Columbia Banking System COLB Insider Ownership

NASDAQ COLB

$28.33 -0.11 (-0.39%)

At close: Oct 19, 2026 · 4:00 PM EDT

Insider Holdings by Owner

2.10Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

0.670%

▼-0.084% pp QoQ

Shares Held by Insiders

1.91Mn

filed for Sep 2026

▼-11.09% QoQ

Shares Outstanding

285.56Mn

285,558,000 shares

Direct Holdings

1.57Mn

Indirect: 342.06K

Net Shares Traded (QoQ)

-238.88K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 11, 2026

Across the past 12 months, open-market trades by Columbia Banking System insiders totaled $22,478 in purchases (886 shares) and $677,260 in sales (23.23K shares).

Behind Columbia Banking System's open-market trades in the past 12 months were one insider buying and 5 insiders selling.
Among COLB insiders, Aaron James Deer (EVP Chief Strategy/Innov Officer) bought the most stock on the open market in the past 12 months: $22,478 (886 shares), most recently on June 30, 2026.
Meanwhile, the largest open-market sales of COLB in the past 12 months were by Steven R. Gardner (Director), totaling $403,927 (13.72K shares), most recently on January 30, 2026.
In transactions other than open-market trades, Columbia Banking System insiders received 108.66K shares in stock awards, acquired 36.64K shares through option exercises and conversions and gave up 121.82K shares to cover taxes or exercise prices over the past 12 months.
Business Quant data shows Columbia Banking System insiders holding 1.91Mn shares in total in their latest Form 4 filings, down 14.24% from 2.23Mn shares at the end of Q3 2025.
Indirect holdings, through trusts, partnerships, family members and other entities, make up 17.87% (342.06K shares) of Columbia Banking System's insider total, with the other 82.13% (1.57Mn shares) held directly.
COLB's insider total is spread across 29 insiders who have filed a Form 4 in the past two years.
Columbia Banking System's three biggest insider holders are Cort L. O'Haver (Executive Chairman, 390.82K shares), Steven R. Gardner (Director, 340.8K shares) and Clint Stein (Chair, CEO, President, 151.58K shares), based on their latest Form 4 filings.
Of the shares held by COLB insiders, 20.41% belong to Cort L. O'Haver.
Institutional investors held 94.27% of Columbia Banking System stock at the end of Q2 2026, while the latest Form 4 filings of its insiders account for about 0.67%; other investors, including the public, hold roughly 5.06%.
In the past year, 24 insiders of Columbia Banking System submitted 85 Form 4 filings reporting trades, awards or other transactions.
These insider figures for Columbia Banking System are based on Form 4 filings through September 15, 2026.

Form 4 Holdings

Insiders Holding COLB

Insiders 40

Shares held 2.10Mn

Of outstanding 0.737%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Cort L O'Haver	Executive Chairman	390,824	390,824	18.6%	04 Mar, 2025
2	Clint Stein	Chair, Ceo, President	151,584	151,584	7.2%	17 Mar, 2026
3	Ron L Farnsworth	Chief Financial Officer	141,162	141,162	6.7%	04 Mar, 2025
4	Torran B Nixon	Senior Executive Vp	101,240	101,240	4.8%	17 Mar, 2026
5	Kumi Yamamoto Baruffi	Evp General Counsel, Corp Sec	96,879	96,879	4.6%	20 Mar, 2026
6	Christopher Merrywell	Senior Executive Vp	91,991	91,991	4.4%	17 Mar, 2026
7	Aaron James Deer	Evp Chief Strategy/Innov Offcr	78,051	78,051	3.7%	02 Jul, 2026
8	Andrew H Ognall	Evp Chief Risk Officer	74,132	74,132	3.5%	17 Mar, 2026
9	Lisa Dow	Chief Risk Officer	64,381	64,381	3.1%	04 Mar, 2025
10	Craig D Eerkes	Director	57,311	57,311	2.7%	14 May, 2024
11	Hilliard C. Iii Terry	Director	55,514	55,514	2.6%	18 May, 2026
12	Mark A Finkelstein	Director	51,194	51,194	2.4%	18 May, 2026
13	John F Schultz	Director	50,384	50,384	2.4%	18 May, 2026
14	Andy Mcdonald	Evp Chief Credit Officer	49,686	49,686	2.4%	02 Mar, 2023
15	Maria M Pope	Director	47,569	47,569	2.3%	16 May, 2025
16	Ford Elsaesser	Director	46,586	46,586	2.2%	23 Feb, 2023
17	Sheri Burns	Chief Human Resources Officer	42,488	42,488	2.0%	12 Mar, 2024
18	M Christian Mitchell	Director	41,909	41,909	2.0%	18 May, 2026
19	Randal Lee Lund	Director	39,136	39,136	1.9%	18 May, 2026
20	S Mae Fujita Numata	Director	38,338	38,338	1.8%	16 May, 2025
21	Devine David Moore	Evp Chief Marketing Officer	38,222	38,222	1.8%	10 Jun, 2026
22	Eric Forrest	Director	36,351	36,351	1.7%	18 May, 2026
23	Frank Namdar	Evp Chief Credit Officer	31,923	31,923	1.5%	17 Mar, 2026
24	Anddria Varnado	Director	30,894	30,894	1.5%	18 May, 2026
25	Luis Machuca	Director	29,953	29,953	1.4%	18 May, 2026
26	Eric J Eid	Evp Chief Digital Tech Off	29,243	29,243	1.4%	02 Mar, 2023
27	Lisa M White	Pao Corporate Controller	29,045	29,045	1.4%	04 Mar, 2025
28	David C Lawson	Evp Chief H.R. Officer	28,152	28,152	1.3%	02 Mar, 2023
29	Michelle Lantow	Director	23,140	23,140	1.1%	23 Feb, 2023
30	Drew K Anderson	Evp Chief Admin Officer	21,969	21,969	1.0%	17 Mar, 2026
31	Jaynie M Studenmund	Director	21,807	21,807	1.0%	18 May, 2026
32	Elizabeth Whitehead Seaton	Director	21,589	21,589	1.0%	18 May, 2026
33	Brock Lakely	Evp, Chief Accounting Officer	16,902	16,902	0.8%	16 Apr, 2026
34	Janine Terrano	Director	10,474	10,474	0.5%	23 Feb, 2023
35	Peggy Y Fowler	Director	8,211	8,211	0.4%	14 May, 2024
36	Laura Alvarez Schrag	Director	4,236	4,236	0.2%	23 Feb, 2023
37	Tracy Mack-Askew	Director	4,236	4,236	0.2%	23 Feb, 2023
38	Simone Lagomarsino	Director	2,670	2,670	0.1%	04 Sep, 2026
39	Steven R Gardner	Director	2,577	2,577	0.1%	08 Sep, 2026
40	Judi Giem	Evp Chro	1,750	1,750	0.1%	18 Aug, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

1,421 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
14 Sep, 2026	Luis Machuca	Director	Acquired A	594	$30.48	$18.11K	49,560	Indirect
04 Sep, 2026	Steven R Gardner	Director	Acquired A	2,577	$0.00	$0	2,577	Direct
02 Sep, 2026	Simone Lagomarsino	Director	Acquired A	2,670	$0.00	$0	2,670	Direct
14 Aug, 2026	Judi Giem	Evp Chro	Acquired M	2,393	$32.69	$78.23K	2,393	Direct
14 Aug, 2026	Judi Giem	Evp Chro	Disposed F	643	$32.69	$21.02K	1,750	Direct
14 Aug, 2026	Judi Giem	Evp Chro	Disposed M	2,393	—	—	13,108	Direct
30 Jun, 2026	Aaron James Deer	Evp Chief Strategy/Innov Offcr	Acquired P	886	$25.37	$22.48K	42,761	Direct
15 Jun, 2026	Luis Machuca	Director	Acquired A	563	$31.78	$17.89K	48,966	Indirect
08 Jun, 2026	Devine David Moore	Evp Chief Marketing Officer	Disposed S	60	$29.77	$1.79K	22,448	Direct
08 Jun, 2026	Devine David Moore	Evp Chief Marketing Officer	Disposed S	3,812	$29.78	$113.50K	18,636	Direct
14 May, 2026	John F Schultz	Director	Acquired A	3,949	$0.00	$0	50,384	Direct
14 May, 2026	Randal Lee Lund	Director	Acquired A	3,949	$0.00	$0	27,663	Direct
14 May, 2026	Jaynie M Studenmund	Director	Acquired A	3,949	$0.00	$0	21,807	Direct
14 May, 2026	Luis Machuca	Director	Acquired A	3,949	$0.00	$0	29,953	Direct
14 May, 2026	Anddria Varnado	Director	Acquired A	3,949	$0.00	$0	30,894	Direct
14 May, 2026	Eric Forrest	Director	Acquired A	3,949	$0.00	$0	36,351	Direct
14 May, 2026	Elizabeth Whitehead Seaton	Director	Acquired A	3,949	$0.00	$0	3,949	Direct
14 May, 2026	M Christian Mitchell	Director	Acquired A	3,949	$0.00	$0	41,909	Direct
14 May, 2026	Hilliard C. Iii Terry	Director	Acquired A	3,949	$0.00	$0	55,514	Direct
14 May, 2026	Mark A Finkelstein	Director	Acquired A	3,949	$0.00	$0	35,554	Direct

Showing 1 to 20 of 1,421 transactions