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COLB · Columbia Banking System, Inc. · Holdings

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$28.92 +0.19 (+0.66%) At close · Oct 2
Market Cap
$8.13B
Shares
282.90M
Volume · Oct 2 2.38M Avg daily vol (3M) 2.88M

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.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 560
Total Value: $8,640,359,992
Total Shares: 269,591,050
Showing 1–100 of 565 holdings by value · page 1 of 6

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 559 13F filers
Top Holder
10.2%
Sep 2023 → Jun 2026 · range 9.7% – 11.8%
of institutional value
Top 5
31.1%
Sep 2023 → Jun 2026 · range 30.9% – 38.1%
of institutional value
Top 10
50.8%
Sep 2023 → Jun 2026 · range 50.7% – 54.7%
of institutional value
HHI
338
Sep 2023 → Jun 2026 · range 336 – 429
Broadly held
Showing 100 of 565
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 887343 CUSIP 197236102 13F (30d) 13 filings 11 filers Visit website Investor relations