0000950123-24-001906.txt : 20240213 0000950123-24-001906.hdr.sgml : 20240213 20240213163011 ACCESSION NUMBER: 0000950123-24-001906 CONFORMED SUBMISSION TYPE: 13F-NT PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231231 FILED AS OF DATE: 20240213 DATE AS OF CHANGE: 20240213 EFFECTIVENESS DATE: 20240213 FILER: COMPANY DATA: COMPANY CONFORMED NAME: BCLS II Investco, LP CENTRAL INDEX KEY: 0001818893 ORGANIZATION NAME: IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-NT SEC ACT: 1934 Act SEC FILE NUMBER: 028-22978 FILM NUMBER: 24626535 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-NT 1 primary_doc.xml X0202 13F-NT LIVE 0001818893 XXXXXXXX 12-31-2023 12-31-2023 false BCLS II Investco, LP

200 Clarendon Street Boston MA 02116

13F NOTICE 028-22978 28-18477 Bain Capital Life Sciences Investors, LLC 28-20816 Bain Capital Life Sciences Investors II, LLC 28-20814 Bain Capital Life Sciences Fund II, L.P. 28-22976 BCLS II Investco (GP), LLC Y The report on Form 13F for the period ended December 31, 2023 for BCLS II Investco, LP (the "Fund") is being filed by Bain Capital Life Sciences Investors, LLC, which is 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 the Fund. Adam Koppel 617-516-2000 /s/ Adam Koppel Boston MA 02-13-2024