.71	1.71	1.50	1.51
2262	NASDAQ	ATRA	Wed, Oct 11, 2023	1.75	1.83	1.64	1.68
2261	NASDAQ	ATRA	Tue, Oct 10, 2023	1.49	1.79	1.48	1.74
2260	NASDAQ	ATRA	Mon, Oct 9, 2023	1.40	1.54	1.33	1.51
2259	NASDAQ	ATRA	Fri, Oct 6, 2023	1.37	1.44	1.34	1.41
2258	NASDAQ	ATRA	Thu, Oct 5, 2023	1.35	1.41	1.33	1.40
2257	NASDAQ	ATRA	Wed, Oct 4, 2023	1.48	1.48	1.32	1.39
2256	NASDAQ	ATRA	Tue, Oct 3, 2023	1.48	1.54	1.44	1.50
2255	NASDAQ	ATRA	Mon, Oct 2, 2023	1.51	1.53	1.45	1.50
2254	NASDAQ	ATRA	Fri, Sep 29, 2023	1.53	1.53	1.45	1.48
2253	NASDAQ	ATRA	Thu, Sep 28, 2023	1.54	1.55	1.43	1.53
2252	NASDAQ	ATRA	Wed, Sep 27, 2023	1.58	1.64	1.50	1.52
2251	NASDAQ	ATRA	Tue, Sep 26, 2023	1.64	1.78	1.56	1.57
2250	NASDAQ	ATRA	Mon, Sep 25, 2023	1.74	1.77	1.61	1.63
2249	NASDAQ	ATRA	Fri, Sep 22, 2023	1.80	1.86	1.73	1.79
2248	NASDAQ	ATRA	Thu, Sep 21, 2023	1.71	1.95	1.63	1.78
2247	NASDAQ	ATRA	Wed, Sep 20, 2023	1.69	1.96	1.65	1.76
2246	NASDAQ	ATRA	Tue, Sep 19, 2023	1.56	1.61	1.51	1.58
2245	NASDAQ	ATRA	Mon, Sep 18, 2023	1.51	1.58	1.47	1.56
2244	NASDAQ	ATRA	Fri, Sep 15, 2023	1.56	1.56	1.48	1.53
2243	NASDAQ	ATRA	Thu, Sep 14, 2023	1.49	1.58	1.48	1.53
2242	NASDAQ	ATRA	Wed, Sep 13, 2023	1.58	1.58	1.47	1.48
2241	NASDAQ	ATRA	Tue, Sep 12, 2023	1.65	1.73	1.54	1.56
2240	NASDAQ	ATRA	Mon, Sep 11, 2023	1.68	1.68	1.68	1.68
2239	NASDAQ	ATRA	Fri, Sep 8, 2023	1.55	1.55	1.50	1.53
2238	NASDAQ	ATRA	Thu, Sep 7, 2023	1.57	1.57	1.47	1.54
2237	NASDAQ	ATRA	Wed, Sep 6, 2023	1.52	1.58	1.50	1.57
2236	NASDAQ	ATRA	Tue, Sep 5, 2023	1.55	1.60	1.49	1.51
2235	NASDAQ	ATRA	Fri, Sep 1, 2023	1.47	1.59	1.44	1.55
2234	NASDAQ	ATRA	Thu, Aug 31, 2023	1.45	1.54	1.43	1.46
2233	NASDAQ	ATRA	Wed, Aug 30, 2023	1.51	1.53	1.44	1.46
2232	NASDAQ	ATRA	Tue, Aug 29, 2023	1.53	1.58	1.48	1.51
2231	NASDAQ	ATRA	Mon, Aug 28, 2023	1.44	1.54	1.43	1.52
2230	NASDAQ	ATRA	Fri, Aug 25, 2023	1.47	1.49	1.40	1.42
2229	NASDAQ	ATRA	Thu, Aug 24, 2023	1.51	1.54	1.47	1.50
2228	NASDAQ	ATRA	Wed, Aug 23, 2023	1.45	1.56	1.45	1.51
2227	NASDAQ	ATRA	Tue, Aug 22, 2023	1.42	1.47	1.39	1.46
2226	NASDAQ	ATRA	Mon, Aug 21, 2023	1.50	1.50	1.25	1.41
2225	NASDAQ	ATRA	Fri, Aug 18, 2023	1.56	1.62	1.49	1.49
2224	NASDAQ	ATRA	Thu, Aug 17, 2023	1.68	1.70	1.52	1.60
2223	NASDAQ	ATRA	Wed, Aug 16, 2023	1.84	1.87	1.68	1.69
2222	NASDAQ	ATRA	Tue, Aug 15, 2023	1.97	1.98	1.83	1.84
2221	NASDAQ	ATRA	Mon, Aug 14, 2023	2.08	2.09	1.93	1.97
2220	NASDAQ	ATRA	Fri, Aug 11, 2023	2.14	2.15	1.99	2.09
2219	NASDAQ	ATRA	Thu, Aug 10, 2023	1.92	2.32	1.89	2.18
2218	NASDAQ	ATRA	Wed, Aug 9, 2023	2.16	2.16	1.82	1.88
2217	NASDAQ	ATRA	Tue, Aug 8, 2023	2.24	2.36	2.14	2.27
2216	NASDAQ	ATRA	Mon, Aug 7, 2023	2.41	2.43	2.24	2.25
2215	NASDAQ	ATRA	Fri, Aug 4, 2023	2.32	2.54	2.29	2.30
2214	NASDAQ	ATRA	Thu, Aug 3, 2023	2.09	2.40	2.07	2.31
2213	NASDAQ	ATRA	Wed, Aug 2, 2023	2.09	2.14	2.00	2.10
2212	NASDAQ	ATRA	Tue, Aug 1, 2023	2.24	2.24	2.09	2.15
2211	NASDAQ	ATRA	Mon, Jul 31, 2023	2.10	2.32	2.10	2.21
2210	NASDAQ	ATRA	Fri, Jul 28, 2023	1.84	2.08	1.83	2.06
2209	NASDAQ	ATRA	Thu, Jul 27, 2023	1.96	1.98	1.79	1.79
2208	NASDAQ	ATRA	Wed, Jul 26, 2023	1.92	2.04	1.90	1.95
2207	NASDAQ	ATRA	Tue, Jul 25, 2023	2.02	2.09	1.91	1.92
2206	NASDAQ	ATRA	Mon, Jul 24, 2023	2.12	2.12	2.00	2.04
2205	NASDAQ	ATRA	Fri, Jul 21, 2023	2.08	2.23	2.07	2.10
2204	NASDAQ	ATRA	Thu, Jul 20, 2023	2.12	2.14	1.92	2.07
2203	NASDAQ	ATRA	Wed, Jul 19, 2023	2.07	2.23	2.04	2.12
2202	NASDAQ	ATRA	Tue, Jul 18, 2023	1.94	2.14	1.93	2.05
2201	NASDAQ	ATRA	Mon, Jul 17, 2023	1.85	1.97	1.78	1.95
2200	NASDAQ	ATRA	Fri, Jul 14, 2023	2.00	2.00	1.80	1.83
2199	NASDAQ	ATRA	Thu, Jul 13, 2023	2.09	2.13	1.97	1.99
2198	NASDAQ	ATRA	Wed, Jul 12, 2023	2.24	2.29	2.03	2.09
2197	NASDAQ	ATRA	Tue, Jul 11, 2023	1.96	2.21	1.91	2.18
2196	NASDAQ	ATRA	Mon, Jul 10, 2023	1.84	2.00	1.81	1.95
2195	NASDAQ	ATRA	Fri, Jul 7, 2023	1.67	1.86	1.61	1.85
2194	NASDAQ	ATRA	Thu, Jul 6, 2023	1.67	1.69	1.59	1.66
2193	NASDAQ	ATRA	Wed, Jul 5, 2023	1.59	1.73	1.57	1.71
2192	NASDAQ	ATRA	Mon, Jul 3, 2023	1.63	1.63	1.55	1.59
2191	NASDAQ	ATRA	Fri, Jun 30, 2023	1.67	1.67	1.55	1.61
2190	NASDAQ	ATRA	Thu, Jun 29, 2023	1.69	1.72	1.62	1.63
2189	NASDAQ	ATRA	Wed, Jun 28, 2023	1.69	1.75	1.63	1.71
2188	NASDAQ	ATRA	Tue, Jun 27, 2023	1.66	1.75	1.59	1.71
2187	NASDAQ	ATRA	Mon, Jun 26, 2023	1.72	1.74	1.62	1.68
2186	NASDAQ	ATRA	Fri, Jun 23, 2023	1.74	1.81	1.65	1.76
2185	NASDAQ	ATRA	Thu, Jun 22, 2023	1.90	1.92	1.71	1.74
2184	NASDAQ	ATRA	Wed, Jun 21, 2023	1.88	1.98	1.86	1.90
2183	NASDAQ	ATRA	Tue, Jun 20, 2023	2.01	2.01	1.76	1.91
2182	NASDAQ	ATRA	Fri, Jun 16, 2023	2.17	2.19	1.93	2.01
2181	NASDAQ	ATRA	Thu, Jun 15, 2023	2.09	2.19	1.96	2.14
2180	NASDAQ	ATRA	Wed, Jun 14, 2023	2.19	2.28	2.06	2.09
2179	NASDAQ	ATRA	Tue, Jun 13, 2023	1.95	2.19	1.95	2.14
2178	NASDAQ	ATRA	Mon, Jun 12, 2023	2.01	2.10	1.87	1.91
2177	NASDAQ	ATRA	Fri, Jun 9, 2023	1.89	2.05	1.86	1.98
2176	NASDAQ	ATRA	Thu, Jun 8, 2023	1.64	1.92	1.64	1.88
2175	NASDAQ	ATRA	Wed, Jun 7, 2023	1.69	1.70	1.53	1.65
2174	NASDAQ	ATRA	Tue, Jun 6, 2023	1.59	1.72	1.47	1.64
2173	NASDAQ	ATRA	Mon, Jun 5, 2023	1.54	1.59	1.49	1.56
2172	NASDAQ	ATRA	Fri, Jun 2, 2023	1.50	1.57	1.46	1.54
2171	NASDAQ	ATRA	Thu, Jun 1, 2023	1.55	1.56	1.46	1.50
2170	NASDAQ	ATRA	Wed, May 31, 2023	1.61	1.71	1.45	1.53
2169	NASDAQ	ATRA	Tue, May 30, 2023	1.76	1.87	1.62	1.62
2168	NASDAQ	ATRA	Fri, May 26, 2023	1.89	1.93	1.75	1.77
2167	NASDAQ	ATRA	Thu, May 25, 2023	1.92	1.94	1.84	1.92
2166	NASDAQ	ATRA	Wed, May 24, 2023	2.08	2.08	1.86	1.92
2165	NASDAQ	ATRA	Tue, May 23, 2023	2.08	2.29	2.08	2.08
2164	NASDAQ	ATRA	Mon, May 22, 2023	2.12	2.19	2.05	2.10
2163	NASDAQ	ATRA	Fri, May 19, 2023	2.08	2.20	2.06	2.11
2162	NASDAQ	ATRA	Thu, May 18, 2023	2.05	2.14	1.94	2.04
2161	NASDAQ	ATRA	Wed, May 17, 2023	2.07	2.07	1.97	2.06
2160	NASDAQ	ATRA	Tue, May 16, 2023	2.12	2.16	1.95	2.08
2159	NASDAQ	ATRA	Mon, May 15, 2023	2.14	2.31	2.14	2.20
2158	NASDAQ	ATRA	Fri, May 12, 2023	2.33	2.35	2.10	2.14
2157	NASDAQ	ATRA	Thu, May 11, 2023	2.39	2.45	2.27	2.30
2156	NASDAQ	ATRA	Wed, May 10, 2023	2.47	2.48	2.21	2.43
2155	NASDAQ	ATRA	Tue, May 9, 2023	2.86	2.90	2.19	2.44
2154	NASDAQ	ATRA	Mon, May 8, 2023	2.91	3.02	2.86	2.97
2153	NASDAQ	ATRA	Fri, May 5, 2023	2.78	2.97	2.75	2.91
2152	NASDAQ	ATRA	Thu, May 4, 2023	2.67	2.78	2.55	2.75
2151	NASDAQ	ATRA	Wed, May 3, 2023	2.59	2.76	2.56	2.70
2150	NASDAQ	ATRA	Tue, May 2, 2023	2.81	2.81	2.43	2.58
2149	NASDAQ	ATRA	Mon, May 1, 2023	2.70	2.86	2.65	2.81
2148	NASDAQ	ATRA	Fri, Apr 28, 2023	2.57	2.83	2.46	2.71
2147	NASDAQ	ATRA	Thu, Apr 27, 2023	2.76	2.76	2.56	2.58
2146	NASDAQ	ATRA	Wed, Apr 26, 2023	2.87	2.90	2.68	2.73
2145	NASDAQ	ATRA	Tue, Apr 25, 2023	2.90	2.99	2.85	2.86
2144	NASDAQ	ATRA	Mon, Apr 24, 2023	3.00	3.01	2.86	2.94
2143	NASDAQ	ATRA	Fri, Apr 21, 2023	2.84	3.06	2.83	3.04
2142	NASDAQ	ATRA	Thu, Apr 20, 2023	2.94	2.95	2.80	2.84
2141	NASDAQ	ATRA	Wed, Apr 19, 2023	2.90	3.05	2.85	2.98
2140	NASDAQ	ATRA	Tue, Apr 18, 2023	3.06	3.08	2.92	2.96
2139	NASDAQ	ATRA	Mon, Apr 17, 2023	2.70	3.04	2.67	3.03
2138	NASDAQ	ATRA	Fri, Apr 14, 2023	2.61	2.76	2.58	2.69
2137	NASDAQ	ATRA	Thu, Apr 13, 2023	2.37	2.73	2.34	2.71
2136	NASDAQ	ATRA	Wed, Apr 12, 2023	2.61	2.62	2.32	2.36
2135	NASDAQ	ATRA	Tue, Apr 11, 2023	2.74	2.78	2.59	2.59
2134	NASDAQ	ATRA	Mon, Apr 10, 2023	2.75	2.76	2.63	2.73
2133	NASDAQ	ATRA	Thu, Apr 6, 2023	2.81	2.82	2.71	2.77
2132	NASDAQ	ATRA	Wed, Apr 5, 2023	2.83	2.86	2.73	2.78
2131	NASDAQ	ATRA	Tue, Apr 4, 2023	2.97	2.97	2.79	2.85
2130	NASDAQ	ATRA	Mon, Apr 3, 2023	2.86	2.99	2.85	2.94
2129	NASDAQ	ATRA	Fri, Mar 31, 2023	2.85	2.93	2.81	2.90
2128	NASDAQ	ATRA	Thu, Mar 30, 2023	2.98	3.04	2.76	2.80
2127	NASDAQ	ATRA	Wed, Mar 29, 2023	2.96	3.00	2.86	2.98
2126	NASDAQ	ATRA	Tue, Mar 28, 2023	2.96	3.00	2.85	2.86
2125	NASDAQ	ATRA	Mon, Mar 27, 2023	2.89	3.03	2.84	2.97
2124	NASDAQ	ATRA	Fri, Mar 24, 2023	2.79	2.90	2.76	2.87
2123	NASDAQ	ATRA	Thu, Mar 23, 2023	2.92	2.97	2.77	2.86
2122	NASDAQ	ATRA	Wed, Mar 22, 2023	3.01	3.02	2.84	2.87
2121	NASDAQ	ATRA	Tue, Mar 21, 2023	3.02	3.17	3.00	3.02
2120	NASDAQ	ATRA	Mon, Mar 20, 2023	3.02	3.02	2.82	2.98
2119	NASDAQ	ATRA	Fri, Mar 17, 2023	3.06	3.08	2.92	3.02
2118	NASDAQ	ATRA	Thu, Mar 16, 2023	3.05	3.16	2.94	3.09
2117	NASDAQ	ATRA	Wed, Mar 15, 2023	3.06	3.16	2.94	3.08
2116	NASDAQ	ATRA	Tue, Mar 14, 2023	3.12	3.24	3.02	3.18
2115	NASDAQ	ATRA	Mon, Mar 13, 2023	2.81	3.12	2.75	3.12
2114	NASDAQ	ATRA	Fri, Mar 10, 2023	3.12	3.15	2.66	2.83
2113	NASDAQ	ATRA	Thu, Mar 9, 2023	3.31	3.43	3.07	3.12
2112	NASDAQ	ATRA	Wed, Mar 8, 2023	3.27	3.43	3.21	3.28
2111	NASDAQ	ATRA	Tue, Mar 7, 2023	3.42	3.49	3.27	3.27
2110	NASDAQ	ATRA	Mon, Mar 6, 2023	3.61	3.61	3.36	3.43
2109	NASDAQ	ATRA	Fri, Mar 3, 2023	3.70	3.70	3.51	3.61
2108	NASDAQ	ATRA	Thu, Mar 2, 2023	3.80	3.80	3.57	3.58
2107	NASDAQ	ATRA	Wed, Mar 1, 2023	4.04	4.07	3.81	3.91
2106	NASDAQ	ATRA	Tue, Feb 28, 2023	4.09	4.21	4.04	4.05
2105	NASDAQ	ATRA	Mon, Feb 27, 2023	4.13	4.15	4.00	4.08
2104	NASDAQ	ATRA	Fri, Feb 24, 2023	4.19	4.19	4.03	4.06
2103	NASDAQ	ATRA	Thu, Feb 23, 2023	4.25	4.31	4.17	4.27
2102	NASDAQ	ATRA	Wed, Feb 22, 2023	4.09	4.27	4.09	4.23
2101	NASDAQ	ATRA	Tue, Feb 21, 2023	4.38	4.42	4.04	4.07
2100	NASDAQ	ATRA	Fri, Feb 17, 2023	4.37	4.56	4.23	4.52
2099	NASDAQ	ATRA	Thu, Feb 16, 2023	4.45	4.49	4.31	4.34
2098	NASDAQ	ATRA	Wed, Feb 15, 2023	4.57	4.68	4.35	4.53
2097	NASDAQ	ATRA	Tue, Feb 14, 2023	4.39	4.67	4.30	4.64
2096	NASDAQ	ATRA	Mon, Feb 13, 2023	4.23	4.44	4.16	4.44
2095	NASDAQ	ATRA	Fri, Feb 10, 2023	4.62	4.62	4.06	4.26
2094	NASDAQ	ATRA	Thu, Feb 9, 2023	4.77	5.24	4.60	4.77
2093	NASDAQ	ATRA	Wed, Feb 8, 2023	5.46	5.51	4.98	5.04
2092	NASDAQ	ATRA	Tue, Feb 7, 2023	5.46	5.55	5.34	5.46
2091	NASDAQ	ATRA	Mon, Feb 6, 2023	5.14	5.64	5.11	5.40
2090	NASDAQ	ATRA	Fri, Feb 3, 2023	5.27	5.38	5.17	5.17
2089	NASDAQ	ATRA	Thu, Feb 2, 2023	5.24	5.54	5.20	5.46
2088	NASDAQ	ATRA	Wed, Feb 1, 2023	5.08	5.21	4.91	5.13
2087	NASDAQ	ATRA	Tue, Jan 31, 2023	4.93	5.11	4.93	5.07
2086	NASDAQ	ATRA	Mon, Jan 30, 2023	5.20	5.23	4.78	4.89
2085	NASDAQ	ATRA	Fri, Jan 27, 2023	4.94	5.30	4.93	5.27
2084	NASDAQ	ATRA	Thu, Jan 26, 2023	4.86	5.00	4.72	4.94
2083	NASDAQ	ATRA	Wed, Jan 25, 2023	4.68	4.86	4.51	4.82
2082	NASDAQ	ATRA	Tue, Jan 24, 2023	4.16	4.79	4.11	4.72
2081	NASDAQ	ATRA	Mon, Jan 23, 2023	3.90	4.18	3.80	4.16
2080	NASDAQ	ATRA	Fri, Jan 20, 2023	3.62	3.92	3.57	3.89
2079	NASDAQ	ATRA	Thu, Jan 19, 2023	3.60	3.64	3.51	3.55
2078	NASDAQ	ATRA	Wed, Jan 18, 2023	3.82	3.96	3.66	3.67
2077	NASDAQ	ATRA	Tue, Jan 17, 2023	3.99	3.99	3.75	3.78
2076	NASDAQ	ATRA	Fri, Jan 13, 2023	3.75	4.06	3.75	3.89
2075	NASDAQ	ATRA	Thu, Jan 12, 2023	3.67	3.87	3.60	3.86
2074	NASDAQ	ATRA	Wed, Jan 11, 2023	3.62	3.70	3.52	3.66
2073	NASDAQ	ATRA	Tue, Jan 10, 2023	3.52	3.72	3.48	3.62
2072	NASDAQ	ATRA	Mon, Jan 9, 2023	3.56	3.63	3.46	3.51
2071	NASDAQ	ATRA	Fri, Jan 6, 2023	3.59	3.61	3.40	3.50
2070	NASDAQ	ATRA	Thu, Jan 5, 2023	3.41	3.57	3.36	3.56
2069	NASDAQ	ATRA	Wed, Jan 4, 2023	3.29	3.37	3.22	3.35
2068	NASDAQ	ATRA	Tue, Jan 3, 2023	3.31	3.43	3.25	3.28
2067	NASDAQ	ATRA	Fri, Dec 30, 2022	3.11	3.28	3.06	3.28
2066	NASDAQ	ATRA	Thu, Dec 29, 2022	3.09	3.28	2.96	3.14
2065	NASDAQ	ATRA	Wed, Dec 28, 2022	2.87	3.07	2.85	2.99
2064	NASDAQ	ATRA	Tue, Dec 27, 2022	3.05	3.06	2.83	2.85
2063	NASDAQ	ATRA	Fri, Dec 23, 2022	3.18	3.22	2.94	2.99
2062	NASDAQ	ATRA	Thu, Dec 22, 2022	3.24	3.27	2.97	3.21
2061	NASDAQ	ATRA	Wed, Dec 21, 2022	3.66	3.67	3.28	3.31
2060	NASDAQ	ATRA	Tue, Dec 20, 2022	3.42	3.56	3.39	3.50
2059	NASDAQ	ATRA	Mon, Dec 19, 2022	3.58	3.78	3.40	3.42
2058	NASDAQ	ATRA	Fri, Dec 16, 2022	3.51	3.62	3.27	3.52
2057	NASDAQ	ATRA	Thu, Dec 15, 2022	3.81	3.93	3.42	3.46
2056	NASDAQ	ATRA	Wed, Dec 14, 2022	4.08	4.17	3.83	3.88
2055	NASDAQ	ATRA	Tue, Dec 13, 2022	4.49	4.49	3.96	4.10
2054	NASDAQ	ATRA	Mon, Dec 12, 2022	4.42	4.49	4.22	4.32
2053	NASDAQ	ATRA	Fri, Dec 9, 2022	4.72	4.79	4.43	4.45
2052	NASDAQ	ATRA	Thu, Dec 8, 2022	4.76	4.77	4.42	4.74
2051	NASDAQ	ATRA	Wed, Dec 7, 2022	4.44	4.96	4.39	4.66
2050	NASDAQ	ATRA	Tue, Dec 6, 2022	4.65	4.67	4.36	4.48
2049	NASDAQ	ATRA	Mon, Dec 5, 2022	4.75	4.88	4.57	4.65
2048	NASDAQ	ATRA	Fri, Dec 2, 2022	4.32	4.82	4.26	4.76
2047	NASDAQ	ATRA	Thu, Dec 1, 2022	4.55	4.63	4.32	4.40
2046	NASDAQ	ATRA	Wed, Nov 30, 2022	4.21	4.54	4.08	4.53
2045	NASDAQ	ATRA	Tue, Nov 29, 2022	4.08	4.18	4.00	4.17
2044	NASDAQ	ATRA	Mon, Nov 28, 2022	4.17	4.27	4.04	4.09
2043	NASDAQ	ATRA	Fri, Nov 25, 2022	4.24	4.24	4.12	4.18
2042	NASDAQ	ATRA	Wed, Nov 23, 2022	4.22	4.47	4.16	4.17
2041	NASDAQ	ATRA	Tue, Nov 22, 2022	4.16	4.22	4.03	4.21
2040	NASDAQ	ATRA	Mon, Nov 21, 2022	4.22	4.25	4.04	4.13
2039	NASDAQ	ATRA	Fri, Nov 18, 2022	4.40	4.45	4.18	4.27
2038	NASDAQ	ATRA	Thu, Nov 17, 2022	4.48	4.69	4.27	4.31
2037	NASDAQ	ATRA	Wed, Nov 16, 2022	4.93	5.02	4.50	4.57
2036	NASDAQ	ATRA	Tue, Nov 15, 2022	5.42	5.61	4.90	5.01
2035	NASDAQ	ATRA	Mon, Nov 14, 2022	5.07	5.53	5.05	5.18
2034	NASDAQ	ATRA	Fri, Nov 11, 2022	4.77	5.35	4.75	5.13
2033	NASDAQ	ATRA	Thu, Nov 10, 2022	3.98	4.90	3.96	4.81
2032	NASDAQ	ATRA	Wed, Nov 9, 2022	4.60	4.67	3.88	3.88
2031	NASDAQ	ATRA	Tue, Nov 8, 2022	4.79	5.20	4.70	4.90
2030	NASDAQ	ATRA	Mon, Nov 7, 2022	4.80	4.98	4.65	4.73
2029	NASDAQ	ATRA	Fri, Nov 4, 2022	4.80	4.87	4.54	4.75
2028	NASDAQ	ATRA	Thu, Nov 3, 2022	4.55	4.81	4.50	4.65
2027	NASDAQ	ATRA	Wed, Nov 2, 2022	4.82	4.97	4.64	4.67
2026	NASDAQ	ATRA	Tue, Nov 1, 2022	4.78	5.01	4.68	4.83
2025	NASDAQ	ATRA	Mon, Oct 31, 2022	4.79	4.83	4.56	4.66
2024	NASDAQ	ATRA	Fri, Oct 28, 2022	4.61	4.86	4.42	4.83
2023	NASDAQ	ATRA	Thu, Oct 27, 2022	4.83	4.87	4.51	4.56
2022	NASDAQ	ATRA	Wed, Oct 26, 2022	4.68	4.95	4.51	4.73
2021	NASDAQ	ATRA	Tue, Oct 25, 2022	4.44	4.79	4.39	4.69
2020	NASDAQ	ATRA	Mon, Oct 24, 2022	4.25	4.45	3.99	4.40
2019	NASDAQ	ATRA	Fri, Oct 21, 2022	3.78	4.25	3.67	4.23
2018	NASDAQ	ATRA	Thu, Oct 20, 2022	3.63	3.95	3.60	3.76
2017	NASDAQ	ATRA	Wed, Oct 19, 2022	4.16	4.16	3.59	3.65
2016	NASDAQ	ATRA	Tue, Oct 18, 2022	4.05	4.21	3.99	4.14
2015	NASDAQ	ATRA	Mon, Oct 17, 2022	3.81	4.04	3.75	3.99
2014	NASDAQ	ATRA	Fri, Oct 14, 2022	4.14	4.16	3.69	3.73
2013	NASDAQ	ATRA	Thu, Oct 13, 2022	3.70	3.99	3.54	3.99
2012	NASDAQ	ATRA	Wed, Oct 12, 2022	4.04	4.11	3.64	3.94
2011	NASDAQ	ATRA	Tue, Oct 11, 2022	3.78	4.18	3.72	4.04
2010	NASDAQ	ATRA	Mon, Oct 10, 2022	3.80	3.94	3.61	3.80
2009	NASDAQ	ATRA	Fri, Oct 7, 2022	4.05	4.06	3.79	3.82
2008	NASDAQ	ATRA	Thu, Oct 6, 2022	4.09	4.23	4.03	4.18
2007	NASDAQ	ATRA	Wed, Oct 5, 2022	4.09	4.21	3.95	4.11
2006	NASDAQ	ATRA	Tue, Oct 4, 2022	3.93	4.23	3.93	4.22
2005	NASDAQ	ATRA	Mon, Oct 3, 2022	3.92	3.96	3.65	3.85
2004	NASDAQ	ATRA	Fri, Sep 30, 2022	3.56	3.97	3.56	3.78
2003	NASDAQ	ATRA	Thu, Sep 29, 2022	3.94	3.94	3.59	3.63
2002	NASDAQ	ATRA	Wed, Sep 28, 2022	3.42	3.92	3.42	3.84
2001	NASDAQ	ATRA	Tue, Sep 27, 2022	3.45	3.49	3.24	3.33
2000	NASDAQ	ATRA	Mon, Sep 26, 2022	3.34	3.51	3.34	3.39
1999	NASDAQ	ATRA	Fri, Sep 23, 2022	3.38	3.41	3.23	3.31
1998	NASDAQ	ATRA	Thu, Sep 22, 2022	3.59	3.59	3.39	3.41
1997	NASDAQ	ATRA	Wed, Sep 21, 2022	3.90	3.90	3.58	3.59
1996	NASDAQ	ATRA	Tue, Sep 20, 2022	3.83	3.95	3.74	3.80
1995	NASDAQ	ATRA	Mon, Sep 19, 2022	3.98	4.00	3.63	3.81
1994	NASDAQ	ATRA	Fri, Sep 16, 2022	4.62	4.62	3.90	4.04
1993	NASDAQ	ATRA	Thu, Sep 15, 2022	4.67	4.82	4.57	4.70
1992	NASDAQ	ATRA	Wed, Sep 14, 2022	4.57	4.74	4.50	4.70
1991	NASDAQ	ATRA	Tue, Sep 13, 2022	4.76	4.87	4.53	4.57
1990	NASDAQ	ATRA	Mon, Sep 12, 2022	4.85	5.02	4.76	4.91
1989	NASDAQ	ATRA	Fri, Sep 9, 2022	4.80	4.95	4.71	4.82
1988	NASDAQ	ATRA	Thu, Sep 8, 2022	4.49	4.78	4.42	4.75
1987	NASDAQ	ATRA	Wed, Sep 7, 2022	4.24	4.56	4.19	4.55
1986	NASDAQ	ATRA	Tue, Sep 6, 2022	4.29	4.31	4.11	4.23
1985	NASDAQ	ATRA	Fri, Sep 2, 2022	4.42	4.56	4.25	4.29
1984	NASDAQ	ATRA	Thu, Sep 1, 2022	4.01	4.38	3.90	4.35
1983	NASDAQ	ATRA	Wed, Aug 31, 2022	4.01	4.12	3.98	4.01
1982	NASDAQ	ATRA	Tue, Aug 30, 2022	4.07	4.16	3.91	3.96
1981	NASDAQ	ATRA	Mon, Aug 29, 2022	3.96	4.12	3.86	4.03
1980	NASDAQ	ATRA	Fri, Aug 26, 2022	4.56	4.57	4.01	4.03
1979	NASDAQ	ATRA	Thu, Aug 25, 2022	4.63	4.73	4.48	4.56
1978	NASDAQ	ATRA	Wed, Aug 24, 2022	4.21	4.62	4.12	4.60
1977	NASDAQ	ATRA	Tue, Aug 23, 2022	4.24	4.36	4.07	4.23
1976	NASDAQ	ATRA	Mon, Aug 22, 2022	4.43	4.51	4.16	4.18
1975	NASDAQ	ATRA	Fri, Aug 19, 2022	4.59	4.70	4.40	4.45
1974	NASDAQ	ATRA	Thu, Aug 18, 2022	4.72	4.76	4.51	4.74
1973	NASDAQ	ATRA	Wed, Aug 17, 2022	4.86	5.02	4.64	4.72
1972	NASDAQ	ATRA	Tue, Aug 16, 2022	5.31	5.34	4.83	4.94
1971	NASDAQ	ATRA	Mon, Aug 15, 2022	5.87	5.94	5.25	5.34
1970	NASDAQ	ATRA	Fri, Aug 12, 2022	4.70	5.87	4.67	5.84
1969	NASDAQ	ATRA	Thu, Aug 11, 2022	4.92	5.16	4.59	4.65
1968	NASDAQ	ATRA	Wed, Aug 10, 2022	4.77	5.02	4.46	4.95
1967	NASDAQ	ATRA	Tue, Aug 9, 2022	3.85	4.92	3.69	4.69
1966	NASDAQ	ATRA	Mon, Aug 8, 2022	3.58	3.74	3.52	3.63
1965	NASDAQ	ATRA	Fri, Aug 5, 2022	3.30	3.46	3.17	3.44
1964	NASDAQ	ATRA	Thu, Aug 4, 2022	3.23	3.40	3.20	3.38
1963	NASDAQ	ATRA	Wed, Aug 3, 2022	3.02	3.43	3.02	3.17
1962	NASDAQ	ATRA	Tue, Aug 2, 2022	2.85	3.06	2.85	2.97
1961	NASDAQ	ATRA	Mon, Aug 1, 2022	3.01	3.06	2.83	2.85
1960	NASDAQ	ATRA	Fri, Jul 29, 2022	3.15	3.18	2.98	3.03
1959	NASDAQ	ATRA	Thu, Jul 28, 2022	3.24	3.25	3.07	3.18
1958	NASDAQ	ATRA	Wed, Jul 27, 2022	3.21	3.30	3.11	3.27
1957	NASDAQ	ATRA	Tue, Jul 26, 2022	3.15	3.35	3.03	3.15
1956	NASDAQ	ATRA	Mon, Jul 25, 2022	3.22	3.27	3.15	3.17
1955	NASDAQ	ATRA	Fri, Jul 22, 2022	3.59	3.62	3.20	3.22
1954	NASDAQ	ATRA	Thu, Jul 21, 2022	3.71	3.77	3.57	3.58
1953	NASDAQ	ATRA	Wed, Jul 20, 2022	3.45	3.80	3.44	3.73
1952	NASDAQ	ATRA	Tue, Jul 19, 2022	3.80	3.92	3.59	3.64
1951	NASDAQ	ATRA	Mon, Jul 18, 2022	3.88	4.04	3.74	3.75
1950	NASDAQ	ATRA	Fri, Jul 15, 2022	3.96	3.96	3.74	3.85
1949	NASDAQ	ATRA	Thu, Jul 14, 2022	4.06	4.16	3.74	3.95
1948	NASDAQ	ATRA	Wed, Jul 13, 2022	4.15	4.15	3.41	3.89
1947	NASDAQ	ATRA	Tue, Jul 12, 2022	7.40	8.85	7.18	8.66
1946	NASDAQ	ATRA	Mon, Jul 11, 2022	8.34	8.79	7.38	7.40
1945	NASDAQ	ATRA	Fri, Jul 8, 2022	8.43	8.77	8.29	8.50
1944	NASDAQ	ATRA	Thu, Jul 7, 2022	8.76	9.13	8.57	8.69
1943	NASDAQ	ATRA	Wed, Jul 6, 2022	8.75	9.34	8.66	8.70
1942	NASDAQ	ATRA	Tue, Jul 5, 2022	8.08	8.85	8.03	8.73
1941	NASDAQ	ATRA	Fri, Jul 1, 2022	7.79	8.38	7.73	8.30
1940	NASDAQ	ATRA	Thu, Jun 30, 2022	7.42	7.86	7.21	7.79
1939	NASDAQ	ATRA	Wed, Jun 29, 2022	6.54	7.63	6.50	7.58
1938	NASDAQ	ATRA	Tue, Jun 28, 2022	7.11	7.15	6.51	6.55
1937	NASDAQ	ATRA	Mon, Jun 27, 2022	7.11	7.27	6.96	7.03
1936	NASDAQ	ATRA	Fri, Jun 24, 2022	7.40	7.68	7.09	7.31
1935	NASDAQ	ATRA	Thu, Jun 23, 2022	6.85	7.35	6.85	7.35
1934	NASDAQ	ATRA	Wed, Jun 22, 2022	6.26	7.06	6.18	6.80
1933	NASDAQ	ATRA	Tue, Jun 21, 2022	5.93	6.65	5.87	6.46
1932	NASDAQ	ATRA	Fri, Jun 17, 2022	5.12	6.07	5.12	5.87
1931	NASDAQ	ATRA	Thu, Jun 16, 2022	5.32	5.41	4.91	5.05
1930	NASDAQ	ATRA	Wed, Jun 15, 2022	5.21	5.63	5.16	5.55
1929	NASDAQ	ATRA	Tue, Jun 14, 2022	5.18	5.26	5.05	5.16
1928	NASDAQ	ATRA	Mon, Jun 13, 2022	5.08	5.14	4.92	5.07
1927	NASDAQ	ATRA	Fri, Jun 10, 2022	5.53	5.53	5.03	5.22
1926	NASDAQ	ATRA	Thu, Jun 9, 2022	5.80	5.85	5.66	5.67
1925	NASDAQ	ATRA	Wed, Jun 8, 2022	5.63	6.06	5.60	5.88
1924	NASDAQ	ATRA	Tue, Jun 7, 2022	5.09	5.70	5.05	5.67
1923	NASDAQ	ATRA	Mon, Jun 6, 2022	5.25	5.68	5.12	5.19
1922	NASDAQ	ATRA	Fri, Jun 3, 2022	4.80	5.16	4.77	5.14
1921	NASDAQ	ATRA	Thu, Jun 2, 2022	4.77	4.86	4.66	4.83
1920	NASDAQ	ATRA	Wed, Jun 1, 2022	5.26	5.33	4.66	4.83
1919	NASDAQ	ATRA	Tue, May 31, 2022	5.16	5.24	5.00	5.20
1918	NASDAQ	ATRA	Fri, May 27, 2022	4.89	5.23	4.79	5.21
1917	NASDAQ	ATRA	Thu, May 26, 2022	4.84	5.09	4.84	4.87
1916	NASDAQ	ATRA	Wed, May 25, 2022	4.70	4.99	4.65	4.84
1915	NASDAQ	ATRA	Tue, May 24, 2022	4.85	4.96	4.61	4.69
1914	NASDAQ	ATRA	Mon, May 23, 2022	5.25	5.33	4.84	4.98
1913	NASDAQ	ATRA	Fri, May 20, 2022	5.15	5.29	4.70	5.16
1912	NASDAQ	ATRA	Thu, May 19, 2022	5.15	5.35	5.00	5.16
1911	NASDAQ	ATRA	Wed, May 18, 2022	5.36	5.43	4.97	5.13
1910	NASDAQ	ATRA	Tue, May 17, 2022	5.49	5.64	5.37	5.59
1909	NASDAQ	ATRA	Mon, May 16, 2022	5.47	5.47	5.20	5.30
1908	NASDAQ	ATRA	Fri, May 13, 2022	5.38	5.67	5.24	5.48
1907	NASDAQ	ATRA	Thu, May 12, 2022	4.87	5.47	4.84	5.22
1906	NASDAQ	ATRA	Wed, May 11, 2022	5.63	5.76	4.99	5.00
1905	NASDAQ	ATRA	Tue, May 10, 2022	5.98	6.54	5.43	5.69
1904	NASDAQ	ATRA	Mon, May 9, 2022	6.72	6.93	5.55	5.72
1903	NASDAQ	ATRA	Fri, May 6, 2022	6.50	7.14	6.40	6.92
1902	NASDAQ	ATRA	Thu, May 5, 2022	7.21	7.29	6.68	6.82
1901	NASDAQ	ATRA	Wed, May 4, 2022	7.04	7.32	6.64	7.31
1900	NASDAQ	ATRA	Tue, May 3, 2022	6.79	7.10	6.74	7.04
1899	NASDAQ	ATRA	Mon, May 2, 2022	6.41	6.95	6.39	6.94
1898	NASDAQ	ATRA	Fri, Apr 29, 2022	6.67	6.80	6.31	6.36
1897	NASDAQ	ATRA	Thu, Apr 28, 2022	6.78	6.88	6.33	6.72
1896	NASDAQ	ATRA	Wed, Apr 27, 2022	6.68	6.84	6.59	6.61
1895	NASDAQ	ATRA	Tue, Apr 26, 2022	7.25	7.34	6.67	6.72
1894	NASDAQ	ATRA	Mon, Apr 25, 2022	7.22	7.37	7.04	7.29
1893	NASDAQ	ATRA	Fri, Apr 22, 2022	7.39	7.48	7.14	7.26
1892	NASDAQ	ATRA	Thu, Apr 21, 2022	7.87	7.94	7.31	7.39
1891	NASDAQ	ATRA	Wed, Apr 20, 2022	7.93	7.93	7.69	7.74
1890	NASDAQ	ATRA	Tue, Apr 19, 2022	7.77	8.15	7.65	7.89
1889	NASDAQ	ATRA	Mon, Apr 18, 2022	8.10	8.10	7.55	7.73
1888	NASDAQ	ATRA	Thu, Apr 14, 2022	8.38	8.38	7.65	8.01
1887	NASDAQ	ATRA	Wed, Apr 13, 2022	8.36	8.50	8.20	8.41
1886	NASDAQ	ATRA	Tue, Apr 12, 2022	8.44	8.68	8.18	8.21
1885	NASDAQ	ATRA	Mon, Apr 11, 2022	8.82	8.82	8.31	8.34
1884	NASDAQ	ATRA	Fri, Apr 8, 2022	9.10	9.17	8.73	8.76
1883	NASDAQ	ATRA	Thu, Apr 7, 2022	9.33	9.46	8.88	9.07
1882	NASDAQ	ATRA	Wed, Apr 6, 2022	9.16	9.55	9.16	9.41
1881	NASDAQ	ATRA	Tue, Apr 5, 2022	9.75	9.96	9.25	9.29
1880	NASDAQ	ATRA	Mon, Apr 4, 2022	9.54	10.01	9.47	9.84
1879	NASDAQ	ATRA	Fri, Apr 1, 2022	9.39	9.64	9.15	9.50
1878	NASDAQ	ATRA	Thu, Mar 31, 2022	9.37	9.55	9.18	9.29
1877	NASDAQ	ATRA	Wed, Mar 30, 2022	9.50	9.80	9.07	9.18
1876	NASDAQ	ATRA	Tue, Mar 29, 2022	9.53	9.84	9.46	9.72
1875	NASDAQ	ATRA	Mon, Mar 28, 2022	9.45	9.64	9.20	9.36
1874	NASDAQ	ATRA	Fri, Mar 25, 2022	9.57	9.59	9.34	9.40
1873	NASDAQ	ATRA	Thu, Mar 24, 2022	9.46	9.65	9.28	9.62
1872	NASDAQ	ATRA	Wed, Mar 23, 2022	9.58	9.76	9.23	9.30
1871	NASDAQ	ATRA	Tue, Mar 22, 2022	9.50	9.90	9.37	9.82
1870	NASDAQ	ATRA	Mon, Mar 21, 2022	9.78	9.84	9.29	9.41
1869	NASDAQ	ATRA	Fri, Mar 18, 2022	9.40	9.99	9.35	9.79
1868	NASDAQ	ATRA	Thu, Mar 17, 2022	9.15	9.58	9.07	9.55
1867	NASDAQ	ATRA	Wed, Mar 16, 2022	8.70	9.27	8.58	9.24
1866	NASDAQ	ATRA	Tue, Mar 15, 2022	8.47	8.74	8.39	8.51
1865	NASDAQ	ATRA	Mon, Mar 14, 2022	8.88	9.32	8.28	8.44
1864	NASDAQ	ATRA	Fri, Mar 11, 2022	9.29	9.61	9.00	9.02
1863	NASDAQ	ATRA	Thu, Mar 10, 2022	9.19	9.28	8.87	9.26
1862	NASDAQ	ATRA	Wed, Mar 9, 2022	9.26	9.69	9.19	9.30
1861	NASDAQ	ATRA	Tue, Mar 8, 2022	8.54	9.09	8.24	9.00
1860	NASDAQ	ATRA	Mon, Mar 7, 2022	9.00	9.11	8.54	8.59
1859	NASDAQ	ATRA	Fri, Mar 4, 2022	9.45	9.50	8.63	8.85
1858	NASDAQ	ATRA	Thu, Mar 3, 2022	9.92	10.09	9.16	9.41
1857	NASDAQ	ATRA	Wed, Mar 2, 2022	10.11	10.48	9.52	9.80
1856	NASDAQ	ATRA	Tue, Mar 1, 2022	12.10	12.83	9.93	10.21
1855	NASDAQ	ATRA	Mon, Feb 28, 2022	13.11	13.30	12.63	12.85
1854	NASDAQ	ATRA	Fri, Feb 25, 2022	13.37	13.37	12.79	13.19
1853	NASDAQ	ATRA	Thu, Feb 24, 2022	12.10	13.28	11.84	13.22
1852	NASDAQ	ATRA	Wed, Feb 23, 2022	13.40	13.40	12.72	12.76
1851	NASDAQ	ATRA	Tue, Feb 22, 2022	12.82	13.61	12.82	13.22
1850	NASDAQ	ATRA	Fri, Feb 18, 2022	11.76	13.15	11.50	13.12
1849	NASDAQ	ATRA	Thu, Feb 17, 2022	14.60	14.66	13.55	13.68
1848	NASDAQ	ATRA	Wed, Feb 16, 2022	14.97	14.97	14.32	14.74
1847	NASDAQ	ATRA	Tue, Feb 15, 2022	14.37	15.09	14.37	14.97
1846	NASDAQ	ATRA	Mon, Feb 14, 2022	14.72	14.72	14.08	14.24
1845	NASDAQ	ATRA	Fri, Feb 11, 2022	15.05	15.28	14.48	14.56
1844	NASDAQ	ATRA	Thu, Feb 10, 2022	15.33	16.07	14.69	15.01
1843	NASDAQ	ATRA	Wed, Feb 9, 2022	15.07	15.93	15.07	15.73
1842	NASDAQ	ATRA	Tue, Feb 8, 2022	15.11	15.35	14.80	15.22
1841	NASDAQ	ATRA	Mon, Feb 7, 2022	14.46	15.31	14.46	15.20
1840	NASDAQ	ATRA	Fri, Feb 4, 2022	14.60	14.96	14.26	14.61
1839	NASDAQ	ATRA	Thu, Feb 3, 2022	14.62	14.94	14.47	14.75
1838	NASDAQ	ATRA	Wed, Feb 2, 2022	15.43	15.70	14.48	14.75
1837	NASDAQ	ATRA	Tue, Feb 1, 2022	15.36	15.85	15.01	15.47
1836	NASDAQ	ATRA	Mon, Jan 31, 2022	14.61	15.39	14.61	15.36
1835	NASDAQ	ATRA	Fri, Jan 28, 2022	14.16	14.87	13.94	14.86
1834	NASDAQ	ATRA	Thu, Jan 27, 2022	16.00	16.35	14.17	14.26
1833	NASDAQ	ATRA	Wed, Jan 26, 2022	15.46	16.11	15.10	15.25
1832	NASDAQ	ATRA	Tue, Jan 25, 2022	14.48	15.42	14.35	15.10
1831	NASDAQ	ATRA	Mon, Jan 24, 2022	13.99	14.78	13.10	14.66
1830	NASDAQ	ATRA	Fri, Jan 21, 2022	14.37	14.71	13.98	13.99
1829	NASDAQ	ATRA	Thu, Jan 20, 2022	15.48	15.70	14.22	14.31
1828	NASDAQ	ATRA	Wed, Jan 19, 2022	15.17	16.02	14.91	15.22
1827	NASDAQ	ATRA	Tue, Jan 18, 2022	15.82	15.99	14.83	14.91
1826	NASDAQ	ATRA	Fri, Jan 14, 2022	14.40	16.23	14.38	16.07
1825	NASDAQ	ATRA	Thu, Jan 13, 2022	14.44	14.76	13.93	14.23
1824	NASDAQ	ATRA	Wed, Jan 12, 2022	15.46	15.57	14.33	14.39
1823	NASDAQ	ATRA	Tue, Jan 11, 2022	15.76	16.08	15.34	15.44
1822	NASDAQ	ATRA	Mon, Jan 10, 2022	15.29	16.02	15.08	15.88
1821	NASDAQ	ATRA	Fri, Jan 7, 2022	15.99	16.44	15.50	15.71
1820	NASDAQ	ATRA	Thu, Jan 6, 2022	15.54	16.15	15.38	15.98
1819	NASDAQ	ATRA	Wed, Jan 5, 2022	15.96	16.59	15.54	15.58
1818	NASDAQ	ATRA	Tue, Jan 4, 2022	16.76	16.91	16.02	16.27
1817	NASDAQ	ATRA	Mon, Jan 3, 2022	16.01	16.93	15.68	16.89
1816	NASDAQ	ATRA	Fri, Dec 31, 2021	16.30	16.55	15.68	15.76
1815	NASDAQ	ATRA	Thu, Dec 30, 2021	17.34	17.39	16.08	16.12
1814	NASDAQ	ATRA	Wed, Dec 29, 2021	17.47	17.47	16.89	17.04
1813	NASDAQ	ATRA	Tue, Dec 28, 2021	17.14	17.75	17.14	17.24
1812	NASDAQ	ATRA	Mon, Dec 27, 2021	17.21	17.23	16.91	17.13
1811	NASDAQ	ATRA	Thu, Dec 23, 2021	16.34	17.50	16.34	17.31
1810	NASDAQ	ATRA	Wed, Dec 22, 2021	15.62	16.41	15.28	16.35
1809	NASDAQ	ATRA	Tue, Dec 21, 2021	15.72	15.91	15.12	15.56
1808	NASDAQ	ATRA	Mon, Dec 20, 2021	15.15	15.73	14.69	15.69
1807	NASDAQ	ATRA	Fri, Dec 17, 2021	15.18	15.62	14.77	15.15
1806	NASDAQ	ATRA	Thu, Dec 16, 2021	16.18	16.47	15.16	15.27
1805	NASDAQ	ATRA	Wed, Dec 15, 2021	15.66	16.15	15.09	16.03
1804	NASDAQ	ATRA	Tue, Dec 14, 2021	15.40	16.05	15.19	15.71
1803	NASDAQ	ATRA	Mon, Dec 13, 2021	16.04	16.20	15.26	15.66
1802	NASDAQ	ATRA	Fri, Dec 10, 2021	16.55	16.93	15.74	15.98
1801	NASDAQ	ATRA	Thu, Dec 9, 2021	17.33	17.51	16.13	16.31
1800	NASDAQ	ATRA	Wed, Dec 8, 2021	17.99	18.03	17.41	17.52
1799	NASDAQ	ATRA	Tue, Dec 7, 2021	17.00	18.31	17.00	17.89
1798	NASDAQ	ATRA	Mon, Dec 6, 2021	17.00	17.43	16.36	16.98
1797	NASDAQ	ATRA	Fri, Dec 3, 2021	18.19	18.26	16.83	17.09
1796	NASDAQ	ATRA	Thu, Dec 2, 2021	17.03	18.12	17.03	18.01
1795	NASDAQ	ATRA	Wed, Dec 1, 2021	18.05	18.61	17.35	17.36
1794	NASDAQ	ATRA	Tue, Nov 30, 2021	17.65	17.98	17.23	17.89
1793	NASDAQ	ATRA	Mon, Nov 29, 2021	17.57	18.35	17.49	17.79
1792	NASDAQ	ATRA	Fri, Nov 26, 2021	17.81	18.07	17.03	17.57
1791	NASDAQ	ATRA	Wed, Nov 24, 2021	17.97	18.18	17.61	18.15
1790	NASDAQ	ATRA	Tue, Nov 23, 2021	18.13	18.20	17.12	18.07
1789	NASDAQ	ATRA	Mon, Nov 22, 2021	18.46	18.85	18.10	18.19
1788	NASDAQ	ATRA	Fri, Nov 19, 2021	17.67	18.50	17.50	18.30
1787	NASDAQ	ATRA	Thu, Nov 18, 2021	17.89	18.09	17.60	17.83
1786	NASDAQ	ATRA	Wed, Nov 17, 2021	17.30	17.92	17.30	17.80
1785	NASDAQ	ATRA	Tue, Nov 16, 2021	16.47	17.45	16.30	17.37
1784	NASDAQ	ATRA	Mon, Nov 15, 2021	17.64	18.00	16.95	17.07
1783	NASDAQ	ATRA	Fri, Nov 12, 2021	17.62	17.77	17.35	17.62
1782	NASDAQ	ATRA	Thu, Nov 11, 2021	17.53	17.80	17.37	17.54
1781	NASDAQ	ATRA	Wed, Nov 10, 2021	17.70	18.11	17.21	17.30
1780	NASDAQ	ATRA	Tue, Nov 9, 2021	17.71	18.04	17.38	17.93
1779	NASDAQ	ATRA	Mon, Nov 8, 2021	18.34	18.45	17.40	17.64
1778	NASDAQ	ATRA	Fri, Nov 5, 2021	19.46	19.46	18.09	18.17
1777	NASDAQ	ATRA	Thu, Nov 4, 2021	18.37	20.04	18.08	19.89
1776	NASDAQ	ATRA	Wed, Nov 3, 2021	17.39	18.84	17.18	18.75
1775	NASDAQ	ATRA	Tue, Nov 2, 2021	16.41	17.39	15.97	17.36
1774	NASDAQ	ATRA	Mon, Nov 1, 2021	15.60	16.58	15.28	16.51
1773	NASDAQ	ATRA	Fri, Oct 29, 2021	16.18	16.18	15.40	15.48
1772	NASDAQ	ATRA	Thu, Oct 28, 2021	15.01	15.65	14.88	15.64
1771	NASDAQ	ATRA	Wed, Oct 27, 2021	15.20	15.28	14.98	14.98
1770	NASDAQ	ATRA	Tue, Oct 26, 2021	15.30	15.36	14.96	15.20
1769	NASDAQ	ATRA	Mon, Oct 25, 2021	16.07	16.07	15.14	15.18
1768	NASDAQ	ATRA	Fri, Oct 22, 2021	15.67	16.06	15.55	16.03
1767	NASDAQ	ATRA	Thu, Oct 21, 2021	15.71	15.97	15.45	15.81
1766	NASDAQ	ATRA	Wed, Oct 20, 2021	15.02	15.83	15.02	15.71
1765	NASDAQ	ATRA	Tue, Oct 19, 2021	14.67	15.17	14.41	15.13
1764	NASDAQ	ATRA	Mon, Oct 18, 2021	15.07	15.28	14.55	14.70
1763	NASDAQ	ATRA	Fri, Oct 15, 2021	15.95	15.97	15.10	15.12
1762	NASDAQ	ATRA	Thu, Oct 14, 2021	15.87	15.98	15.01	15.76
1761	NASDAQ	ATRA	Wed, Oct 13, 2021	17.90	17.97	15.34	15.66
1760	NASDAQ	ATRA	Tue, Oct 12, 2021	16.97	18.01	16.81	17.98
1759	NASDAQ	ATRA	Mon, Oct 11, 2021	17.15	17.22	16.83	16.93
1758	NASDAQ	ATRA	Fri, Oct 8, 2021	17.57	17.57	16.91	17.05
1757	NASDAQ	ATRA	Thu, Oct 7, 2021	17.46	17.77	17.30	17.62
1756	NASDAQ	ATRA	Wed, Oct 6, 2021	17.05	17.68	17.05	17.41
1755	NASDAQ	ATRA	Tue, Oct 5, 2021	17.66	17.84	17.07	17.48
1754	NASDAQ	ATRA	Mon, Oct 4, 2021	17.47	17.93	17.30	17.45
1753	NASDAQ	ATRA	Fri, Oct 1, 2021	17.73	18.00	17.04	17.50
1752	NASDAQ	ATRA	Thu, Sep 30, 2021	17.62	18.35	17.39	17.90
1751	NASDAQ	ATRA	Wed, Sep 29, 2021	17.75	17.89	17.25	17.55
1750	NASDAQ	ATRA	Tue, Sep 28, 2021	17.40	18.16	17.28	17.39
1749	NASDAQ	ATRA	Mon, Sep 27, 2021	17.17	17.70	17.05	17.47
1748	NASDAQ	ATRA	Fri, Sep 24, 2021	17.05	17.24	16.91	17.00
1747	NASDAQ	ATRA	Thu, Sep 23, 2021	16.90	17.39	16.79	17.30
1746	NASDAQ	ATRA	Wed, Sep 22, 2021	16.44	17.07	16.37	16.79
1745	NASDAQ	ATRA	Tue, Sep 21, 2021	16.27	16.68	16.09	16.38
1744	NASDAQ	ATRA	Mon, Sep 20, 2021	15.47	16.40	15.47	16.24
1743	NASDAQ	ATRA	Fri, Sep 17, 2021	16.01	16.25	15.43	16.08
1742	NASDAQ	ATRA	Thu, Sep 16, 2021	15.88	16.08	15.47	15.87
1741	NASDAQ	ATRA	Wed, Sep 15, 2021	15.68	16.16	15.51	15.90
1740	NASDAQ	ATRA	Tue, Sep 14, 2021	16.03	16.05	15.50	15.66
1739	NASDAQ	ATRA	Mon, Sep 13, 2021	15.77	16.30	15.27	16.07
1738	NASDAQ	ATRA	Fri, Sep 10, 2021	15.09	15.81	14.75	15.68
1737	NASDAQ	ATRA	Thu, Sep 9, 2021	14.81	15.33	14.58	15.07
1736	NASDAQ	ATRA	Wed, Sep 8, 2021	15.30	15.30	14.73	14.90
1735	NASDAQ	ATRA	Tue, Sep 7, 2021	15.48	15.76	15.08	15.31
1734	NASDAQ	ATRA	Fri, Sep 3, 2021	16.00	16.13	15.54	15.56
1733	NASDAQ	ATRA	Thu, Sep 2, 2021	15.80	16.26	15.71	16.12
1732	NASDAQ	ATRA	Wed, Sep 1, 2021	14.94	15.84	14.73	15.69
1731	NASDAQ	ATRA	Tue, Aug 31, 2021	14.74	15.14	14.65	14.98
1730	NASDAQ	ATRA	Mon, Aug 30, 2021	14.76	15.18	14.64	14.73
1729	NASDAQ	ATRA	Fri, Aug 27, 2021	13.85	14.79	13.73	14.70
1728	NASDAQ	ATRA	Thu, Aug 26, 2021	13.73	14.13	13.61	13.87
1727	NASDAQ	ATRA	Wed, Aug 25, 2021	13.62	14.08	13.45	13.83
1726	NASDAQ	ATRA	Tue, Aug 24, 2021	13.52	13.57	13.08	13.56
1725	NASDAQ	ATRA	Mon, Aug 23, 2021	12.70	14.10	12.61	13.55
1724	NASDAQ	ATRA	Fri, Aug 20, 2021	11.88	12.89	11.81	12.63
1723	NASDAQ	ATRA	Thu, Aug 19, 2021	12.48	12.67	11.95	11.99
1722	NASDAQ	ATRA	Wed, Aug 18, 2021	12.68	12.91	12.36	12.51
1721	NASDAQ	ATRA	Tue, Aug 17, 2021	12.18	12.74	12.18	12.69
1720	NASDAQ	ATRA	Mon, Aug 16, 2021	12.43	12.63	12.21	12.41
1719	NASDAQ	ATRA	Fri, Aug 13, 2021	12.52	12.63	12.36	12.45
1718	NASDAQ	ATRA	Thu, Aug 12, 2021	12.55	12.70	12.40	12.56
1717	NASDAQ	ATRA	Wed, Aug 11, 2021	12.67	12.71	12.30	12.55
1716	NASDAQ	ATRA	Tue, Aug 10, 2021	13.15	13.66	12.61	12.74
1715	NASDAQ	ATRA	Mon, Aug 9, 2021	12.61	12.80	12.38	12.49
1714	NASDAQ	ATRA	Fri, Aug 6, 2021	12.85	12.93	12.45	12.64
1713	NASDAQ	ATRA	Thu, Aug 5, 2021	12.37	12.92	12.23	12.87
1712	NASDAQ	ATRA	Wed, Aug 4, 2021	12.56	12.84	12.36	12.40
1711	NASDAQ	ATRA	Tue, Aug 3, 2021	13.03	13.03	12.45	12.59
1710	NASDAQ	ATRA	Mon, Aug 2, 2021	12.83	13.12	12.71	12.92
1709	NASDAQ	ATRA	Fri, Jul 30, 2021	12.90	13.05	12.69	12.75
1708	NASDAQ	ATRA	Thu, Jul 29, 2021	13.23	13.31	12.95	13.05
1707	NASDAQ	ATRA	Wed, Jul 28, 2021	12.68	13.26	12.68	13.19
1706	NASDAQ	ATRA	Tue, Jul 27, 2021	12.54	12.81	12.32	12.59
1705	NASDAQ	ATRA	Mon, Jul 26, 2021	12.78	12.94	12.56	12.65
1704	NASDAQ	ATRA	Fri, Jul 23, 2021	13.18	13.18	12.72	12.77
1703	NASDAQ	ATRA	Thu, Jul 22, 2021	13.33	13.41	12.99	13.04
1702	NASDAQ	ATRA	Wed, Jul 21, 2021	13.25	13.59	13.11	13.42
1701	NASDAQ	ATRA	Tue, Jul 20, 2021	12.92	13.20	12.75	13.16
1700	NASDAQ	ATRA	Mon, Jul 19, 2021	13.00	13.22	12.72	12.96
1699	NASDAQ	ATRA	Fri, Jul 16, 2021	13.81	13.87	13.20	13.26
1698	NASDAQ	ATRA	Thu, Jul 15, 2021	13.49	13.76	13.28	13.68
1697	NASDAQ	ATRA	Wed, Jul 14, 2021	13.87	13.93	13.41	13.54
1696	NASDAQ	ATRA	Tue, Jul 13, 2021	13.83	13.93	13.41	13.77
1695	NASDAQ	ATRA	Mon, Jul 12, 2021	14.02	14.17	13.81	13.98
1694	NASDAQ	ATRA	Fri, Jul 9, 2021	14.57	14.59	14.11	14.15
1693	NASDAQ	ATRA	Thu, Jul 8, 2021	14.30	14.78	14.30	14.51
1692	NASDAQ	ATRA	Wed, Jul 7, 2021	14.55	14.74	14.19	14.59
1691	NASDAQ	ATRA	Tue, Jul 6, 2021	15.89	15.95	14.56	14.56
1690	NASDAQ	ATRA	Fri, Jul 2, 2021	16.10	16.10	15.72	15.92
1689	NASDAQ	ATRA	Thu, Jul 1, 2021	15.67	16.06	15.42	16.05
1688	NASDAQ	ATRA	Wed, Jun 30, 2021	15.48	15.80	15.26	15.55
1687	NASDAQ	ATRA	Tue, Jun 29, 2021	16.15	16.18	15.50	15.54
1686	NASDAQ	ATRA	Mon, Jun 28, 2021	16.40	16.85	16.04	16.04
1685	NASDAQ	ATRA	Fri, Jun 25, 2021	16.32	16.51	15.80	16.35
1684	NASDAQ	ATRA	Thu, Jun 24, 2021	15.54	16.61	15.54	16.58
1683	NASDAQ	ATRA	Wed, Jun 23, 2021	15.65	15.93	15.46	15.50
1682	NASDAQ	ATRA	Tue, Jun 22, 2021	15.56	15.66	15.04	15.61
1681	NASDAQ	ATRA	Mon, Jun 21, 2021	15.03	15.75	14.88	15.65
1680	NASDAQ	ATRA	Fri, Jun 18, 2021	15.13	15.30	14.84	15.01
1679	NASDAQ	ATRA	Thu, Jun 17, 2021	15.19	15.45	15.01	15.36
1678	NASDAQ	ATRA	Wed, Jun 16, 2021	14.68	15.44	14.57	15.36
1677	NASDAQ	ATRA	Tue, Jun 15, 2021	14.67	14.94	13.99	14.00
1676	NASDAQ	ATRA	Mon, Jun 14, 2021	14.58	14.92	14.42	14.66
1675	NASDAQ	ATRA	Fri, Jun 11, 2021	14.50	14.58	14.26	14.40
1674	NASDAQ	ATRA	Thu, Jun 10, 2021	14.22	14.50	14.16	14.38
1673	NASDAQ	ATRA	Wed, Jun 9, 2021	13.94	14.45	13.92	14.26
1672	NASDAQ	ATRA	Tue, Jun 8, 2021	14.06	14.29	13.42	13.80
1671	NASDAQ	ATRA	Mon, Jun 7, 2021	13.20	14.22	13.11	14.06
1670	NASDAQ	ATRA	Fri, Jun 4, 2021	13.33	13.56	13.15	13.18
1669	NASDAQ	ATRA	Thu, Jun 3, 2021	13.83	14.00	13.29	13.33
1668	NASDAQ	ATRA	Wed, Jun 2, 2021	14.10	14.23	13.65	13.83
1667	NASDAQ	ATRA	Tue, Jun 1, 2021	13.51	14.04	13.44	13.97
1666	NASDAQ	ATRA	Fri, May 28, 2021	13.78	14.12	13.54	13.56
1665	NASDAQ	ATRA	Thu, May 27, 2021	13.82	13.83	13.54	13.68
1664	NASDAQ	ATRA	Wed, May 26, 2021	13.33	13.70	13.27	13.62
1663	NASDAQ	ATRA	Tue, May 25, 2021	13.70	13.94	13.22	13.23
1662	NASDAQ	ATRA	Mon, May 24, 2021	13.84	14.05	13.31	13.59
1661	NASDAQ	ATRA	Fri, May 21, 2021	14.48	14.62	13.75	13.77
1660	NASDAQ	ATRA	Thu, May 20, 2021	14.10	14.55	14.04	14.35
1659	NASDAQ	ATRA	Wed, May 19, 2021	14.56	14.79	13.93	14.04
1658	NASDAQ	ATRA	Tue, May 18, 2021	14.31	15.04	14.28	14.53
1657	NASDAQ	ATRA	Mon, May 17, 2021	14.88	15.00	14.24	14.37
1656	NASDAQ	ATRA	Fri, May 14, 2021	14.66	15.36	14.17	14.99
1655	NASDAQ	ATRA	Thu, May 13, 2021	14.81	15.50	14.12	14.72
1654	NASDAQ	ATRA	Wed, May 12, 2021	13.71	14.47	13.71	13.83
1653	NASDAQ	ATRA	Tue, May 11, 2021	12.93	14.37	12.80	13.91
1652	NASDAQ	ATRA	Mon, May 10, 2021	13.44	13.57	12.92	13.24
1651	NASDAQ	ATRA	Fri, May 7, 2021	13.01	13.62	13.00	13.59
1650	NASDAQ	ATRA	Thu, May 6, 2021	13.77	13.77	12.67	12.89
1649	NASDAQ	ATRA	Wed, May 5, 2021	13.83	14.17	13.42	13.50
1648	NASDAQ	ATRA	Tue, May 4, 2021	13.86	14.01	13.26	13.65
1647	NASDAQ	ATRA	Mon, May 3, 2021	14.11	14.36	14.01	14.05
1646	NASDAQ	ATRA	Fri, Apr 30, 2021	14.32	14.57	14.01	14.06
1645	NASDAQ	ATRA	Thu, Apr 29, 2021	14.41	14.91	14.15	14.53
1644	NASDAQ	ATRA	Wed, Apr 28, 2021	14.53	14.66	14.20	14.34
1643	NASDAQ	ATRA	Tue, Apr 27, 2021	14.59	14.95	14.36	14.65
1642	NASDAQ	ATRA	Mon, Apr 26, 2021	14.15	14.63	14.15	14.49
1641	NASDAQ	ATRA	Fri, Apr 23, 2021	14.33	14.62	14.10	14.14
1640	NASDAQ	ATRA	Thu, Apr 22, 2021	13.59	14.50	13.50	14.31
1639	NASDAQ	ATRA	Wed, Apr 21, 2021	13.19	13.72	12.84	13.64
1638	NASDAQ	ATRA	Tue, Apr 20, 2021	13.22	13.53	12.97	13.29
1637	NASDAQ	ATRA	Mon, Apr 19, 2021	13.20	13.49	13.05	13.30
1636	NASDAQ	ATRA	Fri, Apr 16, 2021	13.93	13.93	13.14	13.28
1635	NASDAQ	ATRA	Thu, Apr 15, 2021	13.92	14.19	13.59	13.94
1634	NASDAQ	ATRA	Wed, Apr 14, 2021	13.93	14.36	13.80	13.85
1633	NASDAQ	ATRA	Tue, Apr 13, 2021	13.74	13.91	13.50	13.90
1632	NASDAQ	ATRA	Mon, Apr 12, 2021	13.75	14.00	13.29	13.70
1631	NASDAQ	ATRA	Fri, Apr 9, 2021	14.28	14.28	13.48	13.77
1630	NASDAQ	ATRA	Thu, Apr 8, 2021	14.32	14.55	14.02	14.19
1629	NASDAQ	ATRA	Wed, Apr 7, 2021	14.14	14.57	13.98	14.20
1628	NASDAQ	ATRA	Tue, Apr 6, 2021	14.74	14.74	13.98	14.15
1627	NASDAQ	ATRA	Mon, Apr 5, 2021	15.01	15.21	14.46	14.66
1626	NASDAQ	ATRA	Thu, Apr 1, 2021	14.54	15.13	14.32	14.91
1625	NASDAQ	ATRA	Wed, Mar 31, 2021	14.15	14.63	14.00	14.36
1624	NASDAQ	ATRA	Tue, Mar 30, 2021	13.89	14.45	13.47	14.22
1623	NASDAQ	ATRA	Mon, Mar 29, 2021	14.58	14.79	13.94	14.00
1622	NASDAQ	ATRA	Fri, Mar 26, 2021	14.82	14.93	13.98	14.80
1621	NASDAQ	ATRA	Thu, Mar 25, 2021	13.93	14.85	13.83	14.77
1620	NASDAQ	ATRA	Wed, Mar 24, 2021	14.88	15.38	14.15	14.18
1619	NASDAQ	ATRA	Tue, Mar 23, 2021	15.25	15.30	14.69	14.80
1618	NASDAQ	ATRA	Mon, Mar 22, 2021	15.25	15.71	14.95	15.41
1617	NASDAQ	ATRA	Fri, Mar 19, 2021	15.27	15.47	14.72	15.04
1616	NASDAQ	ATRA	Thu, Mar 18, 2021	16.15	16.41	14.94	15.10
1615	NASDAQ	ATRA	Wed, Mar 17, 2021	16.34	16.52	15.98	16.39
1614	NASDAQ	ATRA	Tue, Mar 16, 2021	17.26	17.39	16.16	16.50
1613	NASDAQ	ATRA	Mon, Mar 15, 2021	18.00	18.00	16.86	17.30
1612	NASDAQ	ATRA	Fri, Mar 12, 2021	16.85	17.30	16.57	16.90
1611	NASDAQ	ATRA	Thu, Mar 11, 2021	16.95	17.11	16.75	17.00
1610	NASDAQ	ATRA	Wed, Mar 10, 2021	16.80	17.20	16.40	16.70
1609	NASDAQ	ATRA	Tue, Mar 9, 2021	16.38	16.90	16.07	16.54
1608	NASDAQ	ATRA	Mon, Mar 8, 2021	16.11	16.57	15.91	16.18
1607	NASDAQ	ATRA	Fri, Mar 5, 2021	15.79	16.25	15.20	16.07
1606	NASDAQ	ATRA	Thu, Mar 4, 2021	16.05	16.38	15.21	15.89
1605	NASDAQ	ATRA	Wed, Mar 3, 2021	16.95	17.19	15.71	15.95
1604	NASDAQ	ATRA	Tue, Mar 2, 2021	16.55	18.10	16.12	16.94
1603	NASDAQ	ATRA	Mon, Mar 1, 2021	17.14	17.50	16.72	17.11
1602	NASDAQ	ATRA	Fri, Feb 26, 2021	16.72	17.15	16.29	16.78
1601	NASDAQ	ATRA	Thu, Feb 25, 2021	17.29	17.62	16.39	16.61
1600	NASDAQ	ATRA	Wed, Feb 24, 2021	16.82	17.48	16.56	17.35
1599	NASDAQ	ATRA	Tue, Feb 23, 2021	16.89	17.32	16.21	16.80
1598	NASDAQ	ATRA	Mon, Feb 22, 2021	17.76	18.19	17.14	17.22
1597	NASDAQ	ATRA	Fri, Feb 19, 2021	17.79	18.71	17.77	17.88
1596	NASDAQ	ATRA	Thu, Feb 18, 2021	18.18	18.27	17.71	17.79
1595	NASDAQ	ATRA	Wed, Feb 17, 2021	18.39	18.64	17.54	18.31
1594	NASDAQ	ATRA	Tue, Feb 16, 2021	19.34	19.34	18.38	18.64
1593	NASDAQ	ATRA	Fri, Feb 12, 2021	19.15	19.40	18.38	18.59
1592	NASDAQ	ATRA	Thu, Feb 11, 2021	19.43	19.80	18.71	19.22
1591	NASDAQ	ATRA	Wed, Feb 10, 2021	20.60	20.91	19.11	19.36
1590	NASDAQ	ATRA	Tue, Feb 9, 2021	20.75	21.24	20.21	20.37
1589	NASDAQ	ATRA	Mon, Feb 8, 2021	20.39	21.85	20.16	20.72
1588	NASDAQ	ATRA	Fri, Feb 5, 2021	19.47	20.52	19.34	20.32
1587	NASDAQ	ATRA	Thu, Feb 4, 2021	19.11	19.55	18.80	19.37
1586	NASDAQ	ATRA	Wed, Feb 3, 2021	19.41	19.82	18.90	19.08
1585	NASDAQ	ATRA	Tue, Feb 2, 2021	19.01	19.90	19.01	19.52
1584	NASDAQ	ATRA	Mon, Feb 1, 2021	19.01	19.20	18.15	18.87
1583	NASDAQ	ATRA	Fri, Jan 29, 2021	19.57	19.98	18.42	18.46
1582	NASDAQ	ATRA	Thu, Jan 28, 2021	19.00	19.63	18.78	19.00
1581	NASDAQ	ATRA	Wed, Jan 27, 2021	19.36	20.66	18.48	18.78
1580	NASDAQ	ATRA	Tue, Jan 26, 2021	19.48	20.30	19.42	19.56
1579	NASDAQ	ATRA	Mon, Jan 25, 2021	18.61	19.36	18.37	19.32
1578	NASDAQ	ATRA	Fri, Jan 22, 2021	18.10	18.72	17.57	18.44
1577	NASDAQ	ATRA	Thu, Jan 21, 2021	18.50	18.63	17.40	18.33
1576	NASDAQ	ATRA	Wed, Jan 20, 2021	19.02	19.26	18.22	18.27
1575	NASDAQ	ATRA	Tue, Jan 19, 2021	19.41	19.79	18.69	19.02
1574	NASDAQ	ATRA	Fri, Jan 15, 2021	18.83	19.19	18.34	18.61
1573	NASDAQ	ATRA	Thu, Jan 14, 2021	19.12	19.53	18.71	18.85
1572	NASDAQ	ATRA	Wed, Jan 13, 2021	19.72	19.90	18.83	18.97
1571	NASDAQ	ATRA	Tue, Jan 12, 2021	20.06	20.39	19.57	19.82
1570	NASDAQ	ATRA	Mon, Jan 11, 2021	20.29	20.83	19.85	19.90
1569	NASDAQ	ATRA	Fri, Jan 8, 2021	20.40	20.89	19.96	20.41
1568	NASDAQ	ATRA	Thu, Jan 7, 2021	19.08	20.29	19.02	20.09
1567	NASDAQ	ATRA	Wed, Jan 6, 2021	19.38	19.67	18.57	18.86
1566	NASDAQ	ATRA	Tue, Jan 5, 2021	19.60	20.02	19.10	19.26
1565	NASDAQ	ATRA	Mon, Jan 4, 2021	19.64	20.62	19.16	19.64
1564	NASDAQ	ATRA	Thu, Dec 31, 2020	20.44	20.49	19.39	19.63
1563	NASDAQ	ATRA	Wed, Dec 30, 2020	20.44	20.98	20.20	20.52
1562	NASDAQ	ATRA	Tue, Dec 29, 2020	21.19	21.32	20.13	20.41
1561	NASDAQ	ATRA	Mon, Dec 28, 2020	22.12	22.30	21.03	21.16
1560	NASDAQ	ATRA	Thu, Dec 24, 2020	22.75	23.09	22.14	22.18
1559	NASDAQ	ATRA	Wed, Dec 23, 2020	22.49	22.80	22.10	22.46
1558	NASDAQ	ATRA	Tue, Dec 22, 2020	22.72	23.03	22.28	22.54
1557	NASDAQ	ATRA	Mon, Dec 21, 2020	21.22	22.81	21.06	22.50
1556	NASDAQ	ATRA	Fri, Dec 18, 2020	21.72	22.72	21.45	21.65
1555	NASDAQ	ATRA	Thu, Dec 17, 2020	22.41	22.44	21.63	21.99
1554	NASDAQ	ATRA	Wed, Dec 16, 2020	23.18	23.49	22.19	22.40
1553	NASDAQ	ATRA	Tue, Dec 15, 2020	23.87	23.87	22.32	23.12
1552	NASDAQ	ATRA	Mon, Dec 14, 2020	24.21	24.94	23.06	23.48
1551	NASDAQ	ATRA	Fri, Dec 11, 2020	24.00	24.40	23.98	24.12
1550	NASDAQ	ATRA	Thu, Dec 10, 2020	23.07	24.14	23.00	24.02
1549	NASDAQ	ATRA	Wed, Dec 9, 2020	23.45	23.75	22.66	23.09
1548	NASDAQ	ATRA	Tue, Dec 8, 2020	25.28	26.10	24.69	25.82
1547	NASDAQ	ATRA	Mon, Dec 7, 2020	27.05	28.20	25.89	26.23
1546	NASDAQ	ATRA	Fri, Dec 4, 2020	23.89	24.82	23.44	24.59
1545	NASDAQ	ATRA	Thu, Dec 3, 2020	23.70	24.20	23.48	23.81
1544	NASDAQ	ATRA	Wed, Dec 2, 2020	23.35	23.89	22.60	23.70
1543	NASDAQ	ATRA	Tue, Dec 1, 2020	23.42	24.05	23.05	23.40
1542	NASDAQ	ATRA	Mon, Nov 30, 2020	23.33	23.52	22.75	23.19
1541	NASDAQ	ATRA	Fri, Nov 27, 2020	23.05	23.69	22.97	23.27
1540	NASDAQ	ATRA	Wed, Nov 25, 2020	23.22	23.29	22.61	22.99
1539	NASDAQ	ATRA	Tue, Nov 24, 2020	24.00	24.00	23.01	23.18
1538	NASDAQ	ATRA	Mon, Nov 23, 2020	23.62	24.00	22.55	23.56
1537	NASDAQ	ATRA	Fri, Nov 20, 2020	22.18	23.50	21.80	22.98
1536	NASDAQ	ATRA	Thu, Nov 19, 2020	20.79	22.55	20.78	22.25
1535	NASDAQ	ATRA	Wed, Nov 18, 2020	20.41	21.19	20.13	20.84
1534	NASDAQ	ATRA	Tue, Nov 17, 2020	19.30	20.50	18.98	20.40
1533	NASDAQ	ATRA	Mon, Nov 16, 2020	18.31	19.55	18.28	19.53
1532	NASDAQ	ATRA	Fri, Nov 13, 2020	18.64	19.29	17.37	18.05
1531	NASDAQ	ATRA	Thu, Nov 12, 2020	15.81	18.38	15.77	18.12
1530	NASDAQ	ATRA	Wed, Nov 11, 2020	15.48	16.39	15.00	15.74
1529	NASDAQ	ATRA	Tue, Nov 10, 2020	14.95	15.78	14.48	15.58
1528	NASDAQ	ATRA	Mon, Nov 9, 2020	14.28	14.88	14.02	14.40
1527	NASDAQ	ATRA	Fri, Nov 6, 2020	13.86	14.10	13.39	13.45
1526	NASDAQ	ATRA	Thu, Nov 5, 2020	14.41	14.48	13.32	13.88
1525	NASDAQ	ATRA	Wed, Nov 4, 2020	13.25	14.36	12.92	14.30
1524	NASDAQ	ATRA	Tue, Nov 3, 2020	12.71	13.30	12.55	13.14
1523	NASDAQ	ATRA	Mon, Nov 2, 2020	13.27	13.27	11.97	12.67
1522	NASDAQ	ATRA	Fri, Oct 30, 2020	13.48	13.73	12.66	12.91
1521	NASDAQ	ATRA	Thu, Oct 29, 2020	13.45	13.67	13.15	13.50
1520	NASDAQ	ATRA	Wed, Oct 28, 2020	13.78	13.90	13.30	13.50
1519	NASDAQ	ATRA	Tue, Oct 27, 2020	14.43	14.51	13.99	14.13
1518	NASDAQ	ATRA	Mon, Oct 26, 2020	14.44	14.67	13.87	14.34
1517	NASDAQ	ATRA	Fri, Oct 23, 2020	14.75	14.80	14.10	14.61
1516	NASDAQ	ATRA	Thu, Oct 22, 2020	13.64	14.84	13.64	14.65
1515	NASDAQ	ATRA	Wed, Oct 21, 2020	13.74	14.24	13.43	13.70
1514	NASDAQ	ATRA	Tue, Oct 20, 2020	13.92	13.98	13.55	13.72
1513	NASDAQ	ATRA	Mon, Oct 19, 2020	14.12	14.37	13.76	13.77
1512	NASDAQ	ATRA	Fri, Oct 16, 2020	14.52	14.91	12.90	14.01
1511	NASDAQ	ATRA	Thu, Oct 15, 2020	13.50	14.67	13.44	14.58
1510	NASDAQ	ATRA	Wed, Oct 14, 2020	14.07	14.65	13.50	13.87
1509	NASDAQ	ATRA	Tue, Oct 13, 2020	14.50	14.79	13.71	14.12
1508	NASDAQ	ATRA	Mon, Oct 12, 2020	14.47	14.75	14.24	14.60
1507	NASDAQ	ATRA	Fri, Oct 9, 2020	14.49	14.70	14.25	14.47
1506	NASDAQ	ATRA	Thu, Oct 8, 2020	14.67	14.85	14.28	14.45
1505	NASDAQ	ATRA	Wed, Oct 7, 2020	14.07	14.76	14.01	14.50
1504	NASDAQ	ATRA	Tue, Oct 6, 2020	13.79	14.48	13.72	13.96
1503	NASDAQ	ATRA	Mon, Oct 5, 2020	13.30	13.84	13.24	13.68
1502	NASDAQ	ATRA	Fri, Oct 2, 2020	12.95	13.37	12.66	13.07
1501	NASDAQ	ATRA	Thu, Oct 1, 2020	13.06	13.69	12.96	13.23
1500	NASDAQ	ATRA	Wed, Sep 30, 2020	13.12	13.38	11.97	12.96
1499	NASDAQ	ATRA	Tue, Sep 29, 2020	12.85	13.26	12.82	13.08
1498	NASDAQ	ATRA	Mon, Sep 28, 2020	12.98	13.18	12.60	12.94
1497	NASDAQ	ATRA	Fri, Sep 25, 2020	12.40	13.27	12.40	12.97
1496	NASDAQ	ATRA	Thu, Sep 24, 2020	13.29	13.30	12.43	12.55
1495	NASDAQ	ATRA	Wed, Sep 23, 2020	14.17	14.33	13.36	13.42
1494	NASDAQ	ATRA	Tue, Sep 22, 2020	14.83	15.54	13.73	14.12
1493	NASDAQ	ATRA	Mon, Sep 21, 2020	16.02	16.05	14.66	14.83
1492	NASDAQ	ATRA	Fri, Sep 18, 2020	16.00	16.08	15.50	15.87
1491	NASDAQ	ATRA	Thu, Sep 17, 2020	15.45	15.96	15.31	15.80
1490	NASDAQ	ATRA	Wed, Sep 16, 2020	15.92	16.20	15.49	15.69
1489	NASDAQ	ATRA	Tue, Sep 15, 2020	15.77	16.00	14.98	15.64
1488	NASDAQ	ATRA	Mon, Sep 14, 2020	15.37	15.89	14.76	15.03
1487	NASDAQ	ATRA	Fri, Sep 11, 2020	14.74	16.32	14.52	14.96
1486	NASDAQ	ATRA	Thu, Sep 10, 2020	14.89	15.43	14.20	14.24
1485	NASDAQ	ATRA	Wed, Sep 9, 2020	13.73	14.92	13.68	14.83
1484	NASDAQ	ATRA	Tue, Sep 8, 2020	12.75	13.92	12.59	13.46
1483	NASDAQ	ATRA	Fri, Sep 4, 2020	12.84	13.09	12.00	12.91
1482	NASDAQ	ATRA	Thu, Sep 3, 2020	12.83	13.29	12.39	12.79
1481	NASDAQ	ATRA	Wed, Sep 2, 2020	12.95	13.32	12.34	12.97
1480	NASDAQ	ATRA	Tue, Sep 1, 2020	13.31	13.50	12.66	12.95
1479	NASDAQ	ATRA	Mon, Aug 31, 2020	13.67	14.15	13.47	13.48
1478	NASDAQ	ATRA	Fri, Aug 28, 2020	13.20	13.59	13.04	13.57
1477	NASDAQ	ATRA	Thu, Aug 27, 2020	13.24	13.39	12.99	13.25
1476	NASDAQ	ATRA	Wed, Aug 26, 2020	13.61	13.74	13.19	13.24
1475	NASDAQ	ATRA	Tue, Aug 25, 2020	12.94	13.85	12.71	13.64
1474	NASDAQ	ATRA	Mon, Aug 24, 2020	12.75	12.98	12.62	12.96
1473	NASDAQ	ATRA	Fri, Aug 21, 2020	13.21	13.25	12.60	12.67
1472	NASDAQ	ATRA	Thu, Aug 20, 2020	12.69	13.66	12.53	13.24
1471	NASDAQ	ATRA	Wed, Aug 19, 2020	12.05	12.93	11.88	12.82
1470	NASDAQ	ATRA	Tue, Aug 18, 2020	12.44	12.51	11.33	11.92
1469	NASDAQ	ATRA	Mon, Aug 17, 2020	12.14	12.75	11.94	12.47
1468	NASDAQ	ATRA	Fri, Aug 14, 2020	12.66	12.71	11.92	12.17
1467	NASDAQ	ATRA	Thu, Aug 13, 2020	12.27	12.94	12.27	12.80
1466	NASDAQ	ATRA	Wed, Aug 12, 2020	12.40	12.48	11.95	12.30
1465	NASDAQ	ATRA	Tue, Aug 11, 2020	12.80	12.90	12.21	12.31
1464	NASDAQ	ATRA	Mon, Aug 10, 2020	12.95	13.09	12.54	12.75
1463	NASDAQ	ATRA	Fri, Aug 7, 2020	12.50	13.04	12.35	12.73
1462	NASDAQ	ATRA	Thu, Aug 6, 2020	13.20	13.50	12.20	12.55
1461	NASDAQ	ATRA	Wed, Aug 5, 2020	12.66	13.07	12.10	12.71
1460	NASDAQ	ATRA	Tue, Aug 4, 2020	13.37	13.45	11.62	12.32
1459	NASDAQ	ATRA	Mon, Aug 3, 2020	12.54	13.56	12.46	13.51
1458	NASDAQ	ATRA	Fri, Jul 31, 2020	13.01	13.11	11.62	12.39
1457	NASDAQ	ATRA	Thu, Jul 30, 2020	12.56	13.29	12.44	13.03
1456	NASDAQ	ATRA	Wed, Jul 29, 2020	13.01	13.20	12.57	12.74
1455	NASDAQ	ATRA	Tue, Jul 28, 2020	13.77	13.91	12.83	12.91
1454	NASDAQ	ATRA	Mon, Jul 27, 2020	13.86	14.13	13.56	13.90
1453	NASDAQ	ATRA	Fri, Jul 24, 2020	13.92	13.99	13.37	13.81
1452	NASDAQ	ATRA	Thu, Jul 23, 2020	13.85	14.39	13.65	13.97
1451	NASDAQ	ATRA	Wed, Jul 22, 2020	13.66	14.03	13.65	13.85
1450	NASDAQ	ATRA	Tue, Jul 21, 2020	14.10	14.18	13.65	13.80
1449	NASDAQ	ATRA	Mon, Jul 20, 2020	13.70	13.99	13.53	13.91
1448	NASDAQ	ATRA	Fri, Jul 17, 2020	13.40	14.13	13.40	13.67
1447	NASDAQ	ATRA	Thu, Jul 16, 2020	13.70	13.99	13.18	13.40
1446	NASDAQ	ATRA	Wed, Jul 15, 2020	14.04	14.10	13.27	13.80
1445	NASDAQ	ATRA	Tue, Jul 14, 2020	13.60	13.81	13.33	13.64
1444	NASDAQ	ATRA	Mon, Jul 13, 2020	14.87	14.99	13.50	13.53
1443	NASDAQ	ATRA	Fri, Jul 10, 2020	15.38	15.66	14.47	14.69
1442	NASDAQ	ATRA	Thu, Jul 9, 2020	15.57	15.58	14.85	15.31
1441	NASDAQ	ATRA	Wed, Jul 8, 2020	15.50	15.58	15.06	15.50
1440	NASDAQ	ATRA	Tue, Jul 7, 2020	15.24	15.62	14.65	15.35
1439	NASDAQ	ATRA	Mon, Jul 6, 2020	15.04	16.00	14.76	15.46
1438	NASDAQ	ATRA	Thu, Jul 2, 2020	15.30	15.35	14.55	14.68
1437	NASDAQ	ATRA	Wed, Jul 1, 2020	14.48	15.37	14.35	15.03
1436	NASDAQ	ATRA	Tue, Jun 30, 2020	14.02	14.67	13.83	14.57
1435	NASDAQ	ATRA	Mon, Jun 29, 2020	13.37	14.16	13.29	13.84
1434	NASDAQ	ATRA	Fri, Jun 26, 2020	13.77	13.77	13.01	13.52
1433	NASDAQ	ATRA	Thu, Jun 25, 2020	13.00	14.10	12.85	14.02
1432	NASDAQ	ATRA	Wed, Jun 24, 2020	12.12	13.17	12.10	12.92
1431	NASDAQ	ATRA	Tue, Jun 23, 2020	12.00	12.54	11.83	12.25
1430	NASDAQ	ATRA	Mon, Jun 22, 2020	10.75	12.24	10.64	11.84
1429	NASDAQ	ATRA	Fri, Jun 19, 2020	10.89	11.21	10.62	10.62
1428	NASDAQ	ATRA	Thu, Jun 18, 2020	10.40	10.93	10.38	10.80
1427	NASDAQ	ATRA	Wed, Jun 17, 2020	10.56	11.35	10.45	10.54
1426	NASDAQ	ATRA	Tue, Jun 16, 2020	10.71	10.85	9.90	10.54
1425	NASDAQ	ATRA	Mon, Jun 15, 2020	9.40	10.45	9.24	10.45
1424	NASDAQ	ATRA	Fri, Jun 12, 2020	9.33	9.40	8.90	9.38
1423	NASDAQ	ATRA	Thu, Jun 11, 2020	9.50	9.86	8.93	8.94
1422	NASDAQ	ATRA	Wed, Jun 10, 2020	10.43	10.54	9.87	9.91
1421	NASDAQ	ATRA	Tue, Jun 9, 2020	10.18	10.88	10.10	10.40
1420	NASDAQ	ATRA	Mon, Jun 8, 2020	9.97	10.43	9.55	10.22
1419	NASDAQ	ATRA	Fri, Jun 5, 2020	10.04	10.63	9.68	9.74
1418	NASDAQ	ATRA	Thu, Jun 4, 2020	10.42	10.54	9.56	9.67
1417	NASDAQ	ATRA	Wed, Jun 3, 2020	10.70	10.76	10.27	10.57
1416	NASDAQ	ATRA	Tue, Jun 2, 2020	11.03	11.13	10.18	10.52
1415	NASDAQ	ATRA	Mon, Jun 1, 2020	11.38	11.58	10.98	11.02
1414	NASDAQ	ATRA	Fri, May 29, 2020	11.28	11.62	11.15	11.50
1413	NASDAQ	ATRA	Thu, May 28, 2020	11.25	11.72	11.21	11.24
1412	NASDAQ	ATRA	Wed, May 27, 2020	11.65	11.66	11.00	11.13
1411	NASDAQ	ATRA	Tue, May 26, 2020	15.59	15.77	11.16	11.32
1410	NASDAQ	ATRA	Fri, May 22, 2020	15.13	19.36	14.23	14.81
1409	NASDAQ	ATRA	Thu, May 21, 2020	14.17	15.06	13.75	14.93
1408	NASDAQ	ATRA	Wed, May 20, 2020	11.40	14.96	11.30	14.27
1407	NASDAQ	ATRA	Tue, May 19, 2020	11.29	11.54	10.88	11.07
1406	NASDAQ	ATRA	Mon, May 18, 2020	11.24	11.64	11.05	11.10
1405	NASDAQ	ATRA	Fri, May 15, 2020	9.49	10.77	9.36	10.77
1404	NASDAQ	ATRA	Thu, May 14, 2020	10.00	10.17	9.45	9.58
1403	NASDAQ	ATRA	Wed, May 13, 2020	10.65	11.38	9.70	10.36
1402	NASDAQ	ATRA	Tue, May 12, 2020	10.53	11.88	10.31	10.70
1401	NASDAQ	ATRA	Mon, May 11, 2020	10.20	10.43	9.78	10.25
1400	NASDAQ	ATRA	Fri, May 8, 2020	9.26	10.50	9.08	10.14
1399	NASDAQ	ATRA	Thu, May 7, 2020	8.77	9.26	8.67	9.15
1398	NASDAQ	ATRA	Wed, May 6, 2020	8.80	8.86	8.39	8.50
1397	NASDAQ	ATRA	Tue, May 5, 2020	8.99	8.99	8.49	8.72
1396	NASDAQ	ATRA	Mon, May 4, 2020	7.86	8.81	7.83	8.80
1395	NASDAQ	ATRA	Fri, May 1, 2020	8.03	8.06	7.45	7.92
1394	NASDAQ	ATRA	Thu, Apr 30, 2020	8.48	8.65	8.18	8.29
1393	NASDAQ	ATRA	Wed, Apr 29, 2020	9.04	9.04	8.46	8.53
1392	NASDAQ	ATRA	Tue, Apr 28, 2020	9.28	9.53	8.68	8.71
1391	NASDAQ	ATRA	Mon, Apr 27, 2020	9.01	9.23	8.82	8.97
1390	NASDAQ	ATRA	Fri, Apr 24, 2020	8.60	9.00	8.40	8.86
1389	NASDAQ	ATRA	Thu, Apr 23, 2020	8.88	9.80	8.38	8.56
1388	NASDAQ	ATRA	Wed, Apr 22, 2020	8.25	8.35	7.82	8.19
1387	NASDAQ	ATRA	Tue, Apr 21, 2020	8.02	8.34	7.83	8.00
1386	NASDAQ	ATRA	Mon, Apr 20, 2020	8.42	8.95	8.11	8.20
1385	NASDAQ	ATRA	Fri, Apr 17, 2020	8.43	8.69	8.08	8.66
1384	NASDAQ	ATRA	Thu, Apr 16, 2020	7.93	8.27	7.50	8.22
1383	NASDAQ	ATRA	Wed, Apr 15, 2020	8.54	8.74	7.64	7.92
1382	NASDAQ	ATRA	Tue, Apr 14, 2020	8.61	8.94	8.42	8.89
1381	NASDAQ	ATRA	Mon, Apr 13, 2020	8.63	8.87	8.13	8.42
1380	NASDAQ	ATRA	Thu, Apr 9, 2020	8.00	8.82	7.79	8.55
1379	NASDAQ	ATRA	Wed, Apr 8, 2020	7.95	8.00	7.47	7.76
1378	NASDAQ	ATRA	Tue, Apr 7, 2020	8.52	8.52	7.14	7.70
1377	NASDAQ	ATRA	Mon, Apr 6, 2020	7.94	8.18	7.74	8.13
1376	NASDAQ	ATRA	Fri, Apr 3, 2020	8.18	8.28	7.35	7.53
1375	NASDAQ	ATRA	Thu, Apr 2, 2020	7.89	8.27	7.63	8.18
1374	NASDAQ	ATRA	Wed, Apr 1, 2020	8.20	8.49	7.71	7.78
1373	NASDAQ	ATRA	Tue, Mar 31, 2020	8.69	8.94	8.29	8.51
1372	NASDAQ	ATRA	Mon, Mar 30, 2020	8.51	9.00	8.17	8.67
1371	NASDAQ	ATRA	Fri, Mar 27, 2020	9.17	9.45	8.19	8.44
1370	NASDAQ	ATRA	Thu, Mar 26, 2020	9.15	9.81	8.95	9.64
1369	NASDAQ	ATRA	Wed, Mar 25, 2020	9.35	9.87	8.84	9.03
1368	NASDAQ	ATRA	Tue, Mar 24, 2020	8.00	9.38	7.80	9.35
1367	NASDAQ	ATRA	Mon, Mar 23, 2020	8.07	8.29	7.54	7.89
1366	NASDAQ	ATRA	Fri, Mar 20, 2020	8.00	8.27	7.26	8.10
1365	NASDAQ	ATRA	Thu, Mar 19, 2020	6.27	8.01	6.16	7.98
1364	NASDAQ	ATRA	Wed, Mar 18, 2020	5.47	6.34	4.52	6.27
1363	NASDAQ	ATRA	Tue, Mar 17, 2020	6.48	6.53	5.42	5.69
1362	NASDAQ	ATRA	Mon, Mar 16, 2020	7.70	7.99	6.14	6.14
1361	NASDAQ	ATRA	Fri, Mar 13, 2020	8.67	8.73	6.49	8.32
1360	NASDAQ	ATRA	Thu, Mar 12, 2020	9.14	9.67	8.05	8.15
1359	NASDAQ	ATRA	Wed, Mar 11, 2020	10.52	10.76	9.74	9.96
1358	NASDAQ	ATRA	Tue, Mar 10, 2020	11.83	11.83	10.16	10.77
1357	NASDAQ	ATRA	Mon, Mar 9, 2020	11.47	12.24	11.20	11.30
1356	NASDAQ	ATRA	Fri, Mar 6, 2020	12.53	13.10	12.12	12.45
1355	NASDAQ	ATRA	Thu, Mar 5, 2020	12.91	13.52	12.75	12.94
1354	NASDAQ	ATRA	Wed, Mar 4, 2020	12.87	13.37	12.69	13.17
1353	NASDAQ	ATRA	Tue, Mar 3, 2020	13.00	13.44	11.99	12.45
1352	NASDAQ	ATRA	Mon, Mar 2, 2020	12.25	13.08	12.02	13.08
1351	NASDAQ	ATRA	Fri, Feb 28, 2020	10.63	12.28	10.62	12.15
1350	NASDAQ	ATRA	Thu, Feb 27, 2020	10.52	11.94	10.18	11.48
1349	NASDAQ	ATRA	Wed, Feb 26, 2020	11.31	11.61	10.97	11.17
1348	NASDAQ	ATRA	Tue, Feb 25, 2020	11.92	12.14	11.00	11.12
1347	NASDAQ	ATRA	Mon, Feb 24, 2020	12.66	12.71	11.57	11.84
1346	NASDAQ	ATRA	Fri, Feb 21, 2020	13.61	13.81	13.12	13.19
1345	NASDAQ	ATRA	Thu, Feb 20, 2020	14.85	15.05	13.23	13.52
1344	NASDAQ	ATRA	Wed, Feb 19, 2020	14.56	14.86	14.44	14.76
1343	NASDAQ	ATRA	Tue, Feb 18, 2020	14.30	14.57	13.89	14.56
1342	NASDAQ	ATRA	Fri, Feb 14, 2020	13.65	14.39	13.27	14.26
1341	NASDAQ	ATRA	Thu, Feb 13, 2020	14.25	14.38	13.63	13.65
1340	NASDAQ	ATRA	Wed, Feb 12, 2020	14.53	14.65	13.92	14.24
1339	NASDAQ	ATRA	Tue, Feb 11, 2020	14.45	14.85	14.14	14.35
1338	NASDAQ	ATRA	Mon, Feb 10, 2020	13.30	14.38	12.80	14.37
1337	NASDAQ	ATRA	Fri, Feb 7, 2020	14.21	14.44	13.16	13.18
1336	NASDAQ	ATRA	Thu, Feb 6, 2020	15.09	15.09	14.45	14.47
1335	NASDAQ	ATRA	Wed, Feb 5, 2020	14.16	15.53	13.97	14.96
1334	NASDAQ	ATRA	Tue, Feb 4, 2020	14.08	14.44	13.86	13.97
1333	NASDAQ	ATRA	Mon, Feb 3, 2020	13.39	13.80	13.30	13.79
1332	NASDAQ	ATRA	Fri, Jan 31, 2020	13.54	13.65	13.03	13.23
1331	NASDAQ	ATRA	Thu, Jan 30, 2020	13.65	13.91	13.44	13.61
1330	NASDAQ	ATRA	Wed, Jan 29, 2020	14.17	14.36	13.66	13.79
1329	NASDAQ	ATRA	Tue, Jan 28, 2020	13.83	14.42	13.83	14.00
1328	NASDAQ	ATRA	Mon, Jan 27, 2020	13.27	13.82	13.13	13.65
1327	NASDAQ	ATRA	Fri, Jan 24, 2020	14.05	14.23	13.55	13.62
1326	NASDAQ	ATRA	Thu, Jan 23, 2020	14.47	14.59	13.99	14.04
1325	NASDAQ	ATRA	Wed, Jan 22, 2020	14.66	14.84	14.40	14.64
1324	NASDAQ	ATRA	Tue, Jan 21, 2020	14.97	15.52	14.58	14.64
1323	NASDAQ	ATRA	Fri, Jan 17, 2020	16.08	16.15	15.03	15.03
1322	NASDAQ	ATRA	Thu, Jan 16, 2020	16.92	17.11	15.93	15.99
1321	NASDAQ	ATRA	Wed, Jan 15, 2020	16.94	17.23	16.54	16.73
1320	NASDAQ	ATRA	Tue, Jan 14, 2020	16.18	17.12	15.87	16.80
1319	NASDAQ	ATRA	Mon, Jan 13, 2020	16.63	16.63	15.51	16.19
1318	NASDAQ	ATRA	Fri, Jan 10, 2020	16.97	17.24	16.50	16.52
1317	NASDAQ	ATRA	Thu, Jan 9, 2020	17.94	17.94	16.78	16.97
1316	NASDAQ	ATRA	Wed, Jan 8, 2020	17.18	17.93	17.09	17.78
1315	NASDAQ	ATRA	Tue, Jan 7, 2020	16.95	17.37	16.47	17.23
1314	NASDAQ	ATRA	Mon, Jan 6, 2020	15.82	17.00	15.51	16.86
1313	NASDAQ	ATRA	Fri, Jan 3, 2020	16.03	16.68	15.83	16.05
1312	NASDAQ	ATRA	Thu, Jan 2, 2020	16.71	16.78	15.91	16.41
1311	NASDAQ	ATRA	Tue, Dec 31, 2019	16.07	16.53	16.03	16.47
1310	NASDAQ	ATRA	Mon, Dec 30, 2019	16.55	16.60	15.96	16.09
1309	NASDAQ	ATRA	Fri, Dec 27, 2019	16.06	16.64	15.65	16.51
1308	NASDAQ	ATRA	Thu, Dec 26, 2019	17.08	17.15	15.68	16.00
1307	NASDAQ	ATRA	Tue, Dec 24, 2019	15.97	16.85	15.82	16.79
1306	NASDAQ	ATRA	Mon, Dec 23, 2019	15.36	15.95	15.05	15.94
1305	NASDAQ	ATRA	Fri, Dec 20, 2019	15.00	15.36	14.41	15.20
1304	NASDAQ	ATRA	Thu, Dec 19, 2019	15.13	15.72	14.98	15.00
1303	NASDAQ	ATRA	Wed, Dec 18, 2019	15.30	15.50	14.90	15.20
1302	NASDAQ	ATRA	Tue, Dec 17, 2019	15.63	15.83	14.90	15.37
1301	NASDAQ	ATRA	Mon, Dec 16, 2019	15.64	16.15	15.49	15.61
1300	NASDAQ	ATRA	Fri, Dec 13, 2019	16.03	16.22	15.31	15.45
1299	NASDAQ	ATRA	Thu, Dec 12, 2019	15.73	16.40	15.63	15.99
1298	NASDAQ	ATRA	Wed, Dec 11, 2019	14.85	15.86	14.85	15.70
1297	NASDAQ	ATRA	Tue, Dec 10, 2019	14.91	15.18	14.75	14.88
1296	NASDAQ	ATRA	Mon, Dec 9, 2019	13.94	15.04	13.94	14.67
1295	NASDAQ	ATRA	Fri, Dec 6, 2019	13.74	14.09	13.57	13.99
1294	NASDAQ	ATRA	Thu, Dec 5, 2019	14.15	14.39	13.59	13.68
1293	NASDAQ	ATRA	Wed, Dec 4, 2019	13.96	14.48	13.84	14.15
1292	NASDAQ	ATRA	Tue, Dec 3, 2019	13.41	13.88	13.27	13.83
1291	NASDAQ	ATRA	Mon, Dec 2, 2019	14.09	14.24	13.37	13.57
1290	NASDAQ	ATRA	Fri, Nov 29, 2019	13.96	14.27	13.96	14.21
1289	NASDAQ	ATRA	Wed, Nov 27, 2019	13.90	14.14	13.80	14.02
1288	NASDAQ	ATRA	Tue, Nov 26, 2019	14.02	14.11	13.76	13.87
1287	NASDAQ	ATRA	Mon, Nov 25, 2019	14.07	14.38	13.95	14.01
1286	NASDAQ	ATRA	Fri, Nov 22, 2019	13.81	13.91	13.55	13.84
1285	NASDAQ	ATRA	Thu, Nov 21, 2019	14.29	14.29	13.52	13.74
1284	NASDAQ	ATRA	Wed, Nov 20, 2019	13.85	14.46	13.78	14.22
1283	NASDAQ	ATRA	Tue, Nov 19, 2019	13.86	14.56	13.78	14.26
1282	NASDAQ	ATRA	Mon, Nov 18, 2019	13.18	13.85	13.13	13.76
1281	NASDAQ	ATRA	Fri, Nov 15, 2019	13.32	13.64	13.10	13.20
1280	NASDAQ	ATRA	Thu, Nov 14, 2019	13.03	13.34	12.87	13.21
1279	NASDAQ	ATRA	Wed, Nov 13, 2019	12.86	13.40	12.73	13.11
1278	NASDAQ	ATRA	Tue, Nov 12, 2019	13.03	13.35	12.81	13.00
1277	NASDAQ	ATRA	Mon, Nov 11, 2019	13.21	13.65	12.87	13.05
1276	NASDAQ	ATRA	Fri, Nov 8, 2019	12.63	13.45	12.52	13.40
1275	NASDAQ	ATRA	Thu, Nov 7, 2019	12.58	14.04	12.58	13.52
1274	NASDAQ	ATRA	Wed, Nov 6, 2019	12.64	12.64	12.01	12.16
1273	NASDAQ	ATRA	Tue, Nov 5, 2019	12.41	12.87	12.11	12.64
1272	NASDAQ	ATRA	Mon, Nov 4, 2019	12.20	12.56	11.89	12.40
1271	NASDAQ	ATRA	Fri, Nov 1, 2019	11.07	12.19	10.98	12.12
1270	NASDAQ	ATRA	Thu, Oct 31, 2019	10.76	11.10	10.38	10.92
1269	NASDAQ	ATRA	Wed, Oct 30, 2019	11.31	11.45	10.84	10.89
1268	NASDAQ	ATRA	Tue, Oct 29, 2019	12.30	12.40	11.31	11.35
1267	NASDAQ	ATRA	Mon, Oct 28, 2019	12.32	12.80	12.14	12.30
1266	NASDAQ	ATRA	Fri, Oct 25, 2019	12.59	12.67	11.75	12.29
1265	NASDAQ	ATRA	Thu, Oct 24, 2019	12.96	13.05	12.49	12.68
1264	NASDAQ	ATRA	Wed, Oct 23, 2019	13.00	13.05	12.73	12.84
1263	NASDAQ	ATRA	Tue, Oct 22, 2019	12.56	13.21	12.54	13.00
1262	NASDAQ	ATRA	Mon, Oct 21, 2019	12.45	12.61	12.22	12.41
1261	NASDAQ	ATRA	Fri, Oct 18, 2019	13.16	13.29	12.33	12.35
1260	NASDAQ	ATRA	Thu, Oct 17, 2019	13.03	13.57	13.01	13.26
1259	NASDAQ	ATRA	Wed, Oct 16, 2019	12.80	13.48	12.75	12.95
1258	NASDAQ	ATRA	Tue, Oct 15, 2019	12.25	12.78	12.04	12.76
1257	NASDAQ	ATRA	Mon, Oct 14, 2019	13.32	13.32	11.90	12.17
1256	NASDAQ	ATRA	Fri, Oct 11, 2019	13.48	13.64	13.22	13.35
1255	NASDAQ	ATRA	Thu, Oct 10, 2019	13.45	13.77	13.03	13.25
1254	NASDAQ	ATRA	Wed, Oct 9, 2019	13.72	13.80	13.35	13.42
1253	NASDAQ	ATRA	Tue, Oct 8, 2019	13.92	14.11	13.55	13.60
1252	NASDAQ	ATRA	Mon, Oct 7, 2019	14.01	14.25	13.93	14.04
1251	NASDAQ	ATRA	Fri, Oct 4, 2019	13.86	14.13	13.70	14.08
1250	NASDAQ	ATRA	Thu, Oct 3, 2019	13.70	14.17	13.46	13.86
1249	NASDAQ	ATRA	Wed, Oct 2, 2019	13.16	13.81	12.55	13.74
1248	NASDAQ	ATRA	Tue, Oct 1, 2019	14.17	14.31	13.03	13.24
1247	NASDAQ	ATRA	Mon, Sep 30, 2019	13.41	14.23	13.09	14.12
1246	NASDAQ	ATRA	Fri, Sep 27, 2019	11.85	13.55	11.50	13.46
1245	NASDAQ	ATRA	Thu, Sep 26, 2019	14.30	14.32	13.41	13.58
1244	NASDAQ	ATRA	Wed, Sep 25, 2019	14.52	15.04	14.16	14.29
1243	NASDAQ	ATRA	Tue, Sep 24, 2019	15.00	15.32	14.33	14.73
1242	NASDAQ	ATRA	Mon, Sep 23, 2019	15.80	15.88	14.81	15.00
1241	NASDAQ	ATRA	Fri, Sep 20, 2019	15.19	15.94	15.10	15.81
1240	NASDAQ	ATRA	Thu, Sep 19, 2019	15.20	15.59	14.83	15.23
1239	NASDAQ	ATRA	Wed, Sep 18, 2019	15.54	15.93	15.00	15.24
1238	NASDAQ	ATRA	Tue, Sep 17, 2019	14.81	15.98	14.51	15.64
1237	NASDAQ	ATRA	Mon, Sep 16, 2019	14.40	15.11	14.05	14.99
1236	NASDAQ	ATRA	Fri, Sep 13, 2019	17.00	17.51	15.10	15.16
1235	NASDAQ	ATRA	Thu, Sep 12, 2019	16.47	16.47	15.16	15.58
1234	NASDAQ	ATRA	Wed, Sep 11, 2019	15.85	16.28	15.65	16.24
1233	NASDAQ	ATRA	Tue, Sep 10, 2019	14.70	15.63	14.66	15.62
1232	NASDAQ	ATRA	Mon, Sep 9, 2019	14.08	14.78	13.47	14.74
1231	NASDAQ	ATRA	Fri, Sep 6, 2019	13.95	14.35	13.56	14.00
1230	NASDAQ	ATRA	Thu, Sep 5, 2019	12.95	14.12	12.89	13.94
1229	NASDAQ	ATRA	Wed, Sep 4, 2019	12.75	13.18	12.15	12.59
1228	NASDAQ	ATRA	Tue, Sep 3, 2019	13.43	13.57	12.42	12.62
1227	NASDAQ	ATRA	Fri, Aug 30, 2019	13.92	14.06	13.45	13.50
1226	NASDAQ	ATRA	Thu, Aug 29, 2019	13.80	13.96	13.38	13.81
1225	NASDAQ	ATRA	Wed, Aug 28, 2019	13.02	13.74	12.91	13.66
1224	NASDAQ	ATRA	Tue, Aug 27, 2019	13.60	13.98	13.04	13.13
1223	NASDAQ	ATRA	Mon, Aug 26, 2019	13.24	13.50	12.84	13.46
1222	NASDAQ	ATRA	Fri, Aug 23, 2019	13.51	13.69	12.96	13.06
1221	NASDAQ	ATRA	Thu, Aug 22, 2019	13.97	14.05	13.40	13.54
1220	NASDAQ	ATRA	Wed, Aug 21, 2019	14.03	14.29	13.74	13.93
1219	NASDAQ	ATRA	Tue, Aug 20, 2019	14.01	14.30	13.71	13.97
1218	NASDAQ	ATRA	Mon, Aug 19, 2019	14.10	14.36	13.74	14.01
1217	NASDAQ	ATRA	Fri, Aug 16, 2019	13.52	14.24	13.46	14.06
1216	NASDAQ	ATRA	Thu, Aug 15, 2019	14.02	14.30	13.17	13.35
1215	NASDAQ	ATRA	Wed, Aug 14, 2019	13.79	14.21	13.39	14.05
1214	NASDAQ	ATRA	Tue, Aug 13, 2019	13.37	14.18	13.27	14.11
1213	NASDAQ	ATRA	Mon, Aug 12, 2019	13.26	13.86	13.16	13.49
1212	NASDAQ	ATRA	Fri, Aug 9, 2019	12.20	13.46	12.20	13.31
1211	NASDAQ	ATRA	Thu, Aug 8, 2019	11.89	12.83	11.89	12.54
1210	NASDAQ	ATRA	Wed, Aug 7, 2019	12.22	12.45	11.95	12.03
1209	NASDAQ	ATRA	Tue, Aug 6, 2019	12.45	12.58	12.05	12.46
1208	NASDAQ	ATRA	Mon, Aug 5, 2019	12.59	12.83	12.02	12.23
1207	NASDAQ	ATRA	Fri, Aug 2, 2019	13.85	14.06	12.78	12.87
1206	NASDAQ	ATRA	Thu, Aug 1, 2019	14.29	14.45	13.76	13.85
1205	NASDAQ	ATRA	Wed, Jul 31, 2019	14.49	15.00	14.21	14.27
1204	NASDAQ	ATRA	Tue, Jul 30, 2019	14.52	14.69	14.36	14.58
1203	NASDAQ	ATRA	Mon, Jul 29, 2019	14.65	14.78	14.30	14.72
1202	NASDAQ	ATRA	Fri, Jul 26, 2019	14.34	14.74	14.21	14.70
1201	NASDAQ	ATRA	Thu, Jul 25, 2019	14.95	15.02	14.23	14.26
1200	NASDAQ	ATRA	Wed, Jul 24, 2019	14.73	15.12	14.67	15.06
1199	NASDAQ	ATRA	Tue, Jul 23, 2019	15.16	15.19	14.55	14.79
1198	NASDAQ	ATRA	Mon, Jul 22, 2019	15.13	15.57	14.60	15.11
1197	NASDAQ	ATRA	Fri, Jul 19, 2019	17.17	17.20	14.75	15.13
1196	NASDAQ	ATRA	Thu, Jul 18, 2019	14.92	15.35	14.31	15.28
1195	NASDAQ	ATRA	Wed, Jul 17, 2019	15.93	16.08	14.92	15.01
1194	NASDAQ	ATRA	Tue, Jul 16, 2019	17.81	18.37	15.31	15.93
1193	NASDAQ	ATRA	Mon, Jul 15, 2019	18.42	18.42	17.98	18.09
1192	NASDAQ	ATRA	Fri, Jul 12, 2019	18.27	18.59	18.10	18.31
1191	NASDAQ	ATRA	Thu, Jul 11, 2019	18.34	18.55	17.69	18.32
1190	NASDAQ	ATRA	Wed, Jul 10, 2019	18.62	19.24	18.19	18.29
1189	NASDAQ	ATRA	Tue, Jul 9, 2019	18.53	18.98	18.30	18.61
1188	NASDAQ	ATRA	Mon, Jul 8, 2019	19.72	19.90	18.34	18.69
1187	NASDAQ	ATRA	Fri, Jul 5, 2019	19.68	19.95	19.25	19.74
1186	NASDAQ	ATRA	Wed, Jul 3, 2019	19.92	19.92	19.17	19.76
1185	NASDAQ	ATRA	Tue, Jul 2, 2019	19.79	20.56	19.47	19.94
1184	NASDAQ	ATRA	Mon, Jul 1, 2019	21.00	21.45	19.40	19.60
1183	NASDAQ	ATRA	Fri, Jun 28, 2019	20.25	20.51	19.69	20.11
1182	NASDAQ	ATRA	Thu, Jun 27, 2019	19.22	20.31	18.95	20.25
1181	NASDAQ	ATRA	Wed, Jun 26, 2019	19.80	20.10	18.76	19.05
1180	NASDAQ	ATRA	Tue, Jun 25, 2019	20.65	20.78	19.95	20.00
1179	NASDAQ	ATRA	Mon, Jun 24, 2019	21.23	21.50	20.17	20.43
1178	NASDAQ	ATRA	Fri, Jun 21, 2019	21.26	21.67	20.36	21.43
1177	NASDAQ	ATRA	Thu, Jun 20, 2019	22.06	22.42	20.99	21.39
1176	NASDAQ	ATRA	Wed, Jun 19, 2019	22.05	22.39	21.60	21.82
1175	NASDAQ	ATRA	Tue, Jun 18, 2019	22.32	22.46	21.76	21.96
1174	NASDAQ	ATRA	Mon, Jun 17, 2019	22.11	22.59	21.73	22.07
1173	NASDAQ	ATRA	Fri, Jun 14, 2019	22.10	22.18	21.54	21.85
1172	NASDAQ	ATRA	Thu, Jun 13, 2019	22.11	22.24	21.74	22.05
1171	NASDAQ	ATRA	Wed, Jun 12, 2019	22.13	22.13	21.31	21.90
1170	NASDAQ	ATRA	Tue, Jun 11, 2019	22.59	22.61	21.55	22.23
1169	NASDAQ	ATRA	Mon, Jun 10, 2019	22.30	22.67	21.75	22.34
1168	NASDAQ	ATRA	Fri, Jun 7, 2019	22.56	22.93	21.79	22.08
1167	NASDAQ	ATRA	Thu, Jun 6, 2019	23.24	23.43	21.70	22.60
1166	NASDAQ	ATRA	Wed, Jun 5, 2019	24.33	24.75	22.81	23.17
1165	NASDAQ	ATRA	Tue, Jun 4, 2019	23.96	24.50	23.52	24.19
1164	NASDAQ	ATRA	Mon, Jun 3, 2019	22.04	23.87	22.04	23.32
1163	NASDAQ	ATRA	Fri, May 31, 2019	22.71	22.82	22.00	22.21
1162	NASDAQ	ATRA	Thu, May 30, 2019	23.67	23.93	22.47	22.78
1161	NASDAQ	ATRA	Wed, May 29, 2019	22.10	23.40	21.61	23.30
1160	NASDAQ	ATRA	Tue, May 28, 2019	23.40	23.76	22.12	22.33
1159	NASDAQ	ATRA	Fri, May 24, 2019	23.66	24.32	22.75	23.21
1158	NASDAQ	ATRA	Thu, May 23, 2019	23.29	23.65	22.05	23.49
1157	NASDAQ	ATRA	Wed, May 22, 2019	24.19	24.47	23.00	23.16
1156	NASDAQ	ATRA	Tue, May 21, 2019	23.68	24.40	23.00	24.37
1155	NASDAQ	ATRA	Mon, May 20, 2019	23.72	24.14	23.12	23.47
1154	NASDAQ	ATRA	Fri, May 17, 2019	23.91	24.73	23.80	23.99
1153	NASDAQ	ATRA	Thu, May 16, 2019	25.00	25.38	23.70	24.17
1152	NASDAQ	ATRA	Wed, May 15, 2019	24.49	24.96	24.31	24.85
1151	NASDAQ	ATRA	Tue, May 14, 2019	24.44	25.22	23.90	24.99
1150	NASDAQ	ATRA	Mon, May 13, 2019	25.15	25.50	23.58	24.20
1149	NASDAQ	ATRA	Fri, May 10, 2019	27.35	27.35	25.83	26.00
1148	NASDAQ	ATRA	Thu, May 9, 2019	33.48	33.48	26.25	27.22
1147	NASDAQ	ATRA	Wed, May 8, 2019	33.39	34.87	33.24	34.28
1146	NASDAQ	ATRA	Tue, May 7, 2019	35.63	35.81	33.26	33.46
1145	NASDAQ	ATRA	Mon, May 6, 2019	33.68	36.55	33.68	36.26
1144	NASDAQ	ATRA	Fri, May 3, 2019	34.03	34.75	33.69	34.63
1143	NASDAQ	ATRA	Thu, May 2, 2019	32.71	33.88	32.50	33.79
1142	NASDAQ	ATRA	Wed, May 1, 2019	33.88	34.09	32.52	32.66
1141	NASDAQ	ATRA	Tue, Apr 30, 2019	34.59	34.92	32.79	33.60
1140	NASDAQ	ATRA	Mon, Apr 29, 2019	34.00	35.05	33.71	34.70
1139	NASDAQ	ATRA	Fri, Apr 26, 2019	33.50	33.94	32.99	33.83
1138	NASDAQ	ATRA	Thu, Apr 25, 2019	33.13	34.05	32.70	33.41
1137	NASDAQ	ATRA	Wed, Apr 24, 2019	33.41	33.62	32.25	33.23
1136	NASDAQ	ATRA	Tue, Apr 23, 2019	31.68	33.88	31.43	33.49
1135	NASDAQ	ATRA	Mon, Apr 22, 2019	31.65	32.03	30.75	31.69
1134	NASDAQ	ATRA	Thu, Apr 18, 2019	32.60	33.05	31.09	31.86
1133	NASDAQ	ATRA	Wed, Apr 17, 2019	35.69	35.69	32.55	32.58
1132	NASDAQ	ATRA	Tue, Apr 16, 2019	35.70	35.99	35.05	35.67
1131	NASDAQ	ATRA	Mon, Apr 15, 2019	36.17	36.55	34.69	35.32
1130	NASDAQ	ATRA	Fri, Apr 12, 2019	36.43	36.62	35.59	36.05
1129	NASDAQ	ATRA	Thu, Apr 11, 2019	37.42	37.42	35.88	36.15
1128	NASDAQ	ATRA	Wed, Apr 10, 2019	37.07	37.59	36.72	37.17
1127	NASDAQ	ATRA	Tue, Apr 9, 2019	38.50	38.50	36.69	36.85
1126	NASDAQ	ATRA	Mon, Apr 8, 2019	39.86	40.25	38.50	38.55
1125	NASDAQ	ATRA	Fri, Apr 5, 2019	40.96	41.93	39.70	39.92
1124	NASDAQ	ATRA	Thu, Apr 4, 2019	41.08	41.62	39.71	40.72
1123	NASDAQ	ATRA	Wed, Apr 3, 2019	40.14	41.20	40.01	41.04
1122	NASDAQ	ATRA	Tue, Apr 2, 2019	40.00	40.59	39.60	39.98
1121	NASDAQ	ATRA	Mon, Apr 1, 2019	40.26	41.38	39.56	39.85
1120	NASDAQ	ATRA	Fri, Mar 29, 2019	39.16	41.81	38.76	39.75
1119	NASDAQ	ATRA	Thu, Mar 28, 2019	36.05	38.68	35.88	38.64
1118	NASDAQ	ATRA	Wed, Mar 27, 2019	37.77	38.00	35.74	35.78
1117	NASDAQ	ATRA	Tue, Mar 26, 2019	36.99	37.84	36.54	37.83
1116	NASDAQ	ATRA	Mon, Mar 25, 2019	37.38	37.89	36.40	36.50
1115	NASDAQ	ATRA	Fri, Mar 22, 2019	39.57	40.05	37.34	37.44
1114	NASDAQ	ATRA	Thu, Mar 21, 2019	38.75	40.24	38.57	39.98
1113	NASDAQ	ATRA	Wed, Mar 20, 2019	39.12	39.79	38.43	38.86
1112	NASDAQ	ATRA	Tue, Mar 19, 2019	39.39	39.99	39.04	39.29
1111	NASDAQ	ATRA	Mon, Mar 18, 2019	38.40	39.97	38.11	39.18
1110	NASDAQ	ATRA	Fri, Mar 15, 2019	39.09	39.46	38.08	38.34
1109	NASDAQ	ATRA	Thu, Mar 14, 2019	40.10	41.14	38.91	38.98
1108	NASDAQ	ATRA	Wed, Mar 13, 2019	39.66	40.73	39.56	40.65
1107	NASDAQ	ATRA	Tue, Mar 12, 2019	37.20	39.76	37.12	39.60
1106	NASDAQ	ATRA	Mon, Mar 11, 2019	36.60	37.09	35.81	37.06
1105	NASDAQ	ATRA	Fri, Mar 8, 2019	36.59	36.91	35.94	36.52
1104	NASDAQ	ATRA	Thu, Mar 7, 2019	36.71	37.47	36.02	36.79
1103	NASDAQ	ATRA	Wed, Mar 6, 2019	39.12	39.16	36.27	36.62
1102	NASDAQ	ATRA	Tue, Mar 5, 2019	38.79	40.13	38.64	39.04
1101	NASDAQ	ATRA	Mon, Mar 4, 2019	38.26	38.98	37.60	38.92
1100	NASDAQ	ATRA	Fri, Mar 1, 2019	36.35	38.20	35.86	38.20
1099	NASDAQ	ATRA	Thu, Feb 28, 2019	36.21	36.80	35.68	35.81
1098	NASDAQ	ATRA	Wed, Feb 27, 2019	36.81	36.95	34.86	36.20
1097	NASDAQ	ATRA	Tue, Feb 26, 2019	41.03	41.97	35.02	37.26
1096	NASDAQ	ATRA	Mon, Feb 25, 2019	39.42	41.87	39.42	41.74
1095	NASDAQ	ATRA	Fri, Feb 22, 2019	38.17	38.88	37.83	38.58
1094	NASDAQ	ATRA	Thu, Feb 21, 2019	39.28	39.28	37.66	38.17
1093	NASDAQ	ATRA	Wed, Feb 20, 2019	40.51	40.51	38.72	39.38
1092	NASDAQ	ATRA	Tue, Feb 19, 2019	40.45	41.35	39.83	40.27
1091	NASDAQ	ATRA	Fri, Feb 15, 2019	39.72	40.69	39.23	40.45
1090	NASDAQ	ATRA	Thu, Feb 14, 2019	39.06	39.58	38.51	39.43
1089	NASDAQ	ATRA	Wed, Feb 13, 2019	39.56	39.82	38.88	39.23
1088	NASDAQ	ATRA	Tue, Feb 12, 2019	38.84	39.98	38.25	39.27
1087	NASDAQ	ATRA	Mon, Feb 11, 2019	38.74	39.16	37.60	38.68
1086	NASDAQ	ATRA	Fri, Feb 8, 2019	37.52	39.08	37.22	38.49
1085	NASDAQ	ATRA	Thu, Feb 7, 2019	38.20	38.75	37.12	37.80
1084	NASDAQ	ATRA	Wed, Feb 6, 2019	38.32	38.99	37.49	38.47
1083	NASDAQ	ATRA	Tue, Feb 5, 2019	38.74	39.73	37.76	38.35
1082	NASDAQ	ATRA	Mon, Feb 4, 2019	37.64	38.98	37.52	38.68
1081	NASDAQ	ATRA	Fri, Feb 1, 2019	38.21	39.00	37.10	37.59
1080	NASDAQ	ATRA	Thu, Jan 31, 2019	35.86	38.00	35.72	38.00
1079	NASDAQ	ATRA	Wed, Jan 30, 2019	35.05	36.36	34.32	36.17
1078	NASDAQ	ATRA	Tue, Jan 29, 2019	34.60	34.94	33.79	34.58
1077	NASDAQ	ATRA	Mon, Jan 28, 2019	35.76	35.76	34.23	34.45
1076	NASDAQ	ATRA	Fri, Jan 25, 2019	35.09	36.09	34.14	35.93
1075	NASDAQ	ATRA	Thu, Jan 24, 2019	35.09	36.38	34.45	34.79
1074	NASDAQ	ATRA	Wed, Jan 23, 2019	36.44	37.27	34.28	35.02
1073	NASDAQ	ATRA	Tue, Jan 22, 2019	36.85	36.96	35.06	35.44
1072	NASDAQ	ATRA	Fri, Jan 18, 2019	36.57	37.37	35.84	37.25
1071	NASDAQ	ATRA	Thu, Jan 17, 2019	35.79	37.23	34.76	36.48
1070	NASDAQ	ATRA	Wed, Jan 16, 2019	36.49	37.73	35.45	36.01
1069	NASDAQ	ATRA	Tue, Jan 15, 2019	34.76	36.47	34.33	36.33
1068	NASDAQ	ATRA	Mon, Jan 14, 2019	34.68	35.15	34.22	34.66
1067	NASDAQ	ATRA	Fri, Jan 11, 2019	34.21	35.40	33.93	35.01
1066	NASDAQ	ATRA	Thu, Jan 10, 2019	33.82	34.92	33.05	34.57
1065	NASDAQ	ATRA	Wed, Jan 9, 2019	34.49	35.64	33.92	34.05
1064	NASDAQ	ATRA	Tue, Jan 8, 2019	32.56	34.51	31.74	34.42
1063	NASDAQ	ATRA	Mon, Jan 7, 2019	29.84	32.88	29.52	32.50
1062	NASDAQ	ATRA	Fri, Jan 4, 2019	29.37	31.30	29.11	29.96
1061	NASDAQ	ATRA	Thu, Jan 3, 2019	34.90	34.90	27.85	28.40
1060	NASDAQ	ATRA	Wed, Jan 2, 2019	34.05	35.27	32.43	35.26
1059	NASDAQ	ATRA	Mon, Dec 31, 2018	34.70	35.31	33.89	34.74
1058	NASDAQ	ATRA	Fri, Dec 28, 2018	34.44	35.82	33.85	34.33
1057	NASDAQ	ATRA	Thu, Dec 27, 2018	33.45	34.48	32.10	34.47
1056	NASDAQ	ATRA	Wed, Dec 26, 2018	31.23	34.26	30.63	34.25
1055	NASDAQ	ATRA	Mon, Dec 24, 2018	30.61	31.37	29.74	30.91
1054	NASDAQ	ATRA	Fri, Dec 21, 2018	33.78	33.82	30.89	30.90
1053	NASDAQ	ATRA	Thu, Dec 20, 2018	38.18	38.18	33.26	33.52
1052	NASDAQ	ATRA	Wed, Dec 19, 2018	39.25	40.90	37.48	38.25
1051	NASDAQ	ATRA	Tue, Dec 18, 2018	39.90	40.48	38.11	39.26
1050	NASDAQ	ATRA	Mon, Dec 17, 2018	41.20	41.20	37.05	39.54
1049	NASDAQ	ATRA	Fri, Dec 14, 2018	42.05	43.36	41.50	41.72
1048	NASDAQ	ATRA	Thu, Dec 13, 2018	42.80	43.38	42.28	42.61
1047	NASDAQ	ATRA	Wed, Dec 12, 2018	42.68	43.58	42.14	42.45
1046	NASDAQ	ATRA	Tue, Dec 11, 2018	43.67	43.93	41.35	42.36
1045	NASDAQ	ATRA	Mon, Dec 10, 2018	40.50	43.23	40.00	42.97
1044	NASDAQ	ATRA	Fri, Dec 7, 2018	39.74	41.38	39.74	40.20
1043	NASDAQ	ATRA	Thu, Dec 6, 2018	39.82	40.68	38.70	39.67
1042	NASDAQ	ATRA	Tue, Dec 4, 2018	42.50	43.94	40.40	40.45
1041	NASDAQ	ATRA	Mon, Dec 3, 2018	40.52	42.76	39.89	42.46
1040	NASDAQ	ATRA	Fri, Nov 30, 2018	40.37	41.64	38.79	39.95
1039	NASDAQ	ATRA	Thu, Nov 29, 2018	39.26	42.83	39.26	40.57
1038	NASDAQ	ATRA	Wed, Nov 28, 2018	38.76	39.83	37.36	39.74
1037	NASDAQ	ATRA	Tue, Nov 27, 2018	38.57	39.36	37.80	38.10
1036	NASDAQ	ATRA	Mon, Nov 26, 2018	38.80	39.36	37.86	38.75
1035	NASDAQ	ATRA	Fri, Nov 23, 2018	37.76	39.65	37.57	38.17
1034	NASDAQ	ATRA	Wed, Nov 21, 2018	36.18	38.59	35.74	38.36
1033	NASDAQ	ATRA	Tue, Nov 20, 2018	33.90	36.48	33.87	35.54
1032	NASDAQ	ATRA	Mon, Nov 19, 2018	36.86	37.12	34.86	35.43
1031	NASDAQ	ATRA	Fri, Nov 16, 2018	35.42	37.64	35.18	37.28
1030	NASDAQ	ATRA	Thu, Nov 15, 2018	33.65	36.20	33.65	35.85
1029	NASDAQ	ATRA	Wed, Nov 14, 2018	34.88	35.38	33.16	33.84
1028	NASDAQ	ATRA	Tue, Nov 13, 2018	33.98	35.88	33.78	34.76
1027	NASDAQ	ATRA	Mon, Nov 12, 2018	35.94	36.38	33.13	33.78
1026	NASDAQ	ATRA	Fri, Nov 9, 2018	37.91	38.11	35.82	36.23
1025	NASDAQ	ATRA	Thu, Nov 8, 2018	36.76	39.13	36.04	37.83
1024	NASDAQ	ATRA	Wed, Nov 7, 2018	35.88	38.31	35.57	36.84
1023	NASDAQ	ATRA	Tue, Nov 6, 2018	36.46	37.88	34.61	36.77
1022	NASDAQ	ATRA	Mon, Nov 5, 2018	38.00	38.52	35.67	37.54
1021	NASDAQ	ATRA	Fri, Nov 2, 2018	37.25	39.47	36.40	38.00
1020	NASDAQ	ATRA	Thu, Nov 1, 2018	34.47	37.86	34.47	37.18
1019	NASDAQ	ATRA	Wed, Oct 31, 2018	32.32	34.23	31.81	34.17
1018	NASDAQ	ATRA	Tue, Oct 30, 2018	31.99	32.57	30.73	31.61
1017	NASDAQ	ATRA	Mon, Oct 29, 2018	34.55	34.56	30.71	32.09
1016	NASDAQ	ATRA	Fri, Oct 26, 2018	33.28	35.27	32.72	33.94
1015	NASDAQ	ATRA	Thu, Oct 25, 2018	32.56	35.00	31.01	34.06
1014	NASDAQ	ATRA	Wed, Oct 24, 2018	34.51	35.24	31.63	32.18
1013	NASDAQ	ATRA	Tue, Oct 23, 2018	33.29	35.54	32.65	34.59
1012	NASDAQ	ATRA	Mon, Oct 22, 2018	35.05	35.30	33.08	34.12
1011	NASDAQ	ATRA	Fri, Oct 19, 2018	35.88	36.85	34.39	34.97
1010	NASDAQ	ATRA	Thu, Oct 18, 2018	38.11	38.13	35.46	35.77
1009	NASDAQ	ATRA	Wed, Oct 17, 2018	38.17	38.34	36.64	38.15
1008	NASDAQ	ATRA	Tue, Oct 16, 2018	36.06	38.48	35.50	38.35
1007	NASDAQ	ATRA	Mon, Oct 15, 2018	36.48	36.49	34.75	35.57
1006	NASDAQ	ATRA	Fri, Oct 12, 2018	36.44	37.49	35.67	36.42
1005	NASDAQ	ATRA	Thu, Oct 11, 2018	35.32	36.40	34.61	35.54
1004	NASDAQ	ATRA	Wed, Oct 10, 2018	36.83	36.83	35.20	35.53
1003	NASDAQ	ATRA	Tue, Oct 9, 2018	37.47	38.19	36.00	36.92
1002	NASDAQ	ATRA	Mon, Oct 8, 2018	40.03	40.50	36.69	37.64
1001	NASDAQ	ATRA	Fri, Oct 5, 2018	39.99	41.24	38.84	40.52
1000	NASDAQ	ATRA	Thu, Oct 4, 2018	42.04	42.04	39.50	40.02
999	NASDAQ	ATRA	Wed, Oct 3, 2018	39.99	42.73	39.16	42.16
998	NASDAQ	ATRA	Tue, Oct 2, 2018	40.98	41.23	39.17	39.77
997	NASDAQ	ATRA	Mon, Oct 1, 2018	41.47	42.43	40.46	40.67
996	NASDAQ	ATRA	Fri, Sep 28, 2018	40.85	41.90	39.80	41.35
995	NASDAQ	ATRA	Thu, Sep 27, 2018	42.00	43.00	40.70	40.80
994	NASDAQ	ATRA	Wed, Sep 26, 2018	43.40	43.95	41.85	42.10
993	NASDAQ	ATRA	Tue, Sep 25, 2018	40.90	43.80	39.80	43.50
992	NASDAQ	ATRA	Mon, Sep 24, 2018	39.80	40.70	39.10	40.70
991	NASDAQ	ATRA	Fri, Sep 21, 2018	40.75	41.90	39.45	39.85
990	NASDAQ	ATRA	Thu, Sep 20, 2018	40.10	41.50	39.65	40.80
989	NASDAQ	ATRA	Wed, Sep 19, 2018	39.50	40.70	39.39	40.00
988	NASDAQ	ATRA	Tue, Sep 18, 2018	39.45	40.25	38.90	39.70
987	NASDAQ	ATRA	Mon, Sep 17, 2018	41.10	41.87	38.95	39.10
986	NASDAQ	ATRA	Fri, Sep 14, 2018	40.65	42.40	40.30	41.10
985	NASDAQ	ATRA	Thu, Sep 13, 2018	40.15	41.35	39.70	40.75
984	NASDAQ	ATRA	Wed, Sep 12, 2018	41.10	42.05	39.91	40.25
983	NASDAQ	ATRA	Tue, Sep 11, 2018	39.50	41.15	38.90	41.05
982	NASDAQ	ATRA	Mon, Sep 10, 2018	39.80	40.20	38.80	39.75
981	NASDAQ	ATRA	Fri, Sep 7, 2018	38.35	40.65	38.00	39.75
980	NASDAQ	ATRA	Thu, Sep 6, 2018	40.05	40.55	38.05	38.40
979	NASDAQ	ATRA	Wed, Sep 5, 2018	39.70	40.20	38.75	40.05
978	NASDAQ	ATRA	Tue, Sep 4, 2018	40.85	41.00	38.35	39.85
977	NASDAQ	ATRA	Fri, Aug 31, 2018	40.50	41.85	40.25	40.95
976	NASDAQ	ATRA	Thu, Aug 30, 2018	40.05	41.23	39.75	40.45
975	NASDAQ	ATRA	Wed, Aug 29, 2018	40.00	40.50	39.75	40.00
974	NASDAQ	ATRA	Tue, Aug 28, 2018	40.50	41.20	39.75	39.90
973	NASDAQ	ATRA	Mon, Aug 27, 2018	38.00	40.90	38.00	40.30
972	NASDAQ	ATRA	Fri, Aug 24, 2018	38.15	38.45	37.10	37.60
971	NASDAQ	ATRA	Thu, Aug 23, 2018	37.95	38.75	36.65	38.10
970	NASDAQ	ATRA	Wed, Aug 22, 2018	37.00	38.30	36.45	37.98
969	NASDAQ	ATRA	Tue, Aug 21, 2018	36.05	37.15	36.05	36.95
968	NASDAQ	ATRA	Mon, Aug 20, 2018	36.30	36.55	35.50	36.15
967	NASDAQ	ATRA	Fri, Aug 17, 2018	35.05	36.35	33.55	35.90
966	NASDAQ	ATRA	Thu, Aug 16, 2018	36.00	36.05	35.00	35.05
965	NASDAQ	ATRA	Wed, Aug 15, 2018	38.35	38.35	35.05	35.90
964	NASDAQ	ATRA	Tue, Aug 14, 2018	38.00	39.25	37.70	38.50
963	NASDAQ	ATRA	Mon, Aug 13, 2018	38.05	38.60	37.05	37.80
962	NASDAQ	ATRA	Fri, Aug 10, 2018	37.35	38.78	37.25	38.10
961	NASDAQ	ATRA	Thu, Aug 9, 2018	36.75	38.55	36.25	37.45
960	NASDAQ	ATRA	Wed, Aug 8, 2018	37.95	38.32	36.55	36.90
959	NASDAQ	ATRA	Tue, Aug 7, 2018	38.05	38.35	36.70	37.80
958	NASDAQ	ATRA	Mon, Aug 6, 2018	36.75	38.00	36.40	37.75
957	NASDAQ	ATRA	Fri, Aug 3, 2018	36.90	37.05	35.65	36.70
956	NASDAQ	ATRA	Thu, Aug 2, 2018	36.55	37.00	34.00	36.75
955	NASDAQ	ATRA	Wed, Aug 1, 2018	37.15	41.05	36.30	37.30
954	NASDAQ	ATRA	Tue, Jul 31, 2018	36.15	37.60	35.70	37.55
953	NASDAQ	ATRA	Mon, Jul 30, 2018	36.70	36.75	35.00	35.85
952	NASDAQ	ATRA	Fri, Jul 27, 2018	38.11	39.00	35.75	36.80
951	NASDAQ	ATRA	Thu, Jul 26, 2018	38.55	39.55	37.90	38.95
950	NASDAQ	ATRA	Wed, Jul 25, 2018	38.90	39.85	38.45	38.70
949	NASDAQ	ATRA	Tue, Jul 24, 2018	40.10	40.60	37.60	38.75
948	NASDAQ	ATRA	Mon, Jul 23, 2018	39.10	40.50	38.09	40.15
947	NASDAQ	ATRA	Fri, Jul 20, 2018	39.35	39.83	38.65	39.20
946	NASDAQ	ATRA	Thu, Jul 19, 2018	39.60	40.00	39.05	39.30
945	NASDAQ	ATRA	Wed, Jul 18, 2018	40.45	40.65	39.10	39.85
944	NASDAQ	ATRA	Tue, Jul 17, 2018	38.45	40.90	38.20	40.50
943	NASDAQ	ATRA	Mon, Jul 16, 2018	39.75	39.85	38.20	38.50
942	NASDAQ	ATRA	Fri, Jul 13, 2018	41.65	42.05	39.05	39.95
941	NASDAQ	ATRA	Thu, Jul 12, 2018	40.90	42.00	40.90	41.70
940	NASDAQ	ATRA	Wed, Jul 11, 2018	39.50	40.90	39.50	40.65
939	NASDAQ	ATRA	Tue, Jul 10, 2018	40.85	41.35	39.30	40.25
938	NASDAQ	ATRA	Mon, Jul 9, 2018	40.70	41.35	39.45	40.60
937	NASDAQ	ATRA	Fri, Jul 6, 2018	39.95	41.25	39.75	40.65
936	NASDAQ	ATRA	Thu, Jul 5, 2018	39.35	40.15	38.85	39.60
935	NASDAQ	ATRA	Tue, Jul 3, 2018	38.75	39.65	37.25	39.15
934	NASDAQ	ATRA	Mon, Jul 2, 2018	36.20	38.60	35.72	38.25
933	NASDAQ	ATRA	Fri, Jun 29, 2018	36.35	37.17	35.55	36.75
932	NASDAQ	ATRA	Thu, Jun 28, 2018	35.45	37.38	35.25	36.15
931	NASDAQ	ATRA	Wed, Jun 27, 2018	39.75	39.95	36.75	36.75
930	NASDAQ	ATRA	Tue, Jun 26, 2018	41.30	41.95	39.26	39.85
929	NASDAQ	ATRA	Mon, Jun 25, 2018	42.05	42.88	41.15	41.20
928	NASDAQ	ATRA	Fri, Jun 22, 2018	46.05	46.15	41.15	42.25
927	NASDAQ	ATRA	Thu, Jun 21, 2018	47.10	47.10	45.41	46.05
926	NASDAQ	ATRA	Wed, Jun 20, 2018	44.80	47.22	44.50	46.90
925	NASDAQ	ATRA	Tue, Jun 19, 2018	45.65	45.85	44.30	44.50
924	NASDAQ	ATRA	Mon, Jun 18, 2018	44.50	45.85	44.10	45.20
923	NASDAQ	ATRA	Fri, Jun 15, 2018	45.50	46.20	44.30	45.05
922	NASDAQ	ATRA	Thu, Jun 14, 2018	45.35	45.80	44.30	45.65
921	NASDAQ	ATRA	Wed, Jun 13, 2018	44.35	45.60	43.20	45.10
920	NASDAQ	ATRA	Tue, Jun 12, 2018	42.85	44.50	42.85	43.95
919	NASDAQ	ATRA	Mon, Jun 11, 2018	44.80	44.80	42.35	42.85
918	NASDAQ	ATRA	Fri, Jun 8, 2018	41.95	45.05	41.35	45.00
917	NASDAQ	ATRA	Thu, Jun 7, 2018	46.20	46.45	42.15	42.30
916	NASDAQ	ATRA	Wed, Jun 6, 2018	49.85	49.85	46.05	46.15
915	NASDAQ	ATRA	Tue, Jun 5, 2018	48.85	50.90	48.75	49.05
914	NASDAQ	ATRA	Mon, Jun 4, 2018	50.30	50.78	48.05	48.95
913	NASDAQ	ATRA	Fri, Jun 1, 2018	50.25	51.40	49.30	49.95
912	NASDAQ	ATRA	Thu, May 31, 2018	49.70	50.90	49.05	49.80
911	NASDAQ	ATRA	Wed, May 30, 2018	49.25	50.80	48.60	49.45
910	NASDAQ	ATRA	Tue, May 29, 2018	49.90	50.45	47.75	48.75
909	NASDAQ	ATRA	Fri, May 25, 2018	51.20	52.75	50.10	50.20
908	NASDAQ	ATRA	Thu, May 24, 2018	49.60	51.35	49.45	51.05
907	NASDAQ	ATRA	Wed, May 23, 2018	50.10	50.95	49.35	49.70
906	NASDAQ	ATRA	Tue, May 22, 2018	51.35	52.30	50.25	50.40
905	NASDAQ	ATRA	Mon, May 21, 2018	50.30	54.45	50.26	51.45
904	NASDAQ	ATRA	Fri, May 18, 2018	48.15	50.85	47.80	50.05
903	NASDAQ	ATRA	Thu, May 17, 2018	47.10	48.05	46.35	47.90
902	NASDAQ	ATRA	Wed, May 16, 2018	46.45	47.40	45.10	47.30
901	NASDAQ	ATRA	Tue, May 15, 2018	44.25	46.30	43.60	45.90
900	NASDAQ	ATRA	Mon, May 14, 2018	42.90	44.60	41.60	44.30
899	NASDAQ	ATRA	Fri, May 11, 2018	40.00	42.85	40.00	42.75
898	NASDAQ	ATRA	Thu, May 10, 2018	40.20	41.55	39.40	39.70
897	NASDAQ	ATRA	Wed, May 9, 2018	39.20	40.00	37.92	39.60
896	NASDAQ	ATRA	Tue, May 8, 2018	40.15	40.82	37.00	39.53
895	NASDAQ	ATRA	Mon, May 7, 2018	40.70	42.90	40.33	42.05
894	NASDAQ	ATRA	Fri, May 4, 2018	40.30	41.15	39.80	40.45
893	NASDAQ	ATRA	Thu, May 3, 2018	41.00	41.25	39.70	40.35
892	NASDAQ	ATRA	Wed, May 2, 2018	39.85	41.90	39.85	41.20
891	NASDAQ	ATRA	Tue, May 1, 2018	40.40	41.45	39.50	40.05
890	NASDAQ	ATRA	Mon, Apr 30, 2018	42.10	42.75	40.30	40.35
889	NASDAQ	ATRA	Fri, Apr 27, 2018	42.90	44.55	41.95	42.00
888	NASDAQ	ATRA	Thu, Apr 26, 2018	40.70	42.83	40.37	42.50
887	NASDAQ	ATRA	Wed, Apr 25, 2018	40.10	40.75	38.60	40.70
886	NASDAQ	ATRA	Tue, Apr 24, 2018	40.20	40.95	39.10	39.80
885	NASDAQ	ATRA	Mon, Apr 23, 2018	39.65	40.35	39.00	40.15
884	NASDAQ	ATRA	Fri, Apr 20, 2018	39.10	40.10	38.80	39.50
883	NASDAQ	ATRA	Thu, Apr 19, 2018	41.00	41.85	39.10	39.40
882	NASDAQ	ATRA	Wed, Apr 18, 2018	41.40	42.85	40.93	41.35
881	NASDAQ	ATRA	Tue, Apr 17, 2018	39.40	42.30	39.15	41.20
880	NASDAQ	ATRA	Mon, Apr 16, 2018	41.05	41.60	38.00	39.30
879	NASDAQ	ATRA	Fri, Apr 13, 2018	42.00	42.00	39.80	40.60
878	NASDAQ	ATRA	Thu, Apr 12, 2018	42.00	44.20	41.06	42.20
877	NASDAQ	ATRA	Wed, Apr 11, 2018	39.45	41.60	38.24	41.35
876	NASDAQ	ATRA	Tue, Apr 10, 2018	37.65	40.35	37.25	39.95
875	NASDAQ	ATRA	Mon, Apr 9, 2018	35.70	37.30	35.35	36.00
874	NASDAQ	ATRA	Fri, Apr 6, 2018	35.80	36.65	34.90	35.15
873	NASDAQ	ATRA	Thu, Apr 5, 2018	37.85	38.00	36.05	36.45
872	NASDAQ	ATRA	Wed, Apr 4, 2018	35.75	37.65	35.15	37.35
871	NASDAQ	ATRA	Tue, Apr 3, 2018	37.50	38.00	35.45	36.25
870	NASDAQ	ATRA	Mon, Apr 2, 2018	39.00	39.85	36.85	36.90
869	NASDAQ	ATRA	Thu, Mar 29, 2018	38.50	40.40	37.41	39.00
868	NASDAQ	ATRA	Wed, Mar 28, 2018	38.40	38.50	36.10	38.05
867	NASDAQ	ATRA	Tue, Mar 27, 2018	41.10	41.10	35.70	38.50
866	NASDAQ	ATRA	Mon, Mar 26, 2018	40.55	41.50	38.90	41.15
865	NASDAQ	ATRA	Fri, Mar 23, 2018	38.75	40.78	38.20	39.65
864	NASDAQ	ATRA	Thu, Mar 22, 2018	38.80	39.85	38.25	38.45
863	NASDAQ	ATRA	Wed, Mar 21, 2018	40.85	41.10	39.00	39.70
862	NASDAQ	ATRA	Tue, Mar 20, 2018	38.85	41.20	38.25	40.80
861	NASDAQ	ATRA	Mon, Mar 19, 2018	42.20	43.10	38.15	38.68
860	NASDAQ	ATRA	Fri, Mar 16, 2018	41.85	43.50	40.90	41.90
859	NASDAQ	ATRA	Thu, Mar 15, 2018	42.60	43.55	41.45	41.90
858	NASDAQ	ATRA	Wed, Mar 14, 2018	41.55	42.20	40.25	42.00
857	NASDAQ	ATRA	Tue, Mar 13, 2018	46.15	46.90	41.00	41.25
856	NASDAQ	ATRA	Mon, Mar 12, 2018	44.55	47.20	44.20	46.05
855	NASDAQ	ATRA	Fri, Mar 9, 2018	44.65	45.05	43.01	44.15
854	NASDAQ	ATRA	Thu, Mar 8, 2018	42.10	44.00	42.05	44.00
853	NASDAQ	ATRA	Wed, Mar 7, 2018	42.65	44.05	41.55	42.25
852	NASDAQ	ATRA	Tue, Mar 6, 2018	43.50	44.45	42.75	43.45
851	NASDAQ	ATRA	Mon, Mar 5, 2018	39.40	44.80	39.40	42.95
850	NASDAQ	ATRA	Fri, Mar 2, 2018	36.65	39.95	36.25	39.40
849	NASDAQ	ATRA	Thu, Mar 1, 2018	36.70	37.65	34.75	37.20
848	NASDAQ	ATRA	Wed, Feb 28, 2018	39.30	41.55	38.20	38.53
847	NASDAQ	ATRA	Tue, Feb 27, 2018	43.30	45.40	42.20	42.55
846	NASDAQ	ATRA	Mon, Feb 26, 2018	44.55	45.00	42.80	43.10
845	NASDAQ	ATRA	Fri, Feb 23, 2018	43.20	44.05	40.55	44.00
844	NASDAQ	ATRA	Thu, Feb 22, 2018	43.90	46.10	42.01	42.90
843	NASDAQ	ATRA	Wed, Feb 21, 2018	44.15	45.30	42.90	43.65
842	NASDAQ	ATRA	Tue, Feb 20, 2018	45.10	46.15	43.40	44.80
841	NASDAQ	ATRA	Fri, Feb 16, 2018	46.50	49.25	43.95	45.40
840	NASDAQ	ATRA	Thu, Feb 15, 2018	42.85	48.90	42.60	47.05
839	NASDAQ	ATRA	Wed, Feb 14, 2018	44.60	49.90	43.55	48.35
838	NASDAQ	ATRA	Tue, Feb 13, 2018	39.25	45.20	38.25	45.05
837	NASDAQ	ATRA	Mon, Feb 12, 2018	41.95	44.00	37.01	39.48
836	NASDAQ	ATRA	Fri, Feb 9, 2018	37.40	41.85	35.85	41.70
835	NASDAQ	ATRA	Thu, Feb 8, 2018	37.70	38.00	36.55	36.70
834	NASDAQ	ATRA	Wed, Feb 7, 2018	35.90	37.65	35.60	37.30
833	NASDAQ	ATRA	Tue, Feb 6, 2018	31.90	35.90	31.65	35.80
832	NASDAQ	ATRA	Mon, Feb 5, 2018	33.00	35.50	32.55	32.88
831	NASDAQ	ATRA	Fri, Feb 2, 2018	35.55	35.60	31.00	33.05
830	NASDAQ	ATRA	Thu, Feb 1, 2018	37.75	37.80	34.50	35.95
829	NASDAQ	ATRA	Wed, Jan 31, 2018	40.15	40.20	36.35	37.80
828	NASDAQ	ATRA	Tue, Jan 30, 2018	36.90	40.75	36.06	40.25
827	NASDAQ	ATRA	Mon, Jan 29, 2018	36.90	39.65	35.65	37.25
826	NASDAQ	ATRA	Fri, Jan 26, 2018	35.75	37.45	34.70	37.25
825	NASDAQ	ATRA	Thu, Jan 25, 2018	33.60	34.80	32.60	34.55
824	NASDAQ	ATRA	Wed, Jan 24, 2018	35.30	36.10	32.45	33.25
823	NASDAQ	ATRA	Tue, Jan 23, 2018	33.45	36.95	33.35	35.45
822	NASDAQ	ATRA	Mon, Jan 22, 2018	29.75	34.75	29.75	33.35
821	NASDAQ	ATRA	Fri, Jan 19, 2018	29.85	29.90	28.30	29.50
820	NASDAQ	ATRA	Thu, Jan 18, 2018	28.20	28.45	27.30	27.50
819	NASDAQ	ATRA	Wed, Jan 17, 2018	28.50	29.50	28.05	28.25
818	NASDAQ	ATRA	Tue, Jan 16, 2018	28.10	30.90	27.30	27.55
817	NASDAQ	ATRA	Fri, Jan 12, 2018	22.15	30.40	22.15	28.25
816	NASDAQ	ATRA	Thu, Jan 11, 2018	20.70	22.20	20.50	22.15
815	NASDAQ	ATRA	Wed, Jan 10, 2018	19.45	20.75	19.10	20.70
814	NASDAQ	ATRA	Tue, Jan 9, 2018	18.55	19.70	18.30	19.35
813	NASDAQ	ATRA	Mon, Jan 8, 2018	18.55	18.68	17.75	18.55
812	NASDAQ	ATRA	Fri, Jan 5, 2018	17.80	18.60	17.80	18.50
811	NASDAQ	ATRA	Thu, Jan 4, 2018	19.00	19.10	17.20	18.00
810	NASDAQ	ATRA	Wed, Jan 3, 2018	18.00	19.53	16.60	19.25
809	NASDAQ	ATRA	Tue, Jan 2, 2018	17.95	18.45	17.00	18.10
808	NASDAQ	ATRA	Fri, Dec 29, 2017	16.25	21.80	15.90	18.10
807	NASDAQ	ATRA	Thu, Dec 28, 2017	15.35	15.50	14.81	15.25
806	NASDAQ	ATRA	Wed, Dec 27, 2017	15.35	15.70	15.00	15.25
805	NASDAQ	ATRA	Tue, Dec 26, 2017	15.60	15.73	15.20	15.30
804	NASDAQ	ATRA	Fri, Dec 22, 2017	15.45	15.90	15.35	15.60
803	NASDAQ	ATRA	Thu, Dec 21, 2017	15.35	15.65	15.05	15.45
802	NASDAQ	ATRA	Wed, Dec 20, 2017	15.10	15.48	15.00	15.35
801	NASDAQ	ATRA	Tue, Dec 19, 2017	14.80	15.50	14.75	15.00
800	NASDAQ	ATRA	Mon, Dec 18, 2017	14.65	14.80	14.50	14.70
799	NASDAQ	ATRA	Fri, Dec 15, 2017	14.60	14.80	14.50	14.55
798	NASDAQ	ATRA	Thu, Dec 14, 2017	14.75	14.85	14.31	14.55
797	NASDAQ	ATRA	Wed, Dec 13, 2017	14.60	15.05	14.50	14.70
796	NASDAQ	ATRA	Tue, Dec 12, 2017	14.55	14.78	14.40	14.60
795	NASDAQ	ATRA	Mon, Dec 11, 2017	15.00	15.00	14.35	14.50
794	NASDAQ	ATRA	Fri, Dec 8, 2017	13.85	14.80	13.85	14.80
793	NASDAQ	ATRA	Thu, Dec 7, 2017	13.50	14.00	13.40	13.70
792	NASDAQ	ATRA	Wed, Dec 6, 2017	14.30	14.40	13.20	13.60
791	NASDAQ	ATRA	Tue, Dec 5, 2017	14.75	14.95	14.15	14.15
790	NASDAQ	ATRA	Mon, Dec 4, 2017	14.65	14.95	14.40	14.60
789	NASDAQ	ATRA	Fri, Dec 1, 2017	14.50	14.80	14.10	14.60
788	NASDAQ	ATRA	Thu, Nov 30, 2017	14.25	14.70	14.10	14.45
787	NASDAQ	ATRA	Wed, Nov 29, 2017	14.15	14.75	13.80	14.10
786	NASDAQ	ATRA	Tue, Nov 28, 2017	14.15	14.40	13.81	14.25
785	NASDAQ	ATRA	Mon, Nov 27, 2017	14.40	14.70	14.15	14.20
784	NASDAQ	ATRA	Fri, Nov 24, 2017	14.55	14.75	14.20	14.50
783	NASDAQ	ATRA	Wed, Nov 22, 2017	14.45	14.60	14.15	14.35
782	NASDAQ	ATRA	Tue, Nov 21, 2017	14.75	15.05	14.45	14.50
781	NASDAQ	ATRA	Mon, Nov 20, 2017	14.65	14.80	14.15	14.65
780	NASDAQ	ATRA	Fri, Nov 17, 2017	14.55	15.05	14.10	14.60
779	NASDAQ	ATRA	Thu, Nov 16, 2017	14.20	14.55	14.00	14.50
778	NASDAQ	ATRA	Wed, Nov 15, 2017	13.55	14.15	13.25	14.00
777	NASDAQ	ATRA	Tue, Nov 14, 2017	13.55	13.80	13.15	13.65
776	NASDAQ	ATRA	Mon, Nov 13, 2017	13.30	14.20	13.00	13.55
775	NASDAQ	ATRA	Fri, Nov 10, 2017	13.10	13.75	12.65	13.45
774	NASDAQ	ATRA	Thu, Nov 9, 2017	14.20	14.50	13.20	13.20
773	NASDAQ	ATRA	Wed, Nov 8, 2017	15.05	15.20	14.25	14.35
772	NASDAQ	ATRA	Tue, Nov 7, 2017	16.15	16.20	15.10	15.10
771	NASDAQ	ATRA	Mon, Nov 6, 2017	15.65	16.40	15.60	16.15
770	NASDAQ	ATRA	Fri, Nov 3, 2017	14.40	15.60	14.25	15.55
769	NASDAQ	ATRA	Thu, Nov 2, 2017	14.05	14.45	13.57	14.25
768	NASDAQ	ATRA	Wed, Nov 1, 2017	14.40	14.78	13.80	14.10
767	NASDAQ	ATRA	Tue, Oct 31, 2017	14.25	14.63	14.00	14.20
766	NASDAQ	ATRA	Mon, Oct 30, 2017	13.45	14.85	13.45	14.15
765	NASDAQ	ATRA	Fri, Oct 27, 2017	13.55	13.90	13.40	13.60
764	NASDAQ	ATRA	Thu, Oct 26, 2017	14.15	14.30	13.30	13.55
763	NASDAQ	ATRA	Wed, Oct 25, 2017	14.95	15.01	14.15	14.20
762	NASDAQ	ATRA	Tue, Oct 24, 2017	14.60	15.15	14.40	15.00
761	NASDAQ	ATRA	Mon, Oct 23, 2017	14.55	15.24	14.43	14.60
760	NASDAQ	ATRA	Fri, Oct 20, 2017	14.40	14.65	14.20	14.60
759	NASDAQ	ATRA	Thu, Oct 19, 2017	14.10	14.62	13.95	14.35
758	NASDAQ	ATRA	Wed, Oct 18, 2017	14.75	14.75	14.15	14.30
757	NASDAQ	ATRA	Tue, Oct 17, 2017	14.55	14.85	14.45	14.55
756	NASDAQ	ATRA	Mon, Oct 16, 2017	14.35	15.15	14.35	14.55
755	NASDAQ	ATRA	Fri, Oct 13, 2017	14.90	14.90	14.30	14.50
754	NASDAQ	ATRA	Thu, Oct 12, 2017	15.05	15.20	14.55	14.80
753	NASDAQ	ATRA	Wed, Oct 11, 2017	15.30	15.50	15.05	15.15
752	NASDAQ	ATRA	Tue, Oct 10, 2017	15.50	15.55	14.95	15.20
751	NASDAQ	ATRA	Mon, Oct 9, 2017	16.10	16.18	15.30	15.40
750	NASDAQ	ATRA	Fri, Oct 6, 2017	16.75	16.90	15.90	16.20
749	NASDAQ	ATRA	Thu, Oct 5, 2017	17.10	17.45	16.60	16.95
748	NASDAQ	ATRA	Wed, Oct 4, 2017	16.60	17.30	16.45	16.95
747	NASDAQ	ATRA	Tue, Oct 3, 2017	17.45	17.45	16.60	16.65
746	NASDAQ	ATRA	Mon, Oct 2, 2017	16.70	17.30	16.30	17.30
745	NASDAQ	ATRA	Fri, Sep 29, 2017	16.40	16.60	16.00	16.55
744	NASDAQ	ATRA	Thu, Sep 28, 2017	17.00	17.20	16.10	16.20
743	NASDAQ	ATRA	Wed, Sep 27, 2017	16.90	17.40	16.45	17.05
742	NASDAQ	ATRA	Tue, Sep 26, 2017	16.00	16.85	15.85	16.75
741	NASDAQ	ATRA	Mon, Sep 25, 2017	15.55	16.15	15.55	15.95
740	NASDAQ	ATRA	Fri, Sep 22, 2017	15.60	15.83	15.20	15.65
739	NASDAQ	ATRA	Thu, Sep 21, 2017	15.60	16.10	15.45	15.55
738	NASDAQ	ATRA	Wed, Sep 20, 2017	15.75	15.80	15.25	15.60
737	NASDAQ	ATRA	Tue, Sep 19, 2017	15.60	15.70	15.35	15.65
736	NASDAQ	ATRA	Mon, Sep 18, 2017	15.65	16.15	15.40	15.50
735	NASDAQ	ATRA	Fri, Sep 15, 2017	15.30	15.75	14.75	15.65
734	NASDAQ	ATRA	Thu, Sep 14, 2017	15.40	15.81	15.25	15.45
733	NASDAQ	ATRA	Wed, Sep 13, 2017	15.00	15.61	14.85	15.40
732	NASDAQ	ATRA	Tue, Sep 12, 2017	14.75	15.30	14.55	15.15
731	NASDAQ	ATRA	Mon, Sep 11, 2017	15.00	15.40	14.30	14.60
730	NASDAQ	ATRA	Fri, Sep 8, 2017	15.00	15.25	14.73	14.80
729	NASDAQ	ATRA	Thu, Sep 7, 2017	15.05	15.31	14.55	15.05
728	NASDAQ	ATRA	Wed, Sep 6, 2017	15.15	15.45	14.80	15.10
727	NASDAQ	ATRA	Tue, Sep 5, 2017	15.25	15.40	14.73	15.05
726	NASDAQ	ATRA	Fri, Sep 1, 2017	15.80	15.80	14.75	15.25
725	NASDAQ	ATRA	Thu, Aug 31, 2017	14.80	15.95	14.70	15.75
724	NASDAQ	ATRA	Wed, Aug 30, 2017	15.00	15.15	14.55	14.70
723	NASDAQ	ATRA	Tue, Aug 29, 2017	14.40	15.21	14.24	15.00
722	NASDAQ	ATRA	Mon, Aug 28, 2017	14.00	14.95	13.85	14.50
721	NASDAQ	ATRA	Fri, Aug 25, 2017	14.00	14.30	13.70	13.85
720	NASDAQ	ATRA	Thu, Aug 24, 2017	13.55	14.15	13.45	13.80
719	NASDAQ	ATRA	Wed, Aug 23, 2017	13.40	13.90	13.25	13.50
718	NASDAQ	ATRA	Tue, Aug 22, 2017	13.25	13.90	13.20	13.65
717	NASDAQ	ATRA	Mon, Aug 21, 2017	13.30	13.85	13.00	13.25
716	NASDAQ	ATRA	Fri, Aug 18, 2017	13.50	13.70	13.15	13.35
715	NASDAQ	ATRA	Thu, Aug 17, 2017	14.30	14.57	13.60	13.65
714	NASDAQ	ATRA	Wed, Aug 16, 2017	14.30	14.90	14.05	14.35
713	NASDAQ	ATRA	Tue, Aug 15, 2017	14.75	15.05	14.15	14.25
712	NASDAQ	ATRA	Mon, Aug 14, 2017	14.85	15.00	14.60	14.95
711	NASDAQ	ATRA	Fri, Aug 11, 2017	14.60	14.80	14.30	14.75
710	NASDAQ	ATRA	Thu, Aug 10, 2017	14.40	15.30	14.31	14.50
709	NASDAQ	ATRA	Wed, Aug 9, 2017	14.55	14.90	14.35	14.50
708	NASDAQ	ATRA	Tue, Aug 8, 2017	15.60	15.60	14.63	14.80
707	NASDAQ	ATRA	Mon, Aug 7, 2017	15.30	15.65	15.25	15.55
706	NASDAQ	ATRA	Fri, Aug 4, 2017	14.90	15.35	14.80	15.30
705	NASDAQ	ATRA	Thu, Aug 3, 2017	14.75	15.17	14.68	14.90
704	NASDAQ	ATRA	Wed, Aug 2, 2017	14.75	15.00	14.55	14.75
703	NASDAQ	ATRA	Tue, Aug 1, 2017	15.35	15.35	14.40	14.75
702	NASDAQ	ATRA	Mon, Jul 31, 2017	14.95	15.45	14.72	15.25
701	NASDAQ	ATRA	Fri, Jul 28, 2017	15.10	15.25	14.65	15.00
700	NASDAQ	ATRA	Thu, Jul 27, 2017	15.55	15.98	15.05	15.20
699	NASDAQ	ATRA	Wed, Jul 26, 2017	15.90	15.90	15.40	15.45
698	NASDAQ	ATRA	Tue, Jul 25, 2017	16.95	17.00	15.65	15.85
697	NASDAQ	ATRA	Mon, Jul 24, 2017	16.00	17.55	15.85	16.80
696	NASDAQ	ATRA	Fri, Jul 21, 2017	15.95	16.15	15.15	16.00
695	NASDAQ	ATRA	Thu, Jul 20, 2017	15.95	16.30	15.80	15.90
694	NASDAQ	ATRA	Wed, Jul 19, 2017	16.00	16.30	15.68	15.95
693	NASDAQ	ATRA	Tue, Jul 18, 2017	15.70	16.05	15.45	15.85
692	NASDAQ	ATRA	Mon, Jul 17, 2017	15.05	16.10	14.80	15.75
691	NASDAQ	ATRA	Fri, Jul 14, 2017	14.90	15.40	14.85	15.05
690	NASDAQ	ATRA	Thu, Jul 13, 2017	14.65	14.95	14.30	14.90
689	NASDAQ	ATRA	Wed, Jul 12, 2017	14.40	14.75	14.25	14.55
688	NASDAQ	ATRA	Tue, Jul 11, 2017	14.65	14.65	14.08	14.20
687	NASDAQ	ATRA	Mon, Jul 10, 2017	14.90	14.90	14.25	14.55
686	NASDAQ	ATRA	Fri, Jul 7, 2017	14.90	15.00	14.05	14.90
685	NASDAQ	ATRA	Thu, Jul 6, 2017	15.10	15.20	14.65	14.75
684	NASDAQ	ATRA	Wed, Jul 5, 2017	14.40	15.50	14.15	15.25
683	NASDAQ	ATRA	Mon, Jul 3, 2017	14.05	14.40	13.75	14.40
682	NASDAQ	ATRA	Fri, Jun 30, 2017	14.60	14.65	13.90	14.00
681	NASDAQ	ATRA	Thu, Jun 29, 2017	14.40	14.70	14.20	14.60
680	NASDAQ	ATRA	Wed, Jun 28, 2017	14.00	14.75	13.75	14.40
679	NASDAQ	ATRA	Tue, Jun 27, 2017	14.95	15.15	13.90	14.00
678	NASDAQ	ATRA	Mon, Jun 26, 2017	14.60	14.95	14.15	14.95
677	NASDAQ	ATRA	Fri, Jun 23, 2017	14.65	14.75	13.85	14.50
676	NASDAQ	ATRA	Thu, Jun 22, 2017	14.65	15.45	14.40	14.75
675	NASDAQ	ATRA	Wed, Jun 21, 2017	13.60	14.43	13.50	14.35
674	NASDAQ	ATRA	Tue, Jun 20, 2017	13.45	13.85	13.30	13.50
673	NASDAQ	ATRA	Mon, Jun 19, 2017	12.80	13.95	12.75	13.45
672	NASDAQ	ATRA	Fri, Jun 16, 2017	12.20	13.40	12.15	12.75
671	NASDAQ	ATRA	Thu, Jun 15, 2017	12.65	12.90	11.80	12.30
670	NASDAQ	ATRA	Wed, Jun 14, 2017	13.45	13.80	12.75	12.80
669	NASDAQ	ATRA	Tue, Jun 13, 2017	13.15	13.65	12.95	13.45
668	NASDAQ	ATRA	Mon, Jun 12, 2017	12.80	13.55	12.80	13.10
667	NASDAQ	ATRA	Fri, Jun 9, 2017	13.15	13.50	12.80	12.85
666	NASDAQ	ATRA	Thu, Jun 8, 2017	13.45	13.75	13.10	13.20
665	NASDAQ	ATRA	Wed, Jun 7, 2017	13.15	13.55	13.10	13.45
664	NASDAQ	ATRA	Tue, Jun 6, 2017	13.05	13.45	12.80	13.15
663	NASDAQ	ATRA	Mon, Jun 5, 2017	14.25	14.25	13.05	13.10
662	NASDAQ	ATRA	Fri, Jun 2, 2017	14.15	14.75	13.90	14.15
661	NASDAQ	ATRA	Thu, Jun 1, 2017	13.50	14.10	13.25	13.90
660	NASDAQ	ATRA	Wed, May 31, 2017	13.30	13.60	12.70	13.25
659	NASDAQ	ATRA	Tue, May 30, 2017	14.15	14.45	13.08	13.25
658	NASDAQ	ATRA	Fri, May 26, 2017	14.35	14.35	14.00	14.25
657	NASDAQ	ATRA	Thu, May 25, 2017	13.70	14.60	13.70	14.40
656	NASDAQ	ATRA	Wed, May 24, 2017	15.35	15.45	14.34	14.50
655	NASDAQ	ATRA	Tue, May 23, 2017	15.20	15.50	14.80	15.35
654	NASDAQ	ATRA	Mon, May 22, 2017	15.15	15.40	14.70	15.20
653	NASDAQ	ATRA	Fri, May 19, 2017	15.10	15.60	14.90	15.15
652	NASDAQ	ATRA	Thu, May 18, 2017	14.90	15.20	14.65	15.10
651	NASDAQ	ATRA	Wed, May 17, 2017	14.95	15.85	14.60	14.80
650	NASDAQ	ATRA	Tue, May 16, 2017	15.25	15.30	14.95	15.25
649	NASDAQ	ATRA	Mon, May 15, 2017	15.15	15.60	14.65	15.35
648	NASDAQ	ATRA	Fri, May 12, 2017	15.20	15.80	14.70	15.25
647	NASDAQ	ATRA	Thu, May 11, 2017	14.25	15.40	13.75	15.25
646	NASDAQ	ATRA	Wed, May 10, 2017	14.65	14.73	14.10	14.30
645	NASDAQ	ATRA	Tue, May 9, 2017	14.30	14.70	14.00	14.65
644	NASDAQ	ATRA	Mon, May 8, 2017	14.75	14.80	14.10	14.25
643	NASDAQ	ATRA	Fri, May 5, 2017	15.85	16.50	14.05	14.95
642	NASDAQ	ATRA	Thu, May 4, 2017	15.85	16.20	15.40	15.95
641	NASDAQ	ATRA	Wed, May 3, 2017	16.45	16.90	15.65	15.75
640	NASDAQ	ATRA	Tue, May 2, 2017	16.95	16.95	15.75	16.60
639	NASDAQ	ATRA	Mon, May 1, 2017	17.10	17.35	16.75	16.85
638	NASDAQ	ATRA	Fri, Apr 28, 2017	17.40	17.60	16.60	17.10
637	NASDAQ	ATRA	Thu, Apr 27, 2017	17.90	17.90	17.25	17.35
636	NASDAQ	ATRA	Wed, Apr 26, 2017	17.50	18.15	16.85	17.85
635	NASDAQ	ATRA	Tue, Apr 25, 2017	16.10	18.15	16.03	17.55
634	NASDAQ	ATRA	Mon, Apr 24, 2017	17.25	17.55	15.55	15.95
633	NASDAQ	ATRA	Fri, Apr 21, 2017	19.05	19.10	16.30	16.90
632	NASDAQ	ATRA	Thu, Apr 20, 2017	18.55	19.10	17.70	18.90
631	NASDAQ	ATRA	Wed, Apr 19, 2017	18.30	18.65	18.15	18.45
630	NASDAQ	ATRA	Tue, Apr 18, 2017	17.55	18.25	17.40	18.20
629	NASDAQ	ATRA	Mon, Apr 17, 2017	17.25	18.00	17.00	17.70
628	NASDAQ	ATRA	Thu, Apr 13, 2017	17.45	17.63	17.05	17.30
627	NASDAQ	ATRA	Wed, Apr 12, 2017	16.95	17.57	16.85	17.50
626	NASDAQ	ATRA	Tue, Apr 11, 2017	16.90	17.35	16.50	17.00
625	NASDAQ	ATRA	Mon, Apr 10, 2017	17.20	17.65	16.68	16.90
624	NASDAQ	ATRA	Fri, Apr 7, 2017	18.30	18.30	17.00	17.10
623	NASDAQ	ATRA	Thu, Apr 6, 2017	20.15	20.25	18.05	18.50
622	NASDAQ	ATRA	Wed, Apr 5, 2017	19.95	20.90	19.65	20.05
621	NASDAQ	ATRA	Tue, Apr 4, 2017	20.45	20.75	19.75	19.85
620	NASDAQ	ATRA	Mon, Apr 3, 2017	20.50	21.20	20.30	20.40
619	NASDAQ	ATRA	Fri, Mar 31, 2017	20.10	20.60	19.60	20.55
618	NASDAQ	ATRA	Thu, Mar 30, 2017	19.00	20.35	18.95	20.15
617	NASDAQ	ATRA	Wed, Mar 29, 2017	18.60	19.85	18.60	19.05
616	NASDAQ	ATRA	Tue, Mar 28, 2017	20.40	20.73	18.45	18.55
615	NASDAQ	ATRA	Mon, Mar 27, 2017	20.50	20.80	20.00	20.40
614	NASDAQ	ATRA	Fri, Mar 24, 2017	21.20	21.35	20.70	20.75
613	NASDAQ	ATRA	Thu, Mar 23, 2017	21.45	21.45	20.69	21.00
612	NASDAQ	ATRA	Wed, Mar 22, 2017	20.20	21.55	20.00	21.50
611	NASDAQ	ATRA	Tue, Mar 21, 2017	21.40	22.05	20.20	20.20
610	NASDAQ	ATRA	Mon, Mar 20, 2017	19.85	21.40	19.75	21.25
609	NASDAQ	ATRA	Fri, Mar 17, 2017	18.30	20.20	18.10	20.05
608	NASDAQ	ATRA	Thu, Mar 16, 2017	18.70	19.11	18.25	18.65
607	NASDAQ	ATRA	Wed, Mar 15, 2017	19.60	19.90	18.80	18.85
606	NASDAQ	ATRA	Tue, Mar 14, 2017	22.30	22.35	19.75	20.20
605	NASDAQ	ATRA	Mon, Mar 13, 2017	21.00	23.00	20.55	22.70
604	NASDAQ	ATRA	Fri, Mar 10, 2017	19.15	21.25	18.75	21.00
603	NASDAQ	ATRA	Thu, Mar 9, 2017	17.40	19.68	17.40	18.75
602	NASDAQ	ATRA	Wed, Mar 8, 2017	16.95	17.80	16.70	17.30
601	NASDAQ	ATRA	Tue, Mar 7, 2017	17.00	17.30	16.50	16.85
600	NASDAQ	ATRA	Mon, Mar 6, 2017	17.10	17.55	16.60	17.40
599	NASDAQ	ATRA	Fri, Mar 3, 2017	16.95	17.40	16.85	17.15
598	NASDAQ	ATRA	Thu, Mar 2, 2017	16.40	17.35	16.25	16.90
597	NASDAQ	ATRA	Wed, Mar 1, 2017	15.80	16.80	15.50	16.50
596	NASDAQ	ATRA	Tue, Feb 28, 2017	15.95	16.43	15.30	15.45
595	NASDAQ	ATRA	Mon, Feb 27, 2017	13.70	16.20	13.65	16.20
594	NASDAQ	ATRA	Fri, Feb 24, 2017	14.60	14.90	13.60	13.80
593	NASDAQ	ATRA	Thu, Feb 23, 2017	15.00	15.15	14.32	14.80
592	NASDAQ	ATRA	Wed, Feb 22, 2017	15.50	15.70	14.90	14.90
591	NASDAQ	ATRA	Tue, Feb 21, 2017	15.65	15.85	14.90	15.55
590	NASDAQ	ATRA	Fri, Feb 17, 2017	15.50	15.78	15.20	15.60
589	NASDAQ	ATRA	Thu, Feb 16, 2017	16.10	16.40	15.35	15.60
588	NASDAQ	ATRA	Wed, Feb 15, 2017	15.65	16.10	15.30	16.10
587	NASDAQ	ATRA	Tue, Feb 14, 2017	15.05	15.81	14.90	15.75
586	NASDAQ	ATRA	Mon, Feb 13, 2017	15.20	15.55	14.90	15.15
585	NASDAQ	ATRA	Fri, Feb 10, 2017	16.10	16.25	15.00	15.05
584	NASDAQ	ATRA	Thu, Feb 9, 2017	15.95	16.20	15.10	16.10
583	NASDAQ	ATRA	Wed, Feb 8, 2017	14.85	16.10	14.75	16.00
582	NASDAQ	ATRA	Tue, Feb 7, 2017	15.15	15.55	14.70	15.05
581	NASDAQ	ATRA	Mon, Feb 6, 2017	14.15	15.30	14.05	15.05
580	NASDAQ	ATRA	Fri, Feb 3, 2017	13.65	14.28	13.35	14.20
579	NASDAQ	ATRA	Thu, Feb 2, 2017	13.70	13.75	13.20	13.55
578	NASDAQ	ATRA	Wed, Feb 1, 2017	13.55	13.95	13.10	13.75
577	NASDAQ	ATRA	Tue, Jan 31, 2017	12.65	13.70	12.45	13.45
576	NASDAQ	ATRA	Mon, Jan 30, 2017	13.40	13.40	12.55	12.65
575	NASDAQ	ATRA	Fri, Jan 27, 2017	13.70	13.85	13.15	13.45
574	NASDAQ	ATRA	Thu, Jan 26, 2017	14.05	14.20	13.55	13.60
573	NASDAQ	ATRA	Wed, Jan 25, 2017	14.00	14.11	13.77	14.05
572	NASDAQ	ATRA	Tue, Jan 24, 2017	13.60	13.90	13.40	13.75
571	NASDAQ	ATRA	Mon, Jan 23, 2017	13.85	14.00	13.10	13.55
570	NASDAQ	ATRA	Fri, Jan 20, 2017	14.15	14.30	13.80	13.90
569	NASDAQ	ATRA	Thu, Jan 19, 2017	14.70	14.85	14.10	14.10
568	NASDAQ	ATRA	Wed, Jan 18, 2017	14.15	14.80	14.10	14.70
567	NASDAQ	ATRA	Tue, Jan 17, 2017	14.55	14.75	13.93	14.00
566	NASDAQ	ATRA	Fri, Jan 13, 2017	15.15	15.85	14.65	14.80
565	NASDAQ	ATRA	Thu, Jan 12, 2017	15.10	15.55	14.70	15.10
564	NASDAQ	ATRA	Wed, Jan 11, 2017	16.65	16.65	15.20	15.30
563	NASDAQ	ATRA	Tue, Jan 10, 2017	16.55	16.80	16.20	16.60
562	NASDAQ	ATRA	Mon, Jan 9, 2017	17.15	17.15	16.00	16.40
561	NASDAQ	ATRA	Fri, Jan 6, 2017	16.40	17.80	16.40	16.80
560	NASDAQ	ATRA	Thu, Jan 5, 2017	15.80	16.70	15.68	16.30
559	NASDAQ	ATRA	Wed, Jan 4, 2017	15.05	16.25	15.05	15.75
558	NASDAQ	ATRA	Tue, Jan 3, 2017	14.45	15.10	14.20	15.08
557	NASDAQ	ATRA	Fri, Dec 30, 2016	14.45	14.60	14.05	14.20
556	NASDAQ	ATRA	Thu, Dec 29, 2016	14.85	14.85	13.80	14.30
555	NASDAQ	ATRA	Wed, Dec 28, 2016	15.15	15.15	14.60	14.70
554	NASDAQ	ATRA	Tue, Dec 27, 2016	15.60	16.00	15.10	15.15
553	NASDAQ	ATRA	Fri, Dec 23, 2016	14.60	15.70	14.60	15.65
552	NASDAQ	ATRA	Thu, Dec 22, 2016	15.60	15.95	14.50	14.50
551	NASDAQ	ATRA	Wed, Dec 21, 2016	16.30	16.95	15.30	15.50
550	NASDAQ	ATRA	Tue, Dec 20, 2016	16.85	17.05	16.05	16.35
549	NASDAQ	ATRA	Mon, Dec 19, 2016	16.20	17.30	16.20	16.65
548	NASDAQ	ATRA	Fri, Dec 16, 2016	15.85	16.30	15.60	15.85
547	NASDAQ	ATRA	Thu, Dec 15, 2016	15.40	16.20	15.30	15.90
546	NASDAQ	ATRA	Wed, Dec 14, 2016	17.85	17.85	15.36	15.70
545	NASDAQ	ATRA	Tue, Dec 13, 2016	17.05	18.70	16.95	18.05
544	NASDAQ	ATRA	Mon, Dec 12, 2016	16.80	17.60	16.65	16.95
543	NASDAQ	ATRA	Fri, Dec 9, 2016	16.25	18.10	16.25	16.90
542	NASDAQ	ATRA	Thu, Dec 8, 2016	17.20	17.75	15.85	16.60
541	NASDAQ	ATRA	Wed, Dec 7, 2016	18.45	18.75	17.05	17.30
540	NASDAQ	ATRA	Tue, Dec 6, 2016	19.50	19.50	18.25	18.65
539	NASDAQ	ATRA	Mon, Dec 5, 2016	19.15	19.70	18.50	19.40
538	NASDAQ	ATRA	Fri, Dec 2, 2016	19.05	19.40	18.55	18.90
537	NASDAQ	ATRA	Thu, Dec 1, 2016	19.70	20.65	19.00	19.20
536	NASDAQ	ATRA	Wed, Nov 30, 2016	20.55	21.30	19.50	19.85
535	NASDAQ	ATRA	Tue, Nov 29, 2016	19.95	20.65	19.35	20.55
534	NASDAQ	ATRA	Mon, Nov 28, 2016	19.80	20.45	19.05	19.90
533	NASDAQ	ATRA	Fri, Nov 25, 2016	19.45	20.20	18.90	19.80
532	NASDAQ	ATRA	Wed, Nov 23, 2016	17.80	19.58	17.50	19.45
531	NASDAQ	ATRA	Tue, Nov 22, 2016	18.80	19.07	17.80	18.30
530	NASDAQ	ATRA	Mon, Nov 21, 2016	17.85	18.80	17.85	18.60
529	NASDAQ	ATRA	Fri, Nov 18, 2016	18.40	18.70	17.65	18.05
528	NASDAQ	ATRA	Thu, Nov 17, 2016	18.70	18.90	17.80	18.35
527	NASDAQ	ATRA	Wed, Nov 16, 2016	19.35	19.65	18.40	18.50
526	NASDAQ	ATRA	Tue, Nov 15, 2016	20.65	20.65	19.25	19.30
525	NASDAQ	ATRA	Mon, Nov 14, 2016	20.15	21.05	20.15	20.80
524	NASDAQ	ATRA	Fri, Nov 11, 2016	19.40	20.20	18.80	20.15
523	NASDAQ	ATRA	Thu, Nov 10, 2016	20.90	21.85	19.30	19.40
522	NASDAQ	ATRA	Wed, Nov 9, 2016	17.60	20.90	17.09	20.75
521	NASDAQ	ATRA	Tue, Nov 8, 2016	16.65	17.75	16.35	17.60
520	NASDAQ	ATRA	Mon, Nov 7, 2016	15.50	16.85	15.15	16.70
519	NASDAQ	ATRA	Fri, Nov 4, 2016	13.75	15.25	13.35	15.15
518	NASDAQ	ATRA	Thu, Nov 3, 2016	14.10	14.45	13.70	14.25
517	NASDAQ	ATRA	Wed, Nov 2, 2016	13.60	14.15	13.10	14.05
516	NASDAQ	ATRA	Tue, Nov 1, 2016	12.60	13.75	12.45	13.60
515	NASDAQ	ATRA	Mon, Oct 31, 2016	13.65	13.65	12.71	12.80
514	NASDAQ	ATRA	Fri, Oct 28, 2016	13.50	14.10	13.20	13.60
513	NASDAQ	ATRA	Thu, Oct 27, 2016	14.25	14.50	13.40	13.60
512	NASDAQ	ATRA	Wed, Oct 26, 2016	14.15	14.15	13.78	14.00
511	NASDAQ	ATRA	Tue, Oct 25, 2016	14.55	14.75	14.00	14.10
510	NASDAQ	ATRA	Mon, Oct 24, 2016	15.15	15.55	14.50	14.50
509	NASDAQ	ATRA	Fri, Oct 21, 2016	15.10	15.23	14.60	14.90
508	NASDAQ	ATRA	Thu, Oct 20, 2016	15.00	15.50	15.00	15.15
507	NASDAQ	ATRA	Wed, Oct 19, 2016	15.85	16.45	14.90	15.05
506	NASDAQ	ATRA	Tue, Oct 18, 2016	16.50	16.60	15.70	15.75
505	NASDAQ	ATRA	Mon, Oct 17, 2016	16.00	16.30	15.49	16.15
504	NASDAQ	ATRA	Fri, Oct 14, 2016	15.95	16.95	15.65	16.05
503	NASDAQ	ATRA	Thu, Oct 13, 2016	16.10	16.50	15.65	15.75
502	NASDAQ	ATRA	Wed, Oct 12, 2016	18.15	18.30	16.25	16.35
501	NASDAQ	ATRA	Tue, Oct 11, 2016	18.60	18.80	17.95	18.10
500	NASDAQ	ATRA	Mon, Oct 10, 2016	17.40	18.80	17.25	18.50
499	NASDAQ	ATRA	Fri, Oct 7, 2016	17.59	17.96	17.14	17.32
498	NASDAQ	ATRA	Thu, Oct 6, 2016	18.23	19.41	17.49	17.62
497	NASDAQ	ATRA	Wed, Oct 5, 2016	19.20	19.27	18.35	18.49
496	NASDAQ	ATRA	Tue, Oct 4, 2016	20.46	20.46	19.00	19.08
495	NASDAQ	ATRA	Mon, Oct 3, 2016	21.22	21.69	20.11	20.46
494	NASDAQ	ATRA	Fri, Sep 30, 2016	20.85	21.82	20.58	21.39
493	NASDAQ	ATRA	Thu, Sep 29, 2016	21.77	21.79	20.62	20.66
492	NASDAQ	ATRA	Wed, Sep 28, 2016	20.81	21.98	20.81	21.81
491	NASDAQ	ATRA	Tue, Sep 27, 2016	19.94	20.94	19.81	20.81
490	NASDAQ	ATRA	Mon, Sep 26, 2016	19.91	20.44	19.37	19.94
489	NASDAQ	ATRA	Fri, Sep 23, 2016	20.32	20.84	20.08	20.12
488	NASDAQ	ATRA	Thu, Sep 22, 2016	20.64	20.99	19.98	20.46
487	NASDAQ	ATRA	Wed, Sep 21, 2016	20.28	20.73	19.49	20.35
486	NASDAQ	ATRA	Tue, Sep 20, 2016	19.44	20.58	19.08	20.23
485	NASDAQ	ATRA	Mon, Sep 19, 2016	19.50	19.76	19.09	19.17
484	NASDAQ	ATRA	Fri, Sep 16, 2016	19.14	20.02	19.00	19.30
483	NASDAQ	ATRA	Thu, Sep 15, 2016	19.85	20.02	19.02	19.18
482	NASDAQ	ATRA	Wed, Sep 14, 2016	21.13	22.03	20.98	21.33
481	NASDAQ	ATRA	Tue, Sep 13, 2016	21.05	21.36	20.14	20.95
480	NASDAQ	ATRA	Mon, Sep 12, 2016	20.26	21.47	19.67	21.40
479	NASDAQ	ATRA	Fri, Sep 9, 2016	20.88	21.72	20.32	20.33
478	NASDAQ	ATRA	Thu, Sep 8, 2016	21.34	21.85	20.78	21.29
477	NASDAQ	ATRA	Wed, Sep 7, 2016	21.05	21.49	21.05	21.31
476	NASDAQ	ATRA	Tue, Sep 6, 2016	19.86	21.16	19.37	21.06
475	NASDAQ	ATRA	Fri, Sep 2, 2016	19.95	20.37	19.06	19.70
474	NASDAQ	ATRA	Thu, Sep 1, 2016	19.62	20.10	19.22	19.85
473	NASDAQ	ATRA	Wed, Aug 31, 2016	19.73	20.24	19.28	19.54
472	NASDAQ	ATRA	Tue, Aug 30, 2016	19.55	20.04	19.47	19.81
471	NASDAQ	ATRA	Mon, Aug 29, 2016	19.93	19.93	19.26	19.60
470	NASDAQ	ATRA	Fri, Aug 26, 2016	19.74	20.05	19.35	19.83
469	NASDAQ	ATRA	Thu, Aug 25, 2016	20.33	20.72	19.23	19.63
468	NASDAQ	ATRA	Wed, Aug 24, 2016	22.10	22.67	20.10	20.14
467	NASDAQ	ATRA	Tue, Aug 23, 2016	23.08	23.40	21.60	22.19
466	NASDAQ	ATRA	Mon, Aug 22, 2016	22.45	23.26	21.93	22.80
465	NASDAQ	ATRA	Fri, Aug 19, 2016	22.68	22.74	22.01	22.33
464	NASDAQ	ATRA	Thu, Aug 18, 2016	22.30	22.74	21.63	22.73
463	NASDAQ	ATRA	Wed, Aug 17, 2016	22.35	22.46	21.79	22.28
462	NASDAQ	ATRA	Tue, Aug 16, 2016	22.71	23.15	20.80	22.35
461	NASDAQ	ATRA	Mon, Aug 15, 2016	21.25	22.94	21.22	22.78
460	NASDAQ	ATRA	Fri, Aug 12, 2016	21.08	21.49	20.76	21.22
459	NASDAQ	ATRA	Thu, Aug 11, 2016	21.28	21.30	20.75	21.12
458	NASDAQ	ATRA	Wed, Aug 10, 2016	22.45	22.45	21.03	21.03
457	NASDAQ	ATRA	Tue, Aug 9, 2016	22.50	22.83	22.06	22.50
456	NASDAQ	ATRA	Mon, Aug 8, 2016	24.68	24.68	21.80	22.54
455	NASDAQ	ATRA	Fri, Aug 5, 2016	24.80	25.73	24.52	24.87
454	NASDAQ	ATRA	Thu, Aug 4, 2016	24.85	24.94	24.39	24.70
453	NASDAQ	ATRA	Wed, Aug 3, 2016	23.97	24.88	23.89	24.82
452	NASDAQ	ATRA	Tue, Aug 2, 2016	24.47	24.53	23.86	24.10
451	NASDAQ	ATRA	Mon, Aug 1, 2016	24.18	24.56	24.17	24.40
450	NASDAQ	ATRA	Fri, Jul 29, 2016	23.90	24.22	23.77	24.00
449	NASDAQ	ATRA	Thu, Jul 28, 2016	23.92	24.23	23.62	24.05
448	NASDAQ	ATRA	Wed, Jul 27, 2016	22.94	23.95	22.82	23.91
447	NASDAQ	ATRA	Tue, Jul 26, 2016	22.70	23.31	22.59	22.83
446	NASDAQ	ATRA	Mon, Jul 25, 2016	22.50	22.92	22.25	22.83
445	NASDAQ	ATRA	Fri, Jul 22, 2016	22.27	22.57	21.99	22.42
444	NASDAQ	ATRA	Thu, Jul 21, 2016	22.23	22.73	21.76	22.20
443	NASDAQ	ATRA	Wed, Jul 20, 2016	21.57	22.24	21.47	22.02
442	NASDAQ	ATRA	Tue, Jul 19, 2016	21.47	22.08	21.28	21.45
441	NASDAQ	ATRA	Mon, Jul 18, 2016	22.01	22.01	21.14	21.59
440	NASDAQ	ATRA	Fri, Jul 15, 2016	21.73	22.27	21.62	21.95
439	NASDAQ	ATRA	Thu, Jul 14, 2016	22.07	22.70	21.17	21.66
438	NASDAQ	ATRA	Wed, Jul 13, 2016	22.59	22.78	21.66	21.70
437	NASDAQ	ATRA	Tue, Jul 12, 2016	22.68	23.17	22.35	22.55
436	NASDAQ	ATRA	Mon, Jul 11, 2016	22.63	23.77	22.23	22.67
435	NASDAQ	ATRA	Fri, Jul 8, 2016	23.04	23.20	22.40	23.17
434	NASDAQ	ATRA	Thu, Jul 7, 2016	23.00	23.35	22.43	23.02
433	NASDAQ	ATRA	Wed, Jul 6, 2016	22.33	23.28	22.27	22.93
432	NASDAQ	ATRA	Tue, Jul 5, 2016	22.54	22.87	22.31	22.51
431	NASDAQ	ATRA	Fri, Jul 1, 2016	22.49	22.90	22.18	22.80
430	NASDAQ	ATRA	Thu, Jun 30, 2016	22.51	22.66	22.04	22.51
429	NASDAQ	ATRA	Wed, Jun 29, 2016	22.81	23.25	22.19	22.51
428	NASDAQ	ATRA	Tue, Jun 28, 2016	21.32	22.34	20.87	22.15
427	NASDAQ	ATRA	Mon, Jun 27, 2016	21.07	21.48	19.92	20.78
426	NASDAQ	ATRA	Fri, Jun 24, 2016	20.75	21.94	20.04	21.48
425	NASDAQ	ATRA	Thu, Jun 23, 2016	21.85	22.42	20.85	22.06
424	NASDAQ	ATRA	Wed, Jun 22, 2016	21.55	22.69	20.88	21.93
423	NASDAQ	ATRA	Tue, Jun 21, 2016	21.23	21.66	20.90	21.56
422	NASDAQ	ATRA	Mon, Jun 20, 2016	20.02	21.37	19.79	21.06
421	NASDAQ	ATRA	Fri, Jun 17, 2016	20.77	21.29	19.78	19.85
420	NASDAQ	ATRA	Thu, Jun 16, 2016	19.91	20.77	19.46	20.70
419	NASDAQ	ATRA	Wed, Jun 15, 2016	19.75	20.37	19.56	20.11
418	NASDAQ	ATRA	Tue, Jun 14, 2016	19.82	20.09	18.86	19.53
417	NASDAQ	ATRA	Mon, Jun 13, 2016	19.24	20.18	19.24	19.88
416	NASDAQ	ATRA	Fri, Jun 10, 2016	19.73	20.33	19.21	19.53
415	NASDAQ	ATRA	Thu, Jun 9, 2016	20.46	20.75	19.83	20.10
414	NASDAQ	ATRA	Wed, Jun 8, 2016	21.07	21.16	20.02	20.73
413	NASDAQ	ATRA	Tue, Jun 7, 2016	19.45	21.25	18.62	20.99
412	NASDAQ	ATRA	Mon, Jun 6, 2016	18.32	19.87	17.64	19.35
411	NASDAQ	ATRA	Fri, Jun 3, 2016	18.99	19.08	17.56	18.17
410	NASDAQ	ATRA	Thu, Jun 2, 2016	18.03	19.20	17.95	19.13
409	NASDAQ	ATRA	Wed, Jun 1, 2016	18.02	18.25	17.60	18.09
408	NASDAQ	ATRA	Tue, May 31, 2016	17.75	18.28	17.56	18.11
407	NASDAQ	ATRA	Fri, May 27, 2016	17.48	17.65	16.90	17.53
406	NASDAQ	ATRA	Thu, May 26, 2016	18.04	18.04	16.99	17.36
405	NASDAQ	ATRA	Wed, May 25, 2016	17.89	18.41	17.09	17.99
404	NASDAQ	ATRA	Tue, May 24, 2016	17.82	18.02	17.27	17.95
403	NASDAQ	ATRA	Mon, May 23, 2016	16.84	17.69	16.74	17.52
402	NASDAQ	ATRA	Fri, May 20, 2016	16.43	17.23	16.11	16.84
401	NASDAQ	ATRA	Thu, May 19, 2016	16.28	16.85	15.88	16.34
400	NASDAQ	ATRA	Wed, May 18, 2016	15.96	16.71	15.96	16.40
399	NASDAQ	ATRA	Tue, May 17, 2016	16.11	16.37	15.50	16.02
398	NASDAQ	ATRA	Mon, May 16, 2016	15.15	16.49	14.90	16.30
397	NASDAQ	ATRA	Fri, May 13, 2016	15.20	15.80	15.11	15.32
396	NASDAQ	ATRA	Thu, May 12, 2016	16.05	16.05	14.29	15.26
395	NASDAQ	ATRA	Wed, May 11, 2016	16.47	16.56	15.75	15.82
394	NASDAQ	ATRA	Tue, May 10, 2016	16.81	17.15	15.50	16.52
393	NASDAQ	ATRA	Mon, May 9, 2016	15.19	17.22	15.18	16.48
392	NASDAQ	ATRA	Fri, May 6, 2016	14.98	15.54	14.63	15.14
391	NASDAQ	ATRA	Thu, May 5, 2016	15.78	16.43	14.52	15.29
390	NASDAQ	ATRA	Wed, May 4, 2016	16.50	16.55	15.48	16.02
389	NASDAQ	ATRA	Tue, May 3, 2016	17.67	17.94	16.63	16.69
388	NASDAQ	ATRA	Mon, May 2, 2016	18.16	18.39	17.33	17.94
387	NASDAQ	ATRA	Fri, Apr 29, 2016	18.72	18.85	17.19	18.01
386	NASDAQ	ATRA	Thu, Apr 28, 2016	18.58	19.06	18.03	18.77
385	NASDAQ	ATRA	Wed, Apr 27, 2016	18.75	19.16	17.81	18.58
384	NASDAQ	ATRA	Tue, Apr 26, 2016	20.51	20.60	18.07	19.02
383	NASDAQ	ATRA	Mon, Apr 25, 2016	20.67	20.81	19.92	20.58
382	NASDAQ	ATRA	Fri, Apr 22, 2016	21.02	21.61	20.34	20.87
381	NASDAQ	ATRA	Thu, Apr 21, 2016	20.68	21.87	20.53	20.99
380	NASDAQ	ATRA	Wed, Apr 20, 2016	20.83	21.10	20.16	20.68
379	NASDAQ	ATRA	Tue, Apr 19, 2016	21.19	21.44	20.09	20.50
378	NASDAQ	ATRA	Mon, Apr 18, 2016	21.14	21.38	20.67	21.09
377	NASDAQ	ATRA	Fri, Apr 15, 2016	20.95	21.39	20.80	21.24
376	NASDAQ	ATRA	Thu, Apr 14, 2016	21.23	21.31	20.39	21.08
375	NASDAQ	ATRA	Wed, Apr 13, 2016	20.65	21.44	20.21	21.18
374	NASDAQ	ATRA	Tue, Apr 12, 2016	20.53	20.69	19.67	20.25
373	NASDAQ	ATRA	Mon, Apr 11, 2016	20.88	20.98	19.97	20.54
372	NASDAQ	ATRA	Fri, Apr 8, 2016	20.90	21.11	20.14	20.61
371	NASDAQ	ATRA	Thu, Apr 7, 2016	22.25	22.25	19.60	20.48
370	NASDAQ	ATRA	Wed, Apr 6, 2016	19.88	22.88	19.88	22.84
369	NASDAQ	ATRA	Tue, Apr 5, 2016	20.67	20.67	20.67	19.82
368	NASDAQ	ATRA	Mon, Apr 4, 2016	20.02	21.69	19.98	20.67
367	NASDAQ	ATRA	Fri, Apr 1, 2016	18.76	20.30	18.70	19.93
366	NASDAQ	ATRA	Thu, Mar 31, 2016	19.08	20.10	18.85	18.81
365	NASDAQ	ATRA	Wed, Mar 30, 2016	19.47	20.16	17.63	18.81
364	NASDAQ	ATRA	Tue, Mar 29, 2016	16.74	19.22	16.00	17.02
363	NASDAQ	ATRA	Mon, Mar 28, 2016	17.20	17.23	16.52	17.11
362	NASDAQ	ATRA	Thu, Mar 24, 2016	16.61	16.61	16.61	16.85
361	NASDAQ	ATRA	Wed, Mar 23, 2016	18.08	18.38	16.49	16.61
360	NASDAQ	ATRA	Tue, Mar 22, 2016	17.59	18.70	17.59	18.28
359	NASDAQ	ATRA	Mon, Mar 21, 2016	16.64	18.54	16.16	17.63
358	NASDAQ	ATRA	Fri, Mar 18, 2016	15.86	17.29	15.41	16.86
357	NASDAQ	ATRA	Thu, Mar 17, 2016	14.94	15.97	13.70	15.64
356	NASDAQ	ATRA	Wed, Mar 16, 2016	15.69	16.23	14.63	14.91
355	NASDAQ	ATRA	Tue, Mar 15, 2016	17.70	17.70	17.70	15.75
354	NASDAQ	ATRA	Mon, Mar 14, 2016	16.56	18.05	16.40	17.70
353	NASDAQ	ATRA	Fri, Mar 11, 2016	16.40	16.98	16.08	16.58
352	NASDAQ	ATRA	Thu, Mar 10, 2016	16.67	18.00	16.01	16.39
351	NASDAQ	ATRA	Wed, Mar 9, 2016	16.53	16.53	16.53	16.39
350	NASDAQ	ATRA	Tue, Mar 8, 2016	18.48	18.99	16.50	18.76
349	NASDAQ	ATRA	Mon, Mar 7, 2016	15.74	19.74	15.74	18.76
348	NASDAQ	ATRA	Fri, Mar 4, 2016	18.30	18.30	18.30	15.88
347	NASDAQ	ATRA	Thu, Mar 3, 2016	19.49	19.49	19.49	18.30
346	NASDAQ	ATRA	Wed, Mar 2, 2016	17.68	20.90	17.51	17.69
345	NASDAQ	ATRA	Tue, Mar 1, 2016	16.44	16.44	16.44	17.69
344	NASDAQ	ATRA	Mon, Feb 29, 2016	17.19	17.25	15.11	17.15
343	NASDAQ	ATRA	Fri, Feb 26, 2016	15.67	15.67	15.67	17.15
342	NASDAQ	ATRA	Thu, Feb 25, 2016	15.44	16.50	15.21	15.67
341	NASDAQ	ATRA	Wed, Feb 24, 2016	15.15	15.29	14.00	15.21
340	NASDAQ	ATRA	Tue, Feb 23, 2016	16.31	16.63	15.11	15.12
339	NASDAQ	ATRA	Mon, Feb 22, 2016	16.41	17.05	16.09	16.39
338	NASDAQ	ATRA	Fri, Feb 19, 2016	15.80	16.74	15.38	16.45
337	NASDAQ	ATRA	Thu, Feb 18, 2016	17.73	17.75	15.89	16.00
336	NASDAQ	ATRA	Wed, Feb 17, 2016	15.96	17.68	15.53	17.50
335	NASDAQ	ATRA	Tue, Feb 16, 2016	15.35	16.01	15.08	15.58
334	NASDAQ	ATRA	Fri, Feb 12, 2016	14.41	15.51	13.31	15.41
333	NASDAQ	ATRA	Thu, Feb 11, 2016	14.37	15.20	13.99	14.01
332	NASDAQ	ATRA	Wed, Feb 10, 2016	15.93	16.55	14.78	14.85
331	NASDAQ	ATRA	Tue, Feb 9, 2016	15.27	16.61	14.78	15.78
330	NASDAQ	ATRA	Mon, Feb 8, 2016	16.85	17.01	15.41	15.69
329	NASDAQ	ATRA	Fri, Feb 5, 2016	18.65	19.60	16.95	17.16
328	NASDAQ	ATRA	Thu, Feb 4, 2016	17.72	19.92	17.72	18.84
327	NASDAQ	ATRA	Wed, Feb 3, 2016	18.20	18.34	16.23	17.86
326	NASDAQ	ATRA	Tue, Feb 2, 2016	18.88	18.95	17.74	18.05
325	NASDAQ	ATRA	Mon, Feb 1, 2016	18.08	19.54	17.35	19.26
324	NASDAQ	ATRA	Fri, Jan 29, 2016	17.58	19.29	17.45	18.10
323	NASDAQ	ATRA	Thu, Jan 28, 2016	18.72	19.09	17.57	17.83
322	NASDAQ	ATRA	Wed, Jan 27, 2016	19.12	20.83	18.30	18.60
321	NASDAQ	ATRA	Tue, Jan 26, 2016	19.50	19.50	17.81	19.15
320	NASDAQ	ATRA	Mon, Jan 25, 2016	18.65	20.29	18.15	19.51
319	NASDAQ	ATRA	Fri, Jan 22, 2016	19.82	19.85	18.13	18.67
318	NASDAQ	ATRA	Thu, Jan 21, 2016	19.95	20.84	19.22	19.40
317	NASDAQ	ATRA	Wed, Jan 20, 2016	17.88	20.33	17.11	19.98
316	NASDAQ	ATRA	Tue, Jan 19, 2016	21.10	21.10	18.29	18.31
315	NASDAQ	ATRA	Fri, Jan 15, 2016	20.96	21.05	18.89	20.88
314	NASDAQ	ATRA	Thu, Jan 14, 2016	19.81	22.07	18.25	21.91
313	NASDAQ	ATRA	Wed, Jan 13, 2016	21.21	21.60	19.51	19.53
312	NASDAQ	ATRA	Tue, Jan 12, 2016	19.81	21.84	19.56	21.23
311	NASDAQ	ATRA	Mon, Jan 11, 2016	22.18	22.18	18.90	19.64
310	NASDAQ	ATRA	Fri, Jan 8, 2016	22.34	22.74	21.50	21.86
309	NASDAQ	ATRA	Thu, Jan 7, 2016	23.75	23.75	21.79	22.11
308	NASDAQ	ATRA	Wed, Jan 6, 2016	24.30	24.84	23.34	24.01
307	NASDAQ	ATRA	Tue, Jan 5, 2016	24.23	25.63	23.84	25.01
306	NASDAQ	ATRA	Mon, Jan 4, 2016	25.76	26.00	23.52	24.05
305	NASDAQ	ATRA	Thu, Dec 31, 2015	25.21	27.80	25.10	26.41
304	NASDAQ	ATRA	Wed, Dec 30, 2015	24.68	25.70	24.63	25.22
303	NASDAQ	ATRA	Tue, Dec 29, 2015	22.90	24.80	22.51	24.74
302	NASDAQ	ATRA	Mon, Dec 28, 2015	23.50	23.65	22.59	22.77
301	NASDAQ	ATRA	Thu, Dec 24, 2015	24.01	24.20	23.44	23.61
300	NASDAQ	ATRA	Wed, Dec 23, 2015	23.94	24.29	23.31	24.18
299	NASDAQ	ATRA	Tue, Dec 22, 2015	24.31	24.40	23.21	23.63
298	NASDAQ	ATRA	Mon, Dec 21, 2015	24.35	24.92	23.38	23.99
297	NASDAQ	ATRA	Fri, Dec 18, 2015	22.87	25.15	22.71	24.08
296	NASDAQ	ATRA	Thu, Dec 17, 2015	22.99	24.18	22.09	22.72
295	NASDAQ	ATRA	Wed, Dec 16, 2015	22.34	23.42	21.75	23.34
294	NASDAQ	ATRA	Tue, Dec 15, 2015	20.31	22.50	19.53	22.41
293	NASDAQ	ATRA	Mon, Dec 14, 2015	20.00	26.35	19.50	21.00
292	NASDAQ	ATRA	Fri, Dec 11, 2015	32.90	33.67	32.41	33.20
291	NASDAQ	ATRA	Thu, Dec 10, 2015	33.08	33.70	32.36	33.51
290	NASDAQ	ATRA	Wed, Dec 9, 2015	34.23	34.57	32.01	32.96
289	NASDAQ	ATRA	Tue, Dec 8, 2015	33.80	34.98	33.04	34.48
288	NASDAQ	ATRA	Mon, Dec 7, 2015	38.50	38.50	30.28	33.92
287	NASDAQ	ATRA	Fri, Dec 4, 2015	36.49	38.51	36.08	38.51
286	NASDAQ	ATRA	Thu, Dec 3, 2015	38.02	39.28	35.60	36.43
285	NASDAQ	ATRA	Wed, Dec 2, 2015	38.12	38.87	37.02	37.26
284	NASDAQ	ATRA	Tue, Dec 1, 2015	39.09	39.24	36.76	37.68
283	NASDAQ	ATRA	Mon, Nov 30, 2015	39.59	40.80	38.89	39.30
282	NASDAQ	ATRA	Fri, Nov 27, 2015	38.44	39.98	37.91	39.57
281	NASDAQ	ATRA	Wed, Nov 25, 2015	36.77	38.46	35.58	38.42
280	NASDAQ	ATRA	Tue, Nov 24, 2015	34.35	36.89	34.35	36.76
279	NASDAQ	ATRA	Mon, Nov 23, 2015	33.54	35.32	33.16	34.98
278	NASDAQ	ATRA	Fri, Nov 20, 2015	32.47	34.10	31.47	33.72
277	NASDAQ	ATRA	Thu, Nov 19, 2015	32.50	33.05	31.16	32.04
276	NASDAQ	ATRA	Wed, Nov 18, 2015	30.94	32.21	30.35	32.16
275	NASDAQ	ATRA	Tue, Nov 17, 2015	31.10	32.10	30.40	31.24
274	NASDAQ	ATRA	Mon, Nov 16, 2015	31.67	32.47	30.46	31.06
273	NASDAQ	ATRA	Fri, Nov 13, 2015	30.81	34.46	30.00	32.74
272	NASDAQ	ATRA	Thu, Nov 12, 2015	31.87	31.87	30.74	30.89
271	NASDAQ	ATRA	Wed, Nov 11, 2015	33.44	34.97	31.95	32.12
270	NASDAQ	ATRA	Tue, Nov 10, 2015	35.53	36.30	32.71	33.13
269	NASDAQ	ATRA	Mon, Nov 9, 2015	33.77	37.17	33.18	35.71
268	NASDAQ	ATRA	Fri, Nov 6, 2015	30.17	33.77	29.29	33.74
267	NASDAQ	ATRA	Thu, Nov 5, 2015	32.35	33.53	30.77	30.81
266	NASDAQ	ATRA	Wed, Nov 4, 2015	29.26	32.48	28.80	32.24
265	NASDAQ	ATRA	Tue, Nov 3, 2015	28.74	29.30	27.38	29.11
264	NASDAQ	ATRA	Mon, Nov 2, 2015	25.75	29.07	25.75	28.98
263	NASDAQ	ATRA	Fri, Oct 30, 2015	25.95	26.00	24.54	25.77
262	NASDAQ	ATRA	Thu, Oct 29, 2015	26.47	27.83	25.51	25.63
261	NASDAQ	ATRA	Wed, Oct 28, 2015	24.50	26.80	24.03	26.72
260	NASDAQ	ATRA	Tue, Oct 27, 2015	23.91	24.75	23.68	24.30
259	NASDAQ	ATRA	Mon, Oct 26, 2015	24.12	24.64	23.25	23.88
258	NASDAQ	ATRA	Fri, Oct 23, 2015	24.68	25.08	23.81	24.15
257	NASDAQ	ATRA	Thu, Oct 22, 2015	24.71	25.95	23.91	24.43
256	NASDAQ	ATRA	Wed, Oct 21, 2015	28.28	28.44	24.52	24.99
255	NASDAQ	ATRA	Tue, Oct 20, 2015	30.35	30.35	27.52	28.05
254	NASDAQ	ATRA	Mon, Oct 19, 2015	29.45	30.99	28.47	29.93
253	NASDAQ	ATRA	Fri, Oct 16, 2015	29.50	31.23	28.93	29.46
252	NASDAQ	ATRA	Thu, Oct 15, 2015	28.85	29.66	27.20	29.38
251	NASDAQ	ATRA	Wed, Oct 14, 2015	31.89	33.16	28.30	29.27
250	NASDAQ	ATRA	Tue, Oct 13, 2015	36.19	36.19	31.33	31.48
249	NASDAQ	ATRA	Mon, Oct 12, 2015	32.48	33.49	31.69	33.03
248	NASDAQ	ATRA	Fri, Oct 9, 2015	32.90	33.76	31.66	32.28
247	NASDAQ	ATRA	Thu, Oct 8, 2015	35.79	35.96	31.61	32.08
246	NASDAQ	ATRA	Wed, Oct 7, 2015	33.54	36.43	31.84	36.32
245	NASDAQ	ATRA	Tue, Oct 6, 2015	32.76	33.13	29.81	32.86
244	NASDAQ	ATRA	Mon, Oct 5, 2015	34.33	36.34	32.21	33.43
243	NASDAQ	ATRA	Fri, Oct 2, 2015	29.67	34.52	28.87	34.18
242	NASDAQ	ATRA	Thu, Oct 1, 2015	31.13	31.13	28.84	29.97
241	NASDAQ	ATRA	Wed, Sep 30, 2015	33.50	34.34	30.49	31.44
240	NASDAQ	ATRA	Tue, Sep 29, 2015	35.01	37.72	32.86	33.09
239	NASDAQ	ATRA	Mon, Sep 28, 2015	39.93	40.19	34.54	35.48
238	NASDAQ	ATRA	Fri, Sep 25, 2015	44.74	45.80	39.01	40.09
237	NASDAQ	ATRA	Thu, Sep 24, 2015	43.17	45.43	41.74	43.48
236	NASDAQ	ATRA	Wed, Sep 23, 2015	43.10	44.65	42.37	43.05
235	NASDAQ	ATRA	Tue, Sep 22, 2015	44.78	45.91	42.57	43.22
234	NASDAQ	ATRA	Mon, Sep 21, 2015	49.37	49.37	44.32	45.62
233	NASDAQ	ATRA	Fri, Sep 18, 2015	48.30	49.48	47.02	48.97
232	NASDAQ	ATRA	Thu, Sep 17, 2015	44.88	49.94	44.71	49.11
231	NASDAQ	ATRA	Wed, Sep 16, 2015	45.64	45.79	43.88	45.01
230	NASDAQ	ATRA	Tue, Sep 15, 2015	44.56	45.88	43.52	45.38
229	NASDAQ	ATRA	Mon, Sep 14, 2015	47.45	47.74	44.02	44.58
228	NASDAQ	ATRA	Fri, Sep 11, 2015	46.54	48.03	44.96	47.37
227	NASDAQ	ATRA	Thu, Sep 10, 2015	43.89	47.00	43.06	46.81
226	NASDAQ	ATRA	Wed, Sep 9, 2015	44.93	46.19	44.02	44.37
225	NASDAQ	ATRA	Tue, Sep 8, 2015	44.47	44.74	41.99	43.76
224	NASDAQ	ATRA	Fri, Sep 4, 2015	41.97	43.99	41.19	42.11
223	NASDAQ	ATRA	Thu, Sep 3, 2015	43.15	44.04	41.02	42.59
222	NASDAQ	ATRA	Wed, Sep 2, 2015	40.94	43.48	39.09	43.15
221	NASDAQ	ATRA	Tue, Sep 1, 2015	39.71	40.35	37.80	39.02
220	NASDAQ	ATRA	Mon, Aug 31, 2015	40.25	44.90	40.25	40.53
219	NASDAQ	ATRA	Fri, Aug 28, 2015	39.73	40.72	38.83	40.22
218	NASDAQ	ATRA	Thu, Aug 27, 2015	40.57	40.89	37.75	39.97
217	NASDAQ	ATRA	Wed, Aug 26, 2015	41.04	41.45	38.05	39.45
216	NASDAQ	ATRA	Tue, Aug 25, 2015	39.94	40.82	38.44	40.02
215	NASDAQ	ATRA	Mon, Aug 24, 2015	39.57	42.57	37.86	38.29
214	NASDAQ	ATRA	Fri, Aug 21, 2015	42.00	42.89	41.00	42.01
213	NASDAQ	ATRA	Thu, Aug 20, 2015	46.44	46.64	42.25	42.80
212	NASDAQ	ATRA	Wed, Aug 19, 2015	48.83	49.49	47.02	47.07
211	NASDAQ	ATRA	Tue, Aug 18, 2015	50.59	50.97	48.54	49.52
210	NASDAQ	ATRA	Mon, Aug 17, 2015	46.19	50.21	45.40	50.06
209	NASDAQ	ATRA	Fri, Aug 14, 2015	47.85	49.43	46.42	47.18
208	NASDAQ	ATRA	Thu, Aug 13, 2015	51.26	51.30	46.72	47.80
207	NASDAQ	ATRA	Wed, Aug 12, 2015	48.21	51.79	47.41	51.62
206	NASDAQ	ATRA	Tue, Aug 11, 2015	50.03	52.12	49.08	49.32
205	NASDAQ	ATRA	Mon, Aug 10, 2015	49.51	51.98	49.51	50.02
204	NASDAQ	ATRA	Fri, Aug 7, 2015	55.46	55.51	50.02	51.78
203	NASDAQ	ATRA	Thu, Aug 6, 2015	59.41	59.41	53.12	55.98
202	NASDAQ	ATRA	Wed, Aug 5, 2015	57.23	59.12	57.20	58.42
201	NASDAQ	ATRA	Tue, Aug 4, 2015	57.56	58.00	54.96	56.96
200	NASDAQ	ATRA	Mon, Aug 3, 2015	56.23	58.60	54.57	56.98
199	NASDAQ	ATRA	Fri, Jul 31, 2015	55.43	58.24	54.70	56.14
198	NASDAQ	ATRA	Thu, Jul 30, 2015	58.38	59.02	55.43	55.62
197	NASDAQ	ATRA	Wed, Jul 29, 2015	59.85	61.05	57.58	58.83
196	NASDAQ	ATRA	Tue, Jul 28, 2015	58.53	61.48	57.19	59.73
195	NASDAQ	ATRA	Mon, Jul 27, 2015	55.40	58.29	54.42	57.89
194	NASDAQ	ATRA	Fri, Jul 24, 2015	58.88	59.23	55.22	55.98
193	NASDAQ	ATRA	Thu, Jul 23, 2015	59.57	61.41	59.15	59.33
192	NASDAQ	ATRA	Wed, Jul 22, 2015	58.48	61.14	57.51	59.97
191	NASDAQ	ATRA	Tue, Jul 21, 2015	56.09	60.49	56.09	59.45
190	NASDAQ	ATRA	Mon, Jul 20, 2015	59.70	61.18	55.98	56.30
189	NASDAQ	ATRA	Fri, Jul 17, 2015	61.33	63.14	59.02	59.92
188	NASDAQ	ATRA	Thu, Jul 16, 2015	63.71	64.98	60.08	61.31
187	NASDAQ	ATRA	Wed, Jul 15, 2015	63.56	65.25	61.21	62.16
186	NASDAQ	ATRA	Tue, Jul 14, 2015	61.97	65.56	60.89	63.11
185	NASDAQ	ATRA	Mon, Jul 13, 2015	55.16	62.42	54.27	62.03
184	NASDAQ	ATRA	Fri, Jul 10, 2015	52.99	54.48	51.15	54.17
183	NASDAQ	ATRA	Thu, Jul 9, 2015	49.49	55.54	49.34	53.41
182	NASDAQ	ATRA	Wed, Jul 8, 2015	45.53	50.19	44.83	48.83
181	NASDAQ	ATRA	Tue, Jul 7, 2015	47.63	47.63	44.92	46.32
180	NASDAQ	ATRA	Mon, Jul 6, 2015	44.57	47.29	43.57	47.24
179	NASDAQ	ATRA	Thu, Jul 2, 2015	46.21	46.26	43.98	45.50
178	NASDAQ	ATRA	Wed, Jul 1, 2015	53.34	53.87	45.01	45.33
177	NASDAQ	ATRA	Tue, Jun 30, 2015	51.35	53.98	51.32	52.76
176	NASDAQ	ATRA	Mon, Jun 29, 2015	50.67	53.07	49.20	51.55
175	NASDAQ	ATRA	Fri, Jun 26, 2015	52.57	53.72	51.20	52.62
174	NASDAQ	ATRA	Thu, Jun 25, 2015	52.18	53.59	51.25	52.63
173	NASDAQ	ATRA	Wed, Jun 24, 2015	53.51	54.61	51.72	52.09
172	NASDAQ	ATRA	Tue, Jun 23, 2015	54.48	54.90	53.12	54.12
171	NASDAQ	ATRA	Mon, Jun 22, 2015	54.87	56.23	54.03	54.20
170	NASDAQ	ATRA	Fri, Jun 19, 2015	52.84	54.90	52.02	54.07
169	NASDAQ	ATRA	Thu, Jun 18, 2015	55.89	59.50	52.16	52.54
168	NASDAQ	ATRA	Wed, Jun 17, 2015	52.54	56.28	52.02	55.82
167	NASDAQ	ATRA	Tue, Jun 16, 2015	56.00	58.80	51.00	52.07
166	NASDAQ	ATRA	Mon, Jun 15, 2015	48.99	56.84	44.56	56.19
165	NASDAQ	ATRA	Fri, Jun 12, 2015	43.15	48.04	42.90	48.00
164	NASDAQ	ATRA	Thu, Jun 11, 2015	44.87	45.07	43.45	44.15
163	NASDAQ	ATRA	Wed, Jun 10, 2015	44.15	45.17	43.08	44.49
162	NASDAQ	ATRA	Tue, Jun 9, 2015	44.56	44.69	42.05	44.15
161	NASDAQ	ATRA	Mon, Jun 8, 2015	45.47	46.89	43.70	44.72
160	NASDAQ	ATRA	Fri, Jun 5, 2015	43.30	45.37	42.27	45.22
159	NASDAQ	ATRA	Thu, Jun 4, 2015	41.15	43.58	40.60	43.20
158	NASDAQ	ATRA	Wed, Jun 3, 2015	41.30	41.30	39.21	40.89
157	NASDAQ	ATRA	Tue, Jun 2, 2015	41.30	43.19	40.36	41.42
156	NASDAQ	ATRA	Mon, Jun 1, 2015	42.55	44.15	40.42	40.63
155	NASDAQ	ATRA	Fri, May 29, 2015	39.84	43.42	39.19	42.36
154	NASDAQ	ATRA	Thu, May 28, 2015	39.16	39.84	39.02	39.78
153	NASDAQ	ATRA	Wed, May 27, 2015	38.68	39.71	38.24	39.57
152	NASDAQ	ATRA	Tue, May 26, 2015	38.07	39.21	37.52	38.54
151	NASDAQ	ATRA	Fri, May 22, 2015	37.17	38.29	36.83	37.73
150	NASDAQ	ATRA	Thu, May 21, 2015	39.40	39.49	36.71	37.33
149	NASDAQ	ATRA	Wed, May 20, 2015	38.16	39.53	38.00	39.40
148	NASDAQ	ATRA	Tue, May 19, 2015	38.51	39.00	36.00	37.99
147	NASDAQ	ATRA	Mon, May 18, 2015	37.30	39.89	37.19	39.56
146	NASDAQ	ATRA	Fri, May 15, 2015	37.50	38.38	37.03	37.30
145	NASDAQ	ATRA	Thu, May 14, 2015	38.17	39.30	37.02	37.58
144	NASDAQ	ATRA	Wed, May 13, 2015	38.83	39.05	37.20	38.44
143	NASDAQ	ATRA	Tue, May 12, 2015	37.24	40.33	37.05	40.24
142	NASDAQ	ATRA	Mon, May 11, 2015	37.40	39.34	37.02	37.70
141	NASDAQ	ATRA	Fri, May 8, 2015	37.31	39.50	36.50	37.37
140	NASDAQ	ATRA	Thu, May 7, 2015	38.24	38.64	36.51	36.67
139	NASDAQ	ATRA	Wed, May 6, 2015	39.07	39.95	38.00	38.03
138	NASDAQ	ATRA	Tue, May 5, 2015	40.89	42.16	38.25	39.08
137	NASDAQ	ATRA	Mon, May 4, 2015	40.38	41.45	39.61	41.21
136	NASDAQ	ATRA	Fri, May 1, 2015	41.82	43.49	39.02	40.45
135	NASDAQ	ATRA	Thu, Apr 30, 2015	45.64	45.83	40.71	41.45
134	NASDAQ	ATRA	Wed, Apr 29, 2015	46.87	49.83	46.02	46.23
133	NASDAQ	ATRA	Tue, Apr 28, 2015	48.07	49.61	42.67	47.02
132	NASDAQ	ATRA	Mon, Apr 27, 2015	59.79	60.97	48.26	48.29
131	NASDAQ	ATRA	Fri, Apr 24, 2015	63.85	64.35	59.58	59.89
130	NASDAQ	ATRA	Thu, Apr 23, 2015	64.00	64.17	61.11	64.02
129	NASDAQ	ATRA	Wed, Apr 22, 2015	56.71	64.13	56.15	63.79
128	NASDAQ	ATRA	Tue, Apr 21, 2015	54.16	56.33	53.35	56.15
127	NASDAQ	ATRA	Mon, Apr 20, 2015	53.21	54.96	50.08	53.61
126	NASDAQ	ATRA	Fri, Apr 17, 2015	52.72	53.48	50.95	52.24
125	NASDAQ	ATRA	Thu, Apr 16, 2015	47.53	53.48	47.66	53.28
124	NASDAQ	ATRA	Wed, Apr 15, 2015	47.87	49.23	47.56	47.75
123	NASDAQ	ATRA	Tue, Apr 14, 2015	47.71	48.48	46.69	47.78
122	NASDAQ	ATRA	Mon, Apr 13, 2015	47.51	49.38	47.35	47.88
121	NASDAQ	ATRA	Fri, Apr 10, 2015	47.19	48.72	46.19	47.49
120	NASDAQ	ATRA	Thu, Apr 9, 2015	46.33	48.63	44.46	46.89
119	NASDAQ	ATRA	Wed, Apr 8, 2015	42.76	46.27	42.45	45.95
118	NASDAQ	ATRA	Tue, Apr 7, 2015	41.16	43.87	40.24	42.56
117	NASDAQ	ATRA	Mon, Apr 6, 2015	43.12	44.98	41.36	41.67
116	NASDAQ	ATRA	Thu, Apr 2, 2015	40.18	43.91	40.18	43.18
115	NASDAQ	ATRA	Wed, Apr 1, 2015	41.67	42.36	38.62	40.18
114	NASDAQ	ATRA	Tue, Mar 31, 2015	42.86	43.66	40.59	41.57
113	NASDAQ	ATRA	Mon, Mar 30, 2015	37.10	42.98	37.10	42.90
112	NASDAQ	ATRA	Fri, Mar 27, 2015	34.72	37.37	34.32	36.60
111	NASDAQ	ATRA	Thu, Mar 26, 2015	35.85	36.06	32.70	34.90
110	NASDAQ	ATRA	Wed, Mar 25, 2015	38.67	39.05	32.52	36.25
109	NASDAQ	ATRA	Tue, Mar 24, 2015	38.96	41.74	38.01	38.94
108	NASDAQ	ATRA	Mon, Mar 23, 2015	39.00	39.96	35.50	38.96
107	NASDAQ	ATRA	Fri, Mar 20, 2015	36.18	39.94	36.18	38.78
106	NASDAQ	ATRA	Thu, Mar 19, 2015	31.77	36.03	31.52	35.89
105	NASDAQ	ATRA	Wed, Mar 18, 2015	33.06	33.30	31.41	31.79
104	NASDAQ	ATRA	Tue, Mar 17, 2015	33.00	34.28	32.93	33.34
103	NASDAQ	ATRA	Mon, Mar 16, 2015	31.72	34.05	31.72	33.10
102	NASDAQ	ATRA	Fri, Mar 13, 2015	32.98	32.98	29.41	31.42
101	NASDAQ	ATRA	Thu, Mar 12, 2015	32.32	35.41	32.32	33.12
100	NASDAQ	ATRA	Wed, Mar 11, 2015	30.29	32.85	29.31	31.75
99	NASDAQ	ATRA	Tue, Mar 10, 2015	29.46	30.99	29.07	30.07
98	NASDAQ	ATRA	Mon, Mar 9, 2015	28.54	29.82	26.83	29.75
97	NASDAQ	ATRA	Fri, Mar 6, 2015	28.47	29.89	27.46	28.31
96	NASDAQ	ATRA	Thu, Mar 5, 2015	26.75	30.40	25.54	28.75
95	NASDAQ	ATRA	Wed, Mar 4, 2015	22.05	26.77	21.15	26.55
94	NASDAQ	ATRA	Tue, Mar 3, 2015	20.68	22.11	20.27	22.02
93	NASDAQ	ATRA	Mon, Mar 2, 2015	20.20	21.14	19.80	20.48
92	NASDAQ	ATRA	Fri, Feb 27, 2015	20.65	20.70	19.10	19.56
91	NASDAQ	ATRA	Thu, Feb 26, 2015	20.89	21.67	19.66	20.96
90	NASDAQ	ATRA	Wed, Feb 25, 2015	21.46	21.49	20.05	20.79
89	NASDAQ	ATRA	Tue, Feb 24, 2015	22.75	22.75	21.00	21.46
88	NASDAQ	ATRA	Mon, Feb 23, 2015	21.28	23.25	21.28	22.87
87	NASDAQ	ATRA	Fri, Feb 20, 2015	21.78	22.64	21.01	21.32
86	NASDAQ	ATRA	Thu, Feb 19, 2015	20.50	21.77	20.00	21.66
85	NASDAQ	ATRA	Wed, Feb 18, 2015	19.00	20.18	18.90	20.08
84	NASDAQ	ATRA	Tue, Feb 17, 2015	18.19	18.95	18.16	18.90
83	NASDAQ	ATRA	Fri, Feb 13, 2015	18.00	18.28	17.80	18.00
82	NASDAQ	ATRA	Thu, Feb 12, 2015	18.63	18.85	17.25	18.10
81	NASDAQ	ATRA	Wed, Feb 11, 2015	18.99	18.99	17.49	18.55
80	NASDAQ	ATRA	Tue, Feb 10, 2015	17.36	19.29	17.20	19.14
79	NASDAQ	ATRA	Mon, Feb 9, 2015	19.16	19.53	18.28	18.30
78	NASDAQ	ATRA	Fri, Feb 6, 2015	19.27	19.74	18.56	19.28
77	NASDAQ	ATRA	Thu, Feb 5, 2015	20.97	20.95	19.11	19.27
76	NASDAQ	ATRA	Wed, Feb 4, 2015	22.85	24.74	20.81	20.98
75	NASDAQ	ATRA	Tue, Feb 3, 2015	23.64	23.86	22.29	23.03
74	NASDAQ	ATRA	Mon, Feb 2, 2015	24.40	24.60	23.32	23.46
73	NASDAQ	ATRA	Fri, Jan 30, 2015	24.07	25.04	22.67	24.36
72	NASDAQ	ATRA	Thu, Jan 29, 2015	22.87	24.53	22.59	24.45
71	NASDAQ	ATRA	Wed, Jan 28, 2015	24.62	24.62	22.54	22.75
70	NASDAQ	ATRA	Tue, Jan 27, 2015	23.50	25.20	23.96	24.64
69	NASDAQ	ATRA	Mon, Jan 26, 2015	23.20	25.00	23.20	23.83
68	NASDAQ	ATRA	Fri, Jan 23, 2015	23.75	25.00	23.03	23.14
67	NASDAQ	ATRA	Thu, Jan 22, 2015	23.62	24.55	23.20	23.60
66	NASDAQ	ATRA	Wed, Jan 21, 2015	23.62	24.18	23.13	23.38
65	NASDAQ	ATRA	Tue, Jan 20, 2015	25.18	24.87	23.08	23.84
64	NASDAQ	ATRA	Fri, Jan 16, 2015	24.57	25.85	24.57	25.15
63	NASDAQ	ATRA	Thu, Jan 15, 2015	26.73	26.73	24.50	24.69
62	NASDAQ	ATRA	Wed, Jan 14, 2015	25.37	27.26	25.36	26.73
61	NASDAQ	ATRA	Tue, Jan 13, 2015	27.70	27.70	25.36	25.72
60	NASDAQ	ATRA	Mon, Jan 12, 2015	25.33	27.80	25.00	27.46
59	NASDAQ	ATRA	Fri, Jan 9, 2015	25.98	26.82	25.25	25.37
58	NASDAQ	ATRA	Thu, Jan 8, 2015	26.36	27.13	25.80	26.11
57	NASDAQ	ATRA	Wed, Jan 7, 2015	26.23	27.51	25.97	26.00
56	NASDAQ	ATRA	Tue, Jan 6, 2015	27.88	28.27	25.51	25.89
55	NASDAQ	ATRA	Mon, Jan 5, 2015	26.60	27.85	25.98	27.78
54	NASDAQ	ATRA	Fri, Jan 2, 2015	26.70	26.70	26.25	26.70
53	NASDAQ	ATRA	Wed, Dec 31, 2014	27.26	27.55	26.53	26.75
52	NASDAQ	ATRA	Tue, Dec 30, 2014	27.19	28.89	26.56	27.26
51	NASDAQ	ATRA	Mon, Dec 29, 2014	27.51	28.30	26.55	27.09
50	NASDAQ	ATRA	Fri, Dec 26, 2014	28.26	29.13	26.44	27.71
49	NASDAQ	ATRA	Wed, Dec 24, 2014	27.36	28.51	27.36	28.00
48	NASDAQ	ATRA	Tue, Dec 23, 2014	26.88	28.63	25.71	27.59
47	NASDAQ	ATRA	Mon, Dec 22, 2014	27.87	28.15	26.34	27.32
46	NASDAQ	ATRA	Fri, Dec 19, 2014	27.88	31.05	27.06	27.85
45	NASDAQ	ATRA	Thu, Dec 18, 2014	30.15	33.50	27.01	27.95
44	NASDAQ	ATRA	Wed, Dec 17, 2014	24.21	30.59	23.03	30.12
43	NASDAQ	ATRA	Tue, Dec 16, 2014	22.95	25.50	22.51	24.35
42	NASDAQ	ATRA	Mon, Dec 15, 2014	25.60	28.03	21.34	22.50
41	NASDAQ	ATRA	Fri, Dec 12, 2014	27.14	29.19	25.05	25.49
40	NASDAQ	ATRA	Thu, Dec 11, 2014	30.72	31.91	27.58	27.60
39	NASDAQ	ATRA	Wed, Dec 10, 2014	28.51	32.10	28.51	31.03
38	NASDAQ	ATRA	Tue, Dec 9, 2014	28.51	29.50	27.14	28.14
37	NASDAQ	ATRA	Mon, Dec 8, 2014	30.38	34.63	29.92	30.48
36	NASDAQ	ATRA	Fri, Dec 5, 2014	30.97	33.23	29.66	30.48
35	NASDAQ	ATRA	Thu, Dec 4, 2014	30.90	34.99	31.05	31.51
34	NASDAQ	ATRA	Wed, Dec 3, 2014	32.25	35.45	29.45	30.48
33	NASDAQ	ATRA	Tue, Dec 2, 2014	26.52	33.96	26.52	31.80
32	NASDAQ	ATRA	Mon, Dec 1, 2014	26.93	27.30	24.65	26.66
31	NASDAQ	ATRA	Fri, Nov 28, 2014	27.31	27.31	26.56	27.00
30	NASDAQ	ATRA	Wed, Nov 26, 2014	26.19	27.74	25.06	26.99
29	NASDAQ	ATRA	Tue, Nov 25, 2014	27.00	27.54	23.67	25.89
28	NASDAQ	ATRA	Mon, Nov 24, 2014	26.58	27.99	26.58	27.06
27	NASDAQ	ATRA	Fri, Nov 21, 2014	26.40	27.00	25.55	26.87
26	NASDAQ	ATRA	Thu, Nov 20, 2014	27.49	27.49	25.55	26.08
25	NASDAQ	ATRA	Wed, Nov 19, 2014	26.84	27.45	25.01	27.00
24	NASDAQ	ATRA	Tue, Nov 18, 2014	26.16	27.43	25.01	26.35
23	NASDAQ	ATRA	Mon, Nov 17, 2014	22.48	27.48	19.81	26.67
22	NASDAQ	ATRA	Fri, Nov 14, 2014	23.11	23.96	22.54	23.17
21	NASDAQ	ATRA	Thu, Nov 13, 2014	22.89	24.00	22.75	23.74
20	NASDAQ	ATRA	Wed, Nov 12, 2014	29.89	29.89	19.86	22.55
19	NASDAQ	ATRA	Tue, Nov 11, 2014	28.89	29.48	26.75	27.21
18	NASDAQ	ATRA	Mon, Nov 10, 2014	199999.99	29.51	25.10	26.42
17	NASDAQ	ATRA	Fri, Nov 7, 2014	24.75	29.36	24.75	28.75
16	NASDAQ	ATRA	Thu, Nov 6, 2014	25.00	26.78	24.80	24.80
15	NASDAQ	ATRA	Wed, Nov 5, 2014	24.28	27.50	24.01	24.91
14	NASDAQ	ATRA	Tue, Nov 4, 2014	24.22	27.40	23.25	23.95
13	NASDAQ	ATRA	Mon, Nov 3, 2014	19.00	24.21	19.00	23.93
12	NASDAQ	ATRA	Fri, Oct 31, 2014	20.14	20.14	19.00	19.18
11	NASDAQ	ATRA	Thu, Oct 30, 2014	19.38	19.89	18.37	19.72
10	NASDAQ	ATRA	Wed, Oct 29, 2014	20.07	20.87	17.40	18.80
9	NASDAQ	ATRA	Tue, Oct 28, 2014	17.26	20.24	17.26	20.24
8	NASDAQ	ATRA	Mon, Oct 27, 2014	15.25	17.85	14.66	17.34
7	NASDAQ	ATRA	Fri, Oct 24, 2014	13.99	14.99	13.54	14.89
6	NASDAQ	ATRA	Thu, Oct 23, 2014	13.56	14.00	12.61	13.28
5	NASDAQ	ATRA	Wed, Oct 22, 2014	13.32	14.53	13.30	13.67
4	NASDAQ	ATRA	Tue, Oct 21, 2014	14.37	15.24	13.00	13.85
3	NASDAQ	ATRA	Mon, Oct 20, 2014	12.04	15.17	12.04	14.35
2	NASDAQ	ATRA	Fri, Oct 17, 2014	10.26	12.50	10.10	12.00
1	NASDAQ	ATRA	Thu, Oct 16, 2014	9.89	11.25	9.66	10.65
#	Exchange	Symbol	Date	Open	High	Low	Close

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