RLYB Insider Trading

Rallybio Corp · full profile →Last filing Jul 6, 2026
Net Buying · 180d
Open-Market Buys (180d)
$4.2M
1 insiders
Open-Market Sells (180d)
$4K
1 insiders
Net Insider Flow
$4.2M
open market, 180d
Reporting Insiders
2
15 P/S transactions
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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
Jul 6, 2026Boudreau Helen MDirectorOption exercise(M)4K$2.38$8K
Jul 6, 2026Boudreau Helen MDirectorOption exercise(M)4K$0
May 19, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)10K$13.98$140K
May 19, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)200$13.80$3K
May 18, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)6K$13.98$84K
May 15, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)100$13.80$1K
May 15, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)200$13.95$3K
May 13, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)4K$13.80$56K
May 13, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)75K$14.00$1.1M
May 12, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)800$13.83$11K
May 11, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)5K$14.00$71K
May 11, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)25K$14.00$350K
May 11, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)20K$14.00$279K
May 5, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)35K$14.00$491K
May 4, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)4K$13.90$54K
May 4, 2026ADAR1 Capital Management, LLC10% OwnerBuy(P)117K$13.97$1.6M
Feb 23, 2026Lieber Jonathan IChief Financial OfficerSell(S)789$5.06$4K
Feb 18, 2026Mackay MartinDirectorGrant(A)18K$3.60$65K
Feb 18, 2026Hunt RonaldDirectorGrant(A)14K$3.60$51K
Feb 18, 2026Lieber Jonathan IChief Financial OfficerGrant(A)3K$0
May 13, 2025Mackay MartinDirectorGrant(A)29K$0
May 13, 2025Liu HuiDirectorGrant(A)29K$0
May 13, 2025Soteropoulos PaulaDirectorGrant(A)29K$0
May 13, 2025Hopfner Robert LorneDirectorGrant(A)29K$0
May 13, 2025Nash Christine ADirectorGrant(A)29K$0
May 13, 2025Hunt RonaldDirectorGrant(A)29K$0
May 13, 2025Chung WendyDirectorGrant(A)29K$0
May 13, 2025Boudreau Helen MDirectorGrant(A)29K$0
Feb 14, 2025Lieber Jonathan IChief Financial OfficerGrant(A)180K$0
Feb 14, 2025Ryder StevenChief Medical OfficerGrant(A)180K$0
Feb 14, 2025Uden StephenChief Executive Officer, DirectorGrant(A)454K$0
Jan 2, 2025Liu HuiDirectorGrant(A)68K$0.70$47K
Jan 2, 2025Hopfner Robert LorneDirectorGrant(A)74K$0.70$51K
Jan 2, 2025Hunt RonaldDirectorGrant(A)74K$0.70$51K
Jan 2, 2025Mackay MartinDirectorGrant(A)93K$0.70$65K
May 15, 2024Chung WendyDirectorGrant(A)17K$0
May 15, 2024Hopfner Robert LorneDirectorGrant(A)17K$0
May 15, 2024Nash Christine ADirectorGrant(A)17K$0
May 15, 2024Soteropoulos PaulaDirectorGrant(A)17K$0
May 15, 2024Parmar KushDirectorGrant(A)17K$0
May 15, 2024Liu HuiDirectorGrant(A)17K$0
May 15, 2024Boudreau Helen MDirectorGrant(A)17K$0
May 15, 2024Hunt RonaldDirectorGrant(A)17K$0
Feb 15, 2024Ryder StevenChief Medical OfficerGrant(A)120K$0
Feb 15, 2024Lieber Jonathan IChief Financial OfficerGrant(A)120K$0
Feb 15, 2024Mackay MartinExecutive Chairman, DirectorGrant(A)216K$0
Feb 15, 2024Uden StephenChief Executive Officer, DirectorGrant(A)216K$0
Jan 2, 2024Hunt RonaldDirectorGrant(A)29K$1.77$51K
Jan 2, 2024Parmar KushDirectorGrant(A)27K$1.77$48K
May 17, 2023Chung WendyDirectorGrant(A)12K$0
May 17, 2023Hunt RonaldDirectorGrant(A)15K$0
May 17, 2023Liu HuiDirectorGrant(A)15K$0
May 17, 2023Soteropoulos PaulaDirectorGrant(A)15K$0
May 17, 2023Hopfner Robert LorneDirectorGrant(A)15K$0
May 17, 2023Boudreau Helen MDirectorGrant(A)15K$0
May 17, 2023Nash Christine ADirectorGrant(A)15K$0
May 17, 2023Parmar KushDirectorGrant(A)15K$0
Mar 14, 2023Lieber Jonathan ISee RemarksBuy(P)5K$5.21$26K
Mar 7, 2023Schwab Andrew J.10% OwnerSell(S)100K$8.20$820K
Mar 7, 2023Parmar KushDirectorSell(S)100K$8.20$820K
Feb 6, 2023Mackay MartinChief Executive Officer, DirectorGrant(A)214K$0
Feb 6, 2023Ryder StevenChief Medical OfficerGrant(A)119K$0
Feb 6, 2023Uden StephenSee RemarksGrant(A)214K$0
Feb 1, 2023Lieber Jonathan ISee RemarksGrant(A)240K$0
Jan 3, 2023Hunt RonaldDirectorGrant(A)11K$0
Jan 3, 2023Chung WendyDirectorGrant(A)9K$0
Jan 3, 2023Parmar KushDirectorGrant(A)10K$0
Jan 3, 2023Liu HuiDirectorGrant(A)10K$0
Nov 15, 2022Viking Global Opportunities Parent GP LLC10% OwnerBuy(P)3.3M$6.00$20.0M
Aug 1, 2022Chung WendyDirectorGrant(A)27K$0
Jun 3, 20225AM Partners V, LLC10% OwnerSell(S)50K$12.50$629K
Jun 3, 20225AM Partners V, LLC10% OwnerSell(S)100K$12.50$1.2M
Jun 3, 2022Parmar KushDirector, 10% OwnerSell(S)100K$12.50$1.2M
Jun 3, 2022Parmar KushDirector, 10% OwnerSell(S)50K$12.50$629K
May 24, 2022Parmar KushDirectorGrant(A)13K$0
May 24, 2022Nash Christine ADirectorGrant(A)2K$0
May 24, 2022Hopfner Robert LorneDirectorGrant(A)13K$0
May 24, 2022Boudreau Helen MDirectorGrant(A)13K$0
May 24, 2022Hunt RonaldDirectorGrant(A)13K$0
May 24, 2022Soteropoulos PaulaDirectorGrant(A)13K$0
May 24, 2022Liu HuiDirectorGrant(A)2K$0
May 23, 20225AM Partners V, LLC10% OwnerSell(S)34K$13.00$436K
May 23, 20225AM Partners V, LLC10% OwnerSell(S)66K$13.00$864K
May 23, 2022Parmar KushDirector, 10% OwnerSell(S)66K$13.00$864K
May 23, 2022Parmar KushDirector, 10% OwnerSell(S)34K$13.00$436K
Apr 4, 2022Liu HuiDirectorGrant(A)27K$0
Apr 4, 2022Nash Christine ADirectorGrant(A)27K$0
Mar 21, 2022Fryer Jeffrey MSee RemarksBuy(P)3K$8.04$24K
Feb 8, 2022Parmar KushDirectorSell(S)140K$13.05$1.8M
Feb 8, 2022Parmar KushDirectorSell(S)70K$13.05$920K
Feb 8, 20225AM Ventures V, L.P.10% OwnerSell(S)140K$13.05$1.8M
Feb 8, 20225AM Ventures V, L.P.10% OwnerSell(S)70K$13.05$920K
Feb 7, 2022Ryder StevenChief Medical OfficerGrant(A)62K$0
Feb 7, 2022Mackay MartinChief Executive Officer, DirectorGrant(A)62K$0
Feb 7, 2022Uden StephenSee RemarksGrant(A)62K$0
Feb 7, 2022Fryer Jeffrey MChief Financial OfficerGrant(A)62K$0
Jan 19, 2022Fryer Jeffrey MSee RemarksBuy(P)1K$8.70$12K
Jan 13, 2022Uden StephenSee RemarksBuy(P)807$9.62$8K
Jan 13, 2022Uden StephenSee RemarksBuy(P)4K$9.06$38K
Jan 12, 2022Uden StephenSee RemarksBuy(P)5K$10.55$53K

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 2019-12-302026-08-06. Earlier history is backfilling; this window widens as it deepens.

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

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