X0609 4 2026-06-11 0001657677 Parabilis Medicines, Inc. PBLS 0001346824 RA CAPITAL MANAGEMENT, L.P. false 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 true false true false 0001315082 RA Capital Healthcare Fund LP false C/O RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 1 0 1 0 0001883840 RA Capital Nexus Fund III, L.P. false C/O RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 1 0 0 0 0001384859 Kolchinsky Peter false C/O RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 1 0 1 0 0001619841 Shah Rajeev M. false C/O RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 1 0 1 0 0 Voting Common Stock 2026-06-11 4 C 0 6556740 A 6556740 I See footnotes Voting Common Stock 2026-06-11 4 C 0 1187881 A 1187881 I See footnotes Voting Common Stock 2026-06-11 4 P 0 19728353 20 A 26285093 I See footnotes Voting Common Stock 2026-06-11 4 P 0 1460397 20 A 2648278 I See footnotes Series E Preferred Stock 2026-06-11 4 C 0 642250 D Voting Common Stock 419006 0 I See footnotes Series E Preferred Stock 2026-06-11 4 C 0 160562 D Voting Common Stock 104751 0 I See footnotes Series F Preferred Stock 2026-06-11 4 C 0 9445363 D Voting Common Stock 6137734 0 I See footnotes Series F Preferred Stock 2026-06-11 4 C 0 1666829 D Voting Common Stock 1083130 0 I See footnotes Each share of Series E Preferred Stock automatically converted into Voting Common Stock on a 1 to 0.6524 basis immediately prior to the closing of the IPO and without payment of consideration. The Series E Preferred Stock has no expiration date. Each share of Series F Preferred Stock automatically converted into shares of Voting Common Stock on a 1 to 0.6498 basis immediately prior to the closing of the IPO and without payment of consideration. The Series F Preferred Stock has no expiration date. RA Capital Management, L.P. (the "Adviser") is the investment manager for RA Capital Healthcare Fund, L.P. (the "Fund") and RA Capital Nexus Fund III, L.P. (the "Nexus Fund III"). The general partner of the Adviser is RA Capital Management GP, LLC (the "Adviser GP"), of which Dr. Peter Kolchinsky and Mr. Rajeev Shah are the managing members. Each of the Adviser, the Adviser GP, the Fund, the Nexus Fund III, Dr. Kolchinsky and Mr. Shah disclaims beneficial ownership of any of the reported securities, except to the extent of its or his respective pecuniary interest therein. Held directly by the Fund. Held directly by Nexus Fund III. Dr. Jake Simson, a Partner of the Adviser, serves on the Issuer's board of directors. /s/ Peter Kolchinsky, Manager of RA Capital Management, L.P. 2026-06-15 /s/ Peter Kolchinsky, Manager of RA Capital Healthcare Fund GP, LLC the General Partner of RA Capital Healthcare Fund, L.P. 2026-06-15 /s/ Peter Kolchinsky, Manager of RA Capital Nexus Fund III GP, LLC the General Partner of RA Capital Nexus Fund III, L.P. 2026-06-15 /s/ Peter Kolchinsky, individually 2026-06-15 /s/ Rajeev Shah, individually 2026-06-15