AC Immune
ACIU
42 hedge funds and large institutions have $49.7M invested in AC Immune in 2025 Q2 according to their latest regulatory filings, with 4 funds opening new positions, 16 increasing their positions, 12 reducing their positions, and 3 closing their positions.
33% more first-time investments, than exits
New positions opened: 4 | Existing positions closed: 3
33% more repeat investments, than reductions
Existing positions increased: 16 | Existing positions reduced: 12
2% more funds holding
Funds holding: 41 → 42 (+1)
3% more capital invested
Capital invested by funds: $48.5M → $49.7M (+$1.27M)
1.79% less ownership
Funds ownership: 26.2% → 24.4% (-1.8%)
99% less call options, than puts
Call options by funds: $1K | Put options by funds: $93K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$137K |
| 2 |
Acadian Asset Management
Boston,
Massachusetts
|
+$70.5K |
| 3 |
Two Sigma Investments
New York
|
+$53.4K |
| 4 |
Wells Fargo
San Francisco,
California
|
+$46.9K |
| 5 |
Renaissance Technologies
New York
|
+$43.2K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PIM
Platinum Investment Management
Sydney Australia 2000,
Australia
|
-$1.38M |
| 2 |
BlackRock
New York
|
-$1.3M |
| 3 |
Marshall Wace
London,
United Kingdom
|
-$133K |
| 4 |
Dimensional Fund Advisors
Austin,
Texas
|
-$67.6K |
| 5 |
Handelsbanken Fonder
Stockholm,
Sweden
|
-$43.5K |
ACIU Hedge Fund Activity: Q2 2025 in Review
42 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in AC Immune (ACIU) for Q2 2025, worth a combined $49.7M — up 2.6% from $48.5M a quarter earlier.
Buyers outnumbered sellers: 4 funds opened new ACIU positions and 3 closed out — a net gain of 1 holder — while 16 added to existing stakes and 12 trimmed.
The largest buyer was Millennium Management, adding an estimated $137K. The largest seller was Platinum Investment Management, exiting entirely with an estimated $1.38M sold.
- 42 institutional investors held AC Immune (ACIU) as of Q2 2025, up from 41 in Q1 2025.
- Funds reported $49.7M of AC Immune stock for Q2 2025, up 2.6% quarter-over-quarter.
- 4 funds opened new AC Immune positions in Q2 2025 and 3 closed out, a net change of +1 holder.
- The largest AC Immune buyer in Q2 2025 was Millennium Management, an estimated $137K added.
- The largest AC Immune seller in Q2 2025 was Platinum Investment Management, an estimated $1.38M sold.
Based on aggregated 13F filings for Q2 2025.