Arbutus Biopharma's three largest insider shareholders as of September 29, 2026 are Sciences Ltd. Roivant (TenPercentOwner, 38.85Mn shares), Michael J. Mcelhaugh (Interim President Ceo, 1.66Mn shares), Michael J. Sofia (Chief Scientific Officer, 1.49Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Sciences Ltd. Roivant | TenPercentOwner | 38,847,462 | 0 | 38,847,462 | 90.0% | 20 Oct, 2021 |
| 2 | Michael J. Mcelhaugh | Interim President Ceo | 1,658,003 | 0 | 1,658,003 | 3.8% | 19 Feb, 2025 |
| 3 | Michael J. Sofia | Chief Scientific Officer | 1,485,121 | 0 | 1,485,121 | 3.4% | 05 Feb, 2024 |
| 4 | David C Hastings | Chief Financial Officer | 249,824 | 0 | 249,824 | 0.6% | 19 Feb, 2025 |
| 5 | William H. Collier | President And Ceo | 216,500 | 0 | 216,500 | 0.5% | 03 Feb, 2023 |
| 6 | Tuan Nguyen | Chief Financial Officer | 159,963 | 0 | 159,963 | 0.4% | 23 Sep, 2026 |
| 7 | Karen Sims | Chief Medical Officer | 155,494 | 0 | 155,494 | 0.4% | 19 Feb, 2025 |
| 8 | J. Christopher Naftzger | General Counsel And Cco | 140,544 | 0 | 140,544 | 0.3% | 19 Feb, 2025 |
| 9 | Elizabeth Howard | Evp, Gc, Compliance | 86,024 | 0 | 86,024 | 0.2% | 03 Feb, 2023 |
| 10 | Lindsay Androski | President And Ceo | 72,337 | 0 | 72,337 | 0.2% | 23 Sep, 2026 |
| 11 | Keith S Manchester | Director | 46,069 | 0 | 46,069 | 0.1% | 16 Aug, 2024 |
| 12 | Robert A Beardsley | Director | 32,276 | 0 | 32,276 | 0.1% | 23 Sep, 2026 |
| 13 | Roger Sawhney | Director | 30,825 | 0 | 30,825 | 0.1% | 23 Sep, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sep, 2026 | Robert A Beardsley | Director | Acquired M | 52,533 | $3.20 | $168.11K | 52,533 | Direct |
| 18 Sep, 2026 | Tuan Nguyen | Chief Financial Officer | Acquired M | 265,625 | $3.49 | $927.03K | 339,125 | Direct |
| 18 Sep, 2026 | Lindsay Androski | President And Ceo | Acquired M | 116,408 | $3.20 | $372.51K | 144,408 | Direct |
| 18 Sep, 2026 | Roger Sawhney | Director | Acquired M | 52,533 | $3.34 | $175.46K | 52,533 | Direct |
| 18 Sep, 2026 | Lindsay Androski | President And Ceo | Acquired M | 10,456 | $4.39 | $45.90K | 154,864 | Direct |
| 18 Sep, 2026 | Robert A Beardsley | Director | Acquired M | 78,800 | $4.24 | $334.11K | 131,333 | Direct |
| 18 Sep, 2026 | Roger Sawhney | Director | Acquired M | 78,800 | $4.24 | $334.11K | 131,333 | Direct |
| 18 Sep, 2026 | Tuan Nguyen | Chief Financial Officer | Acquired M | 27,475 | $4.39 | $120.62K | 366,600 | Direct |
| 18 Sep, 2026 | Lindsay Androski | President And Ceo | Disposed F | 82,527 | $5.07 | $418.41K | 72,337 | Direct |
| 18 Sep, 2026 | Robert A Beardsley | Director | Disposed F | 99,057 | $5.07 | $502.22K | 32,276 | Direct |
| 18 Sep, 2026 | Tuan Nguyen | Chief Financial Officer | Disposed F | 206,637 | $5.07 | $1.05Mn | 159,963 | Direct |
| 18 Sep, 2026 | Roger Sawhney | Director | Disposed F | 100,508 | $5.07 | $509.58K | 30,825 | Direct |
| 18 Sep, 2026 | Robert A Beardsley | Director | Disposed M | 52,533 | $0.00 | $0 | 105,067 | Direct |
| 18 Sep, 2026 | Roger Sawhney | Director | Disposed M | 52,533 | $0.00 | $0 | 105,067 | Direct |
| 18 Sep, 2026 | Tuan Nguyen | Chief Financial Officer | Disposed M | 265,625 | $0.00 | $0 | 484,375 | Direct |
| 18 Sep, 2026 | Lindsay Androski | President And Ceo | Disposed M | 116,408 | $0.00 | $0 | 194,014 | Direct |
| 18 Sep, 2026 | Robert A Beardsley | Director | Disposed M | 78,800 | $0.00 | $0 | 0 | Direct |
| 18 Sep, 2026 | Roger Sawhney | Director | Disposed M | 78,800 | $0.00 | $0 | 0 | Direct |
| 18 Sep, 2026 | Lindsay Androski | President And Ceo | Disposed M | 10,456 | $0.00 | $0 | 61,244 | Direct |
| 18 Sep, 2026 | Tuan Nguyen | Chief Financial Officer | Disposed M | 27,475 | $0.00 | $0 | 160,925 | Direct |