AC Immune Ownership | Who Owns AC Immune?

AC Immune Ownership Summary

AC Immune is owned by 3.92% institutional investors, 38.02% insiders, and 58.06% retail investors. Bvf inc/il is the largest institutional shareholder, holding 19.59% of ACIU shares. iShares Biotechnology ETF is the top mutual fund, with 0.46% of its assets in AC Immune shares.

ACIU Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	AC Immune	3.92%	38.02%	58.06%
Sector	Healthcare Stocks	232.80%	10.63%	-143.43%
Industry	Biotech Stocks	379.48%	10.37%	-289.85%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Bvf inc/il	19.82M	19.59%	$54.51M
Blackrock	2.61M	2.62%	$10.40M
Wells fargo & company/mn	1.00M	0.99%	$2.76M
Millennium management	792.66K	0.78%	$2.18M
Renaissance	624.37K	0.62%	$1.72M
Blackrock funding, inc. /de	524.28K	0.52%	$1.44M
Arrowstreet capital, limited partnership	405.66K	0.40%	$1.12M
Dimensional fund advisors lp	390.17K	0.39%	$1.07M
Northern trust	278.51K	0.28%	$765.91K
Citadel advisors	267.23K	0.26%	$734.89K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Bvf inc/il	19.82M	1.74%	$54.51M
Dauntless investment group	107.49K	0.20%	$295.60K
Silverberg bernstein capital management	10.00K	0.02%	$27.50K
China universal asset management	17.85K	0.00%	$49.09K
Renaissance	624.37K	0.00%	$1.72M
Gsa capital partners llp	11.53K	0.00%	$32.00K
Quinn opportunity partners	10.10K	0.00%	$27.77K
Millennium management	792.66K	0.00%	$2.18M
Xtx topco	14.30K	0.00%	$39.34K
Banque cantonale vaudoise	7.02K	0.00%	$19.00K

Top Buyers

Holder	Shares	% Assets	Change
Citadel advisors	267.23K	0.00%	196.08K
Dimensional fund advisors lp	390.17K	0.00%	176.70K
Blackrock	2.61M	0.00%	65.48K
Jane street group	57.70K	-	46.99K
Arrowstreet capital, limited partnership	405.66K	0.00%	30.04K

Top Sellers

Holder	Shares	% Assets	Change
Redmile group	-	-	-1.03M
Avidity partners management lp	-	-	-825.00K
Platinum investment management	-	-	-739.34K
Point72 asset management	-	-	-384.85K
Acadian asset management	96.91K	0.00%	-367.79K

New Positions

Holder	Shares	% Assets	Change	Value
Nomura	20.00K	0.00%	20.00K	$79.80K
Hrt financial lp	17.28K	0.00%	17.28K	$47.00K
Private advisor group	16.60K	0.00%	16.60K	$47.97M
Xtx topco	14.30K	0.00%	14.30K	$39.34K
Gsa capital partners llp	11.53K	0.00%	11.53K	$32.00K

Sold Out

Holder	Change
Qube research	-48.00
Sjs investment consulting	-200.00
Sbi securities	-547.00
Lazard asset management	-813.00
Zurcher kantonalbank (zurich cantonalbank)	-3.12K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	31	-26.19%	3,889,775	-84.20%	3	0.66%	13	-35.00%	9	-18.18%
Sep 30, 2025	42	13.51%	24,624,045	1.47%	24	4.19%	20	17.65%	11	-
Jun 30, 2025	40	-4.76%	24,481,622	-5.54%	24	3.66%	18	-	11	-26.67%
Mar 31, 2025	42	-10.64%	25,918,010	-5.30%	25	4.17%	19	-17.39%	14	-
Dec 31, 2024	46	-2.13%	27,366,858	-2.95%	24	3.79%	22	57.14%	14	-30.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Biotechnology ETF	463.54K	0.46%	29.32K
BlackRock Health Sciences Term Trust	258.71K	0.26%	-370.12K
DWS ESG Biotech LC	253.39K	0.25%	-
BlackRock Health Sciences Opps Inv A	115.87K	0.12%	-242.44K
Monega ARIAD Innovation R	92.36K	0.09%	-
ALPS Medical Breakthroughs ETF	79.77K	0.08%	628.00
Dimensional US Small Cap ETF	80.74K	0.08%	-
iShares Nasdaq US Biotech ETF USD Acc	68.17K	0.07%	-
BlackRock Health Sciences	62.90K	0.06%	-15.28K
Blackrock Health Sciences Trust	62.90K	0.06%	-15.28K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Apr 15, 2026	Pfeifer Andrea	Chief Executive Officer	Sell	$31.43K
Apr 15, 2026	Pfeifer Andrea	Chief Executive Officer	Sell	$31.43K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	1	1
2026 Q1	-	-

ACIU Ownership FAQ

Who Owns AC Immune?

AC Immune shareholders are primarily institutional investors at 3.92%, followed by 38.02% insiders and 58.06% retail investors. The average institutional ownership in AC Immune's industry, Biotech Stocks , is 379.48%, which AC Immune falls below.

Who owns the most shares of AC Immune?

AC Immune’s largest shareholders are Bvf inc/il (19.82M shares, 19.59%), Blackrock (2.61M shares, 2.62%), and Wells fargo & company/mn (1M shares, 0.99%). Together, they hold 23.21% of AC Immune’s total shares outstanding.

Does Blackrock own AC Immune?

Yes, BlackRock owns 2.62% of AC Immune, totaling 2.61M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 10.4M$. In the last quarter, BlackRock increased its holdings by 65.48K shares, a 2.58% change.

Who is AC Immune’s biggest shareholder by percentage of total assets invested?

Bvf inc/il is AC Immune’s biggest shareholder by percentage of total assets invested, with 1.74% of its assets in 19.82M AC Immune shares, valued at 54.51M$.

Who is the top mutual fund holder of AC Immune shares?

iShares Biotechnology ETF is the top mutual fund holder of AC Immune shares, with 0.46% of its total shares outstanding invested in 463.54K AC Immune shares.

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