COLB — COLUMBIA BANKING SYSTEM, INC.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Dividends
Measured signals that fired on COLB
| date | signal | measured base rate |
|---|---|---|
| 2026-08-20 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-08-13 | Short volume far above its own normal short | -0.76% over 21 days · t = -2.79 · n = 5,897 statistically distinguishable from its control group |
| 2026-08-12 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-07-24 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-07-01 | Breakout to a 52-week high price | -1.00% over 21 days · t = -8.58 · n = 24,386 statistically distinguishable from its control group |
| 2026-06-09 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-08-14 | Giem Judi EVP CHRO | Option exercise | 2.4K | 32.69 | 78.2K |
| 2026-08-14 | Giem Judi EVP CHRO | Shares withheld for tax | 643 | 32.69 | 21.0K |
| 2026-06-30 | Deer Aaron James EVP Chief Strategy/Innov Offcr | Open-market purchase | 886 | 25.37 | 22.5K |
| 2026-06-08 | Moore Devine David EVP Chief Marketing Officer | Open-market sale | 3.8K | 29.77 | 113.5K |
| 2026-06-08 | Moore Devine David EVP Chief Marketing Officer | Open-market sale | 60 | 29.77 | 1.8K |
| 2026-05-14 | Varnado Anddria Director | Grant or award | 3.9K | 0.00 | 0 |
| 2026-05-14 | MITCHELL M CHRISTIAN Director | Grant or award | 3.9K | 0.00 | 0 |
| 2026-05-14 | STUDENMUND JAYNIE M Director | Grant or award | 3.9K | 0.00 | 0 |
| 2026-05-14 | MACHUCA LUIS Director | Grant or award | 3.9K | 0.00 | 0 |
| 2026-05-14 | SCHULTZ JOHN F Director | Grant or award | 3.9K | 0.00 | 0 |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 742.4M | 27.1M |
| WELLINGTON MANAGEMENT GROUP LLP | 409.9M | 14.9M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 393.3M | 14.3M |
| DIMENSIONAL FUND ADVISORS LP | 371.7M | 13.5M |
| VANGUARD CAPITAL MANAGEMENT LLC | 362.8M | 13.2M |
| STATE STREET CORP | 342.2M | 12.5M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 286.4M | 10.4M |
| AMERICAN CENTURY COMPANIES INC | 267.1M | 9.7M |
| Bank of New York Mellon Corp | 203.3M | 7.4M |
| FRANKLIN RESOURCES INC | 169.7M | 6.2M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 4 | 2026-08-18 | 2026-08-14 | on EDGAR ↗ |
| 8-K | 2026-08-14 | 2026-08-14 | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-08-13 | — | on EDGAR ↗ |
| 10-Q | 2026-08-04 | 2026-06-30 | on EDGAR ↗ |
| 8-K | 2026-07-30 | 2026-07-28 | on EDGAR ↗ |
| 8-K | 2026-07-23 | 2026-07-23 | on EDGAR ↗ |
| 4 | 2026-07-02 | 2026-06-30 | on EDGAR ↗ |
| 8-K | 2026-07-01 | 2026-06-30 | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Columbia Bank Continues Utah Expansion with New Draper Commercial Office and Retail Branch · 2026-08-18
- Columbia Bank Continues Utah Expansion with New Draper Commercial Office and Retail Branch · 2026-08-18
- COLUMBIA BANKING SYSTEM, INC. (COLB) filed form 4 · 2026-08-18 · SEC EDGAR
- Columbia Banking System, Inc. (COLB) filed form 8-K · 2026-08-14 · SEC EDGAR
- Columbia Banking System declares $0.37 dividend · 2026-08-14
- Columbia Banking System Announces $0.37 Per Common Share Dividend · 2026-08-14
Ask the AI about COLB
The assistant reads every block on this page — price history, filings, insider transactions, institutional positions, short volume, macro and the measured base rates — and says what it implies, quoting the number behind each claim and declaring what it does not have.
Everything on this page is live in the terminal.
Charts, filings, insider flow and the AI — open without an account.
Free plan for good. Pro is $69.99/mo, or $4.99 for a 7-day trial. See the plans →