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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
2026-08-18 Tanini Annita Corp. Controller & VP, Finance Sale −1,224 $10.29 $13K 45,144
2026-08-18 Cho Esther Chief Legal Officer Sale −4,485 $10.29 $46K 35,770
2026-08-18 Lerner Lorena Raquel Chief Scientific Officer Sale −3,568 $10.29 $37K 27,559
2026-08-18 Newton Charles W. Director Sale 10b5-1 −551 $10.30 $6K 12,114
2026-08-17 BIENAIME JEAN JACQUES Director Purchase 10b5-1 +1,000 $10.27 $10K 19,592
2026-07-15 BIENAIME JEAN JACQUES Director Purchase 10b5-1 +1,000 $10.61 $11K 18,592
2026-07-01 Prener Anne Director Grant or award +13,786 13,786
2026-07-01 Prener Anne Director Grant or award · Stock Option (right to buy) +14,870 14,870
2026-06-15 BIENAIME JEAN JACQUES Director Purchase 10b5-1 +1,000 $10.19 $10K 17,592
2026-06-11 Newton Charles W. Director Sale 10b5-1 −550 $10.04 $6K 12,665
2026-06-04 Knowles Julius Director Sale 10b5-1 −2,625 $10.73 $28K 10,958
2026-06-04 Farzan Nima Director Sale 10b5-1 −2,625 $10.73 $28K 9,767
2026-06-04 Seth Alpna Director Sale 10b5-1 −2,625 $10.72 $28K 9,767
2026-06-03 Knowles Julius Director Grant or award +7,142 13,583
2026-06-03 Knowles Julius Director Grant or award · Stock Option (right to buy) +7,433 7,433
2026-06-03 Farzan Nima Director Grant or award +7,142 12,392
2026-06-03 Farzan Nima Director Grant or award · Stock Option (right to buy) +7,433 7,433
2026-06-03 Seth Alpna Director Grant or award +7,142 12,392
2026-06-03 Seth Alpna Director Grant or award · Stock Option (right to buy) +7,433 7,433
2026-06-03 GRAY MARY ANN Director Grant or award +7,142 12,392

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