Comparable stake leader
BVF INC/IL
SEC ownership of AC Immune SA
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001651625.
Disclosed value leader
BVF INC/IL
Comparable rows
0/50
Latest evidence
30 Jun 2026
- Public ticker
- ACIU on Nasdaq
- Parsed ownership sources
-
13F and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BVF INC/IL
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001651625
- Issuer location
- 1015 Lausanne, Switzerland
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of AC Immune SA (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BVF INC/IL
Disclosed value leader
BVF INC/IL
Comparable rows
0/50
Latest evidence
30 Jun 2026
13F
3/4/5
Highest disclosed value: $47,177,398
50 rows are not safely comparable across share classes.
Showing 1-8 of 50 holder rows.
Quick read
BVF INC/IL has the largest disclosed position value at $47.18M.
0 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BVF INC/IL's linked filing trail.
Disclosed position value
Top 5
BVF INC/IL
$47.18M
Andrea Pfeifer
$22.75M
WELLS FARGO & COMPANY/MN
$2.39M
RENAISSANCE TECHNOLOGIES LLC
$2M
MILLENNIUM MANAGEMENT LLC
$1.84M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BVF INC/IL |
13F
Company
|
—
class O/S missing
|
$47,177,398
19,822,436 shares
|
— | 30 Jun 2026 |
| Andrea Pfeifer |
3/4/5
Chief Executive Officer, Director
|
—
mixed-class rows
|
$22,747,154
7,678,576 shares
mixed-class rows
|
-$59,360 | 15 May 2026 |
| WELLS FARGO & COMPANY/MN |
13F
Company
|
—
class O/S missing
|
$2,389,618
1,004,041 shares
|
— | 30 Jun 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
—
class O/S missing
|
$1,999,502
840,127 shares
|
— | 30 Jun 2026 |
| MILLENNIUM MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$1,841,154
773,594 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
Company
|
—
class O/S missing
|
$1,235,873
519,274 shares
|
— | 30 Jun 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
—
class O/S missing
|
$812,145
340,082 shares
|
— | 30 Jun 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
Company
|
—
class O/S missing
|
$554,428
232,953 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$59,360.
Buys
$0
Insiders: 0
Sells
$59,360
Insiders: 1
Net
-$59,360
Shares: -20,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 20,000
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 20,000 | $0 | $59,360 | -$59,360 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-8 of 8 reporting-owner rows connected to AC Immune SA. Open a relationship link for the CIK-to-CIK filing trail.
Rows
8
Largest Forms 3/4/5 holder
Andrea Pfeifer
Net 12M change
-$59,360
Latest report
11 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Andrea Pfeifer | Chief Executive Officer, Director | $22,747,154 | -$59,360 | -0.26% | Mixed | 15 May 2026 |
| Christopher James Roberts | Chief Financial Officer | $393,116 | Mixed | 18 Mar 2026 | ||
| Piergiorgio Donati | Chief Operating Officer | $357,033 | Mixed | 20 Mar 2026 | ||
| Roy Ervin Twyman | Director | $254,529 | Mixed | 11 Jun 2026 | ||
| Monika Buetler | Director | $197,054 | Mixed | 11 Jun 2026 | ||
| Martin Zuegel | Interim CEO, Director | $196,372 | Mixed | 11 Jun 2026 | ||
| Carl Howard June | Director | $185,779 | Mixed | 11 Jun 2026 | ||
| Renee Aguiar-Lucander | Director | $140,624 | Mixed | 11 Jun 2026 |
Recent insider transactions for AC Immune SA
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Roy Ervin Twyman | ACIU | Common Share | Award | 21.8% | 16,568 | 92,556 | 11 Jun 2026 | Direct | ||
| Roy Ervin Twyman | ACIU | Share Option (right to buy) | Award | 38,889 | 38,889 | 11 Jun 2026 | Direct | |||
| Renee Aguiar-Lucander | ACIU | Common Share | Award | 47.9% | 16,568 | 51,136 | 11 Jun 2026 | Direct | ||
| Renee Aguiar-Lucander | ACIU | Share Option (right to buy) | Award | 38,889 | 38,889 | 11 Jun 2026 | Direct | |||
| Martin Zuegel | ACIU | Common Share | Award | 86.6% | 33,136 | 71,408 | 11 Jun 2026 | Direct | ||
| Martin Zuegel | ACIU | Share Option (right to buy) | Award | 77,778 | 77,778 | 11 Jun 2026 | Direct | |||
| Monika Buetler | ACIU | Common Share | Award | 32.9% | 17,751 | 71,656 | 11 Jun 2026 | Direct | ||
| Monika Buetler | ACIU | Share Option (right to buy) | Award | 41,667 | 41,667 | 11 Jun 2026 | Direct | |||
| Carl Howard June | ACIU | Common Share | Award | 32.5% | 16,568 | 67,556 | 11 Jun 2026 | Direct | ||
| Carl Howard June | ACIU | Share Option (right to buy) | Award | 38,889 | 38,889 | 11 Jun 2026 | Direct | |||
| Andrea Pfeifer | ACIU | Common Share | Sale | -0.26% | $27,935 | $2.79 | -10,000 | 3,820,288 | 15 May 2026 | Direct |
| Andrea Pfeifer | ACIU | Share | Sale | -0.26% | $31,425 | $3.14 | -10,000 | 3,830,288 | 15 Apr 2026 | Direct |
* marks a reported price that did not pass the local price check.