RallybioRLYB
13F holders, Q2 2025 (June 30)At the end of Q2 2025, 48 institutions reported holding Rallybio Corp. (RLYB) in their 13F filings, up 1 from Q1 2025. 7 opened new positions and 6 sold out. The largest holders were Viking Global Investors ($1.4M), 5AM Venture Management, LLC ($1.2M) and Johnson & Johnson ($1.2M). 4 famous investors held it, including Andreas Halvorsen (0.0% of Viking Global Investors's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Rallybio Corp.
- CUSIP
- 75120L100
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 7 | $61K |
| Exits | 6 | $590K |
All 13F filers, Q1 2025 → Q2 2025: 991,876 shares bought and 1,800,400 shares sold, net −808,524 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 48 holders
| Viking Global Investors | 0.00% | No change | 4,194,777 | $1.4M |
| 5AM Venture Management, LLC | 0.47% | No change | 3,630,724 | $1.2M |
| Johnson & Johnson | 0.36% | No change | 3,636,363 | $1.2M |
| New Leaf Venture Partners, L.L.C. | 2.11% | No change | 3,301,603 | $1.1M |
| TPG GP A, LLC | 0.05% | No change | 3,028,414 | $1.0M |
| Pivotal bioVenture Partners Investment Advisor LLC | 0.50% | No change | 2,404,644 | $813K |
| FMR LLC | 0.00% | Add +4.8% | 1,870,276 | $632K |
| Almitas Capital LLC | 0.16% | Add +39.7% | 1,817,492 | $614K |
| Aberdeen Group plc | 0.00% | Reduce -7.6% | 1,595,262 | $539K |
| Canaan Partners XI LLC | 0.19% | Reduce -38.6% | 940,984 | $318K |
| Vanguard Group Inc. | 0.00% | Reduce -6.4% | 909,941 | $308K |
| AJU IB Investment Co., Ltd. | 0.28% | No change | 754,678 | $255K |
| Laurion Capital Management LP | 0.03% | No change | 735,543 | $249K |
| Renaissance Technologies | 0.00% | Add +22.3% | 485,032 | $164K |
| Mariner, LLC | 0.00% | No change | 404,546 | $137K |
| Geode Capital Management, LLC | 0.00% | Reduce -1.0% | 245,009 | $83K |
| Millennium Management | 0.00% | Reduce -20.9% | 179,839 | $61K |
| BlackRock, Inc. | 0.00% | Reduce -26.1% | 154,648 | $52K |
| UBS Group AG | 0.00% | Add +680.9% | 120,242 | $41K |
| Two Sigma Advisers, LP | 0.00% | Reduce -2.3% | 88,900 | $30K |
| Acadian Asset Management LLC | 0.00% | No change | 90,247 | $29K |
| Citadel Advisors | 0.00% | Add +22.9% | 64,884 | $22K |
| Two Sigma Investments, LP | 0.00% | Reduce -4.4% | 63,786 | $22K |
| State Street Corp. | 0.00% | No change | 62,072 | $21K |
| Virtu Financial LLC | 0.00% | New | 56,762 | $19K |
| XTX Topco Ltd | 0.00% | New | 55,479 | $19K |
| Wells Fargo & Company | 0.00% | Reduce -5.1% | 40,032 | $14K |
| Northern Trust Corp. | 0.00% | No change | 38,124 | $13K |
| Morgan Stanley | 0.00% | No change | 36,484 | $12K |
| HRT Financial LP | 0.00% | New | 29,607 | $10K |
| Susquehanna International Group, LLP | 0.00% | New | 23,263 | $8K |
| Barclays PLC | 0.00% | No change | 15,390 | $5K |
| Two Sigma Securities, LLC | 0.00% | New | 15,153 | $5K |
| Great Valley Advisor Group, Inc. | 0.00% | No change | 15,000 | $5K |
| Utah Retirement Systems | 0.00% | No change | 13,240 | $4K |
| Jane Street Group, LLC | 0.00% | Add +10.5% | 11,742 | $4K |
| HSBC Holdings PLC | 0.00% | Reduce -12.7% | 10,520 | $4K |
| Mercer Global Advisors Inc. | 0.00% | No change | 10,000 | $3K |
| Captrust Financial Advisors | 0.00% | No change | 10,000 | $3K |
| Bank of America Corp. | 0.00% | Add +0.3% | 8,773 | $3K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +41.4% | 7,341 | $2K |
| Hartford Financial Management Inc. | 0.00% | No change | 6,500 | $2K |
| SBI Securities Co., Ltd. | 0.00% | Reduce -0.9% | 4,448 | $2K |
| Federated Hermes, Inc. | 0.00% | No change | 2,209 | $747 |
| BNP Paribas Financial Markets | 0.00% | No change | 983 | $332 |
| JPMorgan Chase & Co. | 0.00% | Reduce -6.6% | 882 | $298 |
| Raymond James Financial Inc. | 0.00% | New | 850 | $288 |
| Allworth Financial LP | 0.00% | New | 50 | $17 |
"% of holder's portfolio" is RLYB's weight in each manager's 13F, not the share of Rallybio Corp. the manager owns.