Rallybio Corp - RLYB
Detailed investor-level table based on 13F positions.
Early Q1 2026 data: only 2 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AJU IB Investment Co., Ltd. | History | No change | 754,678 | 4,142 | 18.18% | 0.33% | 1 | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |
| VIKING GLOBAL INVESTORS LP | History | No change | 4,194,777 | 2,878 | 0.01% | 0.01% | 2 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| JOHNSON & JOHNSON | History | No change | 3,636,363 | 2,494 | 0.45% | 0.36% | 3 | 0 | 0.0% | Q4 2025 | Mar 18, 2026 |
| 5AM Venture Management, LLC | History | No change | 3,630,724 | 2,491 | 0.78% | 0.66% | 4 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| TPG GP A, LLC | History | No change | 3,028,414 | 2,089 | 0.08% | 0.08% | 5 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Pivotal bioVenture Partners Investment Advisor LLC | History | No change | 2,404,644 | 1,649 | 0.64% | 0.69% | 6 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| FMR LLC | History | No change | 1,694,388 | 1,162 | 0.0% | 0.0% | 7 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Almitas Capital LLC | History | Reduced | 1,529,653 | 1,049 | 0.23% | 0.18% | 8 | -9,074 | -0.59% | Q4 2025 | Feb 17, 2026 |
| VANGUARD GROUP INC | History | Added to | 1,016,249 | 697 | 0.0% | 0.0% | 9 | +16,622 | 1.66% | Q4 2025 | Jan 29, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 835,692 | 573 | 0.0% | 0.0% | 10 | +120,892 | 16.91% | Q4 2025 | Feb 12, 2026 |
| Canaan Partners XI LLC | History | No change | 450,000 | 308 | 0.23% | 0.22% | 11 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Mariner, LLC | History | No change | 404,546 | 277 | 0.0% | 0.0% | 12 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| CITADEL ADVISORS LLC | History | Reduced | 253,842 | 174 | 0.0% | 0.0% | 13 | -184,863 | -42.14% | Q4 2025 | Feb 17, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 248,005 | 170 | 0.0% | 0.0% | 14 | +2,996 | 1.22% | Q4 2025 | Feb 09, 2026 |
| BlackRock, Inc. | History | No change | 141,663 | 97 | 0.0% | 0.0% | 15 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Reduced | 100,724 | 69 | 0.0% | 0.0% | 16 | -35,570 | -26.1% | Q4 2025 | Feb 17, 2026 |
| XTX Topco Ltd | History | Added to | 97,313 | 66 | 0.0% | 0.0% | 17 | +38,205 | 64.64% | Q4 2025 | Feb 17, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Reduced | 83,480 | 56 | 0.0% | 0.0% | 18 | -6,767 | -7.5% | Q4 2025 | Feb 10, 2026 |
| STATE STREET CORP | History | No change | 62,072 | 42 | 0.0% | 0.0% | 19 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Rangeley Capital, LLC | History | Reduced | 40,000 | 27 | 0.02% | 0.04% | 20 | -43,007 | -51.81% | Q4 2025 | Feb 17, 2026 |
| NORTHERN TRUST CORP | History | No change | 38,124 | 26 | 0.0% | 0.0% | 21 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Added to | 37,000 | 25 | 0.0% | 0.0% | 22 | +15,547 | 72.47% | Q4 2025 | Feb 17, 2026 |
| Virtu Financial LLC | History | Reduced | 27,132 | 19 | 0.0% | 0.0% | 24 | -12,171 | -30.97% | Q4 2025 | Feb 23, 2026 |
| PRUDENTIAL FINANCIAL INC | History | Reduced | 29,100 | 19 | 0.0% | 0.0% | 23 | -9,300 | -24.22% | Q4 2025 | Feb 13, 2026 |
| HRT FINANCIAL LP | History | Reduced | 21,387 | 14 | 0.0% | 0.0% | 25 | -10,837 | -33.63% | Q4 2025 | Feb 12, 2026 |
| GSA CAPITAL PARTNERS LLP | History | New | 19,303 | 13 | 0.0% | — | 26 | +19,303 | New | Q4 2025 | Feb 06, 2026 |
| TWO SIGMA ADVISERS, LP | History | New | 19,300 | 13 | 0.0% | — | 27 | +19,300 | New | Q4 2025 | Feb 17, 2026 |
| OneDigital Investment Advisors LLC | History | No change | 20,000 | 13 | 0.0% | 0.0% | 28 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Ground Swell Capital, LLC | History | New | 15,399 | 10 | 0.02% | — | 29 | +15,399 | New | Q4 2025 | Feb 04, 2026 |
| GREAT VALLEY ADVISOR GROUP, INC. | History | No change | 15,000 | 10 | 0.0% | 0.0% | 30 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| ACT Advisors, LLC. | History | New | 13,153 | 9 | 0.0% | — | 32 | +13,153 | New | Q4 2025 | Jan 14, 2026 |
| Utah Retirement Systems | History | No change | 13,240 | 9 | 0.0% | 0.0% | 31 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| MERCER GLOBAL ADVISORS INC /ADV | History | No change | 10,000 | 6 | 0.0% | 0.0% | 33 | 0 | 0.0% | Q4 2025 | Feb 18, 2026 |
| CAPTRUST FINANCIAL ADVISORS | History | No change | 10,000 | 6 | 0.0% | 0.0% | 34 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Hartford Financial Management Inc. | History | No change | 6,500 | 4 | 0.0% | 0.0% | 35 | 0 | 0.0% | Q4 2025 | Jan 21, 2026 |
| Tower Research Capital LLC (TRC) | History | Reduced | 4,524 | 3 | 0.0% | 0.0% | 38 | -5,657 | -55.56% | Q4 2025 | Feb 17, 2026 |
| UBS Group AG | History | Added to | 4,577 | 3 | 0.0% | 0.0% | 39 | +2,206 | 93.04% | Q4 2025 | Jan 29, 2026 |
| BARCLAYS PLC | History | No change | 5,719 | 3 | 0.0% | 0.0% | 36 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| MORGAN STANLEY | History | No change | 4,640 | 3 | 0.0% | 0.0% | 37 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| CITIGROUP INC | History | Reduced | 3,932 | 2 | 0.0% | 0.0% | 40 | -5,963 | -60.26% | Q4 2025 | Feb 13, 2026 |
| SBI Securities Co., Ltd. | History | No change | 4,248 | 2 | 0.0% | 0.0% | 41 | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 82 | 0 | — | — | — | -800 | -90.7% | Q4 2025 | Feb 11, 2026 |
| Rockefeller Capital Management L.P. | History | Closed out | 0 | 0 | — | — | — | -550 | -100.0% | Q3 2025 | Nov 14, 2025 |
| JONES FINANCIAL COMPANIES LLLP | History | Closed out | 0 | 0 | — | — | — | -90 | -100.0% | Q3 2025 | Nov 04, 2025 |
| Allworth Financial LP | History | New | 50 | 0 | — | — | — | +50 | New | Q4 2025 | Feb 05, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 251 | 0 | — | — | — | +35 | 16.2% | Q4 2025 | Feb 17, 2026 |
| WELLS FARGO & COMPANY/MN | History | No change | 300 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | No change | 980 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |