Columbia Banking System
COLB · NASDAQ
Who owns COLB
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 47.2% of COLB’s shares.
- BlackRock Institutional Trust Company, N.A.8.6%
- T. Rowe Price Investment Management, Inc.5.5%
- Dimensional Fund Advisors, L.P.4.9%
- Vanguard Portfolio Management, LLC4.8%
- Next 6 largest institutions23.3%
- All other shareholders52.8%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 24.20M | 8.55% |
| T. Rowe Price Investment Management, Inc. | 15.63M | 5.53% |
| Dimensional Fund Advisors, L.P. | 13.91M | 4.92% |
| Vanguard Portfolio Management, LLC | 13.68M | 4.84% |
| Vanguard Capital Management, LLC | 13.07M | 4.62% |
| State Street Investment Management (US) | 12.69M | 4.49% |
| Wellington Management Company, LLP | 11.69M | 4.13% |
| Charles Schwab Investment Management, Inc. | 11.03M | 3.90% |
| T. Rowe Price Associates, Inc. | 9.57M | 3.38% |
| American Century Investment Management, Inc. | 7.90M | 2.79% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 10.13M | 3.58% |
| Vanguard Total Stock Market Index Fund | 9.23M | 3.26% |
| Schwab U.S. Dividend Equity ETF | 7.91M | 2.80% |
| Vanguard Small-Cap Index Fund | 6.66M | 2.36% |
| T. Rowe Price Small Cap Value Fund | 5.75M | 2.03% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $22.48K (1 trade) and sold $115.29K (2 trades) of COLB on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| MACHUCA LUIS | Award | 594 | $18.11K |
| GARDNER STEVEN R | Award | 2.58K | — |
| LAGOMARSINO SIMONE | Award | 2.67K | — |
| Giem Judi | Option exercise | 2.39K | — |
| Giem Judi | Tax withholding | 643 | $21.02K |
| Giem Judi | Option exercise | 2.39K | $78.23K |
| Deer Aaron James | Buy | 886 | $22.48K |
| MACHUCA LUIS | Award | 563 | $17.89K |
| Moore Devine David | Sale | 3.81K | $113.50K |
| Moore Devine David | Sale | 60 | $1.79K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Josh GottheimerHouse | Sale | $1K–$15K | Mar 5, 2026 |
| Gil CisnerosHouse | Sale | $15K–$50K | Jan 15, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 11.06M
- Days to cover
- 3.89
- % of shares outstanding
- 3.91%
- Average daily volume
- 2.84M
- Change since last report
- +4.7%
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