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ACIU

AC Immune SA
$2.18 -0.18 (-7.63%) At close · Jul 16
Market Cap
$220.85M
Shares
101,773,573

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 47
Total Value: $70,046,526
Total Shares: 25,472,951

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 47 13F filers
Top Holder
77.8%
Jun 2023 → Mar 2026 · range 45.6% – 80.8%
of institutional value
Top 5
89.4%
Jun 2023 → Mar 2026 · range 84.7% – 93.0%
of institutional value
Top 10
95.9%
Jun 2023 → Mar 2026 · range 95.2% – 98.3%
of institutional value
HHI
6,101
Jun 2023 → Mar 2026 · range 2,640 – 6,571
Highly concentrated
Showing 51 of 51
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1651625 CUSIP H00263105 13F (30d) 2 filings 2 filers Visit website Investor relations