0001221590-26-000021.txt : 20260617 0001221590-26-000021.hdr.sgml : 20260617 20260617165550 ACCESSION NUMBER: 0001221590-26-000021 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260615 FILED AS OF DATE: 20260617 DATE AS OF CHANGE: 20260617 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: BIENAIME JEAN JACQUES CENTRAL INDEX KEY: 0001221590 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-39264 FILM NUMBER: 261099282 MAIL ADDRESS: STREET 1: 925 PAGE MILL ROAD CITY: PALO ALTO STATE: CA ZIP: 94304 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Keros Therapeutics, Inc. CENTRAL INDEX KEY: 0001664710 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 811173868 FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1050 WALTHAM STREET, SUITE 302 CITY: LEXINGTON STATE: MA ZIP: 02421 BUSINESS PHONE: 617-314-6297 MAIL ADDRESS: STREET 1: 1050 WALTHAM STREET, SUITE 302 CITY: LEXINGTON STATE: MA ZIP: 02421 4 1 form4-06172026_080646.xml