Rallybio Corp - RLYB
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| FMR LLC | History | Reduced | 793,451 | 7,117 | 0.0% | 0.0% | 1 | -900,937 | -53.17% | Q1 2026 | May 15, 2026 |
| VIKING GLOBAL INVESTORS LP | History | Reduced | 524,347 | 4,703 | 0.01% | 0.01% | 2 | -3,670,430 | -87.5% | Q1 2026 | May 15, 2026 |
| Cormorant Asset Management, LP | History | New | 400,000 | 3,588 | 0.18% | — | 3 | +400,000 | New | Q1 2026 | May 15, 2026 |
| TPG GP A, LLC | History | Reduced | 378,551 | 3,395 | 0.09% | 0.08% | 4 | -2,649,863 | -87.5% | Q1 2026 | May 15, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | History | New | 376,573 | 3,377 | 0.0% | — | 5 | +376,573 | New | Q1 2026 | May 15, 2026 |
| Laurion Capital Management LP | History | New | 302,756 | 2,715 | 0.12% | — | 6 | +302,756 | New | Q1 2026 | May 14, 2026 |
| Pivotal bioVenture Partners Investment Advisor LLC | History | Reduced | 300,579 | 2,696 | 0.96% | 0.64% | 7 | -2,104,065 | -87.5% | Q1 2026 | May 14, 2026 |
| Nantahala Capital Management, LLC | History | New | 300,635 | 2,696 | 0.1% | — | 8 | +300,635 | New | Q1 2026 | May 15, 2026 |
| 5AM Venture Management, LLC | History | Reduced | 291,788 | 2,617 | 0.73% | 0.78% | 9 | -3,338,936 | -91.96% | Q1 2026 | May 15, 2026 |
| Almitas Capital LLC | History | Reduced | 191,206 | 1,715 | 0.39% | 0.23% | 10 | -1,338,447 | -87.5% | Q1 2026 | May 15, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Reduced | 156,527 | 1,404 | 0.0% | 0.0% | 11 | -679,165 | -81.27% | Q1 2026 | May 14, 2026 |
| JOHNSON & JOHNSON | History | Reduced | 152,901 | 1,371 | 0.21% | 0.45% | 12 | -3,483,462 | -95.8% | Q1 2026 | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 112,040 | 1,004 | 0.0% | — | 13 | +112,040 | New | Q1 2026 | May 15, 2026 |
| AJU IB Investment Co., Ltd. | History | Reduced | 94,334 | 846 | 2.77% | 18.18% | 14 | -660,344 | -87.5% | Q1 2026 | May 08, 2026 |
| VANGUARD GROUP INC | History | No change | 1,016,249 | 697 | 0.0% | 0.0% | 15 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| Mariner, LLC | History | Reduced | 50,566 | 453 | 0.0% | 0.0% | 16 | -353,980 | -87.5% | Q1 2026 | May 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Reduced | 35,425 | 317 | 0.0% | 0.0% | 17 | -212,580 | -85.72% | Q1 2026 | May 15, 2026 |
| DELTEC ASSET MANAGEMENT LLC | History | New | 33,750 | 302 | 0.06% | — | 18 | +33,750 | New | Q1 2026 | Apr 24, 2026 |
| Rangeley Capital, LLC | History | Reduced | 30,130 | 270 | 0.26% | 0.02% | 19 | -9,870 | -24.68% | Q1 2026 | May 15, 2026 |
| GTS SECURITIES LLC | History | New | 22,016 | 197 | 0.01% | — | 20 | +22,016 | New | Q1 2026 | May 14, 2026 |
| ADAR1 Capital Management, LLC | History | New | 20,535 | 184 | 0.01% | — | 21 | +20,535 | New | Q1 2026 | May 15, 2026 |
| CITADEL ADVISORS LLC | History | Reduced | 19,886 | 178 | 0.0% | 0.0% | 22 | -233,956 | -92.17% | Q1 2026 | May 15, 2026 |
| BlackRock, Inc. | History | Reduced | 17,486 | 156 | 0.0% | 0.0% | 23 | -124,177 | -87.66% | Q1 2026 | May 13, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 13,547 | 121 | 0.0% | — | 24 | +13,547 | New | Q1 2026 | May 08, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | New | 11,280 | 101 | 0.0% | — | 25 | +11,280 | New | Q1 2026 | May 07, 2026 |
| XTX Topco Ltd | History | Reduced | 11,226 | 100 | 0.0% | 0.0% | 26 | -86,087 | -88.46% | Q1 2026 | May 15, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Reduced | 10,433 | 92 | 0.0% | 0.0% | 27 | -73,047 | -87.5% | Q1 2026 | May 13, 2026 |
| UBS Group AG | History | Added to | 7,914 | 70 | 0.0% | 0.0% | 28 | +3,337 | 72.91% | Q1 2026 | May 05, 2026 |
| JPMORGAN CHASE & CO | History | Added to | 2,497 | 20 | 0.0% | — | 29 | +2,415 | 2945.12% | Q1 2026 | May 13, 2026 |
| TWO SIGMA ADVISERS, LP | History | No change | 19,300 | 13 | 0.0% | 0.0% | 30 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Vanguard Global Advisers, LLC | History | New | 1,442 | 12 | 0.0% | — | 31 | +1,442 | New | Q1 2026 | May 08, 2026 |
| Tower Research Capital LLC (TRC) | History | Reduced | 907 | 8 | 0.0% | 0.0% | 32 | -3,617 | -79.95% | Q1 2026 | May 15, 2026 |
| Hartford Financial Management Inc. | History | Reduced | 812 | 7 | 0.0% | 0.0% | 33 | -5,688 | -87.51% | Q1 2026 | Apr 15, 2026 |
| SBI Securities Co., Ltd. | History | Reduced | 524 | 4 | 0.0% | 0.0% | 34 | -3,724 | -87.66% | Q1 2026 | Apr 27, 2026 |
| MORGAN STANLEY | History | Reduced | 126 | 1 | 0.0% | 0.0% | 35 | -4,514 | -97.28% | Q1 2026 | May 15, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Reduced | 120 | 1 | 0.0% | — | 36 | -860 | -87.76% | Q1 2026 | May 12, 2026 |
| Canaan Partners XI LLC | History | Closed out | 0 | 0 | — | 0.23% | — | -450,000 | -100.0% | Q1 2026 | Apr 24, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Closed out | 0 | 0 | — | 0.0% | — | -100,724 | -100.0% | Q1 2026 | May 15, 2026 |
| STATE STREET CORP | History | Closed out | 0 | 0 | — | 0.0% | — | -62,072 | -100.0% | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | Closed out | 0 | 0 | — | 0.0% | — | -38,124 | -100.0% | Q1 2026 | May 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Closed out | 0 | 0 | — | 0.0% | — | -37,000 | -100.0% | Q1 2026 | May 15, 2026 |
| PRUDENTIAL FINANCIAL INC | History | Closed out | 0 | 0 | — | 0.0% | — | -29,100 | -100.0% | Q1 2026 | May 13, 2026 |
| Virtu Financial LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -27,132 | -100.0% | Q1 2026 | May 14, 2026 |
| HRT FINANCIAL LP | History | Closed out | 0 | 0 | — | 0.0% | — | -21,387 | -100.0% | Q1 2026 | May 14, 2026 |
| OneDigital Investment Advisors LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -20,000 | -100.0% | Q1 2026 | May 08, 2026 |
| GSA CAPITAL PARTNERS LLP | History | Closed out | 0 | 0 | — | 0.0% | — | -19,303 | -100.0% | Q1 2026 | May 08, 2026 |
| Ground Swell Capital, LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -15,399 | -100.0% | Q1 2026 | Apr 21, 2026 |
| GREAT VALLEY ADVISOR GROUP, INC. | History | Closed out | 0 | 0 | — | 0.0% | — | -15,000 | -100.0% | Q1 2026 | May 11, 2026 |
| Utah Retirement Systems | History | Closed out | 0 | 0 | — | 0.0% | — | -13,240 | -100.0% | Q1 2026 | May 15, 2026 |
| ACT Advisors, LLC. | History | Closed out | 0 | 0 | — | 0.0% | — | -13,153 | -100.0% | Q1 2026 | Apr 14, 2026 |
| MERCER GLOBAL ADVISORS INC /ADV | History | Closed out | 0 | 0 | — | 0.0% | — | -10,000 | -100.0% | Q1 2026 | May 15, 2026 |
| CAPTRUST FINANCIAL ADVISORS | History | Closed out | 0 | 0 | — | 0.0% | — | -10,000 | -100.0% | Q1 2026 | May 14, 2026 |
| BARCLAYS PLC | History | Closed out | 0 | 0 | — | 0.0% | — | -5,719 | -100.0% | Q1 2026 | May 14, 2026 |
| CITIGROUP INC | History | Closed out | 0 | 0 | — | 0.0% | — | -3,932 | -100.0% | Q1 2026 | May 11, 2026 |
| WELLS FARGO & COMPANY/MN | History | Reduced | 37 | 0 | — | — | — | -263 | -87.67% | Q1 2026 | May 11, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Closed out | 0 | 0 | — | — | — | -251 | -100.0% | Q1 2026 | May 15, 2026 |
| Fortitude Family Office, LLC | History | New | 53 | 0 | — | — | — | +53 | New | Q1 2026 | Apr 15, 2026 |
| Allworth Financial LP | History | Reduced | 6 | 0 | — | — | — | -44 | -88.0% | Q1 2026 | May 14, 2026 |
| DANSKE BANK A/S | History | New | 1 | 0 | — | — | — | +1 | New | Q1 2026 | May 12, 2026 |