🕵️ Rallybio Corp ($RLYB)
SEC insider & ownership activity, last 12 months · CIK 1739410 · every row links its SEC filing
Insider sell value was withheld pending verification over the last 12 months. No red-flag 8-Ks in the window.
Insider flow
1 buyer, $4.2M (14 lots) · 1 seller, value withheld pending verification (1 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| ADAR1 Capital Management, LLC | 14 | $4.2M | 0 | – | May 19, 2026 |
| Jonathan I. Lieber | 0 | – | 1 | value withheld pending verification | Feb 23, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| ADAR1 Capital Management, LLC | 17.5% | 13G | Jun 5, 2026 | filing ↗ | |
| Daniel Schneeberger | 17.5% | 13G | Jun 5, 2026 | filing ↗ | |
| FMR LLC | 15.0% | 13G | Aug 6, 2026 | filing ↗ | |
| Abigail P. Johnson | 15.0% | 13G | Aug 6, 2026 | filing ↗ | |
| Viking Global Investors LP | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Opportunities Parent GP LLC | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Opportunities GP LLC | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Opportunities Portfolio GP LLC | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Opportunities Illiquid Investments Sub-Master LP | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Halvorsen Ole Andreas | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Shabet Rose Sharon | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| David C. Ott | 10.0% | 13G | Feb 17, 2026 | filing ↗ | |
| TPG GP A, LLC | 7.2% | 13D | Mar 1, 2026 | filing ↗ | |
| James G. Coulter | 7.2% | 13D | Mar 1, 2026 | filing ↗ | |
| Jon Winkelried | 7.2% | 13D | Mar 1, 2026 | filing ↗ | |
| Balyasny Asset Management L.P. | 7.1% | 13G | May 15, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Sep 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 8, 2026 | filing ↗ |
| Material agreement (1.01) | May 31, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | May 31, 2026 | filing ↗ |
| Change of control (5.01) | May 31, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 31, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 31, 2026 | filing ↗ |
| Agreement terminated (1.02) | May 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 3, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 31, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 1, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Mar 1, 2026 | filing ↗ |
| Change of control (5.01) | Mar 1, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 1, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Jan 26, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jan 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 26, 2026 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |