COLB
Columbia Banking System, Inc.Company with tickers: COLB
CIK
887343
CUSIP
197236102
Shares Outstanding
289,490,366
13F Activity (30d)
297 filings
274 filers
Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.
Off-Exchange Volume History
| Week Start | ATS Volume | Non-ATS OTC Volume | Total Off-Exchange | % of FINRA Weekly Volume |
|---|---|---|---|---|
| 2026-05-18 | 2,142,116 | 1,011,964 | 3,154,080 | 30.7% |
| 2026-05-11 | 3,281,403 | 3,565,578 | 6,846,981 | 48.1% |
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