AC Immune Ownership | Who Owns AC Immune?

AC Immune Ownership Summary

AC Immune is owned by 24.80% institutional investors, 37.90% insiders, and 37.30% retail investors. Bvf inc/il is the largest institutional shareholder, holding 20.09% of ACIU shares. iShares Biotechnology ETF is the top mutual fund, with 0.44% of its assets in AC Immune shares.

ACIU Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	AC Immune	24.80%	37.90%	37.30%
Sector	Healthcare Stocks	50.50%	12.33%	37.17%
Industry	Biotech Stocks	49.09%	12.06%	38.85%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Bvf inc/il	19.82M	20.09%	$47.18M
Blackrock	2.61M	2.62%	$10.40M
Wells fargo & company/mn	1.00M	1.02%	$2.39M
Renaissance	840.13K	0.85%	$2.00M
Millennium management	773.59K	0.78%	$1.84M
Blackrock funding, inc. /de	519.27K	0.53%	$1.24M
Dimensional fund advisors lp	340.08K	0.34%	$812.14K
Arrowstreet capital, limited partnership	232.95K	0.24%	$554.43K
Citadel advisors	207.61K	0.21%	$494.10K
Morgan stanley	131.81K	0.13%	$313.72K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Bvf inc/il	19.82M	1.21%	$47.18M
Verdad advisers, lp	16.30K	0.04%	$38.79K
Silverberg bernstein capital management	10.00K	0.01%	$23.80K
Renaissance	840.13K	0.00%	$2.00M
Axq capital, lp	10.40K	0.00%	$24.75K
Banque cantonale vaudoise	7.02K	0.00%	$17.00K
China universal asset management	16.20K	0.00%	$38.55K
Quinn opportunity partners	10.10K	0.00%	$24.04K
Millennium management	773.59K	0.00%	$1.84M
Activest wealth management	1.00K	0.00%	$2.38K

Top Buyers

Holder	Shares	% Assets	Change
Renaissance	840.13K	0.00%	215.76K
Qube research	92.35K	0.00%	92.35K
Blackrock	2.61M	0.00%	65.48K
Two sigma investments, lp	102.83K	0.00%	63.73K
Morgan stanley	131.81K	-	42.56K

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
Northern trust	-	-	-278.51K

New Positions

Holder	Shares	% Assets	Change	Value
Qube research	92.35K	0.00%	92.35K	$219.79K
Nomura	20.00K	0.00%	20.00K	$79.80K
Private advisor group	16.60K	0.00%	16.60K	$47.97M
Verdad advisers, lp	16.30K	0.04%	16.30K	$38.79K
Quadrature capital	12.99K	0.00%	12.99K	$30.92K

Sold Out

Holder	Change
Sjs investment consulting	-200.00
Lazard asset management	-813.00
Zurcher kantonalbank (zurich cantonalbank)	-3.12K
Simplex trading	-6.62K
Compagnie lombard odier scma	-10.00K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	47	-7.84%	24,469,719	-2.43%	24	3.84%	17	-22.73%	15	-11.76%
Mar 31, 2026	29	-38.30%	3,698,006	-85.65%	3	0.54%	16	-23.81%	9	-18.18%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Biotechnology ETF	446.00K	0.44%	-1.36K
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
iShares Nasdaq US Biotech ETF USD Acc	81.27K	0.08%	-
Dimensional US Small Cap ETF	80.74K	0.08%	-
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
May 15, 2026	Pfeifer Andrea	Chief Executive Officer	Sell	$27.93K
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 24.80%, followed by 37.90% insiders and 37.30% retail investors. The average institutional ownership in AC Immune's industry, Biotech Stocks , is 49.09%, 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, 20.09%), Blackrock (2.61M shares, 2.62%), and Wells fargo & company/mn (1M shares, 1.02%). Together, they hold 23.73% 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 1.21% of its assets in 19.82M AC Immune shares, valued at 47.18M$.

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 0.44% of its total shares outstanding invested in 446K AC Immune shares.

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