Ownership Filing by Stephen Quake

This filing details the ownership of AbCellera Biologics Inc. (ABCL) common shares by Stephen Quake. Following a reportable period ending November 10, 2025, Mr. Quake directly owns 371,056 shares. Additionally, he has indirect ownership through a family foundation, holding 264,300 shares, and through a trust for his children, holding 465,080 shares. Mr. Quake is a director of the family foundation and a trustee of the children's trust, disclaiming beneficial ownership of these indirectly held shares except for any indirect pecuniary interest. The filing was signed by Tryn Stimart, as attorney-in-fact, on December 19, 2025.