AC Immune
Develops protein-misfolding therapies and diagnostics for neurodegenerative diseases.
$2.65
After-hours close−0.02 (−0.56%)
At close$2.67(−1.66%)
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Breakdown13F · Form 4
Institutions 24.04%24.47M sharesInsiders 4.39%4.47M sharesOther 71.57%72.83M shares
Shares outstanding 101.77M · Float 62.57M · 61.5% free float
Institutions13F, as of Jun 30, 2026
47 holders · 24.47M shares · 6 new positions · 17 increased · 15 reduced · 10 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BVF Inc/IL | 19.82M | 19.48% | 0 | Aug 14, 2026 |
| Wells Fargo & Company/MN | 1.00M | 0.99% | −243 | Aug 14, 2026 |
| Renaissance Technologies LLC | 840.1K | 0.83% | +215.8K | Aug 13, 2026 |
| Millennium Management LLC | 773.6K | 0.76% | −19.1K | Aug 14, 2026 |
| BlackRock, Inc. | 519.3K | 0.51% | −5.0K | Aug 7, 2026 |
| Dimensional Fund Advisors LP | 340.1K | 0.33% | −50.1K | Aug 11, 2026 |
| Arrowstreet Capital, Limited Partnership | 233.0K | 0.23% | −172.7K | Aug 13, 2026 |
| Citadel Advisors LLC | 207.6K | 0.20% | −59.6K | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
No 13D/G filer at 5% or more on record.
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Andrea Pfeifer | director, officer: Chief Executive Officer | 3.82M | 3.75% | May 18, 2026 |
| Christopher James Roberts | officer: Chief Financial Officer | 155.4K | 0.15% | Mar 18, 2026 |
| Piergiorgio Donati | officer: Chief Operating Officer | 141.1K | 0.14% | Mar 20, 2026 |
| Roy Ervin Twyman | director | 92.6K | 0.09% | Jun 15, 2026 |
| Monika Buetler | director | 71.7K | 0.07% | Jun 15, 2026 |
| Martin Zuegel | director, officer: Interim CEO | 71.4K | 0.07% | Jun 15, 2026 |
| Carl Howard June | director | 67.6K | 0.07% | Jun 15, 2026 |
| Renee Aguiar-Lucander | director | 51.1K | 0.05% | Jun 15, 2026 |
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| May 15, 2026 | Andrea Pfeiferdirector, officer: Chief Executive Officer | Sale | 10,000 | $2.79 | 3,820,288 |
| Apr 15, 2026 | Andrea Pfeiferdirector, officer: Chief Executive Officer | Purchase | 10,000 | $3.14 | 3,830,288 |
| Apr 15, 2026 | Andrea Pfeiferdirector, officer: Chief Executive Officer | Sale | 10,000 | $3.14 | 3,830,288 |
CongressHouse and Senate disclosures
Not reported.