ACIU Insider Trading

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About

Insider Ownership Percentage: 4.60%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $27,900.00

AC Immune Insider Trading History Chart

AC Immune Share Price & Price History

^$2.77

▼ -0.02 (-0.72%)

As of 05/18/2026 04:00 PM ET

Days: 30 | 90 | 365

AC Immune Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction	Details
5/15/2026	Andrea Pfeifer	CEO	Sell	10,000	$2.79	$27,900.00	3,820,288

SEC Filings (Institutional Ownership Changes) for AC Immune (NASDAQ:ACIU)

51.36% of AC Immune stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

AC Immune Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
5/14/2026	Renaissance Technologies LLC	624,367	$1.72M	0.0%	-6.7%	0.614%
5/14/2026	Arrowstreet Capital Limited Partnership	405,658	$1.12M	0.0%	+8.0%	0.399%
5/7/2026	Dimensional Fund Advisors LP	390,165	$1.07M	0.0%	+82.8%	0.383%
2/18/2026	Millennium Management LLC	933,342	$2.93M	0.0%	-5.7%	0.930%
2/17/2026	EFG International AG	12,900	$41K	0.0%	N/A	0.013%
2/13/2026	Marshall Wace LLP	186,709	$0.59M	0.0%	N/A	0.186%
2/13/2026	Wells Fargo & Company MN	1,006,289	$3.16M	0.0%	-0.4%	1.002%
2/12/2026	Renaissance Technologies LLC	668,867	$2.10M	0.0%	-13.2%	0.666%
2/12/2026	Dimensional Fund Advisors LP	213,464	$0.67M	0.0%	+20.5%	0.213%
2/10/2026	Goldman Sachs Group Inc.	18,555	$58K	0.0%	+46.9%	0.018%
2/6/2026	Banque Cantonale Vaudoise	7,892	$25K	0.0%	-57.2%	0.008%
11/17/2025	Susquehanna International Group LLP	21,840	$63K	0.0%	N/A	0.022%
11/14/2025	Two Sigma Investments LP	16,775	$48K	0.0%	-45.3%	0.017%
11/13/2025	Sei Investments Co.	15,884	$46K	0.0%	-36.2%	0.016%
11/13/2025	Private Advisor Group LLC	16,600	$48K	0.0%	N/A	0.017%
11/12/2025	Dimensional Fund Advisors LP	177,111	$0.51M	0.0%	-10.9%	0.176%
10/7/2025	Assenagon Asset Management S.A.	189,892	$0.55M	0.0%	N/A	0.189%
8/14/2025	Sei Investments Co.	24,897	$51K	0.0%	N/A	0.025%
8/13/2025	Marshall Wace LLP	135,841	$0.28M	0.0%	-36.0%	0.135%
8/12/2025	Handelsbanken Fonder AB	105,000	$0.21M	0.0%	-19.2%	0.105%
5/21/2025	Acadian Asset Management LLC	371,177	$0.68M	0.0%	+87.1%	0.370%
5/16/2025	BVF Inc. IL	19,822,436	$37.07M	1.5%	+1.5%	19.741%
5/8/2025	Banque Cantonale Vaudoise	26,712	$50K	0.0%	N/A	0.027%
4/15/2025	Handelsbanken Fonder AB	130,000	$0.24M	0.0%	-13.3%	0.129%
2/17/2025	Squarepoint Ops LLC	43,784	$0.12M	0.0%	N/A	0.044%
2/17/2025	Two Sigma Advisers LP	13,410	$36K	0.0%	N/A	0.014%
2/17/2025	Two Sigma Investments LP	40,818	$0.11M	0.0%	-28.8%	0.041%
2/17/2025	Redmile Group LLC	1,034,299	$2.79M	0.2%	-38.9%	1.045%
2/17/2025	Millennium Management LLC	119,040	$0.32M	0.0%	-28.3%	0.120%
2/17/2025	Cantor Fitzgerald L. P.	25,000	$68K	0.0%	N/A	0.025%
2/14/2025	Jane Street Group LLC	24,283	$66K	0.0%	N/A	0.025%
2/14/2025	Northern Trust Corp	403,031	$1.09M	0.0%	N/A	0.407%
2/14/2025	Boothbay Fund Management LLC	14,046	$38K	0.0%	N/A	0.014%
2/14/2025	Dimensional Fund Advisors LP	131,410	$0.36M	0.0%	+130.3%	0.133%
2/13/2025	Marshall Wace LLP	66,318	$0.18M	0.0%	-33.3%	0.067%
2/13/2025	Quinn Opportunity Partners LLC	10,100	$27K	0.0%	N/A	0.010%
2/13/2025	Renaissance Technologies LLC	740,198	$2M	0.0%	+14.6%	0.748%
2/13/2025	Wells Fargo & Company MN	995,636	$2.69M	0.0%	-10.1%	1.006%
2/12/2025	RPO LLC	18,728	$51K	0.0%	N/A	0.019%
2/12/2025	Geode Capital Management LLC	64,090	$0.17M	0.0%	+9.9%	0.065%
11/16/2024	Geode Capital Management LLC	58,296	$0.22M	0.0%	+6.4%	0.059%
11/15/2024	Redmile Group LLC	1,694,167	$6.40M	0.4%	-6.3%	1.712%
11/8/2024	Banque Cantonale Vaudoise	18,562	$70K	0.0%	-27.0%	0.019%
10/25/2024	China Universal Asset Management Co. Ltd.	19,021	$72K	0.0%	+63.7%	0.019%
10/23/2024	Assenagon Asset Management S.A.	223,880	$0.85M	0.0%	-49.1%	0.226%
9/16/2024	Cubist Systematic Strategies LLC	54,610	$0.22M	0.0%	N/A	0.055%
8/14/2024	Cubist Systematic Strategies LLC	54,610	$0.22M	0.0%	N/A	0.055%
8/9/2024	Renaissance Technologies LLC	652,079	$2.60M	0.0%	+26.4%	0.659%
8/8/2024	Vanguard Capital Wealth Advisors	14,000	$56K	0.0%	N/A	0.014%
7/31/2024	Banque Cantonale Vaudoise	25,418	$0.10M	0.0%	-53.0%	0.026%
7/18/2024	Assenagon Asset Management S.A.	439,730	$1.76M	0.0%	+294.7%	0.445%
7/12/2024	Silverberg Bernstein Capital Management LLC	10,000	$40K	0.0%	N/A	0.010%
5/16/2024	Redmile Group LLC	2,007,031	$5.94M	0.2%	+0.4%	2.029%
5/15/2024	Lazard Asset Management LLC	10,260	$30K	0.0%	N/A	0.010%
5/14/2024	Platinum Investment Management Ltd.	1,095,026	$3.24M	0.1%	-27.7%	1.107%
5/1/2024	BNP Paribas Financial Markets	11,092	$33K	0.0%	+315.6%	0.011%
4/29/2024	China Universal Asset Management Co. Ltd.	19,008	$56K	0.0%	+96.5%	0.019%
2/15/2024	BVF Inc. IL	14,571,236	$72.86M	1.8%	+96.2%	17.254%
2/14/2024	Avidity Partners Management LP	4,469,080	$22.35M	0.8%	+50.5%	5.292%
2/14/2024	Platinum Investment Management Ltd.	1,515,585	$7.58M	0.3%	+14.6%	1.795%
2/9/2024	Nixon Peabody Trust Co.	12,850	$64K	0.0%	N/A	0.015%
1/24/2024	China Universal Asset Management Co. Ltd.	9,674	$48K	0.0%	N/A	0.011%
11/14/2023	Avidity Partners Management LP	2,969,800	$8.46M	0.3%	+2.3%	3.552%
8/11/2023	Platinum Investment Management Ltd.	1,322,462	$3.91M	0.1%	+22.2%	1.582%
8/9/2023	Banque Cantonale Vaudoise	80,701	$0.24M	0.0%	+22.6%	0.097%
5/11/2023	Citigroup Inc.	870,179	$2.04M	0.0%	N/A	1.041%
4/20/2023	Banque Cantonale Vaudoise	65,803	$0.15M	0.0%	+54.9%	0.079%
4/18/2023	Assenagon Asset Management S.A.	111,418	$0.26M	0.0%	-81.2%	0.133%
2/15/2023	Avidity Partners Management LP	325,400	$0.66M	0.0%	+18.4%	0.389%
2/13/2023	Platinum Investment Management Ltd.	1,082,462	$2.21M	0.1%	+2.2%	1.296%
2/10/2023	Banque Cantonale Vaudoise	42,488	$86K	0.0%	+92.6%	0.051%
1/12/2023	Assenagon Asset Management S.A.	592,044	$1.21M	0.0%	N/A	0.709%
11/10/2022	Kingsbury Capital Investment Advisors LLC	27,291	$86K	0.1%	+44.6%	0.033%
8/11/2022	Platinum Investment Management Ltd.	1,059,462	$3.83M	0.1%	-0.3%	1.268%
5/16/2022	Eversept Partners LP	124,589	$0.50M	0.0%	-18.8%	0.149%
5/11/2022	Handelsbanken Fonder AB	101,064	$0.40M	0.0%	N/A	0.121%
5/9/2022	Banque Cantonale Vaudoise	21,617	$86K	0.0%	-57.6%	0.026%
2/17/2022	Metatron Capital SICAV plc	44,000	$0.22M	0.2%	N/A	0.061%
2/14/2022	Lombard Odier Asset Management Switzerland SA	348,196	$1.72M	0.1%	+9.2%	0.479%
2/14/2022	Virtus ETF Advisers LLC	32,852	$0.16M	0.1%	+14.5%	0.045%
2/14/2022	Eversept Partners LP	153,380	$0.76M	0.1%	-30.8%	0.211%
2/14/2022	GSA Capital Partners LLP	73,046	$0.36M	0.0%	N/A	0.101%
2/8/2022	ProShare Advisors LLC	11,230	$56K	0.0%	-34.1%	0.015%

Data available starting January 2016

AC Immune SA, a clinical stage biopharmaceutical company, discovers, designs, and develops medicines and diagnostic products for the prevention and treatment of neurodegenerative diseases associated with protein misfolding. Its SupraAntigen and Morphomer platforms are designed to generate vaccines, antibodies, and small molecules, which selectively interact with misfolded proteins that are common in a range of neurodegenerative diseases. The company is developing Crenezumab, a humanized, conformation-specific monoclonal antibody, which is in Phase II clinical studies trial for the treatment of Alzheimer's disease (AD). It is also developing ACI-24, an anti-Abeta vaccine candidate that is in Phase II clinical study for AD, as well as completed Phase Ib clinical study for Down syndrome; ACI-35, an anti-Tau vaccine candidate that is in Phase Ib/2a clinical study; and Tau- positron emission tomography (PET) imaging tracer, which is in Phase II clinical study. In addition, the company is researching and developing small molecule Tau aggregation inhibitors for AD and NeuroOrphan indications. Further, it has discovery and preclinical stage molecules targeting range of neurodegenerative diseases, which include diagnostics targeting TDP-43, alpha-synuclein, and NLRP3. AC Immune SA has license agreements and collaborations with Genentech, Inc.; Biogen International GmbH; Janssen Pharmaceuticals, Inc.; Life Molecular Imaging SA; Eli Lilly and Company; and WuXi Biologics. The company was incorporated in 2003 and is headquartered in Lausanne, Switzerland.

Today's Range

Now: $2.77

$2.74

$2.90

50 Day Range

MA: $2.95

$2.56

$3.40

52 Week Range

Now: $2.77

$1.60

$4.00

Volume

224,826 shs

Average Volume

264,887 shs

Market Capitalization

$281.90 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.65

Who are the company insiders with the largest holdings of AC Immune?: AC Immune's top insider investors include:
Andrea Pfeifer (CEO)
Learn More about top insider investors at AC Immune.
Who are the major institutional investors of AC Immune?: AC Immune's top institutional shareholders include:
Renaissance Technologies LLC — 0.61%
Arrowstreet Capital Limited Partnership — 0.40%
Dimensional Fund Advisors LP — 0.38%
Learn More about top institutional investors of AC Immune stock.
Which institutional investors are selling AC Immune stock?: In the previous quarter, ACIU stock was sold by these institutional investors:
Renaissance Technologies LLC
Which institutional investors are buying AC Immune stock?: During the last quarter, ACIU stock was acquired by institutional investors including:
Dimensional Fund Advisors LP
Arrowstreet Capital Limited Partnership