SEC Form 4 · Updated Daily

COLB

— COLUMBIA BANKING SYSTEM, INC. Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

FinancialsOwnership

Current Reporting Owners

OwnerRoleShares OwnedAs OfLast Activity
Stein ClintDirector · Officer151,5842026-03-13F
Nixon Torran BOfficer101,2402026-03-13F
OGNALL ANDREW HOfficer74,1322026-03-13F
Terry Hilliard C. IIIDirector55,5142026-05-14A
BARUFFI KUMI YAMAMOTOOfficer53,7152026-03-13S
SCHULTZ JOHN FDirector50,3842026-05-14A
Merrywell ChristopherOfficer44,0672026-03-13F
Deer Aaron JamesOfficer42,7612026-06-30P
MITCHELL M CHRISTIANDirector41,9092026-05-14A
Forrest EricDirector36,3512026-05-14A
Finkelstein Mark ADirector35,5542026-05-14A
Namdar FrankOfficer31,9232026-03-13F
Varnado AnddriaDirector30,8942026-05-14A
MACHUCA LUISDirector29,9532026-05-14A
Lund Randal LeeDirector27,6632026-05-14A
Anderson Drew KOfficer21,9692026-03-13F
STUDENMUND JAYNIE MDirector21,8072026-05-14A
Moore Devine DavidOfficer18,6362026-06-08S
Lakely BrockOfficer10,7082026-04-15F
SEATON ELIZABETH WHITEHEADDirector3,9492026-05-14A
LAGOMARSINO SIMONEDirector2,6702026-09-02A
GARDNER STEVEN RDirector2,5772026-09-04A
Giem JudiOfficer1,7502026-08-14F

Recent Filings

DateOwnerActivitySharesPriceOwned After
2026-09-04GARDNER STEVEN RGrant / award2,577$0.002,577
2026-09-02LAGOMARSINO SIMONEGrant / award2,670$0.002,670
2026-08-14Giem JudiOption exercise (derivative)2,393—13,108
2026-08-14Giem JudiTax withholding643$32.691,750
2026-08-14Giem JudiOption exercise2,393$32.692,393
2026-06-30Deer Aaron JamesOpen-market buy886$25.3742,761
2026-06-15MACHUCA LUISGrant / award (derivative)563$31.7848,966
2026-06-08Moore Devine DavidOpen-market sale3,812$29.7718,636
2026-06-08Moore Devine DavidOpen-market sale60$29.7722,448
2026-05-14Finkelstein Mark AGrant / award3,949$0.0035,554
2026-05-14Forrest EricGrant / award3,949$0.0036,351
2026-05-14Lund Randal LeeGrant / award3,949$0.0027,663
2026-05-14MACHUCA LUISGrant / award3,949$0.0029,953
2026-05-14MITCHELL M CHRISTIANGrant / award3,949$0.0041,909
2026-05-14SCHULTZ JOHN FGrant / award3,949$0.0050,384
2026-05-14SEATON ELIZABETH WHITEHEADGrant / award3,949$0.003,949
2026-05-14STUDENMUND JAYNIE MGrant / award3,949$0.0021,807
2026-05-14Terry Hilliard C. IIIGrant / award3,949$0.0055,514
2026-05-14Varnado AnddriaGrant / award3,949$0.0030,894
2026-04-15Lakely BrockTax withholding396$29.1010,708
2026-03-16MACHUCA LUISGrant / award (derivative)659$26.8348,403
2026-03-13Anderson Drew KOption exercise (derivative)2,506$0.0050,607
2026-03-13Anderson Drew KTax withholding1,215$26.2321,969
2026-03-13Anderson Drew KOption exercise2,506$26.2323,184
2026-03-13BARUFFI KUMI YAMAMOTOOption exercise (derivative)2,381$0.0013,083
2026-03-13BARUFFI KUMI YAMAMOTOOpen-market sale937$26.2353,715
2026-03-13BARUFFI KUMI YAMAMOTOOption exercise2,381$26.2354,652
2026-03-13Deer Aaron JamesOption exercise (derivative)1,567$0.007,133
2026-03-13Deer Aaron JamesTax withholding617$26.2341,875
2026-03-13Deer Aaron JamesOption exercise1,567$26.2342,492
2026-03-13Lakely BrockOption exercise (derivative)846$0.009,810
2026-03-13Lakely BrockOpen-market sale211$26.2311,104
2026-03-13Lakely BrockOption exercise846$26.2311,315
2026-03-13Merrywell ChristopherOption exercise (derivative)5,013$0.0051,291
2026-03-13Merrywell ChristopherTax withholding1,973$26.2344,067
2026-03-13Merrywell ChristopherOption exercise5,013$26.2346,040
2026-03-13Moore Devine DavidOption exercise (derivative)940$0.004,679
2026-03-13Moore Devine DavidTax withholding376$26.2322,508
2026-03-13Moore Devine DavidOption exercise940$26.2322,884
2026-03-13Namdar FrankOption exercise (derivative)2,820$0.0013,640

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.