Rallybio
RLYB
37 hedge funds and large institutions have $65M invested in Rallybio in 2026 Q2 according to their latest regulatory filings, with 9 funds opening new positions, 9 increasing their positions, 7 reducing their positions, and 10 closing their positions.
55% more capital invested
Capital invested by funds: $41.9M → $65M (+$23.2M)
29% more repeat investments, than reductions
Existing positions increased: 9 | Existing positions reduced: 7
3% less funds holding
Funds holding: 38 → 37 (-1)
10% less first-time investments, than exits
New positions opened: 9 | Existing positions closed: 10
11.05% less ownership
Funds ownership: 11.05% → 0% (-11%)
100% less funds holding in top 10
Funds holding in top 10: 1 → 0 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
ACM
ADAR1 Capital Management
Austin,
Texas
|
+$11.7M |
| 2 |
RC
Rangeley Capital
New Canaan,
Connecticut
|
+$961K |
| 3 |
Vanguard Capital Management
Malvern,
Pennsylvania
|
+$778K |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$673K |
| 5 |
Jane Street
New York
|
+$610K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CAM
Cormorant Asset Management
Boston,
Massachusetts
|
-$3.59M |
| 2 |
Balyasny Asset Management
Chicago,
Illinois
|
-$3.38M |
| 3 |
LCM
Laurion Capital Management
New York
|
-$2.72M |
| 4 |
5VM
5AM Venture Management
San Francisco,
California
|
-$2.62M |
| 5 |
NCM
Nantahala Capital Management
New Canaan,
Connecticut
|
-$1.44M |
RLYB Hedge Fund Activity: Q2 2026 in Review
37 of the 8,318 institutional investors tracked by Wall St. Rank reported a position in Rallybio (RLYB) for Q2 2026, worth a combined $65M — up 55% from $41.9M a quarter earlier.
Sellers outnumbered buyers: 10 funds closed out of RLYB and 9 opened new positions — a net loss of 1 holder — while 7 trimmed existing stakes and 9 added.
The largest buyer was ADAR1 Capital Management, adding an estimated $11.7M. The largest seller was Cormorant Asset Management, exiting entirely with an estimated $3.59M sold.
- 37 institutional investors held Rallybio (RLYB) as of Q2 2026, down from 38 in Q1 2026.
- Funds reported $65M of Rallybio stock for Q2 2026, up 55% quarter-over-quarter.
- 9 funds opened new Rallybio positions in Q2 2026 and 10 closed out, a net change of -1 holder.
- The largest Rallybio buyer in Q2 2026 was ADAR1 Capital Management, an estimated $11.7M added.
- The largest Rallybio seller in Q2 2026 was Cormorant Asset Management, an estimated $3.59M sold.
Based on aggregated 13F filings for Q2 2026.