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: The Vanguard Group filed Amendment No. 14 to a Schedule 13G/A reporting beneficial ownership of 0 shares of Columbia Banking System Inc common stock following an internal realignment effective January 12, 2026. The filing states certain Vanguard subsidiaries will report ownership separately and that The Vanguard Group, Inc. no longer is deemed to beneficially own securities held by those subsidiaries. The form is signed by Ashley Grim, Head of Global Fund Administration on March 26, 2026.
Columbia Banking System executive Kumi Yamamoto Baruffi reported a routine tax-related share disposition. On March 13, 2026, 937 shares of common stock were withheld by the issuer at a price of $26.23 per share to satisfy tax obligations tied to equity award vesting. After this withholding, Baruffi directly owned 53,715 shares of Columbia Banking System common stock. An earlier Form 4 had incorrectly labeled the transaction as an open-market sale; this amendment corrects the code to show it was a tax-withholding event rather than a discretionary sale.
Columbia Banking System executive Lakely Brock reported a routine tax-related share disposition. On March 13, shares of Common Stock were withheld by the issuer to satisfy tax obligations tied to an equity award vesting, totaling 211 shares at $26.23 per share. After this withholding, Brock directly holds 11,104 shares.
Columbia Banking System director Luis Machuca reported a compensation-related award of deferred compensation phantom stock. On this Form 4, Machuca acquired 659 units of Deferred Compensation Phantom Stock tied to Columbia Banking System common stock at a reference price of $26.83 per unit.
The units were credited under the company’s deferred compensation plan and are held as an indirect interest classified as deferred compensation. Following this award, Machuca’s deferred compensation phantom stock balance is 48,403 units. According to the plan terms, these amounts will be paid after his employment with the company ends.
Columbia Banking System Chair, CEO and President Clint Stein exercised 18,171 restricted stock units into common shares and had part of the shares withheld for taxes. The restricted stock units converted one-for-one into common stock, and the associated common stock transaction was valued at $26.23 per share.
Of the 18,171 common shares tied to this vesting, 7,151 shares were withheld to satisfy tax obligations, leaving a net increase of 11,020 shares in his direct holdings. After these compensation-related transactions, Stein directly holds 151,584 shares of Columbia Banking System common stock.
The restricted stock units come from a grant of 54,511 units awarded on February 25, 2025, which vests in three equal annual installments beginning on March 13, 2026. This filing reflects the first vesting installment and related tax withholding rather than an open-market purchase or sale.
EVP and Chief Risk Officer Andrew H. Ognall of Columbia Banking System converted 2,381 Restricted Stock Units into the same number of common shares on March 13, 2026. The common stock is shown at $26.23 per share in the filing.
To cover tax obligations, 951 common shares were withheld, leaving Ognall with a net increase of common stock while maintaining a direct holding of 74,132 shares after these transactions. He also holds 2,635 common shares indirectly through a 401(k) plan.
The RSUs come from a grant of 7,142 units awarded on February 25, 2025, scheduled to vest in three annual installments beginning March 13, 2026.
Columbia Banking System senior executive Torran B. Nixon reported routine equity compensation activity. On March 13, 2026, 5,013 Restricted Stock Units converted into the same number of common shares, reflecting the first vesting installment from a 15,037-unit grant made on February 25, 2025.
To cover tax obligations, 2,002 common shares were withheld at $26.23 per share, a non‑market, tax-withholding disposition rather than an open-market sale. Following this vesting, Nixon still holds 49,052 Restricted Stock Units, which are scheduled to vest in later installments, and also has indirect common stock holdings through a family trust and a 401(k) plan.
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.