Arkolith/Insider Trading/KROS

KROS Insider Trading

Keros Therapeutics, Inc. · full profile →Last filing Jul 15, 2026
Net Selling · 180d
Open-Market Buys (180d)
$66K
1 insiders
Open-Market Sells (180d)
$422K
8 insiders
Net Insider Flow
-$356K
open market, 180d
Reporting Insiders
9
13 P/S transactions
Build

Build on these Form 4 transactions

The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.

Form 4 insider API

Open-market buys and sells, cluster scans, company flows.

insider.transactions

13F holdings API

Owners, holdings, deltas, point-in-time portfolios.

stock.owners

MCP quickstart

Connect an agent, mint a key, make the first call.

/api/mcp

Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
Jul 15, 2026Bienaime Jean JacquesDirectorBuy(P)1K$10.61$11K
Jul 1, 2026Prener AnneDirectorGrant(A)14K—$0
Jul 1, 2026Prener AnneDirectorGrant(A)15K—$0
Jun 15, 2026Bienaime Jean JacquesDirectorBuy(P)1K$10.19$10K
Jun 11, 2026Newton Charles W.DirectorSell(S)550$10.04$6K
Jun 4, 2026Seth AlpnaDirectorSell(S)3K$10.72$28K
Jun 4, 2026Farzan NimaDirectorSell(S)3K$10.73$28K
Jun 4, 2026Knowles JuliusDirectorSell(S)3K$10.73$28K
Jun 3, 2026Gray Mary AnnDirectorGrant(A)7K—$0
Jun 3, 2026Gray Mary AnnDirectorGrant(A)7K—$0
Jun 3, 2026Seth AlpnaDirectorGrant(A)7K—$0
Jun 3, 2026Seth AlpnaDirectorGrant(A)7K—$0
Jun 3, 2026Bienaime Jean JacquesDirectorGrant(A)7K—$0
Jun 3, 2026Bienaime Jean JacquesDirectorGrant(A)7K—$0
Jun 3, 2026Knowles JuliusDirectorGrant(A)7K—$0
Jun 3, 2026Knowles JuliusDirectorGrant(A)7K—$0
Jun 3, 2026Farzan NimaDirectorGrant(A)7K—$0
Jun 3, 2026Farzan NimaDirectorGrant(A)7K—$0
May 15, 2026Bienaime Jean JacquesDirectorBuy(P)1K$10.58$11K
Apr 15, 2026Bienaime Jean JacquesDirectorBuy(P)1K$11.70$12K
Apr 2, 2026Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorOption exercise(M)55K$0.30$17K
Apr 2, 2026Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorOption exercise(M)55K—$0
Mar 9, 2026Bienaime Jean JacquesDirectorBuy(P)2K$11.21$22K
Mar 9, 2026Newton Charles W.DirectorGrant(A)13K—$0
Mar 9, 2026Newton Charles W.DirectorGrant(A)15K—$0
Feb 24, 2026Regnante KeithCHIEF FINANCIAL OFFICERGrant(A)60K—$0
Feb 24, 2026Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorGrant(A)217K—$0
Feb 24, 2026Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorGrant(A)100K—$0
Feb 24, 2026Lerner Lorena RaquelChief Scientific OfficerGrant(A)75K—$0
Feb 24, 2026Cho EstherChief Legal OfficerGrant(A)80K—$0
Feb 19, 2026Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorSell(S)7K$16.17$113K
Feb 18, 2026Regnante KeithCHIEF FINANCIAL OFFICERSell(S)5K$16.35$77K
Feb 18, 2026Lerner Lorena RaquelChief Science OfficerSell(S)4K$16.35$63K
Feb 18, 2026Cho EstherSVP, General CounselSell(S)5K$16.35$78K
Jan 7, 2026Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorGrant(A)63K—$0
Nov 21, 2025Gordon Carl LDirectorDisposed to issuer(D)74K$17.75$1.3M
Nov 21, 2025Gordon Carl LDirectorDisposed to issuer(D)140K$17.75$2.5M
Nov 21, 2025OrbiMed Genesis GP LLCDirectorDisposed to issuer(D)140K$17.75$2.5M
Nov 21, 2025OrbiMed Genesis GP LLCDirectorDisposed to issuer(D)74K$17.75$1.3M
Nov 21, 2025Knowles JuliusDirectorDisposed to issuer(D)192K$17.75$3.4M
Nov 21, 2025Knowles JuliusDirectorDisposed to issuer(D)130K$17.75$2.3M
Oct 15, 2025Schneeberger Daniel10% OwnerSell(S)255K$17.75$4.5M
Oct 15, 2025Schneeberger Daniel10% OwnerSell(S)4.4M$17.75$77.9M
Oct 15, 2025Schneeberger Daniel10% OwnerSell(S)743K$17.75$13.2M
Oct 15, 2025Pontifax (China) IV L.P.10% OwnerSell(S)2.3M$17.75$40.6M
Oct 15, 2025Pontifax (China) IV L.P.10% OwnerSell(S)155K$17.75$2.8M
Oct 15, 2025Pontifax (China) IV L.P.10% OwnerSell(S)1.2M$17.75$21.8M
Oct 15, 2025Pontifax (China) IV L.P.10% OwnerSell(S)1.1M$17.75$19.9M
Sep 3, 2025Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorGrant(A)91K—$0
Jun 20, 2025Schneeberger Daniel10% OwnerOption exercise(X)1K$70.00$98K
Jun 20, 2025Schneeberger Daniel10% OwnerOption exercise(X)100$60.00$6K
Jun 20, 2025Schneeberger Daniel10% OwnerOption exercise(X)200$70.00$14K
Jun 20, 2025Schneeberger Daniel10% OwnerOption exercise(X)1—$0
Jun 20, 2025Schneeberger Daniel10% OwnerOption exercise(X)14—$0
Jun 20, 2025Schneeberger Daniel10% OwnerOption exercise(X)2—$0
Jun 4, 2025Bienaime Jean JacquesDirectorGrant(A)5K—$0
Jun 4, 2025Bienaime Jean JacquesDirectorGrant(A)11K—$0
Jun 4, 2025Farzan NimaDirectorGrant(A)5K—$0
Jun 4, 2025Farzan NimaDirectorGrant(A)11K—$0
Jun 4, 2025Gray Mary AnnDirectorGrant(A)5K—$0
Jun 4, 2025Gray Mary AnnDirectorGrant(A)11K—$0
Jun 4, 2025Seth AlpnaDirectorGrant(A)5K—$0
Jun 4, 2025Seth AlpnaDirectorGrant(A)11K—$0
Jun 4, 2025Nussbaum RanDirector, 10% OwnerGrant(A)5K—$0
Jun 4, 2025Nussbaum RanDirector, 10% OwnerGrant(A)11K—$0
Jun 4, 2025Kariv TomerDirector, 10% OwnerGrant(A)5K—$0
Jun 4, 2025Kariv TomerDirector, 10% OwnerGrant(A)11K—$0
Jun 4, 2025Gordon Carl LDirectorGrant(A)5K—$0
Jun 4, 2025Gordon Carl LDirectorGrant(A)11K—$0
Jun 4, 2025Knowles JuliusDirectorGrant(A)5K—$0
Jun 4, 2025Knowles JuliusDirectorGrant(A)11K—$0
May 16, 2025ADAR1 Capital Management, LLC10% OwnerExpiration(E)836—$0
May 16, 2025ADAR1 Capital Management, LLC10% OwnerExpiration(E)300—$0
May 16, 2025ADAR1 Capital Management, LLC10% OwnerExpiration(E)178—$0
Apr 9, 2025ADAR1 Partners, LP10% OwnerBuy(P)500K$10.33$5.2M
Apr 9, 2025ADAR1 Partners, LP10% OwnerBuy(P)325K$9.86$3.2M
Apr 9, 2025ADAR1 Partners, LP10% OwnerBuy(P)16K$9.40$154K
Apr 9, 2025ADAR1 Partners, LP10% OwnerBuy(P)19K$9.40$174K
Apr 9, 2025ADAR1 Partners, LP10% OwnerBuy(P)74K$10.33$768K
Apr 9, 2025ADAR1 Partners, LP10% OwnerOther(J)74K——
Apr 9, 2025ADAR1 Partners, LP10% OwnerOther(J)500K——
Apr 9, 2025ADAR1 Partners, LP10% OwnerOther(J)325K——
Apr 4, 2025Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorOption exercise(M)49K$0.30$15K
Apr 4, 2025Seehra JasbirCHIEF EXECUTIVE OFFICER, DirectorOption exercise(M)49K—$0
Feb 18, 2025Rovaldi ChristopherChief Operating OfficerGrant(A)60K—$0
Feb 18, 2025Regnante KeithCHIEF FINANCIAL OFFICERGrant(A)44K—$0
Feb 18, 2025Chyung Yung H.Chief Medical OfficerGrant(A)44K—$0
Nov 8, 2024Chyung Yung H.Chief Medical OfficerGrant(A)110K—$0
Aug 13, 2024OrbiMed Genesis GP LLCDirectorSell(S)29K$44.01$1.3M
Aug 13, 2024OrbiMed Genesis GP LLCDirectorSell(S)221K$44.01$9.7M
Aug 13, 2024Gordon Carl LDirectorSell(S)221K$44.01$9.7M
Aug 13, 2024Gordon Carl LDirectorSell(S)29K$44.01$1.3M
Jun 3, 2024Bienaime Jean JacquesDirectorGrant(A)18K—$0
May 30, 2024Farzan NimaDirectorGrant(A)10K—$0
May 30, 2024Gordon Carl LDirectorGrant(A)10K—$0
May 30, 2024Gray Mary AnnDirectorGrant(A)10K—$0
May 30, 2024Knowles JuliusDirectorGrant(A)10K—$0
May 30, 2024Nussbaum RanDirector, 10% OwnerGrant(A)10K—$0
May 30, 2024Kariv TomerDirector, 10% OwnerGrant(A)10K—$0
May 30, 2024Seth AlpnaDirectorGrant(A)10K—$0

Data Source

Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.

Coverage: Form 4 filings indexed 2021-01-04 → 2026-07-21. Earlier history is backfilling; this window widens as it deepens.

Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).