X0206 3 2020-06-18 0 0001538927 Forma Therapeutics Holdings, Inc., FMTX 0001384859 Kolchinsky Peter C/O RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 1 0 1 0 Series D Redeemable Convertible Preferred Stock Common Stock 5011651 I See footnotes Each share of Series D Preferred Stock is convertible into common stock on a one-for-4.2775 basis into the number of shares of common stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Series D Preferred Stock has no expiration date. Includes (a) 3,216,720 shares held by RA Capital Healthcare Fund, L.P. (the "Fund"), (b) 1,252,913 shares held by RA Capital Nexus Fund, L.P. (the "Nexus Fund") and (c) 542,018 shares held by a separately managed account (the "Account"). RA Capital Management, L.P. (the "Adviser") is the investment manager for the Fund, the Nexus Fund and the Account. 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. The Adviser, the Adviser GP, Dr. Kolchinsky, and Mr. Shah may be deemed indirect beneficial owners of the reported securities for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Act"). They disclaim beneficial ownership of any of the reported securities for the purpose of determining whether they are subject to Section 16 of the Act, however, in reliance on Rule 16a-1(a)(1)(v) and (vii). The reporting person disclaims beneficial ownership of securities held by the Fund and the Nexus Fund for purposes of Rule 16a-1(a)(2), except to the extent of his pecuniary interest therein, and disclaims any pecuniary interest in securities held in the Account for purposes of Rule 16a-1(a)(2). The filing of this Form 3 shall not be construed as an admission that either the Adviser, the Adviser GP, Dr. Kolchinsky, or Mr. Shah is or was for the purposes of Section 16(a), or otherwise, the beneficial owner of any of the securities held in the Account. Exhibit 24.1 - Power of Attorney /s/ Jeannette Potts, as Attorney-in-Fact 2020-06-18