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 EVP and Chief Credit Officer Frank Namdar exercised restricted stock units into common shares. On March 13, 2026, 2,820 Restricted Stock Units converted into 2,820 shares of Common Stock, with the common stock valued at $26.23 per share in this transaction.
To cover tax obligations, 1,367 Common Stock shares were withheld, a non-market disposition that does not represent an open-market sale. After these transactions, Namdar directly held 31,923 Common Stock shares and indirectly held 4,179 shares through a 401(k) plan. The footnotes note that 8,458 Restricted Stock Units were originally granted on February 25, 2025, vesting in three annual installments beginning March 13, 2026.
COLUMBIA BANKING SYSTEM, INC. executive David Devine Moore, EVP Chief Marketing Officer, exercised Restricted Stock Units that converted into 940 shares of common stock on March 13, 2026. These RSUs were part of a 2,819-unit grant made on February 25, 2025 that vests in three annual installments beginning March 13, 2026.
Of the 940 common shares received, 376 shares were disposed of to cover tax liabilities through share withholding at a reference price of $26.23 per share. After these transactions, Moore directly holds 22,508 shares of common stock and 4,679 Restricted Stock Units.
Columbia Banking System Senior Executive VP Christopher Merrywell exercised 5,013 Restricted Stock Units into common stock on March 13, 2026. The units converted one-for-one into shares, valued at $26.23 per share for this transaction. To cover tax obligations, 1,973 shares were withheld, leaving him with 44,067 common shares directly owned after the transactions.
Columbia Banking System EVP and Chief Accounting Officer Lakely Brock exercised restricted stock units and sold a small portion of the resulting shares. On March 13, 2026, 846 Restricted Stock Units converted into 846 shares of common stock on a one-for-one basis. The common shares were acquired at $26.23 per share, then 211 shares were sold at $26.23 per share. After these transactions, Brock directly owned 11,104 shares of common stock. According to a prior grant dated February 25, 2025, 2,537 Restricted Stock Units vest in three annual installments beginning March 13, 2026.
COLUMBIA BANKING SYSTEM EVP and General Counsel Kumi Yamamoto Baruffi exercised restricted stock units and sold a portion of the resulting shares. On March 13, 2026, 2,381 Restricted Stock Units were converted into 2,381 shares of common stock at an effective price of $0.00 per share. On the same date, 937 common shares were sold at $26.23 per share, leaving 53,715 common shares held directly after the sale. A prior grant of 7,142 Restricted Stock Units made on February 25, 2025 vests in three annual installments beginning March 13, 2026.
COLUMBIA BANKING SYSTEM, INC. executive Drew K. Anderson, EVP Chief Admin Officer, exercised 2,506 Restricted Stock Units into the same number of common shares on March 13, 2026. The RSUs convert to common stock on a one-for-one basis.
To cover tax obligations, 1,215 common shares were withheld at $26.23 per share, a non-market disposition rather than an open-market sale. After these transactions, Anderson directly holds 21,969 common shares. A prior grant of 7,518 RSUs vests in three annual installments beginning on March 13, 2026.
Columbia Banking System EVP Aaron James Deer exercised restricted stock units into common shares as part of his compensation. On March 13, 2026 he converted 1,567 restricted stock units into common stock, with 617 common shares withheld at $26.23 per share to cover tax obligations, rather than sold in the market.
Following these transactions, he directly owns 41,875 common shares and 7,133 restricted stock units. The RSUs convert into common stock on a one-for-one basis. They stem from a 4,699-unit grant made on February 25, 2025, vesting in three annual installments beginning March 13, 2026.
COLUMBIA BANKING SYSTEM, INC. Senior Executive VP Nixon Torran B reported open-market sales of common stock. On 2026-03-04, he sold 2,240 shares at an average price of $28.85, and on 2026-03-03 he sold 2,241 shares at $28.25.
After these transactions, he held 98,229 shares directly. Indirect holdings included 3,650 shares by a family trust and 1,876 shares by a 401(k) as of 2026-03-03. An open-market sale was made pursuant to a Rule 10b5-1 trading plan established on 2025-11-25.
Issuer filed a Form 144 reporting a proposed sale of 2,240 common shares tied to a restricted stock vesting on 03/01/2026 as compensation. The filing also records that Torran B. Nixon sold 2,241 common shares on 03/03/2026 for $63,308.25.