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Columbia Banking System, Inc. (COLB) institutional ownership

Latest close $31.27 Jul 31, 2026
Market cap$5.4B 52-week range SectorFinancial Services
Funds holding · Q1 2026
465
reported COLB position changes
Top owners · Q2 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
258 buyers · 207 sellers

Columbia Banking System, Inc. (COLB) price and institutional activity

Dates

Q1 2026

$0 bought by 258 investors
Vaughan Nelson Investment Management, L.P.Mackenzie Financial Corp +256 more
$0 sold by 207 investors
North Reef Capital Management LPNorges +205 more
Bought Sold Totals per quarter; hover a bar for the names.

Columbia Banking System, Inc. (COLB) institutional activity · 258

Investor Type Est. change Change Δ Own Date
Vaughan Nelson Investment Management, L.P. · New
Change +1.2M Date Q1 2026
Vaughan Nelson Investment Management, L.P. New· Q1 2026 +1.2M Q1 2026
Mackenzie Financial Corp · New
Change +1.1M Date Q1 2026
Mackenzie Financial Corp New· Q1 2026 +1.1M Q1 2026
Algebris (uk) Ltd · New
Change +867K Date Q1 2026
Algebris (uk) Ltd New· Q1 2026 +867K Q1 2026
Citadel Advisors LLC Added· Q1 2026 +535K +20.3% Q1 2026
Lighthouse Investment Partners, LLC · Added
Change +500K Date Q1 2026
Lighthouse Investment Partners, LLC Added· Q1 2026 +500K Q1 2026
Stifel Financial Corp · Added
Change +474K Date Q1 2026
Stifel Financial Corp Added· Q1 2026 +474K Q1 2026
Dimensional · Added
Change +408K Date Q1 2026
Dimensional Added· Q1 2026 +408K Q1 2026
Interval Partners, LP · New
Change +360K Date Q1 2026
Interval Partners, LP New· Q1 2026 +360K Q1 2026
BlackRock · Added
Change +346K Date Q1 2026
BlackRock Added· Q1 2026 +346K Q1 2026
Susquehanna International Group, LLP · Added
Change +339K Date Q1 2026
Susquehanna International Group, LLP Added· Q1 2026 +339K Q1 2026
Huntington National Bank · Added
Change +325K Date Q1 2026
Huntington National Bank Added· Q1 2026 +325K Q1 2026
T. Rowe Price Associates · Added
Change +307K Date Q1 2026
T. Rowe Price Associates Added· Q1 2026 +307K Q1 2026
Millennium Management LLC · Added
Change +306K Date Q1 2026
Millennium Management LLC Added· Q1 2026 +306K Q1 2026
American Century Companies Inc · Added
Change +295K Date Q1 2026
American Century Companies Inc Added· Q1 2026 +295K Q1 2026
Bank of America Corp · Added
Change +295K Date Q1 2026
Bank of America Corp Added· Q1 2026 +295K Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 258

Famous investor activity in Columbia Banking System, Inc. (COLB)

Columbia Banking System, Inc. (COLB) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Deer Aaron James · Officer Buy +$22K
Price $25.37 Qty +886 Owned 43K ΔOwn +2.1% Trade date Jun 30, 2026 Filed date Jul 2, 2026
Deer Aaron James Officer Buy $25.37 +886 +$22K 43K +2.1% Jun 30, 2026 Jul 2, 2026
Machuca Luis · Director Grant (A) $18K
Price $31.78 Qty 563 Owned 49K Trade date Jun 15, 2026 Filed date Jun 16, 2026
Machuca Luis Director Grant (A) $31.78 563 $18K 49K Jun 15, 2026 Jun 16, 2026
Moore Devine David · Officer 2 operations −$115K
Price $29.77 Qty −4K Owned 19K Trade date Jun 8, 2026 Filed date Jun 10, 2026
Moore Devine David Officer 2 operations $29.77 −4K −$115K 19K Jun 8, 2026 Jun 10, 2026
Varnado Anddria · Director Grant (A) 4K
Owned 31K Trade date May 14, 2026 Filed date May 18, 2026
Varnado Anddria Director Grant (A) 4K 31K May 14, 2026 May 18, 2026
Terry Hilliard C. III · Director Grant (A) 4K
Owned 56K Trade date May 14, 2026 Filed date May 18, 2026
Terry Hilliard C. III Director Grant (A) 4K 56K May 14, 2026 May 18, 2026
Studenmund Jaynie M. · Director Grant (A) 4K
Owned 22K Trade date May 14, 2026 Filed date May 18, 2026
Studenmund Jaynie M. Director Grant (A) 4K 22K May 14, 2026 May 18, 2026
Seaton Elizabeth Whitehead · Director Grant (A) 4K
Owned 4K Trade date May 14, 2026 Filed date May 18, 2026
Seaton Elizabeth Whitehead Director Grant (A) 4K 4K May 14, 2026 May 18, 2026
Schultz John F. · Director Grant (A) 4K
Owned 50K Trade date May 14, 2026 Filed date May 18, 2026
Schultz John F. Director Grant (A) 4K 50K May 14, 2026 May 18, 2026
Mitchell M. Christian · Director Grant (A) 4K
Owned 42K Trade date May 14, 2026 Filed date May 18, 2026
Mitchell M. Christian Director Grant (A) 4K 42K May 14, 2026 May 18, 2026
Machuca Luis · Director Grant (A) 4K
Owned 30K Trade date May 14, 2026 Filed date May 18, 2026
Machuca Luis Director Grant (A) 4K 30K May 14, 2026 May 18, 2026
Lund Randal Lee · Director Grant (A) 4K
Owned 28K Trade date May 14, 2026 Filed date May 18, 2026
Lund Randal Lee Director Grant (A) 4K 28K May 14, 2026 May 18, 2026
Forrest Eric · Director Grant (A) 4K
Owned 36K Trade date May 14, 2026 Filed date May 18, 2026
Forrest Eric Director Grant (A) 4K 36K May 14, 2026 May 18, 2026
Finkelstein Mark A. · Director Grant (A) 4K
Owned 36K Trade date May 14, 2026 Filed date May 18, 2026
Finkelstein Mark A. Director Grant (A) 4K 36K May 14, 2026 May 18, 2026
Lakely Brock · Officer Tax withholding or exercise payment (F) -$12K
Price $29.10 Qty -396 Owned 11K Trade date Apr 15, 2026 Filed date Apr 16, 2026
Lakely Brock Officer Tax withholding or exercise payment (F) $29.10 -396 -$12K 11K Apr 15, 2026 Apr 16, 2026
Machuca Luis · Director Grant (A) $18K
Price $26.83 Qty 659 Owned 48K Trade date Mar 16, 2026 Filed date Mar 17, 2026
Machuca Luis Director Grant (A) $26.83 659 $18K 48K Mar 16, 2026 Mar 17, 2026
15 of 114
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Columbia Banking System, Inc. (COLB) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Vanguard Group Inc 21.8M
% of shares outstanding 10.4% Filing date Feb 13, 2024
Vanguard Group Inc 21.8M 10.4% Feb 13, 2024
BlackRock Inc. 18.5M
% of shares outstanding 8.9% Filing date Jan 25, 2024
BlackRock Inc. 18.5M 8.9% Jan 25, 2024
T. Rowe Price Investment Management, Inc. 12.6M
% of shares outstanding 6.0% Filing date Nov 14, 2024
T. Rowe Price Investment Management, Inc. 12.6M 6.0% Nov 14, 2024
Vanguard Capital Management LLC 15.5M
% of shares outstanding 5.2% Filing date Apr 29, 2026
Vanguard Capital Management LLC 15.5M 5.2% Apr 29, 2026
State Street Corp
% of shares outstanding 4.5% Filing date Jan 22, 2024
State Street Corp 4.5% Jan 22, 2024
Franklin Mutual Advisers LLC 7.8M
% of shares outstanding 3.7% Filing date Jan 30, 2024
Franklin Mutual Advisers LLC 7.8M 3.7% Jan 30, 2024
T. Rowe Price Associates 3.0M
% of shares outstanding 3.7% Filing date Feb 14, 2022
T. Rowe Price Associates 3.0M 3.7% Feb 14, 2022
Dimensional Fund Advisors LP 3.0M
% of shares outstanding 1.4% Filing date Feb 9, 2024
Dimensional Fund Advisors LP 3.0M 1.4% Feb 9, 2024
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Columbia Banking System, Inc. (COLB) ownership FAQ

Who owns COLB?

465 reporting institutions disclosed COLB position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.