ATRA Insider Trading

Net Buying · 180d
Open-Market Buys (180d)
$4.7M
1 insiders
Open-Market Sells (180d)
$3.3M
3 insiders
Net Insider Flow
$1.5M
open market, 180d
Reporting Insiders
4
12 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.

Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
Jun 11, 2026Cherry Brian NDirectorGrant(A)24K$0
Jun 9, 2026Heiden William KDirectorGrant(A)12K$0
Jun 9, 2026Fust Matthew KDirectorGrant(A)12K$0
Jun 9, 2026Ciongoli Gregory AustinDirector, 10% OwnerGrant(A)12K$0
May 18, 2026Grant-Huerta YaninaChief Accounting OfficerSell(S)2K$9.13$22K
May 18, 2026Nguyen AnhCoPresident and CEO, DirectorSell(S)5K$9.13$48K
May 7, 2026EcoR1 Capital, LLC10% OwnerBuy(P)507K$9.35$4.7M
May 7, 2026Panacea Innovation Ltd10% OwnerSell(S)313K$10.10$3.2M
Mar 17, 2026Panacea Innovation Ltd10% OwnerOption exercise(M)259K$0
Mar 17, 2026Panacea Innovation Ltd10% OwnerTax withholding(F)5$5.23$26
Mar 17, 2026Panacea Innovation Ltd10% OwnerOption exercise(M)259K$6.61$1.7M
Mar 9, 2026Grant-Huerta YaninaChief Accounting OfficerGrant(A)20K$0
Mar 9, 2026Nguyen AnhCoPresident and CEO, DirectorGrant(A)81K$0
Mar 2, 2026Nguyen AnhCoPresident and CEO, DirectorSell(S)58$5.08$295
Mar 2, 2026Nguyen AnhCoPresident and CEO, DirectorSell(S)1K$5.09$7K
Mar 2, 2026Nguyen AnhCoPresident and CEO, DirectorSell(S)198$5.08$1K
Mar 2, 2026Nguyen AnhCoPresident and CEO, DirectorSell(S)1K$5.09$7K
Mar 2, 2026Grant-Huerta YaninaChief Accounting OfficerSell(S)377$5.08$2K
Mar 2, 2026Grant-Huerta YaninaChief Accounting OfficerSell(S)2K$5.08$8K
Mar 2, 2026Grant-Huerta YaninaChief Accounting OfficerSell(S)24$5.08$122
Mar 2, 2026Grant-Huerta YaninaChief Accounting OfficerSell(S)100$5.08$508
Jan 12, 2026Huang JamesDirector, 10% OwnerSell(S)81K$6.07$489K
Nov 28, 2025Panacea Innovation Ltd10% OwnerTax withholding(F)1$14.03$14
Nov 28, 2025Panacea Innovation Ltd10% OwnerOption exercise(M)49K$0
Nov 28, 2025Panacea Innovation Ltd10% OwnerOption exercise(M)49K$6.61$322K
Nov 17, 2025Grant-Huerta YaninaChief Accounting OfficerSell(S)2K$13.19$22K
Nov 17, 2025Grant-Huerta YaninaChief Accounting OfficerSell(S)74$13.19$976
Nov 17, 2025Grant-Huerta YaninaChief Accounting OfficerSell(S)85$13.19$1K
Nov 17, 2025Nguyen AnhCoPresident and CEO, DirectorSell(S)56$13.19$739
Nov 17, 2025Nguyen AnhCoPresident and CEO, DirectorSell(S)3K$13.19$38K
Aug 18, 2025Grant-Huerta YaninaChief Accounting OfficerSell(S)55$11.61$639
Aug 18, 2025Grant-Huerta YaninaChief Accounting OfficerSell(S)86$11.61$998
Aug 18, 2025Grant-Huerta YaninaChief Accounting OfficerSell(S)2K$11.61$19K
Aug 18, 2025Nguyen AnhCoPresident and CEO, DirectorSell(S)57$11.61$662
Aug 18, 2025Nguyen AnhCoPresident and CEO, DirectorSell(S)2K$11.62$19K
Aug 18, 2025Nguyen AnhCoPresident and CEO, DirectorSell(S)1K$11.62$15K
Aug 15, 2025Panacea Innovation Ltd10% OwnerBuy(P)55K$12.19$670K
Jul 17, 2025Huang JamesDirector, 10% OwnerBuy(P)19K$9.64$186K
Jun 10, 2025Heiden William KDirectorGrant(A)8K$0
Jun 10, 2025Mallik AmeetDirectorGrant(A)8K$0
Jun 10, 2025Roncarolo Maria GraziaDirectorGrant(A)8K$0
Jun 10, 2025Touchon PascalDirectorGrant(A)8K$0
Jun 10, 2025Fust Matthew KDirectorGrant(A)8K$0
Jun 10, 2025Gallagher Carol GiltnerDirectorGrant(A)8K$0
May 16, 2025Nguyen AnhCoPresident and CEO, DirectorSell(S)3K$6.76$22K
May 16, 2025Grant-Huerta YaninaChief Accounting OfficerSell(S)2K$6.76$15K
May 16, 2025Adiumentum Capital Fund I GP LLCDirector, 10% OwnerGrant(A)76K$6.61$500K
May 16, 2025Adiumentum Capital Fund I GP LLCDirector, 10% OwnerGrant(A)227K$6.61$1.5M
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)543$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)460$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)2K$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)9K$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)331$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)262$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)350$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)381$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)496$0
Mar 31, 2025Hyllengren Eric JInsiderDisposed to issuer(D)154$0
Mar 3, 2025Henrich JillEVP, Chief Regulatory OfficerSell(S)1K$7.00$7K
Mar 3, 2025Hyllengren Eric JEVP, CFO and COOSell(S)1K$7.00$8K
Mar 3, 2025Nguyen AnhCoPresident and CEO, DirectorSell(S)3K$7.00$23K
Jan 27, 2025Hyllengren Eric JEVP, CFO and COOGrant(A)34K$0
Nov 18, 2024Nguyen AnhCoPresident and CEO, DirectorSell(S)2K$11.20$19K
Nov 18, 2024Hyllengren Eric JEVP, CFO and COOSell(S)1K$11.20$15K
Nov 18, 2024Henrich JillEVP, Chief Regulatory OfficerSell(S)1K$11.20$11K
Sep 9, 2024Nguyen AnhCoPresident and CEO, DirectorGrant(A)45K$0
Aug 16, 2024Henrich JillEVP, Global Head RA & QualitySell(S)132$6.63$875
Aug 16, 2024Henrich JillEVP, Global Head RA & QualitySell(S)831$6.63$6K
Aug 16, 2024Hyllengren Eric JEVP, CFOSell(S)29$6.63$192
Aug 16, 2024Hyllengren Eric JEVP, CFOSell(S)1K$6.63$7K
Aug 16, 2024Murugan AmarEVP, Chief Legal OfficerSell(S)877$6.63$6K
Aug 16, 2024Murugan AmarEVP, Chief Legal OfficerSell(S)89$6.63$590
Aug 16, 2024Murugan AmarEVP, Chief Legal OfficerSell(S)192$6.63$1K
Aug 16, 2024Nguyen AnhCoEVP, Chief Sci. & Tech OfficerSell(S)297$6.63$2K
Aug 16, 2024Nguyen AnhCoEVP, Chief Sci. & Tech OfficerSell(S)1K$6.63$10K
Aug 16, 2024Nguyen AnhCoEVP, Chief Sci. & Tech OfficerSell(S)56$6.63$371
Aug 16, 2024Touchon PascalPresident and CEO, DirectorSell(S)276$6.63$2K
Aug 16, 2024Touchon PascalPresident and CEO, DirectorSell(S)3K$6.63$18K
Aug 12, 2024Touchon PascalPresident and CEO, DirectorDisposed to issuer(D)7K$0
Aug 12, 2024Touchon PascalPresident and CEO, DirectorDisposed to issuer(D)9K$0
Aug 12, 2024Touchon PascalPresident and CEO, DirectorDisposed to issuer(D)10K$0
May 16, 2024Henrich JillEVP, Global Head RA & QualitySell(S)26K$0.62$16K
May 16, 2024Hyllengren Eric JEVP, CFOSell(S)29K$0.62$18K
May 16, 2024Murugan AmarEVP, Chief Legal OfficerSell(S)32K$0.62$20K
May 16, 2024Nguyen AnhCoEVP, Chief Sci. & Tech OfficerSell(S)43K$0.62$27K
May 16, 2024Touchon PascalPresident and CEO, DirectorSell(S)82K$0.62$51K
Mar 31, 2024Mallik AmeetDirectorGrant(A)150K$0
Mar 31, 2024Gallagher Carol GiltnerDirectorGrant(A)150K$0
Mar 31, 2024Roncarolo Maria GraziaDirectorGrant(A)150K$0
Mar 31, 2024Heiden William KDirectorGrant(A)150K$0
Mar 31, 2024Fust Matthew KDirectorGrant(A)150K$0
Mar 4, 2024Henrich JillEVP, Global Head RA & QualitySell(S)4K$0.72$3K
Mar 4, 2024Hyllengren Eric JEVP, CFOSell(S)1K$0.72$1K
Mar 4, 2024Hyllengren Eric JEVP, CFOSell(S)5K$0.72$4K
Mar 4, 2024Murugan AmarEVP, Chief Legal OfficerSell(S)10K$0.72$7K
Mar 4, 2024Nguyen AnhCoEVP, Chief Sci. & Tech OfficerSell(S)11K$0.72$8K
Mar 4, 2024Touchon PascalPresident and CEO, DirectorSell(S)25K$0.72$18K
Jan 8, 2024Henrich JillEVP, Global Head RA & QualityGrant(A)450K$0
Jan 8, 2024Hyllengren Eric JEVP, CFOGrant(A)475K$0
Jan 8, 2024Murugan AmarEVP, Chief Legal OfficerGrant(A)475K$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 2021-03-292026-07-14. Earlier history is backfilling; this window widens as it deepens.

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