Switzerland Pharmaceuticals

AC Immune SA (ACIU)

Track

AC Immune SA experienced insider trading activity primarily involving CEO Andrea Pfeifer. The most recent transactions occurred on May 15, 2026, consisting of a proposed sale and a direct share disposal. These filings represent the latest recorded movements, as no significant equity changes have been reported by company leadership within the preceding three-month period.
Ticker: ACIU Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for AC Immune SA. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Pfeifer Andrea Chief Executive Officer Executive Director
Transaction date
Sale
Price
368.81
Quantity 86,897 +21.9%
Value US$2,810,208
ANDREA M.A PFEIFER Director; Officer Executive Director
Transaction date
Proposed sale
Price
114.36
Quantity 32,752
Value US$3,826,355
ANDREA M.A PFEIFER Officer Officer
Transaction date
Proposed sale
Price
58.47
Quantity 34,238
Value US$3,464,653
ANDREA M.A PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.67
Quantity 30,000
Value US$110,100
ANDREA M.A PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.13
Quantity 45,000
Value US$140,850
ANDREA M.A PFEIFER Officer Officer
Transaction date
Proposed sale
Price
2.38
Quantity 35,000
Value US$83,300
ANDREA M.A PFEIFER Officer Officer
Transaction date
Proposed sale
Price
2.34
Quantity 20,000
Value US$46,800
ANDREA M. A PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.70
Quantity 40,000
Value US$148,000
ANDREA M. A PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.46
Quantity 20,000
Value US$69,200
AFFIRIS AG in Liqu 10% Stockholder Large shareholder
Transaction date
Proposed sale
Price
3.33
Quantity 150,000
Value US$499,500
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
4.97
Quantity 94,000
Value US$467,180
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.71
Quantity 95,000
Value US$352,450
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.69
Quantity 20,000
Value US$73,800
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.50
Quantity 20,000
Value US$70,000
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.08
Quantity 16,990
Value US$52,329
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.05
Quantity 1,509
Value US$4,602
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.05
Quantity 200
Value US$610
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.11
Quantity 1,567
Value US$4,873
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
2.95
Quantity 3,667
Value US$10,818
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.05
Quantity 200
Value US$610
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
2.92
Quantity 100
Value US$292
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.05
Quantity 8,656
Value US$26,401
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.12
Quantity 100
Value US$312
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
3.00
Quantity 16,411
Value US$49,233
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
2.98
Quantity 25,938
Value US$77,295
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
2.87
Quantity 1,578
Value US$4,529
ANDREA PFEIFER Officer Officer
Transaction date
Proposed sale
Price
2.96
Quantity 11,284
Value US$33,344
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-05-18 2026-05-15 S Sale
Pfeifer Andrea

Chief Executive Officer

Executive Director
86,897 +21.9%
368.81
US$2,810,208 		86,897 +21.9% 368.81 US$2,810,208
2026-05-15 2026-05-15 PrS Proposed sale
ANDREA M.A PFEIFER

Director; Officer

Executive Director
32,752
114.36
US$3,826,355 		32,752 114.36 US$3,826,355
2026-04-15 2026-04-15 PrS Proposed sale
ANDREA M.A PFEIFER

Officer

Officer
34,238
58.47
US$3,464,653 		34,238 58.47 US$3,464,653
2026-01-15 2026-01-15 PrS Proposed sale
ANDREA M.A PFEIFER

Officer

Officer
30,000
3.67
US$110,100 		30,000 3.67 US$110,100
2025-10-03 2025-10-03 PrS Proposed sale
ANDREA M.A PFEIFER

Officer

Officer
45,000
3.13
US$140,850 		45,000 3.13 US$140,850
2025-09-12 2025-09-12 PrS Proposed sale
ANDREA M.A PFEIFER

Officer

Officer
35,000
2.38
US$83,300 		35,000 2.38 US$83,300
2025-07-24 2025-07-24 PrS Proposed sale
ANDREA M.A PFEIFER

Officer

Officer
20,000
2.34
US$46,800 		20,000 2.34 US$46,800
2024-09-27 2024-09-27 PrS Proposed sale
ANDREA M. A PFEIFER

Officer

Officer
40,000
3.70
US$148,000 		40,000 3.70 US$148,000
2024-09-18 2024-09-18 PrS Proposed sale
ANDREA M. A PFEIFER

Officer

Officer
20,000
3.46
US$69,200 		20,000 3.46 US$69,200
2024-05-16 2024-05-16 PrS Proposed sale
AFFIRIS AG in Liqu

10% Stockholder

Large shareholder
150,000
3.33
US$499,500 		150,000 3.33 US$499,500
2023-12-28 2023-12-28 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
94,000
4.97
US$467,180 		94,000 4.97 US$467,180
2023-12-15 2023-12-15 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
95,000
3.71
US$352,450 		95,000 3.71 US$352,450
2023-12-11 2023-12-11 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
20,000
3.69
US$73,800 		20,000 3.69 US$73,800
2023-12-06 2023-12-06 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
20,000
3.50
US$70,000 		20,000 3.50 US$70,000
2023-08-22 2023-08-22 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
16,990
3.08
US$52,329 		16,990 3.08 US$52,329
2023-08-21 2023-08-21 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
1,509
3.05
US$4,602 		1,509 3.05 US$4,602
2023-08-17 2023-08-17 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
200
3.05
US$610 		200 3.05 US$610
2023-08-09 2023-08-09 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
1,567
3.11
US$4,873 		1,567 3.11 US$4,873
2023-08-08 2023-08-08 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
3,667
2.95
US$10,818 		3,667 2.95 US$10,818
2023-07-24 2023-07-24 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
200
3.05
US$610 		200 3.05 US$610
2023-07-21 2023-07-21 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
100
2.92
US$292 		100 2.92 US$292
2023-07-18 2023-07-18 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
8,656
3.05
US$26,401 		8,656 3.05 US$26,401
2023-07-13 2023-07-13 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
100
3.12
US$312 		100 3.12 US$312
2023-07-12 2023-07-12 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
16,411
3.00
US$49,233 		16,411 3.00 US$49,233
2023-07-10 2023-07-10 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
25,938
2.98
US$77,295 		25,938 2.98 US$77,295
2023-07-07 2023-07-07 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
1,578
2.87
US$4,529 		1,578 2.87 US$4,529
2023-07-03 2023-07-03 PrS Proposed sale
ANDREA PFEIFER

Officer

Officer
11,284
2.96
US$33,344 		11,284 2.96 US$33,344
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