0001973141-23-000076.txt : 20230609 0001973141-23-000076.hdr.sgml : 20230609 20230609162801 ACCESSION NUMBER: 0001973141-23-000076 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230609 DATE AS OF CHANGE: 20230609 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Keros Therapeutics, Inc. CENTRAL INDEX KEY: 0001664710 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 811173868 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-39264 FILM NUMBER: 231005702 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 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Regnante Keith CENTRAL INDEX KEY: 0001682068 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 733 CONCORD AVENUE CITY: CAMBRIDGE STATE: MA ZIP: 02138 144 1 primary_doc.xml 144 0001682068 XXXXXXXX LIVE 0001664710 Keros Therapeutics, Inc. 001-39264 1050 WALTHAM STREET, SUITE 302 LEXINGTON MA 02421 617-314-6297 Regnante Keith Officer Common UBS Financial Services, Inc.

1000 Harbor Boulevard Weehawken NJ 07086

20000 908322.00 29584173 06/09/2023 NASDAQ Common 06/09/2023 Exercise of Stock Option ISSUER N 20000 06/09/2023 Cash N Keith Regnante

1050 WALTHAM STREET, SUITE 302 Lexington MA 02421

Common 06/08/2023 20000 955852.00 06/09/2023 03/08/2023 /s/ UBS Financial Services Inc, as attorney-in-fact for Keith Regnante