VIVS · Insider Trading
VivoSim Labs, Inc. Common Stock
Every open-market purchase and sale reported by VIVS 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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-01 | Tony Serge Lialin | Chief Commercial Officer | Buy | +10,000 | +$2.80K |
| 2026-01-29 | Alison Tjosvold Milhous | Director | A | +15,000 | — |
| 2026-01-29 | Adam K Stern | Director | A | +15,000 | — |
| 2026-01-29 | David Gobel | Director | A | +15,000 | — |
| 2026-01-29 | Douglas Jay Cohen | Director | A | +15,000 | — |
| 2026-01-29 | Keith Murphy | EXECUTIVE CHAIRMAN | A | +15,000 | — |
| 2025-11-26 | Amar Akhtar Sethi | Chief Scientific Officer | A | +53,500 deriv. | — |
| 2025-11-19 | David Gobel | Director | Sell | +3,266 | +$7.30K |
| 2025-08-21 | Tony Serge Lialin | Chief Commercial Officer | A | +40,000 deriv. | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Keith Murphy | EXECUTIVE CHAIRMAN | 26,053 | $3.96K |
| Douglas Jay Cohen | Director | 20,815 | $3.16K |
| Adam K Stern | Director | 19,899 | $3.02K |
| Alison Tjosvold Milhous | Director | 19,899 | $3.02K |
| David Gobel | Director | 15,000 | $2.28K |
| Tony Serge Lialin | Chief Commercial Officer | 10,000 | $1.52K |
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 VIVS quote page; the site-wide leaderboard is on the insider transactions hub.
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.