X0306 4 2021-08-10 0 0001773427 SpringWorks Therapeutics, Inc. SWTX 0001703031 Bain Capital Life Sciences Investors, LLC 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001786351 BC SW, LP 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001702957 Schwartz Jeffrey Lawrence 200 CLARENDON STREET BOSTON MA 02116 1 0 1 0 0001578965 Koppel Adam 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 Common Stock 2021-08-10 4 S 0 1000000 70.25 D 4831307 I See footnotes Common Stock 1106 D Represents shares of common stock held directly by BC SW, LP. Bain Capital Life Sciences Investors, LLC ("BCLSI"), whose managers are Jeffrey Schwartz and Adam Koppel, is the general partner of BC SW, LP. As a result, each of BCLSI, Mr. Schwartz and Dr. Koppel may be deemed to share voting and dispositive power with respect to the securities held by BC SW, LP. BCLSI, Mr. Schwartz and Dr. Koppel each disclaim beneficial ownership of such securities except to the extent of its or their pecuniary interest therein. Jeffrey Schwartz is a director of the Issuer. Represents a restricted stock award held directly by Jeffrey Schwartz. BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC, By: /s/ Chris Green, Title: Managing Director 2021-08-12 BC SW, LP, By: Bain Capital Life Sciences Investors, LLC, its general partner, By: /s/ Chris Green, Title: Managing Director 2021-08-12 /s/ Jeffrey Schwartz 2021-08-12 /s/ Adam Koppel 2021-08-12