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CIK 0001664710 · Non-accelerated filer<br>Smaller reporting company

Keros Therapeutics, Inc.

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Ticker
KROS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Entity type
operating
EIN
811173868
Phone
617-314-6297
Business address
1050 WALTHAM STREET, SUITE 302, LEXINGTON, MA, 02421
Open-market buys, last 90 days
$10,270
in 1 filing
Open-market sales, last 90 days
$101,136
in 4 filings, $6K under 10b5-1 plans

Net −$90,866. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Cho Esther −$46K Chief Legal Officer sold 11% of stake
  2. Lerner Lorena Raquel −$37K Chief Scientific Officer sold 11% of stake
  3. Tanini Annita −$13K Corp. Controller & VP, Finance sold 3% of stake
  4. BIENAIME JEAN JACQUES +$10K Director 1 filing
  5. Newton Charles W. −$6K Director sold 4% of stake

Reading 78 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-01-07 Seehra Jasbir CHIEF EXECUTIVE OFFICER Grant or award · Employee Stock Option (right to buy) +62,500 62,500
2025-11-21 Knowles Julius Director Returned to the company −191,527 $17.75 $3.4M 150,047
2025-11-21 Knowles Julius Director Returned to the company −130,494 $17.75 $2.3M 102,233
2025-11-21 ORBIMED ADVISORS LLC Director Returned to the company −140,057 $17.75 $2.5M 759,155
2025-11-21 ORBIMED ADVISORS LLC Director Returned to the company −74,465 $17.75 $1.3M 45,057
2025-11-21 GORDON CARL L Director Returned to the company −140,057 $17.75 $2.5M 759,155
2025-11-21 GORDON CARL L Director Returned to the company −74,465 $17.75 $1.3M 45,057
2025-10-15 Pontifax Management 4 G.P. (2015) Ltd. 10% owner Sale −2,284,612 $17.75 $40.6M 0
2025-10-15 Pontifax Management 4 G.P. (2015) Ltd. 10% owner Sale −1,121,045 $17.75 $19.9M 0
2025-10-15 Pontifax Management 4 G.P. (2015) Ltd. 10% owner Sale −1,226,412 $17.75 $21.8M 0
2025-10-15 Pontifax Management 4 G.P. (2015) Ltd. 10% owner Sale −155,262 $17.75 $2.8M 0
2025-10-15 ADAR1 Capital Management, LLC 10% owner Sale −4,391,237 $17.75 $77.9M 0
2025-10-15 ADAR1 Capital Management, LLC 10% owner Sale −254,669 $17.75 $4.5M 0
2025-10-15 ADAR1 Capital Management, LLC 10% owner Sale −743,358 $17.75 $13.2M 0
2025-09-03 Seehra Jasbir CHIEF EXECUTIVE OFFICER Grant or award +90,500 392,723
2025-06-20 ADAR1 Capital Management, LLC 10% owner Option exercise −100 $60.00 $6K 4,392,637
2025-06-20 ADAR1 Capital Management, LLC 10% owner Option exercise −1,400 $70.00 $98K 4,391,237
2025-06-20 ADAR1 Capital Management, LLC 10% owner Option exercise −200 $70.00 $14K 743,358
2025-06-20 ADAR1 Capital Management, LLC 10% owner Option exercise · Put Option (right to sell) −1 0
2025-06-20 ADAR1 Capital Management, LLC 10% owner Option exercise · Put Option (right to sell) −14 0

Page 3 of 9 · 173 trades