Rallybio Corp
RLYB- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001739410
No open-market purchases or sales by Rallybio Corp insiders were filed in the last 90 days; 37 institutions reported holding it in 13F filings for Q2 2026, worth $65.0M in total; Viking Global Investors is the only superinvestor holding it.
13F holders, Q3 2025
Institutional positions in Rallybio Corp as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 45
- −3 vs. Q2 2025
- Shares held
- 28.3M
- −2.90M (−9.3%) vs. Q2 2025
- Total value
- $14.1M
- +$3.60M (+34.2%) vs. Q2 2025
- New holders
- 6
- 7 more added
- Sold out
- 9
- 13 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting RLYB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 37 | $65.0M |
| Q1 2026 | 38 | $41.9M |
| Q4 2025 | 46 | $16.6M |
| Q3 2025 | 45 | $14.1M |
| Q2 2025 | 48 | $10.5M |
| Q1 2025 | 47 | $20.9M |
| Q4 2024 | 49 | $31.1M |
| Q3 2024 | 49 | $36.5M |
| Q2 2024 | 66 | $42.4M |
| Q1 2024 | 62 | $55.9M |
| Q4 2023 | 54 | $75.9M |
| Q3 2023 | 58 | $105.2M |
| Q2 2023 | 59 | $188.3M |
| Q1 2023 | 53 | $183.3M |
| Q4 2022 | 58 | $212.3M |
| Q3 2022 | 53 | $402.1M |
| Q2 2022 | 47 | $208.8M |
| Q1 2022 | 47 | $193.9M |
| Q4 2021 | 38 | $260.1M |
| Q3 2021 | 34 | $419.9M |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Rallybio Corp; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Allworth Financial LP | 50 | $25 | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 90 | $50 | 0.00% | +90 | New |
| Bank of America Corp | 216 | $107 | 0.00% | −8,557−97.5% | Reduced |
| Wells Fargo & Company | 300 | $150 | 0.00% | −39,732−99.3% | Reduced |
| Rockefeller Capital Management L.P. | 550 | $274 | 0.00% | +550 | New |
| JPMorgan Chase & Co | 882 | $440 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 980 | $489 | 0.00% | −3−0.3% | Reduced |
| UBS Group AG | 2,371 | $1.18K | 0.00% | −117,871−98.0% | Reduced |
| SBI Securities Co., Ltd. | 4,248 | $2.12K | 0.00% | −200−4.5% | Reduced |
| Morgan Stanley | 4,640 | $2.31K | 0.00% | −31,844−87.3% | Reduced |
| Barclays PLC | 5,719 | $2.85K | 0.00% | −9,671−62.8% | Reduced |
| Hartford Financial Management Inc. | 6,500 | $3.24K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 9,895 | $4.94K | 0.00% | +9,895 | New |
| Mercer Global Advisors Inc | 10,000 | $4.99K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 10,000 | $4.99K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 10,181 | $5.08K | 0.00% | +2,840+38.7% | Added |
| Utah Retirement Systems | 13,240 | $6.61K | 0.00% | 00.0% | Unchanged |
| Great Valley Advisor Group, Inc. | 15,000 | $7.49K | 0.00% | 00.0% | Unchanged |
| Resources Investment Advisors, LLC. | 20,000 | $9.98K | 0.00% | +20,000 | New |
| Two Sigma Investments, LP | 21,453 | $10.7K | 0.00% | −42,333−66.4% | Reduced |
| HRT Financial LP | 32,224 | $16.0K | 0.00% | +2,617+8.8% | Added |
| Northern Trust Corp | 38,124 | $19.0K | 0.00% | 00.0% | Unchanged |
| Prudential Financial Inc | 38,400 | $19.2K | 0.00% | +38,400 | New |
| Virtu Financial LLC | 39,303 | $20.0K | 0.00% | −17,459−30.8% | Reduced |
| XTX Topco Ltd | 59,108 | $29.5K | 0.00% | +3,629+6.5% | Added |
| State Street Corp | 62,072 | $31.0K | 0.00% | 00.0% | Unchanged |
| Rangeley Capital, LLC | 83,007 | $41.4K | 0.04% | +83,007 | New |
| Acadian Asset Management LLC | 90,247 | $44.0K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 136,294 | $68.0K | 0.00% | +113,031+485.9% | Added |
| BlackRock, Inc. | 141,663 | $70.7K | 0.00% | −12,985−8.4% | Reduced |
| Geode Capital Management, LLC | 245,009 | $122.3K | 0.00% | 00.0% | Unchanged |
| Mariner, LLC | 404,546 | $201.9K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 438,705 | $218.9K | 0.00% | +373,821+576.1% | Added |
| Canaan Partners XI LLC | 450,000 | $224.6K | 0.22% | −490,984−52.2% | Reduced |
| Renaissance Technologies LLC | 714,800 | $356.7K | 0.00% | +229,768+47.4% | Added |
| AJU IB Investment Co., Ltd. | 754,678 | $377.3K | 0.33% | 00.0% | Unchanged |
| Vanguard Group Inc | 999,627 | $498.8K | 0.00% | +89,686+9.9% | Added |
| Almitas Capital LLC | 1,538,727 | $767.8K | 0.18% | −278,765−15.3% | Reduced |
| FMR LLC | 1,694,388 | $845.5K | 0.00% | −175,888−9.4% | Reduced |
| Pivotal bioVenture Partners Investment Advisor LLC | 2,404,644 | $1.20M | 0.69% | 00.0% | Unchanged |
| TPG GP A, LLC | 3,028,414 | $1.51M | 0.08% | 00.0% | Unchanged |
| New Leaf Venture Partners, L.L.C. | 3,301,603 | $1.65M | 3.83% | 00.0% | Unchanged |
| 5AM Venture Management, LLC | 3,630,724 | $1.81M | 0.66% | 00.0% | Unchanged |
| Johnson & Johnson | 3,636,363 | $1.81M | 0.36% | 00.0% | Unchanged |
| Viking Global Investors LPSuperinvestorViking Global Investors | 4,194,777 | $2.09M | 0.01% | 00.0% | Unchanged |
| Standard Life Aberdeen plc | 0 | $0 | 0.00% | −1,595,262−100.0% | Sold out |
| Laurion Capital Management LP | 0 | $0 | 0.00% | −735,543−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −179,839−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −88,900−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −15,153−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −11,742−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −10,520−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −2,209−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −850−100.0% | Sold out |