X0306 4 2019-09-17 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 C/O BAIN CAPITAL LIFE SCIENCES INVESTORS LLC, 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 2019-09-17 4 C 0 6078103 A 6078103 I See Footnotes Common Stock 2019-09-17 4 C 0 1053204 A 7131307 I See Footnotes Common Stock 2019-09-17 4 P 0 150000 18.00 A 7281307 I See Footnotes Series A Convertible Preferred Stock 2019-09-17 4 C 0 6078103 D Common Stock 6078103 0 I See Footnotes Series B Convertible Preferred Stock 2019-09-17 4 C 0 1053204 D Common Stock 1053204 0 I See Footnotes Each share of Series A Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 6.5810:1 basis. Upon the closing of the Issuer's initial public offering, all shares of Series A Convertible Preferred Stock automatically converted into shares of Common Stock of the Issuer. The Series A Convertible Preferred Stock had no expiration date. Each share of Series B Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 6.5810:1 basis. Upon the closing of the Issuer's initial public offering, all shares of Series B Convertible Preferred Stock automatically converted into shares of Common Stock of the Issuer. The Series B Convertible Preferred Stock had no expiration date. Represents shares purchased in the Issuer's initial public offering. Represents shares held directly by BC SW, L.P. Bain Capital Life Sciences Investors, LLC ("BCI LS"), whose managers are Jeffrey Schwartz and Adam Koppel, is the general partner of BC SW, L.P. As a result, each of BCI LS, Mr. Schwartz and Dr. Koppel may be deemed to share voting and dispositive power with respect to the securities held by BC SW, L.P. BCI LS, Mr. Schwartz and Dr. Koppel each disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein. Jeffrey Schwartz is a director of the Issuer. Bain Capital Life Sciences Investors, LLC, By: /s/ Jeffery L. Schwartz, Name: Jeffery L. Schwartz, Title: Managing Director 2019-09-19 BC SW, L.P., By: Bain Capital Life Sciences Investors, LLC, its general partner, By: /s/ Jeffery L. Schwartz, Name: Jeffery L. Schwartz, Title: Managing Director 2019-09-19 /s/Jeffery L. Schwartz 2019-09-19 /s/ Adam Koppel 2019-09-19