| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 03/14/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 17k | $0.00 | $0 | | 03/14/2023 |
| 02/28/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 14.4k | $0.00 | $0 | | 02/28/2023 |
| 02/28/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 7.9k | $0.00 | $0 | | 02/28/2023 |
| 02/28/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 16.2k | $0.00 | $0 | | 02/28/2023 |
| 02/21/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 22.4k | $0.00 | $0 | | 02/21/2023 |
| 02/21/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 10.3k | $0.00 | $0 | | 02/21/2023 |
| 02/21/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 4.1k | $30.77 | $125.1k | | 02/21/2023 |
| 02/21/2023 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 29.9k | $0.00 | $0 | | 02/21/2023 |
| 03/25/2022 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 540 | $0.00 | $0 | | 03/25/2022 |
| 03/07/2022 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 2.8k | $32.72 | $92.3k | | 03/07/2022 |
| 03/07/2022 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 1.1k | $32.72 | $36.3k | | 03/07/2022 |
| 02/28/2022 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 654 | $36.63 | $24k | | 02/28/2022 |
| 02/15/2022 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 1.8k | $36.75 | $66k | | 02/15/2022 |
| 02/15/2022 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 1.6k | $36.75 | $57.7k | | 02/15/2022 |
| 03/26/2021 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 360 | $45.11 | $16.2k | | 03/26/2021 |
| 03/18/2021 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 4.1k | $0.00 | $0 | | 03/18/2021 |
| 03/18/2021 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 1.6k | $35.90 | $58.3k | | 03/18/2021 |
| 02/26/2021 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 393 | $44.29 | $17.4k | | 02/26/2021 |
| 02/22/2021 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 499 | $45.93 | $22.9k | | 02/22/2021 |
| 02/15/2021 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 1.9k | $43.09 | $81.5k | | 02/15/2021 |
| 01/07/2021 | COLUMBIA BANKING SYSTEM, INC. | COLB | Purchase | Common Stock | 179 | $24.06 | $4.3k | | 01/07/2021 |
| 07/02/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Purchase | Common Stock | 250 | $25.51 | $6.4k | | 07/02/2020 |
| 02/28/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 285 | $33.20 | $9.5k | | 02/28/2020 |
| 02/27/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 2.9k | $0.00 | $0 | | 02/27/2020 |
| 02/27/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 1.1k | $40.69 | $45.7k | | 02/27/2020 |
| 02/27/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 2.9k | $40.69 | $118.4k | | 02/27/2020 |
| 02/24/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 693 | $37.48 | $26k | | 02/24/2020 |
| 02/21/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 318 | $38.69 | $12.3k | | 02/21/2020 |
| 01/03/2020 | COLUMBIA BANKING SYSTEM, INC. | COLB | Purchase | Common Stock | 68 | $32.81 | $2.2k | | 01/03/2020 |
| 07/01/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Purchase | Common Stock | 143 | $32.56 | $4.7k | | 07/01/2019 |
| 04/26/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 3.9k | $36.71 | $144.5k | | 04/26/2019 |
| 03/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 4.6k | $32.01 | $146.2k | | 03/27/2019 |
| 03/25/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 486 | $31.07 | $15.1k | | 03/25/2019 |
| 02/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Grant | Common Stock | 3.9k | $36.29 | $142.1k | | 02/27/2019 |
| 02/27/2019 | COLUMBIA BANKING SYSTEM, INC. | COLB | Payment of Exercise | Common Stock | 938 | $36.29 | $34k | | 02/27/2019 |
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