VivoSim Labs's three largest insider shareholders as of September 09, 2026 are Keith Murphy (Executive Chairman, 26.05K shares), Douglas Jay Cohen (Director, 20.73K shares), Alison Tjosvold Milhous (Director, 19.90K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Keith Murphy | Executive Chairman | 26,053 | 0 | 26,053 | 23.3% | 29 Jan, 2026 |
| 2 | Douglas Jay Cohen | Director | 20,732 | 0 | 20,732 | 18.5% | 29 Jan, 2026 |
| 3 | Alison Tjosvold Milhous | Director | 19,899 | 0 | 19,899 | 17.8% | 29 Jan, 2026 |
| 4 | Adam K Stern | Director | 19,899 | 0 | 19,899 | 17.8% | 29 Jan, 2026 |
| 5 | David Gobel | Director | 15,000 | 0 | 15,000 | 13.4% | 29 Jan, 2026 |
| 6 | Tony Serge Lialin | Chief Commercial Officer | 10,000 | 0 | 10,000 | 8.9% | 01 Sep, 2026 |
| 7 | Vaidehi Joshi | Director | 245 | 0 | 245 | 0.2% | 09 Aug, 2024 |
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 |
|---|---|---|---|---|---|---|---|---|
| 31 Aug, 2026 | Tony Serge Lialin | Chief Commercial Officer | Acquired P | 10,000 | $0.28 | $2.80K | 10,000 | Direct |
| 27 Jan, 2026 | Alison Tjosvold Milhous | Director | Acquired A | 15,000 | $0.00 | $0 | 19,899 | Direct |
| 27 Jan, 2026 | Keith Murphy | Executive Chairman | Acquired A | 15,000 | $0.00 | $0 | 26,053 | Direct |
| 27 Jan, 2026 | Adam K Stern | Director | Acquired A | 15,000 | $0.00 | $0 | 19,899 | Direct |
| 27 Jan, 2026 | Douglas Jay Cohen | Director | Acquired A | 15,000 | $0.00 | $0 | 20,732 | Direct |
| 27 Jan, 2026 | David Gobel | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 25 Nov, 2025 | Amar Akhtar Sethi | Chief Scientific Officer | Acquired A | 53,500 | $0.00 | $0 | 53,500 | Direct |
| 17 Nov, 2025 | David Gobel | Director | Acquired S | 3,266 | $2.24 | $7.30K | 0 | Direct |
| 11 Aug, 2025 | Tony Serge Lialin | Chief Commercial Officer | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 07 Aug, 2024 | Adam K Stern | Director | Acquired A | 19,607 | $0.00 | $0 | 245 | Direct |
| 07 Aug, 2024 | Alison Tjosvold Milhous | Director | Acquired A | 19,607 | $0.00 | $0 | 245 | Direct |
| 07 Aug, 2024 | Vaidehi Joshi | Director | Acquired A | 19,607 | $0.00 | $0 | 245 | Direct |
| 07 Aug, 2024 | David Gobel | Director | Acquired A | 19,607 | $0.00 | $0 | 163 | Direct |
| 07 Aug, 2024 | Douglas Jay Cohen | Director | Acquired A | 19,607 | $0.00 | $0 | 287 | Direct |
| 07 Aug, 2024 | Keith Murphy | Executive Chairman | Acquired A | 19,607 | $0.00 | $0 | 553 | Direct |
| 05 Aug, 2024 | Keith Murphy | Executive Chairman | Acquired A | 574,923 | $0.00 | $0 | 2,395 | Direct |
| 05 Aug, 2024 | Keith Murphy | Executive Chairman | Acquired A | 143,731 | $0.00 | $0 | 599 | Direct |
| 15 Nov, 2023 | David Gobel | Director | Disposed S | 19,607 | $388.65 | $7.62Mn | 0 | Direct |
| 17 Nov, 2023 | Vaidehi Joshi | Director | Acquired A | 19,607 | $0.00 | $0 | 163 | Direct |
| 17 Nov, 2023 | Douglas Jay Cohen | Director | Acquired A | 19,607 | $0.00 | $0 | 205 | Direct |