Columbia Banking Systems Inc Form 4 Filings

COLUMBIA BANKING SYSTEM, INC. (symbol: COLB) is the issuer of record for a Form 4 filing submitted to the SEC. GARDNER STEVEN R reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. (COLB) reported that director Steven R. Gardner received a grant or award of 2,577 shares of Common Stock on September 4, 2026, at no stated purchase price, bringing his directly held shares to 2,577. He also reports indirect ownership of 570,370 shares held by a family trust.

COLUMBIA BANKING SYSTEM, INC. (symbol: COLB) is the issuer of record for a Form 4 filing submitted to the SEC. LAGOMARSINO SIMONE reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. (COLB) director Simone Lagomarsino received a grant of 2,670 shares of common stock on September 2, 2026, as an award with no cash price per share. After this award, Lagomarsino holds 2,670 shares directly, plus additional indirect holdings through a family trust and an IRA.

The director is reported as holding 32,931 shares indirectly through a family trust and 7 shares indirectly through an IRA. No transactions in this filing are reported as being made under a Rule 10b5-1 trading plan.

COLUMBIA BANKING SYSTEM, INC. (COLB) reported insider equity activity by EVP and CHRO Judi Giem. On August 14, 2026, 2,393 Restricted Stock Units converted into an equal number of common shares at a reported value of $32.69 per share. Of these shares, 643 common shares were delivered or withheld for payment of exercise price or tax liability, and 13,108 Restricted Stock Units remained outstanding after the conversion. The filing’s Rule 10b5-1 trading-plan box was not checked.

Columbia Banking System EVP Aaron James Deer, Chief Strategy and Innovation Officer, bought 886 shares of common stock in an open-market transaction recorded as an ESPP purchase at $25.37 per share. After this transaction, he directly owns 42,761 common shares, indicating a small incremental increase in his personal stake.

MACHUCA LUIS reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System director Luis Machuca received a compensation-related award of 563 units of Deferred Compensation Phantom Stock tied to Columbia common stock. The award was valued at $31.78 per unit on the grant date and is held as an indirect deferred compensation position.

Following this grant, Machuca’s deferred compensation account reflects a total of 48,966 phantom stock units. According to the company’s deferred compensation plan, these phantom stock units will be settled after he ceases serving as a director, in line with the plan’s terms, rather than through current market trading.

Columbia Banking System EVP Chief Marketing Officer David Moore Devine reported selling 3,872 shares of Common Stock in open-market transactions. The trades occurred on June 8, 2026 at prices around $29.77 per share. These were routine stock sales and he continues to hold a direct stake in the company after the transactions.

Varnado Anddria reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. director Anddria Varnado received a grant of 3,949 shares of Common Stock on May 14, 2026. The shares were awarded at a reported price of $0.00 per share, indicating a compensation-related equity award rather than an open-market purchase. Following this grant, Varnado directly holds 30,894 shares of the company’s common stock.

Terry Hilliard C. III reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. director Terry C. Hilliard III received a grant of 3,949 shares of Common Stock on May 14, 2026. The award was recorded at a price of $0.00 per share, indicating a compensation-related stock grant rather than an open-market purchase. Following this grant, Hilliard directly holds 55,514 shares of Common Stock.

STUDENMUND JAYNIE M reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System director Jaynie M. Studenmund reported a compensation-related stock grant. She received 3,949 shares of Columbia Banking System common stock as a grant or award at a stated price of $0.00 per share, increasing her direct holdings to 21,807 shares. A separate line shows 3,843 shares held indirectly through an IRA, which reflects an existing position rather than a new market transaction.

SEATON ELIZABETH WHITEHEAD reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. director Elizabeth Whitehead Seaton reported a routine equity grant and a change in how some shares are held. She received 3,949 shares of common stock as a grant, bringing her directly held shares to 3,949. A footnote explains that 32,566 shares previously reported as directly owned are now indirectly beneficially owned through a trust.

SCHULTZ JOHN F reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. director John F. Schultz received a grant of 3,949 shares of common stock on May 14, 2026, recorded at a price of $0.0000 per share, reflecting a stock-based award rather than a market purchase.

After this award, Schultz directly holds 50,384 shares of common stock. A footnote explains that his beneficial ownership totals were also adjusted to correct a prior reporting error, because a disposition of 3,000 shares reported on August 29, 2024 had not been included in subsequent ownership figures.

Columbia Banking System director Mitchell M. Christian received a grant of 3,949 shares of Common Stock on May 14, 2026 as a stock award, with no cash paid per share. This is a compensation-related acquisition, not an open-market trade. After the award, he directly holds 41,909 shares.

MACHUCA LUIS reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System director Luis Machuca received a grant of 3,949 shares of Common Stock on May 14, 2026. The shares were awarded at a price of $0.00 per share, indicating a compensation-related grant rather than a market purchase. Following this award, Machuca directly holds 29,953 shares of Columbia Banking System common stock.

COLUMBIA BANKING SYSTEM, INC. director Randal Lee Lund reported an acquisition of company stock as compensation. He received a grant of 3,949 shares of common stock at $0.0000 per share, bringing his direct holdings to 27,663 shares. He also reports 1,000 shares held indirectly through a family trust.

Forrest Eric reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System director Eric Forrest received a stock grant. He was awarded 3,949 shares of common stock on May 14, 2026 at no cost, classified as a grant or award. Following this award, he directly owns 36,351 shares of Columbia Banking System common stock.

Columbia Banking System, Inc. director Mark A. Finkelstein reported an equity grant of company common stock. He acquired 3,949 shares of Common Stock on May 14, 2026 in a transaction coded as a grant, award, or other acquisition at a stated price of $0.00 per share. Following this award, his directly held position increased to 35,554 common shares.

Columbia Banking System EVP and Chief Accounting Officer Lakely Brock had 396 shares of Common Stock withheld to cover tax obligations, based on a value of $29.10 per share. This tax-withholding disposition is not an open-market sale. After the transaction, Brock directly holds 10,708 shares of Columbia Banking System common stock.

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.

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.

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.

Stein Clint reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System director and CEO Clint Stein received a grant of 56,017 restricted stock units on 02/18/2026 at a reference price of $31.24 per unit. These RSUs vest in equal installments of 33.33% per year over three years. After this award, Stein directly holds 185,155 restricted stock units in total.

Columbia Banking System reported an equity compensation grant to its EVP and Chief Financial Officer, Ivan A. Seda. He acquired 12,804 restricted stock units at a reference price of $31.24 per unit as a grant or award, increasing his direct holdings of this derivative security to 12,804 units.

According to the terms, the restricted stock units granted on February 18, 2026 will vest in three equal annual installments of 33.33% per year over three years, aligning a portion of the CFO’s compensation with the company’s future performance and share value over that period.

OGNALL ANDREW H reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System EVP Chief Risk Officer Andrew H. Ognall received a grant of 8,002 restricted stock units on February 18, 2026. The award is scheduled to vest in roughly equal installments of 33.33% per year over three years, aligning part of his compensation with future company performance.

Nixon Torran B reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. Senior Executive VP Torran B. Nixon received a grant of 16,645 restricted stock units on 02/18/2026. These units were valued at $31.24 each at grant, and will vest 33.33% per year over three years. Following this award, Nixon holds 54,065 restricted stock units directly.

Namdar Frank reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System EVP and Chief Credit Officer Frank Namdar reported an equity award and updated deferred compensation holdings. He received a grant of 8,002 restricted stock units at a reference price of $31.24 per unit, increasing his directly held restricted stock units to 16,460.

The restricted stock units were granted on February 18, 2026 and will vest 33.33% per year over three years, providing time-based incentive compensation. Namdar also reported 2,917 units of deferred compensation phantom stock under the company’s deferred compensation plan, which will be settled in cash after his employment ends.

Moore Devine David reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System EVP and Chief Marketing Officer David Moore Devine received a grant of 2,800 restricted stock units on 02/18/2026. The units were valued at $31.24 per unit on the grant date and represent equity-based compensation rather than an open-market purchase.

The grant will vest in three equal installments of 33.33% per year over three years, encouraging longer-term retention. Following this award, Moore Devine holds a total of 5,619 restricted stock units directly.

Merrywell Christopher reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. Senior Executive VP Christopher Merrywell reported an equity compensation grant of 16,645 restricted stock units on 02/18/2026 at $31.24 per unit. After this award, he directly holds 56,304 units. The grant will vest 33.33% per year over three years.

Lakely Brock reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. executive Lakely Brock, EVP and Chief Accounting Officer, received a grant of 5,601 restricted stock units on February 18, 2026 at a reference price of $31.24 per unit. The award vests in three equal annual installments and brings Brock’s directly held RSUs to 10,656.