Keros Therapeutics, Inc. ($KROS) Insider Transactions

Last updated: 2026-03-27 23:00 UTC | Total transactions: 113

In the last 12 months, insiders at Keros Therapeutics, Inc. ($KROS) filed 113 transactions with the SEC: 7 open-market purchases totaling $9,511,919 and 22 sales totaling $208,458,820. Net insider sentiment: net selling.

Keros Therapeutics, Inc. operates in the Pharmaceutical preparations industry (Life sciences sector).

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View all SEC Filings for Keros Therapeutics, Inc. (KROS).

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Recent Insider Transactions

Transaction Date Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Feb. 24, 2026 Cho Esther Chief Legal Officer A Employee Stock Option (Right to Buy) 80000 $0.00 80,000.0000 41,202,371 9999.99% 0.19%
March 9, 2026 BIENAIME JEAN JACQUES Not found P Common Stock 2000 $11.21 7,450.0000 41,202,371 36.70% 0.00%
March 9, 2026 Newton Charles W. Not found A Common Stock 13215 $0.00 13,215.0000 41,202,371 9999.99% 0.03%
March 9, 2026 Newton Charles W. Not found A Stock Option (Right to Buy) 14788 $0.00 14,788.0000 41,202,371 9999.99% 0.04%
Feb. 24, 2026 Regnante Keith CHIEF FINANCIAL OFFICER A Employee Stock Option (Right to Buy) 60000 $0.00 60,000.0000 41,202,371 9999.99% 0.15%
Feb. 24, 2026 Cho Esther Chief Legal Officer A Employee Stock Option (Right to Buy) 80000 $0.00 80,000.0000 41,202,371 9999.99% 0.19%
Feb. 24, 2026 Lerner Lorena Raquel Chief Scientific Officer A Employee Stock Option (Right to Buy) 75000 $0.00 75,000.0000 41,202,371 9999.99% 0.18%
Feb. 24, 2026 Seehra Jasbir CHIEF EXECUTIVE OFFICER A Employee Stock Option (Right to Buy) 217000 $0.00 217,000.0000 41,202,371 9999.99% 0.53%
Feb. 24, 2026 Seehra Jasbir CHIEF EXECUTIVE OFFICER A Employee Stock Option (right to buy) 100000 $0.00 100,000.0000 41,202,371 9999.99% 0.24%
Feb. 18, 2026 Regnante Keith CHIEF FINANCIAL OFFICER S Common Stock 4739 $16.35 39,261.0000 41,202,371 10.77% 0.01%
Feb. 18, 2026 Lerner Lorena Raquel Chief Science Officer S Common Stock 3873 $16.35 31,127.0000 41,202,371 11.07% 0.01%
Feb. 18, 2026 Cho Esther SVP, General Counsel S Common Stock 4745 $16.35 39,755.0000 41,202,371 10.66% 0.01%
Feb. 19, 2026 Seehra Jasbir CHIEF EXECUTIVE OFFICER S Common Stock 7015 $16.17 385,708.0000 41,202,371 1.79% 0.02%
Jan. 7, 2026 Seehra Jasbir CHIEF EXECUTIVE OFFICER A Employee Stock Option (right to buy) 62500 $0.00 62,500.0000 41,202,371 9999.99% 0.15%
Nov. 21, 2025 Knowles Julius Not found D Common Stock 191527 $17.75 156,488.0000 41,202,371 55.03% 0.46%
Nov. 21, 2025 Knowles Julius Not found D Common Stock 130494 $17.75 108,674.0000 41,202,371 54.56% 0.32%
Nov. 21, 2025 ORBIMED ADVISORS LLC Director D Common Stock 140057 $17.75 759,155.0000 41,202,371 15.58% 0.34%
Nov. 21, 2025 GORDON CARL L Director D Common Stock 140057 $17.75 759,155.0000 41,202,371 15.58% 0.34%
Nov. 21, 2025 ORBIMED ADVISORS LLC Director D Common Stock 74465 $17.75 45,057.0000 41,202,371 62.30% 0.18%
Nov. 21, 2025 GORDON CARL L Director D Common Stock 74465 $17.75 45,057.0000 41,202,371 62.30% 0.18%
Oct. 15, 2025 Pontifax Management 4 G.P. (2015) Ltd. TenPercentOwner S Common Stock, $0.0001 par value per share 1121045 $17.75 10,500.0000 41,202,371 99.07% 2.72%
Oct. 15, 2025 Pontifax Management 4 G.P. (2015) Ltd. TenPercentOwner S Common Stock, $0.0001 par value per share 2284612 $17.75 10,500.0000 41,202,371 99.54% 5.54%
Oct. 15, 2025 Pontifax Management 4 G.P. (2015) Ltd. TenPercentOwner S Common Stock, $0.0001 par value per share 1226412 $17.75 10,500.0000 41,202,371 99.15% 2.98%
Oct. 15, 2025 Pontifax Management 4 G.P. (2015) Ltd. TenPercentOwner S Common Stock, $0.0001 par value per share 155262 $17.75 10,500.0000 41,202,371 93.67% 0.38%
Oct. 15, 2025 ADAR1 Capital Management, LLC TenPercentOwner S Common Stock 254669 $17.75 0.0000 41,202,371 100.00% 0.62%
Oct. 15, 2025 ADAR1 Capital Management, LLC TenPercentOwner S Common Stock 4391237 $17.75 0.0000 41,202,371 100.00% 10.66%
Oct. 15, 2025 ADAR1 Capital Management, LLC TenPercentOwner S Common Stock 743358 $17.75 0.0000 41,202,371 100.00% 1.80%
Sept. 3, 2025 Seehra Jasbir CHIEF EXECUTIVE OFFICER A Common Stock 90500 $0.00 392,723.0000 37,437,652 29.94% 0.24%
June 20, 2025 ADAR1 Capital Management, LLC TenPercentOwner X Common Stock 100 $60.00 5,135,995.0000 37,437,652 0.00% 0.00%
June 20, 2025 ADAR1 Capital Management, LLC TenPercentOwner X Common Stock 200 $70.00 5,134,595.0000 37,437,652 0.00% 0.00%
June 20, 2025 ADAR1 Capital Management, LLC TenPercentOwner X Common Stock 1400 $70.00 5,134,595.0000 37,437,652 0.03% 0.00%
June 20, 2025 ADAR1 Capital Management, LLC TenPercentOwner X Put Option (right to sell) 14 $0.00 0.0000 37,437,652 100.00% 0.00%
June 20, 2025 ADAR1 Capital Management, LLC TenPercentOwner X Put Option (right to sell) 2 $0.00 0.0000 37,437,652 100.00% 0.00%
June 20, 2025 ADAR1 Capital Management, LLC TenPercentOwner X Put Option (right to sell) 1 $0.00 0.0000 37,437,652 100.00% 0.00%
May 16, 2025 ADAR1 Capital Management, LLC TenPercentOwner E Put Option (obligation to buy) 178 $0.00 0.0000 37,437,652 100.00% 0.00%
May 16, 2025 ADAR1 Capital Management, LLC TenPercentOwner E Put Option (obligation to buy) 300 $0.00 0.0000 37,437,652 100.00% 0.00%
May 16, 2025 ADAR1 Capital Management, LLC TenPercentOwner E Put Option (obligation to buy) 836 $0.00 0.0000 37,437,652 100.00% 0.00%
June 4, 2025 Knowles Julius Not found A Common Stock 5250 $0.00 580,742.0000 37,437,652 0.91% 0.01%
June 4, 2025 BIENAIME JEAN JACQUES Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
June 4, 2025 BIENAIME JEAN JACQUES Not found A Common Stock 5250 $0.00 5,450.0000 37,437,652 2625.00% 0.01%
June 4, 2025 GRAY MARY ANN Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
June 4, 2025 GRAY MARY ANN Not found A Common Stock 5250 $0.00 5,250.0000 37,437,652 9999.99% 0.01%
June 4, 2025 Seth Alpna Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
June 4, 2025 Seth Alpna Not found A Common Stock 5250 $0.00 5,250.0000 37,437,652 9999.99% 0.01%
June 4, 2025 Nussbaum Ran Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
June 4, 2025 Nussbaum Ran Not found A Common Stock 5250 $0.00 4,637,319.0000 37,437,652 0.11% 0.01%
June 4, 2025 Farzan Nima Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
June 4, 2025 Farzan Nima Not found A Common Stock 5250 $0.00 5,250.0000 37,437,652 9999.99% 0.01%
June 4, 2025 Kariv Tomer Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
June 4, 2025 Kariv Tomer Not found A Common Stock 5250 $0.00 4,637,319.0000 37,437,652 0.11% 0.01%
June 4, 2025 GORDON CARL L Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
June 4, 2025 GORDON CARL L Not found A Common Stock 5250 $0.00 1,023,984.0000 37,437,652 0.52% 0.01%
June 4, 2025 Knowles Julius Not found A Stock Option (right to buy) 10500 $0.00 10,500.0000 37,437,652 9999.99% 0.03%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner P Common Stock 18560 $9.40 4,491,631.0000 37,437,652 0.41% 0.05%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner J Cash Settled Total Return Swaps 74333 $0.00 50,000.0000 37,437,652 59.79% 0.20%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner J Cash-Settled Total Return Swaps 500000 $0.00 124,333.0000 37,437,652 80.09% 1.34%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner J Cash-Settled Total Return Swaps 325000 $0.00 624,333.0000 37,437,652 34.23% 0.87%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner P Common Stock 74333 $10.33 5,390,964.0000 37,437,652 1.40% 0.20%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner P Common Stock 500000 $10.33 5,316,631.0000 37,437,652 10.38% 1.34%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner P Common Stock 325000 $9.86 4,816,631.0000 37,437,652 7.24% 0.87%
April 9, 2025 ADAR1 Capital Management, LLC TenPercentOwner P Common Stock 16365 $9.40 5,390,964.0000 37,437,652 0.30% 0.04%
April 4, 2025 Seehra Jasbir CHIEF EXECUTIVE OFFICER M Common Stock 49367 $0.30 302,223.0000 37,437,652 19.52% 0.13%
April 4, 2025 Seehra Jasbir CHIEF EXECUTIVE OFFICER M Employee Stock Option (right to buy) 49367 $0.00 252,444.0000 37,437,652 16.36% 0.13%
Feb. 18, 2025 CHYUNG YUNG H. Chief Medical Officer A Common Stock 44000 $0.00 44,000.0000 37,437,652 9999.99% 0.12%
Feb. 18, 2025 Rovaldi Christopher Chief Operating Officer A Common Stock 60000 $0.00 60,000.0000 37,437,652 9999.99% 0.16%
Feb. 18, 2025 Regnante Keith CHIEF FINANCIAL OFFICER A Common Stock 44000 $0.00 44,000.0000 37,437,652 9999.99% 0.12%
Jan. 4, 2024 Regnante Keith CHIEF FINANCIAL OFFICER S Common Stock 40000 $45.29 0.0000 29,447,119 100.00% 0.14%
Jan. 4, 2024 Regnante Keith CHIEF FINANCIAL OFFICER M Common Stock 40000 $16.00 40,000.0000 29,447,119 9999.99% 0.14%
Nov. 8, 2024 CHYUNG YUNG H. Chief Medical Officer A Employee Stock Option (right to buy) 110000 $0.00 110,000.0000 37,590,727 9999.99% 0.29%
Aug. 13, 2024 ORBIMED ADVISORS LLC Director S Common Stock 29400 $44.01 119,522.0000 29,447,119 19.74% 0.10%
Aug. 13, 2024 GORDON CARL L Director S Common Stock 220600 $44.01 899,212.0000 29,447,119 19.70% 0.75%
Aug. 13, 2024 GORDON CARL L Director S Common Stock 29400 $44.01 119,522.0000 29,447,119 19.74% 0.10%
Aug. 13, 2024 ORBIMED ADVISORS LLC Director S Common Stock 220600 $44.01 899,212.0000 29,447,119 19.70% 0.75%
June 3, 2024 BIENAIME JEAN JACQUES Not found A Stock Option (right to buy) 17600 $0.00 17,600.0000 29,447,119 9999.99% 0.06%
May 30, 2024 Farzan Nima Not found A Stock Option (right to buy) 10000 $0.00 10,000.0000 29,447,119 9999.99% 0.03%
May 30, 2024 Seth Alpna Not found A Stock Option (right to buy) 10000 $0.00 10,000.0000 29,447,119 9999.99% 0.03%
May 30, 2024 GORDON CARL L Not found A Stock Option (right to buy) 10000 $0.00 10,000.0000 29,447,119 9999.99% 0.03%
May 30, 2024 Kariv Tomer Not found A Stock Option (right to buy) 10000 $0.00 10,000.0000 29,447,119 9999.99% 0.03%
May 30, 2024 Nussbaum Ran Not found A Stock Option (right to buy) 10000 $0.00 10,000.0000 29,447,119 9999.99% 0.03%
May 30, 2024 GRAY MARY ANN Not found A Stock Option (right to buy) 10000 $0.00 10,000.0000 29,447,119 9999.99% 0.03%
May 30, 2024 Knowles Julius Not found A Stock Option (right to buy) 10000 $0.00 10,000.0000 29,447,119 9999.99% 0.03%
Feb. 23, 2024 Seehra Jasbir CHIEF EXECUTIVE OFFICER A Employee Stock Option (right to buy) 125000 $0.00 125,000.0000 29,447,119 9999.99% 0.42%
Feb. 13, 2024 Cooper Simon Peter CHIEF MEDICAL OFFICER A Employee Stock Option (right to buy) 40000 $0.00 40,000.0000 29,447,119 9999.99% 0.14%
Feb. 13, 2024 Rovaldi Christopher CHIEF OPERATING OFFICER A Employee Stock Option (right to buy) 150000 $0.00 150,000.0000 29,447,119 9999.99% 0.51%
Feb. 13, 2024 Regnante Keith CHIEF FINANCIAL OFFICER A Employee Stock Option (right to buy) 40000 $0.00 40,000.0000 29,447,119 9999.99% 0.14%
Feb. 13, 2024 Seehra Jasbir CHIEF EXECUTIVE OFFICER A Employee Stock Option (right to buy) 125000 $0.00 125,000.0000 29,447,119 9999.99% 0.42%
Jan. 4, 2024 Regnante Keith Chief Financial Officer M Employee Stock Option (right to buy) 40000 $0.00 53,622.0000 29,447,119 42.73% 0.14%
Nov. 4, 2023 Regnante Keith Chief Financial Officer M Common Stock 40000 $16.00 40,000.0000 25,241,030 9999.99% 0.16%
Nov. 4, 2023 Regnante Keith Chief Financial Officer S Common Stock 40000 $45.29 0.0000 25,241,030 100.00% 0.16%
June 9, 2023 Regnante Keith Chief Financial Officer M Common Stock 20000 $16.00 20,000.0000 25,241,030 9999.99% 0.08%
June 9, 2023 Regnante Keith Chief Financial Officer M Employee Stock Option (right to buy) 20000 $0.00 93,622.0000 25,241,030 17.60% 0.08%
June 8, 2023 Regnante Keith Chief Financial Officer M Employee Stock Option (right to buy) 20000 $0.00 113,622.0000 25,241,030 14.97% 0.08%
June 9, 2023 Regnante Keith Chief Financial Officer S Common Stock 2579 $47.25 0.0000 25,241,030 100.00% 0.01%
June 9, 2023 Regnante Keith Chief Financial Officer S Common Stock 1428 $46.46 2,579.0000 25,241,030 35.64% 0.01%
June 9, 2023 Regnante Keith Chief Financial Officer S Common Stock 15993 $45.03 4,007.0000 25,241,030 79.97% 0.06%
June 8, 2023 Regnante Keith Chief Financial Officer S Common Stock 2699 $48.65 0.0000 25,241,030 100.00% 0.01%
June 8, 2023 Regnante Keith Chief Financial Officer S Common Stock 17301 $47.66 2,699.0000 25,241,030 86.51% 0.07%
June 8, 2023 Regnante Keith Chief Financial Officer M Common Stock 20000 $16.00 20,000.0000 25,241,030 9999.99% 0.08%
June 6, 2023 GORDON CARL L Director A Stock Option (right to buy) 10000 $0.00 10,000.0000 25,241,030 9999.99% 0.04%
June 6, 2023 Farzan Nima Director A Stock Option (right to buy) 10000 $0.00 10,000.0000 25,241,030 9999.99% 0.04%
June 6, 2023 GRAY MARY ANN Director A Stock Option (right to buy) 10000 $0.00 10,000.0000 25,241,030 9999.99% 0.04%
June 6, 2023 Knowles Julius Director A Stock Option (right to buy) 10000 $0.00 10,000.0000 25,241,030 9999.99% 0.04%
June 6, 2023 Nussbaum Ran Director A Stock Option (right to buy) 10000 $0.00 10,000.0000 25,241,030 9999.99% 0.04%
June 6, 2023 Kariv Tomer Director A Stock Option (right to buy) 10000 $0.00 10,000.0000 25,241,030 9999.99% 0.04%
June 6, 2023 Seth Alpna Director A Stock Option (right to buy) 10000 $0.00 10,000.0000 25,241,030 9999.99% 0.04%
May 1, 2023 Seth Alpna Director A Stock Option (right to buy) 20000 $0.00 20,000.0000 25,241,030 9999.99% 0.08%
April 8, 2023 Seehra Jasbir Chief Executive Officer M Common Stock 4000 $0.48 252,856.0000 25,241,030 1.61% 0.02%
April 8, 2023 Seehra Jasbir Chief Executive Officer M Employee Stock Option (right to buy) 4000 $0.00 45,087.0000 25,241,030 8.15% 0.02%
Feb. 16, 2023 Seehra Jasbir Chief Executive Officer A Employee Stock Option (right to buy) 200000 $0.00 200,000.0000 25,241,030 9999.99% 0.79%
Feb. 16, 2023 Regnante Keith Chief Financial Officer A Employee Stock Option (right to buy) 40000 $0.00 40,000.0000 25,241,030 9999.99% 0.16%
Feb. 16, 2023 Cooper Simon Peter Chief Medical Officer A Employee Stock Option (right to buy) 40000 $0.00 40,000.0000 25,241,030 9999.99% 0.16%
Feb. 16, 2023 Rovaldi Christopher Chief Operating Officer A Employee Stock Option (right to buy) 100000 $0.00 100,000.0000 25,241,030 9999.99% 0.40%
April 13, 2020 Knowles Julius Director P Common Stock 1191 $20.98 575,492.0000 0 0.21% 0.00%