COLB

COLUMBIA BANKING SYSTEM INC

COLB·197236102·US·Common Stock·Financial Services - Banks - Regional-13D/G

COLB (COLUMBIA BANKING SYSTEM INC) is held by 205 institutional investors as of Q2 2026. Largest holders: BlackRock, Inc. ($880.4M), DIMENSIONAL FUND ADVISORS LP ($445.7M), VANGUARD PORTFOLIO MANAGEMENT LLC ($438.4M). Net institutional sentiment: Mixed. In Q2 2026, 1 member of Congress and 96 funds bought COLB.

205
Holders
(16 Elite)
$6.8B
Total Value
48% (200)
Consensus
96 buying - 104 selling
13F: Insider & Congress: Updated regularly
COLB

Smart Money Verdict

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Held by 205 funds
16 elite

Who's Trading

Source dates: Price Aug 28, 2026 · Insiders Aug 18, 2026 · Activists Aug 13, 2026 · Congress Apr 8, 2026

InsiderGJGiem JudiTax 643 shAug 14, 2026
InsiderGJGiem JudiExercise 2K shAug 14, 2026
ActivistWellington Management Group LLPWellington Management Group LLP4.1%Aug 13, 2026
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Top Holders

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Fund
Action
Shares
Value
Weight
Est. P&L
Conviction
Increased
27.5M(+1.5%)$880.4M0.0%+22.73%
32
Increased
13.9M(+2.6%)$445.7M0.1%+33.56%
32
Decreased
13.7M(-4.6%)$438.4M0.0%+13.37%
0
Decreased
13.1M(-1.1%)$419M0.0%+13.37%
0
Increased
12.7M(+1.8%)$406.8M0.0%+32.52%
32
Decreased
11.7M(-21.8%)$374.6M0.1%+27.15%
0
Increased
11M(+5.6%)$353.4M0.0%+41.36%
33
Decreased
7.9M(-18.8%)$253.3M0.1%+49.80%
0
Decreased
6.1M(-1.4%)$195.6M0.0%+30.40%
0
Decreased
6M(-1.1%)$193M0.1%+60.90%
0
Decreased
5.8M(-1.2%)$185.8M0.0%+33.59%
0
Increased
4.7M(+14.4%)$150.2M0.0%+33.30%
35
Decreased
4M(-3.4%)$128.4M0.8%+40.78%
0
Decreased
3.8M(-22.1%)$122.3M0.0%+58.84%
0
Decreased
3.8M(-2.4%)$122M0.2%+12.63%
0
Decreased
3.8M(-49.1%)$120.9M0.0%+29.37%
0
Increased
3.2M(+179.9%)$101.8M0.1%+1.43%
58
Increased
3.1M(+24.2%)$100.8M0.6%+25.59%
51
Decreased
2.6M(-25.2%)$84.5M0.0%+28.37%
0
Decreased
2.6M(-0.1%)$83.7M0.0%+36.90%
0

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COLBCOLBCOLUMBIA BANKING SYSTEM INC

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Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer

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