8-K - COLUMBIA BANKING SYSTEM, INC. (0000887343) (Filer)
Published . Updated .
8-K - COLUMBIA BANKING SYSTEM filed an 8-K with the SEC on Oct 22 (a notice of a material company event).
Directly affected
- COLB Columbia Banking System-8.9%
Named in this report.
Indirectly affected
- SPY SPDR S&P 500+1.6%
The broad U.S. stock market
- TLT iShares 20+ Year Treasury Bond-1.8%
Long-term U.S. government bonds
- QQQ Invesco QQQ+2.3%
Large technology stocks
- GLD SPDR Gold Shares-3.3%
Gold can move with the broad market
Price reaction, T-5 to T+3
| Ticker | T-5 | T-3 | T-1 | T0 | T+1 | T+2 | T+3 |
|---|---|---|---|---|---|---|---|
| COLB | -4.84% | -2.95% | base | after close | after close | after close | after close |
| SPY | -0.09% | +0.66% | base | after close | after close | after close | after close |
| TLT | -2.07% | -1.97% | base | after close | after close | after close | after close |
| QQQ | +0.75% | +1.80% | base | after close | after close | after close | after close |
| GLD | +3.51% | +2.33% | base | after close | after close | after close | after close |
Closing-price change versus T-1, the last close before the story. T0 to T+3 fill in after each market close. Prices: Alpaca IEX.
Market Call
Think this story will push the stock up or down over the next three trading days? Make a free call and see what other readers think. Points are play money with no cash value.
Filed: 2026-10-22 AccNo: 0000887343-26-000184 Size: 9 MB Item 2.02: Results of Operations and Financial Condition Item 7.01: Regulation FD Disclosure Item 9.01: Financial Statements and Exhibits
Source: sec-edgar
Columbia Banking System (COLB) since this story, compared with the market
| Company | When | Move | Status |
|---|---|---|---|
| Columbia Banking System (COLB) | three days earlier | -2.95% | final price |
| Columbia Banking System (COLB) | five days earlier | -4.84% | final price |
| GLD | three days earlier | +2.33% | final price |
| GLD | five days earlier | +3.51% | final price |
| QQQ | three days earlier | +1.80% | final price |
| QQQ | five days earlier | +0.75% | final price |
| SPY | three days earlier | +0.66% | final price |
| SPY | five days earlier | -0.09% | final price |
| TLT | three days earlier | -1.97% | final price |
| TLT | five days earlier | -2.07% | final price |
Who gains and who loses around Columbia Banking System (COLB)
Companies mentioned with this story
- COLB Columbia Banking System
In “8-K - COLUMBIA BANKING SYSTEM, INC. (0000887343) (Filer),” Columbia Banking System (COLB) is linked, with no stored direction, high confidence. Reason on file: SEC 8-K filing -> direct issuer disclosure -> COLB
How “8-K - COLUMBIA BANKING SYSTEM, INC. (0000887343) (Filer)” reaches Columbia Banking System (COLB)
The 22 Oct 2026 story “8-K - COLUMBIA BANKING SYSTEM, INC. (0000887343) (Filer)” names Columbia Banking System (COLB) because of this story.
For Columbia Banking System (COLB), the reason on file says SEC 8-K filing -> direct issuer disclosure -> COLB
The price range for Columbia Banking System (COLB), and the dates in the story
COLB traded between 27.65 and 30.85 across 17 sessions. The latest close on file is 28.04.
How strong the case is around Columbia Banking System (COLB)
14 out of 100
“8-K - COLUMBIA BANKING SYSTEM, INC. (0000887343) (Filer)” scores 14 out of 100. The score uses 1 sources, and 1 linked companies.