AC Immune SA (ACIU) Institutional Ownership

Ownership Summary

AC Immune SA (NASDAQ:ACIU) currently has 40 active institutional owners and shareholders as of today (September 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

• The percentage of AC Immune owned by institutions changed from 19.8% in June 2025 to 19.8% in September 2025, marking a slight up trend.
• Institutional share ownership changed by 3.16% QoQ, while the number of institutional owners saw a decrease of 6.98% YoY.
• The latest 13F cycle for AC Immune reveals that of 40 total investors, 19 funds grew their exposure, whereas 11 reduced theirs and 10 made no changes.
• Collectively, institutional investors increased their stake in AC Immune to 24.72Mn shares as of September 2025, a change that is up by 756.91K shares quarter on quarter and down 3.42Mn shares year over year.
• BVF INC/IL's holding of 19.82Mn shares as of September 30, 2025 makes it the primary institutional investor in AC Immune, owning 15.89% of the stock.
• Among the most significant buyers of AC Immune during September 2025 were MILLENNIUM MANAGEMENT LLC (697.90K), Assenagon Asset Management S.A. (189.89K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (21.84K), CITADEL ADVISORS LLC (20.11K), MORGAN STANLEY (19.14K).
• Leading sellers of AC Immune stock in September 2025 included NORTHERN TRUST CORP (99.40K), RENAISSANCE TECHNOLOGIES LLC (57.90K), DIMENSIONAL FUND ADVISORS LP (21.57K), WELLS FARGO & COMPANY/MN (14.09K), TWO SIGMA INVESTMENTS, LP (13.91K).
• The top 10 institutional holders of AC Immune for the quarter ending September 2025 included BVF INC/IL (19.82Mn), WELLS FARGO & COMPANY/MN (1.01Mn), MILLENNIUM MANAGEMENT LLC (989.43K), RENAISSANCE TECHNOLOGIES LLC (770.42K), ACADIAN ASSET MANAGEMENT LLC (413.24K), BlackRock, Inc. (411.85K), NORTHERN TRUST CORP (281.95K), DEUTSCHE BANK AG\ (253.38K), Assenagon Asset Management S.A. (189.89K), DIMENSIONAL FUND ADVISORS LP (177.11K).