X0609 4 2026-06-22 0002123613 Kardigan, Inc. KARD 0002016082 ARCH Venture Partners XIII, LLC false 8755 W. HIGGINS ROAD, SUITE 1025 CHICAGO IL 60631 1 0 1 0 0002016083 ARCH Venture Partners XIII, L.P. false 8755 W. HIGGINS ROAD, SUITE 1025 CHICAGO IL 60631 1 0 1 0 0002006772 ARCH Venture Fund XIII, L.P. false 8755 W. HIGGINS ROAD, SUITE 1025 CHICAGO IL 60631 1 0 1 0 0001219039 CRANDELL KEITH false 8755 W. HIGGINS ROAD, SUITE 1025 CHICAGO IL 60631 1 0 1 0 0001219042 NELSEN ROBERT false 8755 W. HIGGINS ROAD, SUITE 1025 CHICAGO IL 60631 1 0 1 0 0001569248 Burow Kristina false 8755 W. HIGGINS ROAD, SUITE 1025 CHICAGO IL 60631 1 0 1 0 0001229592 GILLIS STEVEN false 8755 WEST HIGGINS ROAD, SUITE 1025 CHICAGO IL 60631 1 0 1 0 0 Common Stock 2026-06-22 4 P 0 1250000 16.00 A 15042035 I By: ARCH Venture Fund XIII, L.P. These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any. ARCH Venture Partners XIII, LLC, By: /s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director 2026-06-24 ARCH Venture Partners XIII, L.P., By: ARCH Venture Partners XIII, LLC, its General Partner, By: /s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director 2026-06-24 ARCH Venture Fund XIII, L.P., By: ARCH Venture Partners XIII, L.P., its General Partner, By: ARCH Venture Partners XIII, LLC, its General Partner, By: /s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director 2026-06-24 Keith Crandell, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact 2026-06-24 Robert Nelsen, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact 2026-06-24 Kristina Burow, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact 2026-06-24 Steven Gillis, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact 2026-06-24