X0609 4 2026-09-18 0 0001447028 Arbutus Biopharma Corp ABUS 0001310845 Beardsley Robert A false C/O ARBUTUS BIOPHARMA CORPORATION 701 VETERANS CIRCLE WARMINSTER PA 18974 1 0 0 0 0 Common Shares 2026-09-18 4 M 0 52533 3.20 A 52533 D Common Shares 2026-09-18 4 M 0 78800 4.24 A 131333 D Common Shares 2026-09-18 4 F 0 99057 5.07 D 32276 D Stock Option (Right to Buy) 3.20 2026-09-18 4 M 0 52533 0 D 2035-03-18 Common Shares 52533 105067 D Stock Option (Right to Buy) 4.24 2026-09-18 4 M 0 78800 0 D 2026-06-08 2036-06-08 Common Shares 78800 0 D The Reporting Person exercised options on September 18, 2026. The Issuer withheld an aggregate of 99,057 shares otherwise issuable upon the exercises to satisfy the aggregate exercise prices. The option, representing a right to purchase a total of 157,600 shares, vests over a three-year period, with 1/3rd of the total shares subject to the option vesting at each of the 1st, 2nd and 3rd anniversaries of the March 18, 2025 grant date, subject to the Reporting Person's continuous service as of each vesting date. The option, representing a right to purchase a total of 78,800 shares, was fully vested and exercisable as of the June 8, 2026 grant date. /s/ Tuan Nguyen as attorney-in-fact for Robert A Beardsley 2026-09-23