Estimated market cap $216.71MShares outstanding from the company’s latest SEC filing (all share classes, each priced at its own close; ADRs converted to ADS) × last close from Tiingo. Updated daily. This figure: shares as of Dec 31, 2025, last close Nov 13, 2026.101.74M shares, shares as of Dec 31, 2025CIK 1651625The SEC’s Central Index Key, the number it uses to identify every company and person that files.
Insider trades, 12 mo
0 buys · 2 sells
$59.3K sold, open market
Congress trades, 24 mo
—
No disclosed trades
13F holders
…
Lobbying, 12 mo
—
No lobbying filings
Federal contracts, 12 mo
—
None matched
Ask your AI:
Latest 10-Q
What changed in AC Immune SA's latest quarterly report, compared with the one before.
We have not read a recent 10-Q for this company yet.
Insider trades
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
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13F holders
Funds that report this stock, checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
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Top 10 holders.Premium lists every holder, with CSV downloads.
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
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Lobbying
What AC Immune SA and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
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Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
13F holders, Q3 2026Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
24
9 added · 8 trimmed
Insider trades
2 in 12 mo
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
No open-market insider trades reported since May 15, 2026. Insiders have two business days to file.
Recent insider trades
How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss.
24 funds report ACIU. Values checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
Funds own 24% of shares (Q2 2026)Fund managers with more than $100 million in US-listed stocks file a 13F each quarter. It lists their long stock positions only (shorts, options and bonds are left out) and can arrive up to 45 days after the quarter ends, so this is a snapshot of the quarter end. We add up the shares every fund reports in this class and divide by the shares outstanding. The total can pass 100%: the same shares are often reported by more than one manager (an adviser and the fund it runs), lent shares can be reported twice, and the share count can be out of date after buybacks. We divided 24.47M reported shares by 101.74M shares, from the cover page of the company’s filing as of Dec 31, 2025.
43 funds hold the stock.
Q3 2026: 2.2% · 5,560 of ~8,900 funds reported so farFunds have 45 days after a quarter ends to file. This quarter’s reports are still arriving, so the figure only counts the funds that have filed so far and will usually rise.
Q2 202524%
Q3 202524%
Q4 202525%
Q1 202625%
Q2 202624%
Q3 2026 (so far)2.2%
Q3 2026. 1 new, 9 added to, 8 trimmed, 21 exited since Q2 2026.
Download CSVEvery fund that holds ACIU, not only these ten. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.
Trades by members of Congress
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
No recent congressional trades for this company.
Lobbying
What AC Immune SA and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
No recent lobbying filings for this company.
Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
Funds holding the stock
Shares they report
Funds holding the stock by quarter
Q3 2016
31
—
7.97M
$131.2M
Q4 2016
19
-12
8.75M
$112.8M
Q1 2017
18
-1
10.48M
$108.5M
Q2 2017
17
-1
10.28M
$90.4M
Q3 2017
15
-2
9.74M
$109.9M
Q4 2017
22
+7
11.18M
$143.1M
Q1 2018
18
-4
11.28M
$116.7M
Q2 2018
15
-3
11.00M
$102.4M
Q3 2018
32
+17
19.17M
$153.4M
Q4 2018
39
+7
20.34M
$192.2M
Q1 2019
41
+2
17.98M
$90.8M
Q2 2019
40
-1
18.07M
$100.3M
Q3 2019
36
-4
18.79M
$93.0M
Q4 2019
48
+12
19.12M
$162.9M
Q1 2020
50
+2
20.17M
$139.4M
Q2 2020
42
-8
20.39M
$137.2M
Q3 2020
53
+11
20.72M
$101.1M
Q4 2020
47
-6
19.94M
$103.1M
Q1 2021
51
+4
18.21M
$138.5M
Q2 2021
57
+6
18.19M
$144.3M
Q3 2021
64
+7
17.66M
$118.5M
Q4 2021
44
-20
15.13M
$74.9M
Q1 2022
36
-8
14.29M
$57.2M
Q2 2022
35
-1
13.80M
$49.8M
Q3 2022
34
-1
14.02M
$44.3M
Q4 2022
37
+3
14.76M
$30.1M
Q1 2023
34
-3
14.10M
$33.0M
Q2 2023
31
-3
16.03M
$47.4M
Q3 2023
28
-3
15.98M
$45.5M
Q4 2023
32
+4
31.40M
$157.0M
Q1 2024
37
+5
31.75M
$94.0M
Q2 2024
45
+8
28.58M
$114.1M
Q3 2024
43
-2
28.21M
$106.6M
Q4 2024
45
+2
27.37M
$73.9M
Q1 2025
41
-4
25.92M
$48.5M
Q2 2025
42
+1
24.50M
$49.7M
Q3 2025
40
-2
24.63M
$71.2M
Q4 2025
42
+2
25.88M
$81.2M
Q1 2026
46
+4
25.08M
$69.0M
Q2 2026
43
-3
24.47M
$58.2M
Q3 2026
24
-19
2.29M
$6.0M
Each point is a quarter-end, from Q3 2016 to Q3 2026. A fund's 13F lists its long positions in US-listed securities as of the last day of the quarter and arrives up to 45 days later, so each point shows holdings at quarter-end, not on the day they were reported.
Common shares only; options and bonds are left out. When a fund amends a report, the amended version is the one counted.
The history follows the company's current CUSIP number (H00263105). If the company's shares were ever re-issued under a different CUSIP, the quarters before the change are not part of this series, so the first point (Q3 2016) can be later than the stock's first appearance in 13F reports.
Share counts are adjusted for stock splits; none took place between these quarters. Values are in dollars as reported at the time and are not adjusted.
A quarter appears once our daily update has built its summary. If a summary cannot be built, older reports are kept and the chart shows the quarters it has until the next update repairs it.