Keros Therapeutics, Inc.

KROS·NASDAQ·$11.23Share Price as of 11/2·$359MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/03/26 10-QQ1 ended 03/31/2605/14/26 10-KFY 202503/04/26 10-QQ3 ended 09/30/2511/05/25 10-QQ2 ended 06/30/2508/06/25

Disclosures

8-KCurrent report09/29/26 8-KCurrent report09/28/26 8-KCurrent report09/08/26 8-KCurrent report08/03/26 8-KCurrent report08/03/26

Prospectuses and Registrations

S-3Shelf registration09/10/26 S-8Registration of securities for employees03/04/26 S-8Registration of securities for employees02/26/25 424B5Prospectus supplement06/17/24 S-3ASRAutomatic shelf registration05/03/24

Proxies

DEF 14ADefinitive proxy04/22/26 DEFA14AAdditional proxy materials04/22/26 DEFA14AAdditional proxy materials05/27/25 DEFA14AAdditional proxy materials05/19/25 DEFA14AAdditional proxy materials05/19/25

Ownership

SC 13G/ABeneficial ownership (amended)10/27/26 Form 4Insider transaction08/20/26 Form 4Insider transaction08/20/26 Form 4Insider transaction08/20/26 Form 4Insider transaction08/20/26

Other

EFFECTRequest for effectiveness09/16/26 DEL AMDEL AM09/11/26 ARSAnnual report to shareholders04/22/26 SC TO-I/ASC TO-I/A11/20/25 SC TO-I/ASC TO-I/A11/19/25