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COLUMBIA BANKING SYSTEM, INC.

COLB · CIK 0000887343

SEC FORM 4
$0.00

COLUMBIA BANKING SYSTEM, INC. (COLB)

Acquisition (code A) of 2,577 shares at $0 per share.

Reporting Person GARDNER STEVEN R · Transaction Code A

Traded Sep 4, 2026 · Disclosed Sep 8, 2026

Source: SEC Form 4 · 0001267342-26-000003 · filed 2026-09-08 · View filing →

SEC FORM 4
$0.00

COLUMBIA BANKING SYSTEM, INC. (COLB)

Acquisition (code A) of 2,670 shares at $0 per share.

Reporting Person LAGOMARSINO SIMONE · Transaction Code A

Traded Sep 2, 2026 · Disclosed Sep 4, 2026

Source: SEC Form 4 · 0001084960-26-000007 · filed 2026-09-04 · View filing →

SEC FORM 4
$78,227.17

COLUMBIA BANKING SYSTEM, INC. (COLB)

Acquisition (code M) of 2,393 shares at $32.69 per share.

Reporting Person Giem Judi · Officer Title EVP CHRO · Transaction Code M

Traded Aug 14, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0000887343-26-000174 · filed 2026-08-18 · View filing →

SEC FORM 4
$21,019.67

COLUMBIA BANKING SYSTEM, INC. (COLB)

Disposition (code F) of 643 shares at $32.69 per share.

Reporting Person Giem Judi · Officer Title EVP CHRO · Transaction Code F

Traded Aug 14, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0000887343-26-000174 · filed 2026-08-18 · View filing →

STOCK ACT PTR
$1,001 - $15,000

Umpqua Holdings Corp (COLB)

Sale.

Filer Josh Gottheimer · Chamber House · District NJ05 · Owner Joint · Transaction Type Sale · Asset Type Stock

Traded Mar 5, 2026 · Disclosed Apr 8, 2026FILED +34 DAYS

Source: House Clerk PTR · 20034305 · filed 2026-04-08 · View filing →