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COLB · Columbia Banking System, Inc.

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$30.84 -0.23 (-0.74%) At close · Aug 20
Market Cap
$8.94B
Shares
282.90M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 553
Total Value: $8,628,426,667
Total Shares: 269,217,692

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 553 13F filers · Δ vs Mar 31, 2026
Top Holder
10.2%
Sep 2023 → Jun 2026 · range 9.7% – 11.8%
+0.5 pts
Top 5
31.1%
Sep 2023 → Jun 2026 · range 30.9% – 38.1%
+0.2 pts
Top 10
50.9%
Sep 2023 → Jun 2026 · range 50.7% – 54.7%
+0.2 pts
HHI
339
Sep 2023 → Jun 2026 · range 336 – 429
Broadly held+3

Quarterly Activity

vs Mar 31, 2026
New
84
Increased
180
Decreased
202
Sold Out
59
Unchanged
87
Holder count: +25
Institutional value: +13.3%
Shares held: -3.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 558
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 887343 CUSIP 197236102 13F (30d) 496 filings 471 filers Visit website Investor relations