Robert Addison Day | |
|---|---|
 | |
| Born | December 11, 1943 Los Angeles, California, U.S. |
| Died | (aged 79) Los Angeles, California, U.S. |
| Occupation(s) | Businessman, investor, philanthropist |
| Spouses |
Kelly Day (divorced)Marina Day (divorced) |
| Children | 3 |
| Relatives | William Myron Keck (grandfather) |
Robert Addison Day (December 11, 1943 – September 14, 2023) was an American businessman, investor, and philanthropist. He was the founder and former chairman and chief executive officer of Trust Company of the West until 2009. He was the chairman and president of the W. M. Keck Foundation.