Welcome to our dedicated page for Columbia Bank SEC filings (Ticker: COLB), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The Columbia Banking System, Inc. (COLB) SEC filings page on Stock Titan provides direct access to the company’s regulatory disclosures as filed with the U.S. Securities and Exchange Commission. Columbia is a Washington‑incorporated bank holding company whose common stock trades on The Nasdaq Stock Market LLC under the symbol COLB, and its filings offer detailed insight into the operations of Columbia Bank and related subsidiaries.
Investors can use this page to locate current reports on Form 8‑K, which Columbia files to report material events. Recent 8‑Ks describe items such as quarterly and annual earnings releases, authorization of cash dividends, approval of a common stock repurchase program, completion of the all‑stock acquisition of Pacific Premier Bancorp, Inc., and regulatory approvals for that transaction. Other 8‑Ks document leadership and governance changes, including the appointment of executive officers like the Chief Financial Officer and Chief Accounting Officer, transitions of existing executives into advisory roles, and the addition of former Pacific Premier directors to Columbia’s Board of Directors and its committees.
Filings related to the Pacific Premier acquisition, including the initial Form 8‑K and subsequent Form 8‑K/A amendments, provide detail on the merger structure, exchange ratio, treatment of equity awards, and pro forma financial information for the combined company. Additional 8‑K items reference joint press releases, consulting agreements, and regulatory approvals from banking authorities that were required to complete the transaction.
On Stock Titan, these SEC filings are supplemented with AI‑powered summaries designed to highlight the key points of each document, such as the nature of a reported event, its potential impact on Columbia’s capital, governance or operations, and any notable terms in attached exhibits. Users can quickly scan high‑level explanations of earnings‑related 8‑Ks, dividend and buyback announcements, merger disclosures, and executive compensation or transition agreements, while retaining the ability to review the full text of each filing for comprehensive analysis.
COLUMBIA BANKING SYSTEM, INC. Chair, President and CEO Clint Stein reported a tax-related share disposition under a Form 4. On March 1, 2026, 9,789 shares of common stock were disposed of at $28.45 per share to satisfy tax withholding obligations. After this transaction, Stein’s directly held common stock totaled 140,564 shares.
COLUMBIA BANKING SYSTEM, INC. executive Andrew H. Ognall reported a tax-related share disposition on Common Stock. An automatic tax-withholding transaction disposed of 1,304 shares at $28.45 per share, leaving 72,702 shares held directly and 2,635 shares held indirectly through a 401(k) plan.
Columbia Banking System Senior Executive VP Torran B. Nixon reported a tax-related share disposition. On Common Stock, 2,980 shares were withheld at $28.45 per share to cover taxes, a non-open-market transaction coded as a tax-withholding disposition.
After this event, Nixon directly held 102,710 common shares. Indirectly, 3,650 shares were held by a family trust and 1,876 shares were held through a 401(k) account, reflecting total reported beneficial ownership across direct and indirect accounts.
Columbia Banking System reported an insider equity transaction involving EVP Chief Credit Officer Frank Namdar. On March 1, 2026, Namdar had 1,808 shares of common stock disposed of at $28.45 per share as a tax-withholding disposition, rather than an open-market sale. After this transaction, he directly owned 30,470 common shares. The filing also notes an additional 4,146 shares held indirectly through a 401(k) plan, reflecting retirement-related ownership separate from his direct holdings.
Columbia Banking System Senior Executive VP Christopher Merrywell reported a tax-withholding disposition of 3,230 shares of common stock at $28.45 per share. This Form 4 event reflects shares withheld to satisfy tax obligations rather than an open-market sale. After the transaction, he directly owned 41,027 common shares.
Columbia Banking System EVP and Chief Accounting Officer Lakely Brock reported a tax-related share disposition. On this Form 4, Brock transferred 391 shares of common stock on March 1, 2026 at $28.45 per share to cover tax liabilities, a non-open-market transaction coded as a tax-withholding disposition. After this transaction, Brock directly owns 10,469 common shares.
Columbia Banking System executive reports tax-related share transfer. EVP and Chief Marketing Officer David Moore Devine disposed of 838 shares of common stock on March 1, 2026 in a transaction coded “F,” which represents a tax-withholding disposition rather than an open-market sale. The shares were valued at $28.45 per share. After this transaction, he directly owned 21,944 common shares.
COLUMBIA BANKING SYSTEM, INC. executive Aaron James Deer, EVP Chief Strategy/Innovation Officer, reported a tax-related share disposition. On March 1, 2026, he transferred 918 shares of common stock at $28.45 per share as a tax-withholding disposition, classified under code F. After this transaction, he directly owned 40,925 shares of common stock.
Columbia Banking System executive reports tax-related share disposition
COLUMBIA BANKING SYSTEM, INC. executive officer Kumi Yamamoto Baruffi, EVP General Counsel and Corporate Secretary, reported a tax-withholding disposition of 1,799 shares of common stock at $28.45 per share. After this tax-related transaction, she directly holds 52,271 shares of Columbia Banking System common stock.
Columbia Banking System executive Drew K. Anderson reported a tax-related share disposition under a Form 4. On the transaction date, 1,808 shares of common stock were delivered at $28.45 per share to satisfy a tax obligation, leaving 20,678 common shares held directly after the transaction.