AC Immune
ACIU
40 hedge funds and large institutions have $71.1M invested in AC Immune in 2025 Q3 according to their latest regulatory filings, with 4 funds opening new positions, 14 increasing their positions, 12 reducing their positions, and 6 closing their positions.
237% more call options, than puts
Call options by funds: $293K | Put options by funds: $87K
43% more capital invested
Capital invested by funds: $49.7M → $71.1M (+$21.4M)
17% more repeat investments, than reductions
Existing positions increased: 14 | Existing positions reduced: 12
0.12% more ownership
Funds ownership: 24.4% → 24.52% (+0.12%)
5% less funds holding
Funds holding: 42 → 40 (-2)
33% less first-time investments, than exits
New positions opened: 4 | Existing positions closed: 6
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$1.36M |
| 2 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
+$429K |
| 3 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$49.3K |
| 4 |
Morgan Stanley
New York
|
+$43.2K |
| 5 |
PAG
Private Advisor Group
Morristown,
New Jersey
|
+$37.5K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$284K |
| 2 |
Marshall Wace
London,
United Kingdom
|
-$276K |
| 3 |
Northern Trust
Chicago,
Illinois
|
-$224K |
| 4 |
Handelsbanken Fonder
Stockholm,
Sweden
|
-$213K |
| 5 |
EP
Eversept Partners
New York
|
-$205K |
ACIU Hedge Fund Activity: Q3 2025 in Review
40 of the 7,631 institutional investors tracked by Wall St. Rank reported a position in AC Immune (ACIU) for Q3 2025, worth a combined $71.1M — up 43% from $49.7M a quarter earlier.
Sellers outnumbered buyers: 6 funds closed out of ACIU and 4 opened new positions — a net loss of 2 holders — while 12 trimmed existing stakes and 14 added.
The largest buyer was Millennium Management, adding an estimated $1.36M. The largest seller was Citadel Advisors, cutting an estimated $284K.
- 40 institutional investors held AC Immune (ACIU) as of Q3 2025, down from 42 in Q2 2025.
- Funds reported $71.1M of AC Immune stock for Q3 2025, up 43% quarter-over-quarter.
- 4 funds opened new AC Immune positions in Q3 2025 and 6 closed out, a net change of -2 holders.
- The largest AC Immune buyer in Q3 2025 was Millennium Management, an estimated $1.36M added.
- The largest AC Immune seller in Q3 2025 was Citadel Advisors, an estimated $284K sold.
Based on aggregated 13F filings for Q3 2025.