The most recent Milestone Pharmaceuticals (MIST) insider transaction: Michael John Tomsicek (Director) received 77,000 shares as a grant or award on Jun 10, 2026, reported on Form 4 on Jun 12, 2026. So far in the quarter ending Dec 31, 2026, insider holdings showed no net buying or selling.
Across the past 12 months, open-market trades by Milestone Pharmaceuticals insiders were all sales, totaling $859,739 (382.57K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Investments, Lp Rtw | TenPercentOwner | 0 | 7,571,204 | 7,571,204 | 86.3% | 24 Mar, 2023 |
| 2 | Joseph Oliveto | President And Ceo | 446,244 | 0 | 446,244 | 5.1% | 20 Apr, 2026 |
| 3 | Lorenz Muller | Chief Commercial Officer | 205,406 | 0 | 205,406 | 2.3% | 28 Jan, 2026 |
| 4 | David Bharucha | Chief Medical Officer | 113,181 | 0 | 113,181 | 1.3% | 28 Jan, 2026 |
| 5 | Joseph C Papa | Director | 100,000 | 0 | 100,000 | 1.1% | 15 Jul, 2025 |
| 6 | Amit Hasija | Cfo Evp Of Corp. Development | 99,848 | 0 | 99,848 | 1.1% | 28 Jan, 2026 |
| 7 | Paul F Truex | Director | 81,780 | 0 | 81,780 | 0.9% | 01 Jun, 2022 |
| 8 | Robert James Wills | Director | 65,000 | 0 | 65,000 | 0.7% | 15 Jul, 2025 |
| 9 | Jeffrey Edward Nelson | Chief Operating Officer | 49,848 | 0 | 49,848 | 0.6% | 28 Jan, 2026 |
| 10 | Debra K. Liebert | Director | 16,793 | 0 | 16,793 | 0.2% | 15 Jul, 2025 |
| 11 | Michael John Tomsicek | Director | 15,000 | 0 | 15,000 | 0.2% | 21 Oct, 2022 |
| 12 | Richard C Pasternak | Director | 10,000 | 0 | 10,000 | 0.1% | 21 Oct, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 10 Jun, 2026 | Michael John Tomsicek | Director | Acquired A | 77,000 | $0.00 | $0 | 77,000 | Direct |
| 10 Jun, 2026 | Joseph C Papa | Director | Acquired A | 77,000 | $0.00 | $0 | 77,000 | Direct |
| 10 Jun, 2026 | Lisa M. Giles | Director | Acquired A | 77,000 | $0.00 | $0 | 77,000 | Direct |
| 10 Jun, 2026 | Seth H. Z. Fischer | Director | Acquired A | 77,000 | $0.00 | $0 | 77,000 | Direct |
| 10 Jun, 2026 | Andrew Saik | Director | Acquired A | 77,000 | $0.00 | $0 | 77,000 | Direct |
| 10 Jun, 2026 | Robert James Wills | Director | Acquired A | 77,000 | $0.00 | $0 | 77,000 | Direct |
| 10 Jun, 2026 | Stuart Duty | Director | Acquired A | 77,000 | $0.00 | $0 | 77,000 | Direct |
| 16 Apr, 2026 | Joseph Oliveto | President And Ceo | Disposed S | 36,500 | $2.26 | $82.49K | 446,244 | Direct |
| 02 Feb, 2026 | Joseph Oliveto | President And Ceo | Acquired A | 679,000 | $0.00 | $0 | 679,000 | Direct |
| 02 Feb, 2026 | David Bharucha | Chief Medical Officer | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | Amit Hasija | Cfo Evp Of Corp. Development | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | Lorenz Muller | Chief Commercial Officer | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | Jeffrey Edward Nelson | Chief Operating Officer | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | Joseph Oliveto | President And Ceo | Acquired A | 679,000 | $0.00 | $0 | 679,000 | Direct |
| 02 Feb, 2026 | Amit Hasija | Cfo Evp Of Corp. Development | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | Lorenz Muller | Chief Commercial Officer | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | Jeffrey Edward Nelson | Chief Operating Officer | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | David Bharucha | Chief Medical Officer | Acquired A | 204,000 | $0.00 | $0 | 204,000 | Direct |
| 02 Feb, 2026 | Joseph Oliveto | President And Ceo | Acquired A | 453,000 | $0.00 | $0 | 453,000 | Direct |
| 02 Feb, 2026 | Jeffrey Edward Nelson | Chief Operating Officer | Acquired A | 136,000 | $0.00 | $0 | 136,000 | Direct |