Esther Cho - Aug 6, 2025 Form 3 Insider Report for Keros Therapeutics, Inc. (KROS)

Role
SVP, General Counsel
Signature
/s/ Esther Cho
Stock symbol
KROS
Transactions as of
Aug 6, 2025
Transactions value $
$0
Form type
3
Date filed
8/15/2025, 04:32 PM
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Cho Esther SVP, General Counsel C/O KEROS THERAPEUTICS, INC., 1050 WALTHAM STREET, SUITE 302, LEXINGTON /s/ Esther Cho 2025-08-15 0002081460

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding KROS Common Stock 44K Aug 6, 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding KROS Employee Stock Option (Right to Buy) Aug 6, 2025 Common Stock 21K $29.02 Direct F2
holding KROS Employee Stock Option (Right to Buy) Aug 6, 2025 Common Stock 20K $70.93 Direct F2
holding KROS Employee Stock Option (Right to Buy) Aug 6, 2025 Common Stock 25K $46.30 Direct F3
holding KROS Employee Stock Option (Right to Buy) Aug 6, 2025 Common Stock 50K $54.38 Direct F4
holding KROS Employee Stock Option (Right to Buy) Aug 6, 2025 Common Stock 50K $56.18 Direct F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents a restricted stock unit ("RSU") award. The RSUs vest as follows: 33% of the RSUs shall vest on February 17, 2026, an additional 34% of the total number of RSUs shall vest on August 15, 2026, and the remaining 33% of the total number of RSUs shall vest on February 16, 2027, in each case, subject to the Reporting Person continuing to provide service through each such date.
F2 Immediately exercisable.
F3 One-fourth (1/4th) of the shares subject to the option vested on January 19, 2023, and one-twelfth (1/12th) of the remaining shares subject to the option vested or shall vest in equal quarterly installments thereafter, subject to the Reporting Person continuing to provide service through each such date.
F4 One-fourth (1/4th) of the shares subject to the option vested on February 16, 2024, and one-twelfth (1/12th) of the remaining shares subject to the option vested or shall vest in equal quarterly installments thereafter, subject to the Reporting Person continuing to provide service through each such date.
F5 One-fourth (1/4th) of the shares subject to the option vested on February 13, 2025, and one-twelfth (1/12th) of the remaining shares subject to the option vested or shall vest in equal quarterly installments thereafter, subject to the Reporting Person continuing to provide service through each such date.