Columbia Banking System Inc. – Material Contracts Watch

from 10-K 4 pages Lisa White Address on File With the Company Re: Leadership Transition Dear Lisa: This Letter Memorializes Our Understanding Regarding the Transition of Your Employment With Columbia Bank (The “Bank”) and Your Service With Columbia Banking System, Inc. (“Cbsi” and Together With the Bank, the “Company”). 1.transition. Effective Immediately, You Will (I) Begin Serving as a Senior Advisor to the Company (“Advisor”) and (II) Cease Serving in Any Director, Officer, Manager, Committee Member or Other Positions That You Hold With the Company and Its Subsidiaries. You Will Serve as Advisor and Remain a Full-Time Non-Executive Employee of the Bank in That Role Through March 13, 2026 (The “Separation Date”) or Your Earlier Termination by the Bank for Cause (As Defined in Cbsi’s Executive Change in Control and Severance Plan (The “Severance Plan”))

from 10-K 2 pages Offer Letter - Seda

from 10-K 15 pages Executive Supplemental Compensation Agreement

from 8-K 4 pages Ronald L. Farnsworth Address on File With the Company Re: Leadership Transition Dear Ron: This Letter Memorializes Our Understanding Regarding the Transition of Your Employment With Columbia Bank (The “Bank”) and Your Service With Columbia Banking System, Inc. (“Cbsi” and Together With the Bank, the “Company”)

from 8-K 8 pages Consulting Agreement

from 10-K 13 pages Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 2 pages First Amendment to the First Amended and Restated Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 3 pages Third Amendment to the Umpqua Bank Joint Beneficiary Agreement

from 10-K 2 pages First Amendment to the Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 3 pages Third Amendment to the Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 2 pages Third Amendment to the Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 3 pages First Amendment to the Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 3 pages First Amendment to the First Amended and Restated Umpqua Bank Joint Beneficiary Agreement

from 10-K 3 pages First Amendment to the First Amended and Restated Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 3 pages First Amendment to the First Amended and Restated Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 3 pages First Amendment to the Umpqua Bank Endorsement Method Split Dollar Agreement

from 10-K 5 pages Participation Agreement

from 10-Q 4 pages Participation Agreement

from 10-Q 11 pages Columbia Banking System, Inc. Executive Change in Control and Severance Plan

from 8-K 1 page Second Amendment to Amended and Restated Employee Stock Purchase Plan of Columbia Banking System, Inc