David C. Lawson - Feb 28, 2023 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Role
EVP Chief H.R. Officer
Signature
/s/ Andrea M. Newburn, Attorney-in-fact
Stock symbol
COLB
Transactions as of
Feb 28, 2023
Transactions value $
$0
Form type
4
Date filed
3/2/2023, 05:09 PM
Previous filing
Feb 23, 2023

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction COLB Common Award $0 +950 +4.04% $0.00 24.4K Feb 28, 2023 Direct F1
transaction COLB Common Award $0 +950 +3.89% $0.00 25.4K Feb 28, 2023 Direct F1
transaction COLB Common Award $0 +1.46K +5.73% $0.00 26.9K Feb 28, 2023 Direct F1
transaction COLB Common Award $0 +1.3K +4.84% $0.00 28.2K Feb 28, 2023 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

David C. Lawson is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id Content
F1 At the effective time of the merger (the "Effective Time") of Cascade Merger Sub, Inc. ("Merger Sub"), a direct, wholly-owned subsidiary of the Issuer, with and into Umpqua Holdings Corporation ("Umpqua"), pursuant to that certain Agreement and Plan of Merger, dated as of October 11, 2021 (the "Merger Agreement"), by and among the Issuer, Umpqua and Merger Sub, each outstanding performance stock unit award of the Issuer granted under the Issuer's equity compensation plans was converted into a restricted stock unit award of the Issuer based on a level of performance determined in accordance with the Merger Agreement, with such awards continuing to vest after the Effective Time solely based on continued service.