X0306 4 2021-10-01 1 0001636286 Altabancorp ALTA 0001640719 Bayle Deborah S. C/O ALTABANCORP 1 EAST MAIN STREET AMERICAN FORK UT 84003 1 0 0 0 Common Shares 2021-10-01 4 D 0 6612 D 0 D Pursuant to the Agreement and Plan of Merger, dated as of May 18, 2021, Glacier Bancorp, Inc. (GBCI) acquired Altabancorp (ALTA) in a merger transaction (the "Merger") which became effective on October 1, 2021. At the effective time of the Merger, each share of ALTA common stock (par value $0.01 per share) converted to the right to receive 0.7971 of a share of GBCI common stock (and cash for any fractional shares). On September 30, 2021, the closing price for GBCI common stock was $55.35. /s/ Deborah S. Bayle, by Adelaide Maudsley, Attorney In Fact 2021-10-01