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.
Q4 2025 vs. Q3 2025
How the institutions holding Rallybio Corp changed between Q3 2025 and Q4 2025.
All holders in Q4 2025All holders in Q3 2025
| Measure | Q3 2025 | Of which not filed for Q4 2025 | Q4 2025 | Change |
|---|---|---|---|---|
| Holders | 45 | 1 | 46 | +2 |
| Shares | 28.3M | 3.30M | 24.9M | −61.0K (−0.2%) |
| Value | $14.1M | $1.65M | $16.6M | +$4.12M (+33.1%) |
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (4)
Institutions that held Rallybio Corp at the end of Q4 2025 but not at the end of Q3 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Two Sigma Advisers, LP | 19,300 | $13.2K | 0.00% |
| Gsa Capital Partners LLP | 19,303 | $13.0K | 0.00% |
| Ground Swell Capital, LLC | 15,399 | $10.6K | 0.02% |
| ACT Advisors, LLC. | 13,153 | $9.02K | 0.00% |
Sold out (2)
Institutions that held Rallybio Corp at the end of Q3 2025 and filed for Q4 2025 without it.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| Rockefeller Capital Management L.P. | 550 | $274 |
| Jones Financial Companies LLLP | 90 | $50 |
Not filed for Q4 2025 yet (1)
Institutions that held Rallybio Corp at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| New Leaf Venture Partners, L.L.C. | 3,301,603 | $1.65M |