ACIU (AC Immune SA)
Insider Trading Activity
Every open-market purchase and sale reported by ACIU officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-15 | Martin Zuegel | Interim CEO | A | — | — |
| 2026-06-15 | Roy Ervin Twyman | Director | A | — | — |
| 2026-06-15 | Monika Buetler | Director | A | — | — |
| 2026-06-15 | RENEE AGUIAR-LUCANDER | Director | A | — | — |
| 2026-06-15 | Carl Howard June | Director | A | — | — |
| 2026-05-18 | Andrea Pfeifer | Chief Executive Officer | Sell | — | — |
| 2026-04-16 | Andrea Pfeifer | Chief Executive Officer | Buy | — | — |
| 2026-04-16 | Andrea Pfeifer | Chief Executive Officer | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Chief Executive Officer | 3,834,288 | — |
| — | Director | 92,556 | — |
| — | Director | 71,656 | — |
| — | Interim CEO | 71,408 | — |
| — | Director | 67,556 | — |
| — | Director | 51,136 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ACIU quote page; the site-wide leaderboard is on the insider transactions hub.