AON's most recent stock split occurred on May 18, 1999. It was a 3-for-2 split.
Total Stock Splits: 4
| Ex Date | Adjustment Factor | Split From | Split To | Split Type |
|---|---|---|---|---|
| 1987-05-27 | 2 | 1 | 2 | stock split |
| 1994-05-17 | 1.5 | 2 | 3 | stock split |
| 1997-05-15 | 1.5 | 2 | 3 | stock split |
| 1999-05-18 | 1.5 | 2 | 3 | stock split |
