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CIK 0000887343 · Large accelerated filer

COLUMBIA BANKING SYSTEM, INC.

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Ticker
COLB
Exchange
Nasdaq
Industry
State Commercial Banks
FY end
Dec 31
Incorporated
WA
Entity type
operating
EIN
911422237
Phone
2533051900
Business address
1301 A STREET, TACOMA, WA, 98402
Former names
COLUMBIA BANKING SYSTEM INC
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$328,617
in 1 filing

Net −$328,617. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. GARDNER STEVEN R −$329K Director sold 80% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-05-14 Finkelstein Mark A Director Grant or award +3,949 35,554
2026-05-14 Terry Hilliard C. III Director Grant or award +3,949 55,514
2026-05-14 MITCHELL M CHRISTIAN Director Grant or award +3,949 41,909
2026-05-14 STUDENMUND JAYNIE M Director Grant or award +3,949 21,807
2026-05-14 MACHUCA LUIS Director Grant or award +3,949 29,953
2026-05-14 Varnado Anddria Director Grant or award +3,949 30,894
2026-05-14 SCHULTZ JOHN F Director Grant or award +3,949 50,384
2026-04-15 Lakely Brock EVP, Chief Accounting Officer Shares withheld for taxes −396 $29.10 $12K 10,708
2026-03-16 MACHUCA LUIS Director Grant or award · Deferred Compensation Phantom Stock +659 $26.83 $18K 48,403
2026-03-13 BARUFFI KUMI YAMAMOTO EVP General Counsel, Corp Sec Shares withheld for taxes −937 $26.23 $25K 53,715
2026-03-13 Lakely Brock EVP, Chief Accounting Officer Shares withheld for taxes −211 $26.23 $6K 11,104
2026-03-13 Anderson Drew K EVP Chief Admin Officer Option exercise +2,506 $26.23 $66K 23,184
2026-03-13 Anderson Drew K EVP Chief Admin Officer Shares withheld for taxes −1,215 $26.23 $32K 21,969
2026-03-13 Anderson Drew K EVP Chief Admin Officer Option exercise · Restricted Stock Unit −2,506 50,607
2026-03-13 Deer Aaron James EVP Chief Strategy/Innov Offcr Option exercise +1,567 $26.23 $41K 42,492
2026-03-13 Deer Aaron James EVP Chief Strategy/Innov Offcr Shares withheld for taxes −617 $26.23 $16K 41,875
2026-03-13 Deer Aaron James EVP Chief Strategy/Innov Offcr Option exercise · Restricted Stock Unit −1,567 7,133
2026-03-13 Moore Devine David EVP Chief Marketing Officer Option exercise +940 $26.23 $25K 22,884
2026-03-13 Moore Devine David EVP Chief Marketing Officer Shares withheld for taxes −376 $26.23 $10K 22,508
2026-03-13 Moore Devine David EVP Chief Marketing Officer Option exercise · Restricted Stock Unit −940 4,679

Page 2 of 8 · 159 trades