Keros Therapeutics, Inc. — Director's Dealing 2021

Apr 6, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Keros Therapeutics, Inc. (KROS)
CIK: 0001664710
Period of Report: 2021-04-01

Reporting Person: Knowles Julius (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-01	Common Stock	S	3790	$58.42	Disposed	626197	Indirect
2021-04-01	Common Stock	S	2472	$58.42	Disposed	418353	Indirect
2021-04-01	Common Stock	S	2350	$59.08	Disposed	623847	Indirect
2021-04-01	Common Stock	S	1533	$59.08	Disposed	416820	Indirect
2021-04-01	Common Stock	S	434	$60.82	Disposed	623413	Indirect
2021-04-01	Common Stock	S	283	$60.82	Disposed	416537	Indirect
2021-04-01	Common Stock	S	206	$61.36	Disposed	623207	Indirect
2021-04-01	Common Stock	S	134	$61.36	Disposed	416403	Indirect
2021-04-05	Common Stock	S	298	$58.66	Disposed	622909	Indirect
2021-04-05	Common Stock	S	195	$58.66	Disposed	416208	Indirect
2021-04-05	Common Stock	S	5445	$59.76	Disposed	617464	Indirect
2021-04-05	Common Stock	S	3551	$59.76	Disposed	412657	Indirect
2021-04-05	Common Stock	S	10690	$60.26	Disposed	606774	Indirect
2021-04-05	Common Stock	S	6972	$60.26	Disposed	405685	Indirect

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 $57.94 to $58.86 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), (5), (6), (7), (8), (9) and (10).

F3: The securities are held by Partners Innovation Fund, LLC ("PIF I"). Partners Innovation Fund, LLC ("Partners GP I") is the ultimate general partner of PIF I. The Reporting Person, a member of the board of directors of the Issuer, is a partner of Partners GP I and as a result, may be deemed to share voting and investment power with respect to the shares held by PIF I.

F4: The securities are held by Partners Innovation Fund II, L.P. ("PIF II"). Partners Innovation Fund II, LLC ("Partners GP II") is the ultimate general partner of PIF II. The Reporting Person, a member of the board of directors of the Issuer, is a partner of Partners GP II and as a result, may be deemed to share voting and investment power with respect to the shares held by PIF II.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $59.005 to $59.13 inclusive.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.20 to $61.19 inclusive.

F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.20 to $61.41 inclusive.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.02 to $59.00 inclusive.

F9: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $59.03 to $60.025 inclusive.

F10: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.03 to $60.75 inclusive.