0000950123-24-001898.txt : 20240213 0000950123-24-001898.hdr.sgml : 20240213 20240213163008 ACCESSION NUMBER: 0000950123-24-001898 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20231231 FILED AS OF DATE: 20240213 DATE AS OF CHANGE: 20240213 EFFECTIVENESS DATE: 20240213 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Bain Capital Life Sciences Investors, LLC CENTRAL INDEX KEY: 0001703031 ORGANIZATION NAME: IRS NUMBER: 813996001 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-18477 FILM NUMBER: 24626519 BUSINESS ADDRESS: STREET 1: 200 CLARENDON STREET CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 6175162878 MAIL ADDRESS: STREET 1: 200 CLARENDON STREET CITY: BOSTON STATE: MA ZIP: 02116 13F-HR 1 primary_doc.xml X0202 13F-HR LIVE 0001703031 XXXXXXXX 12-31-2023 12-31-2023 false Bain Capital Life Sciences Investors, LLC

200 Clarendon Street Boston MA 02116

13F HOLDINGS REPORT 028-18477 Y Bain Capital Life Sciences Investors, LLC ("BCLSI") is (i) the general partner of Bain Capital Life Sciences Partners, LP, which is the general partner of Bain Capital Life Sciences Fund, L.P., (ii) the general partner of BC SW, LP, (iii) the manager of Bain Capital Life Sciences Investors II, LLC, which is the general partner of Bain Capital Life Sciences Fund II, L.P., which is the manager of BCLS II Investco (GP), LLC, which is the general partner of BCLS II Investco, LP, and (iv) the manager of Bain Capital Life Sciences III General Partner, LLC, which is the general partner of Bain Capital Life Sciences Fund III, L.P., which is the sole member of Bain Capital Life Sciences Opportunities III GP, LLC, which is the general partner of Bain Capital Life Sciences Opportunities III, LP. The shares of Annexon, Inc. ("ANNX") are as reported on Amend. No. 3 to Schedule 13G filed by affiliates of BCLSI on 2/13/24 and reflect the exercise of securities held by such persons for ANNX common stock, after giving effect to 9.99% conversion blockers. As of 12/31/23, such persons held 5,701,926 shares of ANNX common stock. The shares of Savara Inc. ("SVRA") are as reported on Amend. No. 2 to Schedule 13D filed by affiliates of BCLSI on 7/19/23 and reflect the exercise of securities held by such persons for SVRA common stock, after giving effect to 9.99% conversion blockers. As of 12/31/23, such persons held 6,913,208 shares of SVRA common stock. The shares of Syros Pharmaceuticals, Inc. ("SYRS") are as reported on Amend. No. 3 to Schedule 13G filed by affiliates of BCLSI on 2/13/24 and reflect the exercise of securities held by such persons for SYRS common stock, after giving effect to 9.99% conversion blockers. As of 12/31/23, such persons held 1,230,857 shares of SYRS common stock. The shares of X4 Pharmaceuticals, Inc. ("XFOR") are as reported on Amend. No. 3 to Schedule 13G filed by affiliates of BCLSI on 2/13/24 and reflect the exercise of securities held by such persons for XFOR common stock, after giving effect to 9.99% conversion blockers. As of 12/31/23, such persons held 14,879,809 shares of XFOR common stock. Adam Koppel 617-516-2000 /s/ Adam Koppel Boston MA 02-13-2024 11 27 1043257107 false 1 28-18476 Bain Capital Life Sciences Partners, LP 2 28-18478 Bain Capital Life Sciences Fund, L.P. 3 28-20270 BC SW, LP 4 28-20816 Bain Capital Life Sciences Investors II, LLC 5 28-20814 Bain Capital Life Sciences Fund II, L.P. 6 28-22976 BCLS II Investco (GP), LLC 7 28-22978 BCLS II Investco, LP 8 28-22975 Bain Capital Life Sciences III General Partner, LLC 9 28-22979 Bain Capital Life Sciences Fund III, L.P. 10 28-22968 Bain Capital Life Sciences Opportunities III GP, LLC 11 28-22966 Bain Capital Life Sciences Opportunities III, LP INFORMATION TABLE 2 30472.xml INFORMATION TABLE FOR FORM 13F 2SEVENTY BIO INC COMMON STOCK 901384107 5686790 1331801 SH SOLE 1331801 0 0 ACLARIS THERAPEUTICS INC COM 00461U105 3675000 3500000 SH SOLE 3500000 0 0 ANNEXON INC COM 03589W102 36600204 8061719 SH SOLE 8061719 0 0 ARCUTIS BIOTHERAPEUTICS INC COM 03969K108 9690000 3000000 SH SOLE 3000000 0 0 ATEA PHARMACEUTICALS INC COM 04683R106 7581196 2485638 SH SOLE 2485638 0 0 C4 THERAPEUTICS INC COM STK 12529R107 9278487 1642210 SH SOLE 1642210 0 0 CABALETTA BIO INC COM 12674W109 45400000 2000000 SH SOLE 2000000 0 0 DISC MEDICINE INC COM 254604101 76967799 1332545 SH SOLE 1332545 0 0 INVIVYD INC COM 00534A102 7632596 1937207 SH SOLE 1937207 0 0 MADRIGAL PHARMACEUTICALS INC COM 558868105 75110344 324619 SH SOLE 324619 0 0 MARINUS PHARMACEUTICALS INC COM NEW 56854Q200 15555600 1431058 SH SOLE 1431058 0 0 MERSANA THERAPEUTICS INC COM 59045L106 20099721 8663673 SH SOLE 8663673 0 0 NATERA INC COM 632307104 25068340 400197 SH SOLE 400197 0 0 NAUTILUS BIOTECHNOLOGY INC COM 63909J108 5980000 2000000 SH SOLE 2000000 0 0 NEWAMSTERDAM PHARMA COMPANY ORDINARY SHARES N62509109 116993608 10473913 SH SOLE 10473913 0 0 NEWAMSTERDAM PHARMA COMPANY *W EXP 11/22/202 N62509117 313000 100000 SH SOLE 100000 0 0 NURIX THERAPEUTICS INC COM 67080M103 18812153 1822883 SH SOLE 1822883 0 0 NUVALENT INC COM 670703107 263251079 3577267 SH SOLE 3577267 0 0 PHARVARIS N V COM N69605108 109516148 3904319 SH SOLE 3904319 0 0 RAPID MICRO BIOSYSTEMS INC CLASS A COM 75340L104 6241574 8434560 SH SOLE 8434560 0 0 SAVARA INC COM 805111101 66893930 14232751 SH SOLE 14232751 0 0 SOLID BIOSCIENCES INC COM NEW 83422E204 19220791 3130422 SH SOLE 3130422 0 0 SYROS PHARMACEUTICALS INC COM NEW 87184Q206 21421004 2749808 SH SOLE 2749808 0 0 TANGO THERAPEUTICS INC COM 87583X109 28637364 2892663 SH SOLE 2892663 0 0 X4 PHARMACEUTICALS INC COM 98420X103 14183885 16915784 SH SOLE 16915784 0 0 XILIO THERAPEUTICS INC COM 98422T100 1542977 2805413 SH SOLE 2805413 0 0 REVOLUTION MEDICINES INC COM 76155X100 31903517 1112396 SH SOLE 1112396 0 0