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COLBNasdaq
COLUMBIA BANKING SYSTEM, INC.
State Commercial Banks · WA · CIK 887343
COLUMBIA BANKING SYSTEM, INC. provides banking and financial services
$9.06B
Market cap
$31.99
Last close
-0.5%
1D
+3.6%
5D
2.6M
Volume
Price · last 39 sessions+10.0%
May 4L $28.59 · H $32.15Jun 29
239
Total filings
Jun 25, 2026
Last filing
12/31
Fiscal year end
11-K11-KJun 25, 20268-KCompany UpdateMay 15, 20268-KShareholder VoteMay 15, 202610-Q10-QMay 5, 20268-KResults of Operations · Reg FD DisclosureApr 23, 2026DEF 14ADEF 14AMar 31, 2026DEFA14ADEFA14AMar 31, 202611-K11-KMar 31, 20268-KReg FD DisclosureMar 31, 202610-K10-KFeb 26, 20268-KCompany UpdateFeb 13, 20268-KResults of Operations · Reg FD DisclosureJan 22, 20268-KReg FD DisclosureDec 31, 20258-KExecutive ChangeNov 21, 20258-KCompany UpdateNov 14, 202510-Q10-QNov 6, 20258-KExecutive Change · Reg FD DisclosureNov 4, 20258-KResults of Operations · Reg FD DisclosureOct 30, 20258-K/ACompany UpdateSep 3, 20258-KExecutive Change · Acquisition / DispositionSep 2, 20258-KReg FD DisclosureAug 29, 20258-KCompany UpdateAug 15, 202510-Q10-QAug 6, 20258-KReg FD Disclosure · Company UpdateAug 6, 20258-KResults of Operations · Reg FD DisclosureJul 24, 20258-KShareholder Vote · Reg FD DisclosureJul 22, 2025425425Jul 11, 20258-KCompany UpdateJul 11, 20258-KReg FD DisclosureJun 30, 202511-K11-KJun 27, 2025S-4S-4May 28, 20258-KCompany UpdateMay 16, 20258-KShareholder VoteMay 15, 202510-Q10-QMay 6, 2025425425May 6, 20258-KReg FD DisclosureMay 5, 2025425425Apr 25, 20258-KMaterial AgreementApr 25, 2025425425Apr 25, 2025425425Apr 24, 2025425425Apr 24, 2025425425Apr 24, 2025425425Apr 24, 2025425425Apr 24, 2025425425Apr 23, 20258-KReg FD Disclosure · Company UpdateApr 23, 20258-KResults of Operations · Reg FD DisclosureApr 23, 2025DEFA14ADEFA14AApr 3, 2025DEF 14ADEF 14AApr 3, 20258-KExecutive Change · Reg FD DisclosureApr 2, 202511-K11-KMar 31, 20258-KReg FD DisclosureMar 31, 20258-KReg FD DisclosureMar 27, 202510-K10-KFeb 25, 20258-KCompany UpdateFeb 14, 20258-KResults of Operations · Reg FD DisclosureJan 23, 20258-KReg FD DisclosureDec 31, 20248-KCompany UpdateNov 15, 2024SC 13GSC 13GNov 14, 202410-Q10-QNov 5, 20248-KResults of Operations · Reg FD DisclosureOct 24, 20248-KReg FD DisclosureSep 30, 20248-KCompany UpdateAug 12, 202410-Q10-QAug 6, 20248-KResults of Operations · Reg FD DisclosureJul 25, 20248-KReg FD DisclosureJun 28, 202411-K11-KJun 25, 20248-KCompany UpdateMay 13, 20248-KExecutive Change · Shareholder VoteMay 9, 202410-Q10-QMay 7, 20248-KResults of Operations · Reg FD DisclosureApr 25, 2024DEFA14ADEFA14AApr 8, 20248-KReg FD DisclosureApr 1, 2024DEFA14ADEFA14AMar 27, 2024DEF 14ADEF 14AMar 27, 20248-KReg FD DisclosureMar 5, 20248-KReg FD DisclosureMar 4, 202410-K10-KFeb 27, 20248-KCompany UpdateFeb 9, 20248-KResults of Operations · Reg FD DisclosureJan 24, 2024
Insider Activity
In the 90 days to Mar 13, 2026: 4 sold $562K.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 13, 2026 | Baruffi Kumi YamamotoEVP General Counsel, Corp Sec | Sell | 937 | $26.23 | $25K |
| Mar 13, 2026 | Lakely BrockEVP, Chief Accounting Officer | Sell | 211 | $26.23 | $6K |
| Mar 4, 2026 | Nixon Torran BSenior Executive VP | Sell | 2,240 | $28.85 | $65K |
| Mar 3, 2026 | Nixon Torran BSenior Executive VP | Sell | 2,241 | $28.25 | $63K |
| Jan 30, 2026 | Gardner Steven RDirector | Sell | 13,725 | $29.43 | $404K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
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