ACIU Institutional Ownership
Who owns AC Immune SA and what the big funds did with it last quarter, from every SEC 13F filing. 43 funds reported holding ACIU at Jun 30, 2026.
- ▼16 buying vs 24 selling
- ▼Shares held by funds -2.4%
- ▼Funds holding -3
- ▼Superinvestors: 1 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 43 | 46 | −6.5% |
| In funds' top 10 | 0 | 0 | – |
| 13F shares | 24.5M | 25.1M | −2.4% |
| Held by funds | – | – | – |
| New positions | 6 | 8 | −25.0% |
| Increased | 10 | 13 | −23.1% |
| Reduced | 15 | 16 | −6.3% |
| Sold out | 9 | 4 | +125.0% |
| Calls (shares) | 0 | 293K | −100.0% |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | 0.00 | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ACIU
All superinvestors →
Who owns ACIU
share of fund held shares- Index and passive funds3.8%
- Active managers and hedge funds90.8%
- Banks and brokers5.4%
- Pensions, insurers and other0.0%
The top 10 holders own 98.0% of all ACIU shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
5 funds changed their position- China Universal Asset Management Co., Ltd.Added+2,373 sh
- Mirae Asset Global Investments Co., Ltd.Added+649 sh
- GF Fund Management Co. Ltd.Added+185 sh
- SBI Securities Co., Ltd.Added+5 sh
- Caitong International Asset Management Co., LtdTrimmed−3 sh
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Bvf Inc/il | – | 19.8M | $47.2M | 0 |
| 2 | Wells Fargo & Company/mn | – | 1M | $2.4M | −243 |
| 3 | Renaissance Technologies LLC | – | 840K | $2M | +216K |
| 4 | Millennium Management LLC | – | 774K | $1.8M | −19K |
| 5 | BlackRock, Inc. | – | 519K | $1.2M | −5,004 |
| 6 | Dimensional Fund Advisors LP | – | 340K | $812K | −50K |
| 7 | Arrowstreet Capital, Limited Partnership | – | 233K | $554K | −173K |
| 8 | Citadel Advisors LLC | – | 208K | $494K | −60K |
| 9 | Morgan Stanley | – | 132K | $314K | +43K |
| 10 | Two Sigma Investments, LP | – | 103K | $245K | +64K |
- Renaissance Technologies LLC+216K sh+$514K
- Qube Research & Technologies Ltd+92K sh+$220K
- Two Sigma Investments, LP+64K sh+$152K
- Morgan Stanley+43K sh+$101K
- Verdad Advisers, LP+16K sh+$39K
- Quadrature Capital Ltd+13K sh+$31K
- Jump Financial, LLC+13K sh+$31K
- SG Americas Securities, LLC+10K sh+$25K
- Northern Trust Corp−279K sh−$766K
- Arrowstreet Capital, Limited Partnership−173K sh−$411K
- Marshall Wace, LLP−131K sh−$362K
- Dauntless Investment Group, LLC−107K sh−$296K
- Acadian Asset Management LLC−97K sh−$266K
- Citadel Advisors LLC−60K sh−$142K
- Dimensional Fund Advisors LP−50K sh−$120K
- Jane Street Group, LLC−38K sh−$91K
ACIU institutional ownership FAQ
Who owns the most ACIU stock?
In Q2 2026 13F filings the largest holder of ACIU was Bvf Inc/il, followed by Wells Fargo & Company/mn and Renaissance Technologies LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of ACIU is owned by institutions?
43 funds reported holding 24.5M ACIU shares at Jun 30, 2026.
Are hedge funds buying ACIU?
In Q2 2026, 16 funds bought ACIU (6 of them new positions) and 24 sold (9 sold out completely). Among well known investors, 1 added and 2 cut. Our fund sentiment for ACIU is strongly bearish.
What is ACIU's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this ACIU ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.