| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 12/31/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 2.6k | $40.69 | $107.2k | | 12/31/2019 |
| 12/31/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Other (acquisition) | Common Stock | 6.7k | $40.69 | $272.4k | | 12/31/2019 |
| 12/31/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Other (disposition) | Common Stock | 14.5k | $0.00 | $0 | | 12/31/2019 |
| 04/26/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 3.9k | $36.71 | $143.5k | | 04/26/2019 |
| 03/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 5.4k | $32.01 | $172.7k | | 03/27/2019 |
| 03/25/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 323 | $31.07 | $10k | | 03/25/2019 |
| 02/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 987 | $36.29 | $35.8k | | 02/27/2019 |
| 02/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 4.2k | $36.29 | $151.8k | | 02/27/2019 |
| 02/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 4.2k | $36.29 | $151.8k | | 02/27/2019 |
| 02/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 552 | $36.29 | $20k | | 02/27/2019 |
| 02/22/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 486 | $38.32 | $18.6k | | 02/22/2019 |
| 03/23/2018 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 194 | $41.22 | $8k | | 03/23/2018 |
| 02/28/2018 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 3.7k | $43.44 | $159.8k | | 02/28/2018 |
| 02/28/2018 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 3.9k | $41.78 | $164.3k | | 02/28/2018 |
| 02/28/2018 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 892 | $43.44 | $38.7k | | 02/28/2018 |
| 02/26/2018 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 297 | $42.67 | $12.7k | | 02/26/2018 |
| 02/23/2018 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 204 | $42.68 | $8.7k | | 02/23/2018 |
| 04/26/2017 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 10k | $40.67 | $406.7k | | 04/26/2017 |
| 03/31/2017 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 411 | $38.99 | $16k | | 03/31/2017 |
| 03/27/2017 | COLUMBIA BANKING SYSTEM, INC. | COLB | Other | Stock Option | 2k | $136.93 | $268.1k | | 03/24/2017 |
| 03/24/2017 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 145 | $37.72 | $5.5k | | 03/24/2017 |
| 02/22/2017 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common | 2.7k | $41.25 | $112k | | 02/22/2017 |
| 05/28/2011 | WEST COAST BANCORP /NEW/OR/ | WCBO | Grant | Common Stock | 1.2k | $0.00 | $0 | | 05/28/2011 |