ACELYRIN
SLRN
SLRN was delisted on the 21st of May, 2025.
105 hedge funds and large institutions have $183M invested in ACELYRIN in 2025 Q1 according to their latest regulatory filings, with 22 funds opening new positions, 22 increasing their positions, 41 reducing their positions, and 42 closing their positions.
129% more call options, than puts
Call options by funds: $71K | Put options by funds: $31K
100% more funds holding in top 10
Funds holding in top 10: 2 → 4 (+2)
14.28% less ownership
Funds ownership: 87.69% → 73.41% (-14%)
16% less funds holding
Funds holding: 125 → 105 (-20)
34% less capital invested
Capital invested by funds: $276M → $183M (-$93.8M)
46% less repeat investments, than reductions
Existing positions increased: 22 | Existing positions reduced: 41
48% less first-time investments, than exits
New positions opened: 22 | Existing positions closed: 42
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
TCM
Tang Capital Management
San Diego,
California
|
+$23.3M |
| 2 |
MAP
Madison Avenue Partners
New York
|
+$9.85M |
| 3 |
VCIM
Velan Capital Investment Management
Alpharetta,
Georgia
|
+$8.01M |
| 4 |
Balyasny Asset Management
Chicago,
Illinois
|
+$3.1M |
| 5 |
CF
Cantor Fitzgerald
New York
|
+$1.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$19.6M |
| 2 |
Millennium Management
New York
|
-$10.9M |
| 3 |
Citadel Advisors
Miami,
Florida
|
-$9.6M |
| 4 |
BOCH
Blue Owl Capital Holdings
New York
|
-$8.74M |
| 5 |
SL
Siren LLC
Greenwich,
Connecticut
|
-$5.43M |
SLRN Hedge Fund Activity: Q1 2025 in Review
105 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in ACELYRIN (SLRN) for Q1 2025, worth a combined $183M — down 34% from $276M a quarter earlier.
Sellers outnumbered buyers: 42 funds closed out of SLRN and 22 opened new positions — a net loss of 20 holders — while 41 trimmed existing stakes and 22 added.
The largest buyer was Tang Capital Management, opening a new position worth an estimated $23.3M. The largest seller was T. Rowe Price Investment Management, cutting an estimated $19.6M.
- 105 institutional investors held ACELYRIN (SLRN) as of Q1 2025, down from 125 in Q4 2024.
- Funds reported $183M of ACELYRIN stock for Q1 2025, down 34% quarter-over-quarter.
- 22 funds opened new ACELYRIN positions in Q1 2025 and 42 closed out, a net change of -20 holders.
- The largest ACELYRIN buyer in Q1 2025 was Tang Capital Management, an estimated $23.3M added.
- The largest ACELYRIN seller in Q1 2025 was T. Rowe Price Investment Management, an estimated $19.6M sold.
Based on aggregated 13F filings for Q1 2025.