ACIU · AC Immune SA · Shareholders & Ownership

$2.51 +0.08 (+3.08%)

Market Cap

$246.58M

99.43M

Volume · Oct 20 75.39K Avg daily vol (3M) 196.62K

Every disclosed holder of ACIU in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ACIU

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: shares outstanding cannot be set against these holders.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	43	24,469,719	—	Yes
Insiders (Forms 3, 4, 5)	9	4,498,061	—	Yes
13D/G-only blocks	2	21,149,336	—	Yes
Registered funds (N-PORT, not summed)	6	106,270	—	No

% Out is unavailable: a foreign private issuer reports ordinary shares, a different unit from the listed shares.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ACIU

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BVF INC/IL 13F CIK 1056807 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	19,822,436	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
2	BIOTECHNOLOGY VALUE FUND L P 13G CIK 918923 · Unknown · Dec 15, 2023 Rule 13d-1(c), passive investor	14,571,236	—	—	Dec 15, 2023	Rule 13d-1(c), passive investor
3	Affiris AG in Liqu 13G CIK 1876820 · Unknown · Dec 15, 2023 Rule 13d-1(d), exempt investor	6,578,100	—	—	Dec 15, 2023	Rule 13d-1(d), exempt investor
4	Pfeifer Andrea Insider CIK 1697107 · May 15, 2026 Director, Chief Executive Officer, issuer-wide	3,834,288	—	-10,000	May 15, 2026	Director, Chief Executive Officer, issuer-wide
5	WELLS FARGO & COMPANY/MN 13F CIK 72971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,004,041	—	-243	Jun 30, 2026	carried, not yet filed for the newest quarter
6	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	840,127	—	+215,760	Jun 30, 2026	carried, not yet filed for the newest quarter
7	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	773,594	—	-19,063	Jun 30, 2026	carried, not yet filed for the newest quarter
8	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	519,274	—	-5,004	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	iShares Neuroscience and Healthcare ETF Fund S000076483 · Registered fund · Jul 31, 2026 iShares Trust, not summed	3,783	—	+433	Jul 31, 2026	iShares Trust, not summed
9	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	340,082	—	-50,083	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	80,741	—	0	Jul 31, 2026	Dimensional ETF Trust, not summed
9.2	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	7,863	—	0	Jul 31, 2026	Dimensional ETF Trust, not summed
9.3	Dimensional US Core Equity 1 ETF Fund S000081780 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	5,748	—	0	Jul 31, 2026	Dimensional ETF Trust, not summed
9.4	Dimensional US Sustainability Core 1 ETF Fund S000076639 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	2,823	—	0	Jul 31, 2026	Dimensional ETF Trust, not summed
10	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 13F CIK 1164508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	232,953	—	-172,705	Jun 30, 2026	carried, not yet filed for the newest quarter
11	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	207,606	—	-59,627	Jun 30, 2026	carried, not yet filed for the newest quarter
12	Roberts Christopher James Insider CIK 2112626 · Mar 18, 2026 Chief Financial Officer, issuer-wide	155,382	—	—	Mar 18, 2026	Chief Financial Officer, issuer-wide
13	Donati Piergiorgio Insider CIK 2122783 · Mar 20, 2026 Chief Operating Officer, issuer-wide	141,120	—	—	Mar 20, 2026	Chief Operating Officer, issuer-wide
14	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	131,815	—	+42,562	Jun 30, 2026	carried, not yet filed for the newest quarter
15	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	102,825	—	+63,734	Jun 30, 2026	carried, not yet filed for the newest quarter
16	Twyman Roy Ervin Insider CIK 2117542 · Jun 11, 2026 Director, issuer-wide	92,556	—	+16,568	Jun 11, 2026	Director, issuer-wide
17	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	92,351	—	+92,351	Jun 30, 2026	carried, not yet filed for the newest quarter
18	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	85,614	—	-16,015	Jun 30, 2026	carried, not yet filed for the newest quarter
19	Buetler Monika Insider CIK 2115138 · Jun 11, 2026 Director, issuer-wide	71,656	—	+17,751	Jun 11, 2026	Director, issuer-wide
20	Zuegel Martin Insider CIK 1484988 · Jun 11, 2026 Director, issuer-wide	71,408	—	+33,136	Jun 11, 2026	Director, issuer-wide
21	June Carl Howard Insider CIK 2116422 · Jun 11, 2026 Director, issuer-wide	67,556	—	+16,568	Jun 11, 2026	Director, issuer-wide
22	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	61,854	—	-1,747	Jun 30, 2026	carried, not yet filed for the newest quarter
23	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	53,369	—	-35,893	Jun 30, 2026	carried, not yet filed for the newest quarter
24	AGUIAR-LUCANDER RENEE Insider CIK 1591617 · Jun 11, 2026 Director, issuer-wide	51,136	—	+16,568	Jun 11, 2026	Director, issuer-wide
25	Jump Financial, LLC 13F CIK 1831577 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	24,064	—	+12,939	Jun 30, 2026	carried, not yet filed for the newest quarter
26	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	19,475	—	-38,221	Jun 30, 2026	carried, not yet filed for the newest quarter
27	Verdad Advisers, LP 13F CIK 1812822 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	16,300	—	+16,300	Jun 30, 2026	carried, not yet filed for the newest quarter
28	China Universal Asset Management Co., Ltd. 13F CIK 1906594 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	16,197	—	-1,655	Jun 30, 2026	carried, not yet filed for the newest quarter
29	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	14,497	—	-7,135	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Quadrature Capital Ltd 13F CIK 1651424 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	12,991	—	+12,991	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Graney Thomas Insider CIK 1618275 · Oct 2, 2026 Director, issuer-wide	12,959	—	—	Oct 2, 2026	Director, issuer-wide
32	AXQ CAPITAL, LP 13F CIK 1916908 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,398	—	+10,398	Jun 30, 2026	carried, not yet filed for the newest quarter
33	SG Americas Securities, LLC 13F CIK 1313360 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	10,327	—	+10,327	Jun 30, 2026	carried, not yet filed for the newest quarter
34	Quinn Opportunity Partners LLC 13F CIK 1633275 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,100	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Silverberg Bernstein Capital Management LLC 13F CIK 2007880 · Registered investment adviser · Sep 30, 2026	10,000	—	0	Sep 30, 2026
36	EFG International AG 13F CIK 2109868 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	9,900	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
37	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	7,798	—	+158	Jun 30, 2026	carried, not yet filed for the newest quarter
38	BARCLAYS PLC 13F CIK 312069 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	7,278	—	+1,487	Jun 30, 2026	carried, not yet filed for the newest quarter
39	Banque Cantonale Vaudoise 13F CIK 1793755 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	7,021	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
40	Invesco Nasdaq Biotechnology ETF Fund S000072469 · Registered fund · May 31, 2026 Invesco Exchange-Traded Fund Trust II, not summed	5,312	—	-278	May 31, 2026	Invesco Exchange-Traded Fund Trust II, not summed
41	Mirae Asset Global Investments Co., Ltd. 13F CIK 1569395 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	4,552	—	-695	Jun 30, 2026	carried, not yet filed for the newest quarter
42	Tower Research Capital LLC (TRC) 13F CIK 1533421 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	4,101	—	-2,908	Jun 30, 2026	carried, not yet filed for the newest quarter
43	CITIGROUP INC 13F CIK 831001 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	4,012	—	+1,201	Jun 30, 2026	carried, not yet filed for the newest quarter
44	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	2,699	—	+289	Jun 30, 2026	carried, not yet filed for the newest quarter
45	GF FUND MANAGEMENT CO. LTD. 13F CIK 2057060 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,084	—	-158	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Forum Finance Group S.A. 13F CIK 2133354 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,000	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
47	ROYAL BANK OF CANADA 13F CIK 1000275 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,289	—	+429	Jun 30, 2026	carried, not yet filed for the newest quarter
48	SBI Securities Co., Ltd. 13F CIK 1851815 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,197	—	+1,197	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Activest Wealth Management 13F CIK 1883134 · Registered investment adviser · Sep 30, 2026	1,000	—	0	Sep 30, 2026
50	PNC FINANCIAL SERVICES GROUP, INC. 13F CIK 713676 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,000	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 55 holders

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Key facts CIK 1651625 CUSIP H00263105 13F (30d) 4 filings 4 filers Visit website Investor relations