{"schema_version":"alpha-governance-record-v2","alpha_id":"alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac","record_version":"public-1:ro-d751713988987e9331980363e24189ce","ontology_version":"alpha-governance-ontology-v1","as_of":"2026-10-16T04:45:39.548171+00:00","published_at":"2026-10-16T04:45:39.548171+00:00","section":"events","data":{"state":"PUBLISHED","derivation_version":"alpha-governance-event-derivation-v2","events":[{"event_id":"alpha:event:transition:icdmnbwid02z","event_type":"DIRECTOR_APPOINTED","effective_at":"2025-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:jaynie-miller-studenmund","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:11"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Jaynie Miller Studenmund seat on COLUMBIA BANKING SYSTEM, INC., effective 2025-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:14iez1t1g8vg01","event_type":"DIRECTOR_APPOINTED","effective_at":"2025-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:m-christian-mitchell","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:13"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"M. Christian Mitchell seat on COLUMBIA BANKING SYSTEM, INC., effective 2025-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1j51te1lucdt4","event_type":"DIRECTOR_APPOINTED","effective_at":"2025-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:steven-r-gardner","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:16"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Steven R. Gardner seat on COLUMBIA BANKING SYSTEM, INC., effective 2025-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:6sitnn14bprut","event_type":"COMMITTEE_CREATED","effective_at":"2025-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:audit-risk","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:13"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Audit; Risk committee of COLUMBIA BANKING SYSTEM, INC., effective 2025-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1ntze1q1ks4qkq","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2025-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:m-christian-mitchell","alpha:committee:columbia-banking-system-inc:audit-risk"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:13"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"M. Christian Mitchell member of Audit; Risk, effective 2025-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:197ycxb8j5vr7","event_type":"COMMITTEE_CREATED","effective_at":"2025-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:compensation-nominating-and-governance","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:11"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Compensation; Nominating and Governance committee of COLUMBIA BANKING SYSTEM, INC., effective 2025-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:foatc794axol","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2025-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:jaynie-miller-studenmund","alpha:committee:columbia-banking-system-inc:compensation-nominating-and-governance"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:11"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Jaynie Miller Studenmund member of Compensation; Nominating and Governance, effective 2025-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:zcts4s5bgin6","event_type":"DIRECTOR_APPOINTED","effective_at":"2020-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:clint-e-stein","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:8"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Clint E. Stein seat on COLUMBIA BANKING SYSTEM, INC., effective 2020-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:636h981lm455i","event_type":"DIRECTOR_APPOINTED","effective_at":"2018-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:anddria-varnado","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:7"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Anddria Varnado seat on COLUMBIA BANKING SYSTEM, INC., effective 2018-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:ibbjpakniq0a","event_type":"COMMITTEE_CREATED","effective_at":"2018-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:audit-technology","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:7"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Audit; Technology committee of COLUMBIA BANKING SYSTEM, INC., effective 2018-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:11jtg8o1l42zp8","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2018-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:anddria-varnado","alpha:committee:columbia-banking-system-inc:audit-technology"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:7"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Anddria Varnado member of Audit; Technology, effective 2018-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:3fczei1kxy4lq","event_type":"DIRECTOR_APPOINTED","effective_at":"2017-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:randal-l-lund","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:15"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Randal L. Lund seat on COLUMBIA BANKING SYSTEM, INC., effective 2017-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1igk0804zv53u","event_type":"COMMITTEE_CREATED","effective_at":"2017-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:audit-chair-risk","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:15"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Audit · Chair; Risk committee of COLUMBIA BANKING SYSTEM, INC., effective 2017-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1sn6pjj12ay8i5","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2017-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:randal-l-lund","alpha:committee:columbia-banking-system-inc:audit-chair-risk"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:15"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Randal L. Lund member of Audit · Chair; Risk, effective 2017-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1gqv5r3171zsur","event_type":"DIRECTOR_APPOINTED","effective_at":"2015-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:john-f-schultz","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:12"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"John F. Schultz seat on COLUMBIA BANKING SYSTEM, INC., effective 2015-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:h42laz11je1q3","event_type":"COMMITTEE_CREATED","effective_at":"2015-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:audit-technology-chair","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:12"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Audit; Technology · Chair committee of COLUMBIA BANKING SYSTEM, INC., effective 2015-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:6m3wdbrhx0gl","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2015-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:john-f-schultz","alpha:committee:columbia-banking-system-inc:audit-technology-chair"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:12"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"John F. Schultz member of Audit; Technology · Chair, effective 2015-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:cxk6gu1qjml3o","event_type":"DIRECTOR_APPOINTED","effective_at":"2014-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:elizabeth-w-seaton","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:9"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Elizabeth W. Seaton seat on COLUMBIA BANKING SYSTEM, INC., effective 2014-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1d17xygj1low4","event_type":"DIRECTOR_APPOINTED","effective_at":"2014-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:mark-a-finkelstein","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:14"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Mark A. Finkelstein seat on COLUMBIA BANKING SYSTEM, INC., effective 2014-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:lknxuqvwzlzw","event_type":"COMMITTEE_CREATED","effective_at":"2014-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:audit-risk-chair","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:9"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Audit; Risk · Chair committee of COLUMBIA BANKING SYSTEM, INC., effective 2014-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:mantdngld4lj","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2014-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:elizabeth-w-seaton","alpha:committee:columbia-banking-system-inc:audit-risk-chair"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:9"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Elizabeth W. Seaton member of Audit; Risk · Chair, effective 2014-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:10yb8ku1dycpzs","event_type":"COMMITTEE_CREATED","effective_at":"2014-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:compensation-nominating-and-governance-technology","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:14"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Compensation; Nominating and Governance; Technology committee of COLUMBIA BANKING SYSTEM, INC., effective 2014-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:xlfhpd1xtdrh","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2014-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:mark-a-finkelstein","alpha:committee:columbia-banking-system-inc:compensation-nominating-and-governance-technology"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:14"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Mark A. Finkelstein member of Compensation; Nominating and Governance; Technology, effective 2014-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1h2ub60dm9jxw","event_type":"DIRECTOR_APPOINTED","effective_at":"2010-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:hilliard-c-terry-iii","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:10"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Hilliard C. Terry, III seat on COLUMBIA BANKING SYSTEM, INC., effective 2010-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:1g5blau1xo3uk0","event_type":"COMMITTEE_CREATED","effective_at":"2010-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:committee:columbia-banking-system-inc:compensation-chair-nominating-and-governance-technology","alpha:company:4888ddea-ffb6-4639-8bad-75059baadaac"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:10"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Compensation · Chair; Nominating and Governance; Technology committee of COLUMBIA BANKING SYSTEM, INC., effective 2010-01-01.","derivation":"temporal_relationship_change"},{"event_id":"alpha:event:transition:da4f9lul9mhl","event_type":"COMMITTEE_MEMBER_ADDED","effective_at":"2010-01-01","detected_at":"2026-10-16T04:45:39.548171+00:00","subject_ids":["alpha:person:hilliard-c-terry-iii","alpha:committee:columbia-banking-system-inc:compensation-chair-nominating-and-governance-technology"],"caused_claim_ids":["alpha:claim:company:4888ddea-ffb6-4639-8bad-75059baadaac:leadership_role:10"],"evidence_ids":["alpha:projection-evidence:document:32d65cbb8585597c91380974f39b2230a8b6264e12204f59e029e90e86f32754"],"summary":"Hilliard C. 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