Keros Therapeutics, Inc. — Director's Dealing 2021

Dec 15, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Keros Therapeutics, Inc. (KROS)
CIK: 0001664710
Period of Report: 2021-12-13

Reporting Person: Lachey Jennifer (Chief Scientific Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-13	Common Stock	M	1915	$0.30	Acquired	87615	Direct
2021-12-13	Common Stock	S	1518	$50.11	Disposed	86097	Direct
2021-12-13	Common Stock	S	390	$52.22	Disposed	85707	Direct
2021-12-13	Common Stock	S	7	$53.64	Disposed	85700	Direct
2021-12-15	Common Stock	M	735	$0.30	Acquired	86435	Direct
2021-12-15	Common Stock	S	735	$50.00	Disposed	85700	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-13	Employee Stock Option (right to buy)	$0.30	M	1915	Disposed	2028-03-25	Common Stock (1915)	Direct
2021-12-15	Employee Stock Option (right to buy)	$0.30	M	735	Disposed	2028-03-25	Common Stock (735)	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.00 to $50.495 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (3).

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.06 to $52.86 inclusive.

F4: Immediately exercisable.