COLUMBIA BANKING SYSTEM INC. (COLB) - Insider Holders & Insider Ownership

List of insiders holdings for COLUMBIA BANKING SYSTEM INC.:

Shares directly owned by the insider.
Shares indirectly owned by the insider.
Total shares owned by the insider (sum of shares directly and indirectly owned).
Total market value if available.
Shares are not adjusted for stock split.

"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#	Insider Holder Name	Report Date Time	Shares Owned Directly Indirectly	Total Shares Owned	Filing
1	GARDNER STEVEN R Director	2026-09-08 17:24:35	2,577 570,370	572,947	Form 4
2	Stein Clint Chair, CEO, President	2026-03-17 20:48:47	318,568 0	318,568	Form 4
3	O'HAVER CORT L Executive Chairman	2025-03-14 21:46:30	290,054 0	290,054	Form 4/A
4	WEYERHAEUSER WILLIAM T Director	2019-05-24 15:42:14	32,188 223,249	255,437	Form 4
5	Nixon Torran B Senior Executive VP	2026-03-17 20:43:18	150,292 5,560	155,852	Form 4
6	DRESSEL MELANIE J President and CEO	2016-07-05 16:57:52	84,114 62,678	146,792	Form 4
7	OGNALL ANDREW H EVP Chief Risk Officer	2026-03-17 20:45:59	127,158 2,635	129,793	Form 4
8	FARNSWORTH RON L Chief Financial Officer	2025-03-14 21:53:43	117,641 0	117,641	Form 4/A
9	Merrywell Christopher Senior Executive VP	2026-03-17 20:33:52	95,358 0	95,358	Form 4
10	FOWLER PEGGY Y Director	2024-05-14 17:26:20	8,211 67,211	75,422	Form 4
11	MATSON TOM SR Director	2012-09-26 14:51:22	75,259 0	75,259	Form 4
12	Anderson Drew K EVP Chief Admin Officer	2026-03-17 20:24:10	72,576 0	72,576	Form 4
13	HULBERT TOM Director	2022-05-05 14:04:23	69,990 0	69,990	Form 4/A
14	WHITNEY EVANS Q Executive Vice President	2007-01-10 19:49:12	50,439 7,546	57,985	Form 4
15	Terry Hilliard C. III Director	2026-05-18 17:17:04	55,514 0	55,514	Form 4
16	BARUFFI KUMI YAMAMOTO EVP General Counsel, Corp Sec	2026-03-20 19:26:53	53,715 0	53,715	Form 4/A
17	SCHULTZ JOHN F Director	2026-05-18 17:13:25	50,384 0	50,384	Form 4
18	Namdar Frank EVP Chief Credit Officer	2026-03-17 20:39:19	45,563 4,179	49,742	Form 4
19	McDonald Andy EVP Chief Credit Officer	2023-03-02 19:37:45	49,686 0	49,686	Form 4
20	MACHUCA LUIS Director	2026-09-15 16:55:01	0 49,560	49,560	Form 4
21	FOLSOM JOHN Director	2019-05-24 15:24:08	36,779 11,550	48,329	Form 4
22	Robbins Hadley S PRESIDENT & CEO	2020-01-03 13:42:28	47,943 0	47,943	Form 4
23	POPE MARIA M Director	2025-05-16 21:53:06	47,569 0	47,569	Form 4
24	SCHMINKEY GARY R EVP and CFO	2012-02-24 17:42:54	34,920 8,138	43,058	Form 4
25	Deer Aaron James EVP Chief Strategy/Innov Offcr	2026-07-02 17:17:10	42,761 0	42,761	Form 4
26	Burns Sheri Chief Human Resources Officer	2024-03-12 17:29:55	42,488 0	42,488	Form 4
27	MITCHELL M CHRISTIAN Director	2026-05-18 17:10:47	41,909 0	41,909	Form 4
28	WILL JAMES M Director	2014-06-27 14:26:46	36,137 1,400	37,537	Form 4
29	Numata S Mae Fujita Director	2025-05-16 21:52:12	37,113 0	37,113	Form 4
30	SEATON ELIZABETH WHITEHEAD Director	2026-05-18 17:14:31	3,949 32,566	36,515	Form 4
31	Forrest Eric Director	2026-05-18 16:31:49	36,351 0	36,351	Form 4
32	LAGOMARSINO SIMONE Director	2026-09-04 16:41:52	2,670 32,938	35,608	Form 4
33	Finkelstein Mark A Director	2026-05-18 16:30:47	35,554 0	35,554	Form 4
34	EERKES CRAIG D Director	2024-05-14 17:03:32	35,346 0	35,346	Form 4
35	Dow Lisa Chief Risk Officer	2025-03-04 16:06:26	35,110 0	35,110	Form 4
36	NELSON MARK W Executive Vice President	2013-10-02 19:52:03	34,217 0	34,217	Form 4
37	RUSSELL HARALD R Executive Vice President	2004-01-07 17:59:29	28,208 4,803	33,011	Form 4
38	Roberts Kent Executive Vice President	2013-07-02 17:54:37	23,590 9,377	32,967	Form 4
39	RODMAN DONALD Director	2012-09-26 15:01:34	15,873 15,567	31,440	Form 4
40	Varnado Anddria Director	2026-05-18 17:18:03	30,894 0	30,894	Form 4
41	Eid Eric J EVP Chief Digital & Tech Off	2023-03-02 18:11:02	29,243 0	29,243	Form 4
42	White Lisa M PAO & Corporate Controller	2025-03-04 16:33:44	29,045 0	29,045	Form 4
43	Lund Randal Lee Director	2026-05-18 17:09:01	27,663 1000	28,663	Form 4
44	Lawson David C EVP Chief H.R. Officer	2023-03-02 18:09:36	28,152 0	28,152	Form 4
45	STUDENMUND JAYNIE M Director	2026-05-18 17:16:20	21,807 3,843	25,650	Form 4
46	GOLDBERG FREDERICK M Director	2014-06-27 14:22:34	19,750 4,594	24,344	Form 4
47	COLUMBIA BANKING SYSTEM INC. EVP, Chief Accounting Officer	2025-12-01 17:40:33	22,227 0	22,227	Form 3
48	REGIS DANIEL C Director	2014-06-27 14:33:08	20,500 0	20,500	Form 4
49	Moore Devine David EVP Chief Marketing Officer	2026-06-10 16:52:47	18,636 0	18,636	Form 4
50	Giem Judi EVP CHRO	2026-08-18 16:50:51	14,858 0	14,858	Form 4
51	Ray Barry SVP & CAO	2018-03-02 18:36:49	13,108 0	13,108	Form 4
52	Seda Ivan A EVP, Chief Financial Officer	2026-02-20 19:45:11	12,804 0	12,804	Form 4
53	Dietzler David A Director	2019-05-24 15:19:35	12,303 0	12,303	Form 4
54	Lakely Brock EVP, Chief Accounting Officer	2026-04-16 17:31:50	10,708 0	10,708	Form 4
55	Sigrist Greg EVP & CFO	2020-03-03 18:57:57	8,126 0	8,126	Form 4
56	Terrano Janine Director	2023-03-01 16:35:04	0 0	0	Form 4
57	Elsaesser Ford Director	2023-03-01 16:33:59	0 0	0	Form 4
58	Lantow Michelle Director	2023-03-01 16:35:30	0 0	0	Form 4
59	Mack-Askew Tracy Director	2023-03-01 16:34:24	0 0	0	Form 4
60	Schrag Laura Alvarez Director	2023-03-01 16:36:22	0 0	0	Form 4