ACELYRIN
SLRN
SLRN was delisted on the 21st of May, 2025.
101 hedge funds and large institutions have $847M invested in ACELYRIN in 2023 Q3 according to their latest regulatory filings, with 47 funds opening new positions, 20 increasing their positions, 23 reducing their positions, and 28 closing their positions.
68% more first-time investments, than exits
New positions opened: 47 | Existing positions closed: 28
23% more funds holding
Funds holding: 82 → 101 (+19)
6.79% more ownership
Funds ownership: 79.39% → 86.18% (+6.8%)
13% less funds holding in top 10
Funds holding in top 10: 8 → 7 (-1)
13% less repeat investments, than reductions
Existing positions increased: 20 | Existing positions reduced: 23
44% less call options, than puts
Call options by funds: $3.2M | Put options by funds: $5.7M
47% less capital invested
Capital invested by funds: $1.6B → $847M (-$756M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
State Street
Boston,
Massachusetts
|
+$39.6M |
| 2 |
Janus Henderson Group
London,
United Kingdom
|
+$38.1M |
| 3 |
Fidelity Investments
Boston,
Massachusetts
|
+$32M |
| 4 |
Goldman Sachs
New York
|
+$31.2M |
| 5 |
EC
EcoR1 Capital
San Francisco,
California
|
+$29.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AllianceBernstein
Nashville,
Tennessee
|
-$23.8M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$21.9M |
| 3 |
FAM
Fred Alger Management
New York
|
-$20.3M |
| 4 |
APM
Avidity Partners Management
Dallas,
Texas
|
-$15.7M |
| 5 |
Millennium Management
New York
|
-$15.5M |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
ZP
126
Zimmer Partners
New York
| – | -$251K | -12,000 | Closed |
|
127
Jane Street
New York
| – | -$206K | -9,695 | Closed |
|
128
Simplex Trading
Chicago,
Illinois
| – | -$74.6K | -3,511 | Closed |
|
129
PNC Financial Services Group
Pittsburgh,
Pennsylvania
| – | -$4.49K | -215 | Closed |
|
|
FDCC
130
Foster Dykema Cabot & Co
Waltham,
Massachusetts
| – | -$1K | -51 | Closed |
|
SLRN Hedge Fund Activity: Q3 2023 in Review
101 of the 6,301 institutional investors tracked by Wall St. Rank reported a position in ACELYRIN (SLRN) for Q3 2023, worth a combined $847M — down 47% from $1.6B a quarter earlier.
Buyers outnumbered sellers: 47 funds opened new SLRN positions and 28 closed out — a net gain of 19 holders — while 20 added to existing stakes and 23 trimmed.
The largest buyer was State Street, adding an estimated $39.6M. The largest seller was AllianceBernstein, cutting an estimated $23.8M.
- 101 institutional investors held ACELYRIN (SLRN) as of Q3 2023, up from 82 in Q2 2023.
- Funds reported $847M of ACELYRIN stock for Q3 2023, down 47% quarter-over-quarter.
- 47 funds opened new ACELYRIN positions in Q3 2023 and 28 closed out, a net change of +19 holders.
- The largest ACELYRIN buyer in Q3 2023 was State Street, an estimated $39.6M added.
- The largest ACELYRIN seller in Q3 2023 was AllianceBernstein, an estimated $23.8M sold.
Based on aggregated 13F filings for Q3 2023.