Legal Insider Trading Data | Free and Professional Subscription Services | Insider Insights urn:uuid:c64da64c-2094-b121-adb2-0e25205695fa 2026-09-17T22:15:12-04:00 Jonathan Moreland Profit from legal insider trading. InsiderInsights.com provides free insider trading data tools and resources, and professional grade subscription based real time Form 4 data, analysis and services COLB: GARDNER STEVEN R (DIR) Acquired (JB) 2,577 Shares of COLUMBIA BANKING SYSTEM INC for $0.00 on 9/4 urn:uuid:1d7da3d7-e538-f973-a878-513e74424790 2026-09-08T17:24:35-04:00 COLB: LAGOMARSINO SIMONE (DIR) Acquired (JB) 2,670 Shares of COLUMBIA BANKING SYSTEM INC for $0.00 on 9/2 urn:uuid:dcb245ba-3e22-a03a-5ce5-315718fac453 2026-09-04T16:41:52-04:00 COLB: LAGOMARSINO SIMONE (DIR) Filed a Form 3, Becoming a Registered Insider at COLUMBIA BANKING SYSTEM INC With Initial Indirect Holdings of 32,931 urn:uuid:145d45d9-c422-55b3-9467-ed8314acc802 2026-09-02T16:37:37-04:00 COLB: LAGOMARSINO SIMONE (DIR) Filed a Form 3, Becoming a Registered Insider at COLUMBIA BANKING SYSTEM INC With Initial Indirect Holdings of 7 urn:uuid:38890dd7-3c7e-4e47-e496-d853edf764e2 2026-09-02T16:37:37-04:00 COLB: GIEM JUDI (VP) Acquired (JB) 2,393 Shares of COLUMBIA BANKING SYSTEM INC for $32.69 on 8/14 urn:uuid:640d4018-7999-0141-a8eb-bc20f1af31d1 2026-08-18T16:50:51-04:00 COLB: GIEM JUDI (VP) Disposed (JS) 643 Shares of COLUMBIA BANKING SYSTEM INC for $32.69 on 8/14 urn:uuid:071fdaf0-8e7c-f171-ac13-6af18c93229e 2026-08-18T16:50:51-04:00 COLB: DEER AARON JAMES (VP) Bought (JB*) 886 Shares of COLUMBIA BANKING SYSTEM INC for $25.37 on 6/30 urn:uuid:9cb4c12d-bbb2-cc35-f8d2-32f1b52f77b4 2026-07-02T17:17:10-04:00 COLB: MOORE DEVINE DAVID (VP,SO) Sold (S) 3,872 Shares of COLUMBIA BANKING SYSTEM INC for $29.77 on 6/8 urn:uuid:904f61e9-85ef-9622-6528-8790ab9c4e53 2026-06-10T16:52:47-04:00 COLB: VARNADO ANDDRIA (DIR) Acquired (JB) 3,949 Shares of COLUMBIA BANKING SYSTEM INC for $0.00 on 5/14 urn:uuid:5f1fbde0-6b93-3dc5-ced2-d4ea77cba180 2026-05-18T17:18:03-04:00 COLB: TERRY HILLIARD C III (DIR) Acquired (JB) 3,949 Shares of COLUMBIA BANKING SYSTEM INC for $0.00 on 5/14 urn:uuid:37b699d6-a2e3-50f9-caa4-45f1c789b7ed 2026-05-18T17:17:04-04:00