Rallybio Corp (RLYB)

Latest Insider Confidence Score

2026Q1

51.5
Bullish

Company insider confidence (by quarter)

2021Q3 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Viking Global Investors Lp 10% Owner 3,333,388 Nov 17, 2022
Viking Global Opportunities Parent GP LLC — 3,333,388 Nov 17, 2022
Viking Global Opportunities GP LLC 10% Owner 3,333,388 Nov 17, 2022
Viking Global Opportunities Portfolio GP LLC 10% Owner 3,333,388 Nov 17, 2022
Viking Global Opportunities Illiquid Investments Sub-Master LP 10% Owner 3,333,388 Nov 17, 2022

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Feb 18, 2026 Feb 23, 2026 Lieber Jonathan I CFO Sell 90.0 +1,711 71.17% ✗ $4K
Feb 18, 2026 Feb 20, 2026 MACKAY MARTIN Director Neutral 52.5 - 0.00% ✗ -
Feb 18, 2026 Feb 20, 2026 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 Boudreau Helen M Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 Chung Wendy Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 Nash Christine A Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 Hopfner Robert Lorne Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 Soteropoulos Paula Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
May 13, 2025 May 15, 2025 MACKAY MARTIN Director Neutral 52.5 - 0.00% ✗ -
Feb 14, 2025 Feb 19, 2025 Uden Stephen CEO Neutral 52.5 - 0.00% ✗ -
Feb 14, 2025 Feb 19, 2025 Ryder Steven Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Feb 14, 2025 Feb 19, 2025 Lieber Jonathan I CFO Neutral 52.5 - 0.00% ✗ -
Jan 2, 2025 Jan 6, 2025 MACKAY MARTIN Director Neutral 52.5 - 0.00% ✗ -
Jan 2, 2025 Jan 6, 2025 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
Jan 2, 2025 Jan 6, 2025 Hopfner Robert Lorne Director Neutral 52.5 - 0.00% ✗ -
Jan 2, 2025 Jan 6, 2025 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 Boudreau Helen M Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 PARMAR KUSH Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 Soteropoulos Paula Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 Nash Christine A Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 Hopfner Robert Lorne Director Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 17, 2024 Chung Wendy Director Neutral 52.5 - 0.00% ✗ -
Feb 15, 2024 Feb 16, 2024 Uden Stephen CEO Neutral 52.5 - 0.00% ✗ -
Feb 15, 2024 Feb 16, 2024 MACKAY MARTIN Chair Neutral 52.5 - 0.00% ✗ -
Feb 15, 2024 Feb 16, 2024 Lieber Jonathan I CFO Neutral 52.5 - 0.00% ✗ -
Feb 15, 2024 Feb 16, 2024 Ryder Steven Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Jan 2, 2024 Jan 4, 2024 PARMAR KUSH Director Neutral 52.5 - 0.00% ✗ -
Jan 2, 2024 Jan 4, 2024 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 PARMAR KUSH Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 Nash Christine A Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 Boudreau Helen M Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 Hopfner Robert Lorne Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 Soteropoulos Paula Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
May 17, 2023 May 19, 2023 Chung Wendy Director Neutral 52.5 - 0.00% ✗ -
Mar 14, 2023 Mar 16, 2023 Lieber Jonathan I Officer Buy 91.3 +5,000 100.00% ✗ $26.1K
Mar 7, 2023 Mar 9, 2023 PARMAR KUSH Director Sell 20.0 -100,000 -2.68% ✗ $820K
Mar 7, 2023 Mar 9, 2023 5AM Partners V, LLC 10% Owner Sell 20.0 -100,000 -2.68% ✗ $820K
Feb 6, 2023 Feb 6, 2023 Uden Stephen Officer Neutral 52.5 - 0.00% ✗ -
Feb 6, 2023 Feb 6, 2023 Ryder Steven Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Feb 6, 2023 Feb 6, 2023 MACKAY MARTIN CEO Neutral 52.5 - 0.00% ✗ -
Feb 1, 2023 Feb 1, 2023 Lieber Jonathan I Officer Neutral 52.5 - 0.00% ✗ -
Feb 1, 2023 Lieber Jonathan I Officer Neutral 52.5 - 0.00% ✗ -
Jan 3, 2023 Jan 5, 2023 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2023 Jan 5, 2023 PARMAR KUSH Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2023 Jan 5, 2023 Chung Wendy Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2023 Jan 5, 2023 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
Nov 15, 2022 Nov 17, 2022 VIKING GLOBAL INVESTORS LP 10% Owner Neutral 52.5 - 0.00% ✗ -
Aug 1, 2022 Aug 3, 2022 Chung Wendy Director Neutral 52.5 - 0.00% ✗ -
Aug 3, 2022 Chung Wendy Director Neutral 52.5 - 0.00% ✗ -
Jun 3, 2022 Jun 7, 2022 PARMAR KUSH Director Sell 17.5 -150,000 -3.87% ✗ $1.9M
Jun 3, 2022 Jun 7, 2022 5AM Opportunities I, L.P. 10% Owner Sell 17.5 -150,000 -3.87% ✗ $1.9M
May 24, 2022 May 26, 2022 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
May 24, 2022 May 26, 2022 Soteropoulos Paula Director Neutral 52.5 - 0.00% ✗ -
May 24, 2022 May 26, 2022 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
May 24, 2022 May 26, 2022 Boudreau Helen M Director Neutral 52.5 - 0.00% ✗ -
May 24, 2022 May 26, 2022 Hopfner Robert Lorne Director Neutral 52.5 - 0.00% ✗ -
May 24, 2022 May 26, 2022 Nash Christine A Director Neutral 52.5 - 0.00% ✗ -
May 24, 2022 May 26, 2022 PARMAR KUSH Director Neutral 52.5 - 0.00% ✗ -
May 23, 2022 May 25, 2022 PARMAR KUSH Director Sell 17.5 -100,000 -2.51% ✗ $1.3M
May 23, 2022 May 25, 2022 5AM Opportunities I, L.P. 10% Owner Sell 17.5 -100,000 -2.51% ✗ $1.3M
Apr 4, 2022 Apr 6, 2022 Nash Christine A Director Neutral 52.5 - 0.00% ✗ -
Apr 4, 2022 Apr 6, 2022 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
Apr 6, 2022 Liu Hui Director Neutral 52.5 - 0.00% ✗ -
Apr 6, 2022 Nash Christine A Director Neutral 52.5 - 0.00% ✗ -
Mar 21, 2022 Mar 23, 2022 Fryer Jeffrey M Officer Buy 86.3 +3,000 6.81% ✗ $24.1K
Feb 8, 2022 Feb 10, 2022 5AM Opportunities I, L.P. 10% Owner Sell 17.5 -210,000 -5.01% ✗ $2.7M
Feb 8, 2022 Feb 10, 2022 PARMAR KUSH Director Sell 17.5 -210,000 -5.01% ✗ $2.7M
Feb 7, 2022 Feb 9, 2022 Fryer Jeffrey M CFO Neutral 52.5 - 0.00% ✗ -
Feb 7, 2022 Feb 9, 2022 Uden Stephen Officer Neutral 52.5 - 0.00% ✗ -
Feb 7, 2022 Feb 9, 2022 MACKAY MARTIN CEO Neutral 52.5 - 0.00% ✗ -
Feb 7, 2022 Feb 9, 2022 Ryder Steven Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Jan 19, 2022 Jan 21, 2022 Fryer Jeffrey M Officer Buy 83.8 +1,400 3.28% ✗ $12.2K
Jul 28, 2021 Jan 14, 2022 Uden Stephen Officer Buy 95.0 +719,127 100.00% ✗ $98.5K
Jul 28, 2021 Jan 12, 2022 MACKAY MARTIN CEO Buy 95.0 +719,126 100.00% ✗ $103.5K
Jul 28, 2021 Jan 11, 2022 Fryer Jeffrey M Officer Buy 95.0 +719,125 1089.57% ✗ $94.1K
Jan 3, 2022 Jan 5, 2022 Hopfner Robert Lorne Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2022 Jan 5, 2022 HUNT RONALD Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2022 Jan 5, 2022 PARMAR KUSH Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2022 Jan 5, 2022 SHANNON TIMOTHY M Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2022 Jan 5, 2022 Soteropoulos Paula Director Neutral 52.5 - 0.00% ✗ -
Jul 28, 2021 Aug 4, 2021 PARMAR KUSH Director Buy 100.0 +4,190,724 100.00% ✗ $8M
Aug 2, 2021 Aug 4, 2021 5AM Opportunities I, L.P. 10% Owner Buy 100.0 +615,384 17.21% ✗ $8M
Aug 4, 2021 5AM Ventures V, L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Jul 28, 2021 Aug 4, 2021 Hopfner Robert Lorne Director Buy 100.0 +2,271,311 134.36% ✗ $7.5M
Jul 28, 2021 Aug 4, 2021 HUNT RONALD Director Buy 100.0 +2,301,603 100.00% ✗ $4M
Jul 28, 2021 Aug 4, 2021 SHANNON TIMOTHY M Director Buy 97.5 +2,409,712 100.00% ✗ $1000K
Aug 2, 2021 Aug 4, 2021 FMR LLC Other Neutral 52.5 - 0.00% ✗ -
Jul 29, 2021 Aug 2, 2021 VIKING GLOBAL INVESTORS LP 10% Owner Buy 100.0 +806,000 23.78% ✗ $10.5M
Jul 29, 2021 VIKING GLOBAL INVESTORS LP 10% Owner Neutral 52.5 - 0.00% ✗ -
Jul 29, 2021 5AM Ventures V, L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Jul 29, 2021 Soteropoulos Paula Director Neutral 52.5 - 0.00% ✗ -
Jul 29, 2021 PARMAR KUSH Director Neutral 52.5 - 0.00% ✗ -
Jul 29, 2021 Iancovici Lucian Director Neutral 52.5 - 0.00% ✗ -
Jul 29, 2021 Boudreau Helen M Director Neutral 52.5 - 0.00% ✗ -