ACELYRIN
SLRN
SLRN was delisted on the 21st of May, 2025.
110 hedge funds and large institutions have $639M invested in ACELYRIN in 2023 Q4 according to their latest regulatory filings, with 35 funds opening new positions, 31 increasing their positions, 28 reducing their positions, and 24 closing their positions.
866% more call options, than puts
Call options by funds: $4.96M | Put options by funds: $513K
46% more first-time investments, than exits
New positions opened: 35 | Existing positions closed: 24
11% more repeat investments, than reductions
Existing positions increased: 31 | Existing positions reduced: 28
9% more funds holding
Funds holding: 101 → 110 (+9)
1.84% more ownership
Funds ownership: 86.18% → 88.02% (+1.8%)
14% less funds holding in top 10
Funds holding in top 10: 7 → 6 (-1)
25% less capital invested
Capital invested by funds: $847M → $639M (-$208M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
+$25.3M |
| 2 |
BOCH
Blue Owl Capital Holdings
New York
|
+$19.6M |
| 3 |
Morgan Stanley
New York
|
+$12.9M |
| 4 |
LGM
Logos Global Management
San Francisco,
California
|
+$10.7M |
| 5 |
BlackRock
New York
|
+$6.05M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
EC
EcoR1 Capital
San Francisco,
California
|
-$14.3M |
| 2 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
-$13.4M |
| 3 |
O
OrbiMed
New York
|
-$11.3M |
| 4 |
State Street
Boston,
Massachusetts
|
-$11.2M |
| 5 |
IC
Ikarian Capital
Dallas,
Texas
|
-$7.92M |
SLRN Hedge Fund Activity: Q4 2023 in Review
110 of the 6,859 institutional investors tracked by Wall St. Rank reported a position in ACELYRIN (SLRN) for Q4 2023, worth a combined $639M — down 25% from $847M a quarter earlier.
Buyers outnumbered sellers: 35 funds opened new SLRN positions and 24 closed out — a net gain of 11 holders — while 31 added to existing stakes and 28 trimmed.
The largest buyer was Vanguard Group, adding an estimated $25.3M. The largest seller was EcoR1 Capital, exiting entirely with an estimated $14.3M sold.
- 110 institutional investors held ACELYRIN (SLRN) as of Q4 2023, up from 101 in Q3 2023.
- Funds reported $639M of ACELYRIN stock for Q4 2023, down 25% quarter-over-quarter.
- 35 funds opened new ACELYRIN positions in Q4 2023 and 24 closed out, a net change of +11 holders.
- The largest ACELYRIN buyer in Q4 2023 was Vanguard Group, an estimated $25.3M added.
- The largest ACELYRIN seller in Q4 2023 was EcoR1 Capital, an estimated $14.3M sold.
Based on aggregated 13F filings for Q4 2023.