Rallybio
RLYB
48 hedge funds and large institutions have $10.5M invested in Rallybio in 2025 Q2 according to their latest regulatory filings, with 7 funds opening new positions, 8 increasing their positions, 12 reducing their positions, and 6 closing their positions.
17% more first-time investments, than exits
New positions opened: 7 | Existing positions closed: 6
2% more funds holding
Funds holding: 47 → 48 (+1)
0% more funds holding in top 10
Funds holding in top 10: 4 → 4 (0)
1.95% less ownership
Funds ownership: 76.91% → 74.96% (-2%)
33% less repeat investments, than reductions
Existing positions increased: 8 | Existing positions reduced: 12
50% less capital invested
Capital invested by funds: $20.9M → $10.5M (-$10.4M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AC
Almitas Capital
Santa Monica,
California
|
+$171K |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$34.7K |
| 3 |
Renaissance Technologies
New York
|
+$29.3K |
| 4 |
Fidelity Investments
Boston,
Massachusetts
|
+$28.2K |
| 5 |
VF
Virtu Financial
New York
|
+$18.8K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AI
Allostery Investments
Stamford,
Connecticut
|
-$492K |
| 2 |
CPX
Canaan Partners XI
Menlo Park,
California
|
-$196K |
| 3 |
BCM
Bridgeway Capital Management
Houston,
Texas
|
-$60K |
| 4 |
Aberdeen Group
Edinburgh,
United Kingdom
|
-$43.7K |
| 5 |
Squarepoint
New York
|
-$21.8K |
RLYB Hedge Fund Activity: Q2 2025 in Review
48 of the 7,616 institutional investors tracked by Wall St. Rank reported a position in Rallybio (RLYB) for Q2 2025, worth a combined $10.5M — down 50% from $20.9M a quarter earlier.
Buyers outnumbered sellers: 7 funds opened new RLYB positions and 6 closed out — a net gain of 1 holder — while 8 added to existing stakes and 12 trimmed.
The largest buyer was Almitas Capital, adding an estimated $171K. The largest seller was Allostery Investments, exiting entirely with an estimated $492K sold.
- 48 institutional investors held Rallybio (RLYB) as of Q2 2025, up from 47 in Q1 2025.
- Funds reported $10.5M of Rallybio stock for Q2 2025, down 50% quarter-over-quarter.
- 7 funds opened new Rallybio positions in Q2 2025 and 6 closed out, a net change of +1 holder.
- The largest Rallybio buyer in Q2 2025 was Almitas Capital, an estimated $171K added.
- The largest Rallybio seller in Q2 2025 was Allostery Investments, an estimated $492K sold.
Based on aggregated 13F filings for Q2 2025.