Stocks
COLB COLUMBIA BANKING SYSTEM, INC.

COLB

COLUMBIA BANKING SYSTEM, INC.

Company with tickers: COLB

CIK

887343

CUSIP

197236102

Shares Outstanding

289,490,366

Price History Institutional Holders Short Volume Short Interest Fails to Deliver SEC Filings Earnings Calls Insider Trades Congressional Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-05-14	Forrest Eric	Director	Award	3,949	—	—	36,351
2026-05-14	Lund Randal Lee	Director	Award	3,949	—	—	27,663
2026-05-14	Lund Randal Lee	Director	Other	1,000	—	—	1,000
2026-05-14	MACHUCA LUIS	Director	Award	3,949	—	—	29,953
2026-05-14	MITCHELL M CHRISTIAN	Director	Award	3,949	—	—	41,909
2026-05-14	SCHULTZ JOHN F	EVP, COLO	Award	3,949	—	—	50,384
2026-05-14	SEATON ELIZABETH WHITEHEAD	Director	Award	3,949	—	—	3,949
2026-05-14	SEATON ELIZABETH WHITEHEAD	Director	Other	32,566	—	—	32,566
2026-05-14	Terry Hilliard C. III	Director	Award	3,949	—	—	55,514
2026-05-14	Finkelstein Mark A	Director	Award	3,949	—	—	35,554
2026-05-14	Varnado Anddria	Director	Award	3,949	—	—	30,894
2026-05-14	STUDENMUND JAYNIE M	Director	Award	3,949	—	—	21,807
2026-05-14	STUDENMUND JAYNIE M	Director	Other	3,843	—	—	3,843
2026-04-15	Lakely Brock	EVP, Chief Accounting Officer	Tax	396	$29.10	$11,524	10,708
2026-03-16	MACHUCA LUIS	Director	Award	659	$26.83	$17,681	48,403
2026-03-13	OGNALL ANDREW H	EVP Chief Risk Officer	Convert	2,381	—	—	53,026
2026-03-13	OGNALL ANDREW H	EVP Chief Risk Officer	Other	2,635	—	—	2,635
2026-03-13	OGNALL ANDREW H	EVP Chief Risk Officer	Tax	951	$26.23	$24,945	74,132
2026-03-13	OGNALL ANDREW H	EVP Chief Risk Officer	Convert	2,381	$26.23	$62,454	75,083
2026-03-13	Lakely Brock	EVP, Chief Accounting Officer	Convert	846	$26.23	$22,191	11,315
2026-03-13	Lakely Brock	EVP, Chief Accounting Officer	Convert	846	—	—	9,810
2026-03-13	Lakely Brock	EVP, Chief Accounting Officer	Sell	211	$26.23	$5,535	11,104
2026-03-13	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Tax	617	$26.23	$16,184	41,875
2026-03-13	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Convert	1,567	—	—	7,133
2026-03-13	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Convert	1,567	$26.23	$41,102	42,492
2026-03-13	Anderson Drew K	EVP Chief Admin Officer	Convert	2,506	—	—	50,607
2026-03-13	Anderson Drew K	EVP Chief Admin Officer	Tax	1,215	$26.23	$31,869	21,969
2026-03-13	Nixon Torran B	Senior Executive VP	Convert	5,013	—	—	49,052
2026-03-13	Nixon Torran B	Senior Executive VP	Other	1,910	—	—	1,910
2026-03-13	Nixon Torran B	Senior Executive VP	Tax	2,002	$26.23	$52,512	101,240
2026-03-13	Nixon Torran B	Senior Executive VP	Convert	5,013	$26.23	$131,491	103,242
2026-03-13	Nixon Torran B	Senior Executive VP	Other	3,650	—	—	3,650
2026-03-13	Namdar Frank	EVP Chief Credit Officer	Tax	1,367	$26.23	$35,856	31,923
2026-03-13	Namdar Frank	EVP Chief Credit Officer	Convert	2,820	$26.23	$73,969	33,290
2026-03-13	Namdar Frank	EVP Chief Credit Officer	Other	4,179	—	—	4,179
2026-03-13	Namdar Frank	EVP Chief Credit Officer	Convert	2,820	—	—	13,640
2026-03-13	Moore Devine David	EVP Chief Marketing Officer	Convert	940	$26.23	$24,656	22,884
2026-03-13	Moore Devine David	EVP Chief Marketing Officer	Convert	940	—	—	4,679
2026-03-13	Moore Devine David	EVP Chief Marketing Officer	Tax	376	$26.23	$9,862	22,508
2026-03-13	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Convert	2,381	—	—	13,083
2026-03-13	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Sell	937	$26.23	$24,578	53,715
2026-03-13	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Convert	2,381	$26.23	$62,454	54,652
2026-03-13	Stein Clint	Director, Chair, CEO, President	Tax	7,151	$26.23	$187,571	151,584
2026-03-13	Stein Clint	Director, Chair, CEO, President	Convert	18,171	—	—	166,984
2026-03-13	Stein Clint	Director, Chair, CEO, President	Convert	18,171	$26.23	$476,625	158,735
2026-03-13	Merrywell Christopher	Senior Executive VP	Convert	5,013	—	—	51,291
2026-03-13	Merrywell Christopher	Senior Executive VP	Tax	1,973	$26.23	$51,752	44,067
2026-03-13	Merrywell Christopher	Senior Executive VP	Convert	5,013	$26.23	$131,491	46,040
2026-03-13	Anderson Drew K	EVP Chief Admin Officer	Convert	2,506	$26.23	$65,732	23,184
2026-03-04	Nixon Torran B	Senior Executive VP	Sell	2,240	$28.85	$64,624	98,229
2026-03-03	Nixon Torran B	Senior Executive VP	Sell	2,241	$28.25	$63,308	100,469
2026-03-03	Nixon Torran B	Senior Executive VP	Other	1,876	—	—	1,876
2026-03-03	Nixon Torran B	Senior Executive VP	Other	3,650	—	—	3,650
2026-03-01	Stein Clint	Director, Chair, CEO, President	Tax	9,789	$28.45	$278,497	140,564
2026-03-01	Merrywell Christopher	Senior Executive VP	Tax	3,230	$28.45	$91,894	41,027
2026-03-01	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Tax	1,799	$28.45	$51,182	52,271
2026-03-01	OGNALL ANDREW H	EVP Chief Risk Officer	Tax	1,304	$28.45	$37,099	72,702
2026-03-01	OGNALL ANDREW H	EVP Chief Risk Officer	Other	2,635	—	—	2,635
2026-03-01	Nixon Torran B	Senior Executive VP	Other	3,650	—	—	3,650
2026-03-01	Nixon Torran B	Senior Executive VP	Tax	2,980	$28.45	$84,781	102,710
2026-03-01	Nixon Torran B	Senior Executive VP	Other	1,876	—	—	1,876
2026-03-01	Namdar Frank	EVP Chief Credit Officer	Other	4,146	—	—	4,146
2026-03-01	Namdar Frank	EVP Chief Credit Officer	Tax	1,808	$28.45	$51,438	30,470
2026-03-01	Lakely Brock	EVP, Chief Accounting Officer	Tax	391	$28.45	$11,124	10,469
2026-03-01	Moore Devine David	EVP Chief Marketing Officer	Tax	838	$28.45	$23,841	21,944
2026-03-01	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Tax	918	$28.45	$26,117	40,925
2026-03-01	Anderson Drew K	EVP Chief Admin Officer	Tax	1,808	$28.45	$51,438	20,678
2026-02-18	Nixon Torran B	Senior Executive VP	Award	16,645	$31.24	$519,990	54,065
2026-02-18	Namdar Frank	EVP Chief Credit Officer	Award	8,002	$31.24	$249,982	16,460
2026-02-18	Namdar Frank	EVP Chief Credit Officer	Other	2,917	—	—	2,917
2026-02-18	Moore Devine David	EVP Chief Marketing Officer	Award	2,800	$31.24	$87,472	5,619
2026-02-18	Lakely Brock	EVP, Chief Accounting Officer	Award	5,601	$31.24	$174,975	10,656
2026-02-18	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Award	8,322	$31.24	$259,979	15,464
2026-02-18	OGNALL ANDREW H	EVP Chief Risk Officer	Award	8,002	$31.24	$249,982	55,407
2026-02-18	Merrywell Christopher	Senior Executive VP	Award	16,645	$31.24	$519,990	56,304
2026-02-18	Giem Judi	Chief Human Resources Officer	Award	8,322	$31.24	$259,979	15,501
2026-02-18	Stein Clint	Director, Chair, CEO, President	Award	56,017	$31.24	$1,749,971	185,155
2026-02-18	Seda Ivan A	EVP, Chief Financial Officer	Award	12,804	$31.24	$399,997	12,804
2026-02-18	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Award	4,001	$31.24	$124,991	8,700
2026-02-18	Anderson Drew K	EVP Chief Admin Officer	Award	8,002	$31.24	$249,982	53,113
2026-02-15	Nixon Torran B	Senior Executive VP	Tax	1,905	$31.49	$59,988	105,690
2026-02-15	Nixon Torran B	Senior Executive VP	Other	1,869	—	—	1,869
2026-02-15	Anderson Drew K	EVP Chief Admin Officer	Tax	788	$31.49	$24,814	22,486
2026-02-15	Stein Clint	Director, Chair, CEO, President	Tax	3,922	$31.49	$123,504	150,353
2026-02-15	OGNALL ANDREW H	EVP Chief Risk Officer	Other	2,635	—	—	2,635
2026-02-15	OGNALL ANDREW H	EVP Chief Risk Officer	Tax	931	$31.49	$29,317	74,006
2026-02-15	Namdar Frank	EVP Chief Credit Officer	Other	4,126	—	—	4,126
2026-02-15	Namdar Frank	EVP Chief Credit Officer	Tax	1,169	$31.49	$36,812	32,278
2026-02-15	Moore Devine David	EVP Chief Marketing Officer	Tax	485	$31.49	$15,273	22,782
2026-02-15	Nixon Torran B	Senior Executive VP	Other	3,650	—	—	3,650
2026-02-15	Merrywell Christopher	Senior Executive VP	Tax	1,706	$31.49	$53,722	44,257
2026-02-15	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Tax	531	$31.49	$16,721	41,843
2026-02-15	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Tax	1,036	$31.49	$32,624	54,070
2026-02-04	MACHUCA LUIS	Director	Award	562	$31.12	$17,489	47,744
2026-02-02	Namdar Frank	EVP Chief Credit Officer	Other	4,113	—	—	4,113
2026-02-02	Namdar Frank	EVP Chief Credit Officer	Award	4,667	$29.69	$138,563	35,830
2026-02-02	Namdar Frank	EVP Chief Credit Officer	Tax	2,383	$29.69	$70,751	33,447
2026-02-02	Moore Devine David	EVP Chief Marketing Officer	Tax	965	$29.69	$28,651	23,267
2026-02-02	Moore Devine David	EVP Chief Marketing Officer	Award	2,095	$29.69	$62,201	24,232
2026-02-02	Merrywell Christopher	Senior Executive VP	Award	12,576	$29.69	$373,381	50,912