X0609 4 2026-06-11 0001817229 Vor Biopharma Inc. VOR 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 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 1 0 1 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 Stock Option (Right to Buy) 14.09 2026-06-11 4 A 0 57162 0 A 2036-06-10 Common Stock 57162 57162 I See Footnotes One thirty-sixth of the shares subject to the option shall vest and become exercisable on July 11, 2026 and each month thereafter, subject to Dr. Andrew Levin's continued service through each such vesting date. RA Capital Management, L.P. (the "Adviser") is the investment manager for RA Capital Healthcare Fund, L.P. (the "Fund"). 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, Dr. Kolchinsky, and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of its or his respective pecuniary interest therein. Under Dr. Levin's arrangement with the Adviser, Dr. Levin holds the option for the benefit of the Fund. Dr. Levin is obligated to turn over to the Adviser any net cash or stock received upon exercise of the option, which will offset advisory fees owed by the Fund to the Adviser. The Reporting Persons therefore disclaim beneficial ownership of the option and underlying common stock. Dr. Andrew Levin, a Partner and Managing Director of the Adviser, serves on the Issuer's board of directors. /s/ Peter Kolchinsky, Manager of RA Capital Management, L.P. 2026-06-12 /s/ Peter Kolchinsky, Manager of RA Capital Healthcare GP, LLC, the General Partner of RA Capital Healthcare Fund, L.P. 2026-06-12 /s/ Peter Kolchinsky, individually 2026-06-12 /s/ Rajeev Shah, individually 2026-06-12