Simulations Plus, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Simulations Plus, Inc. (SLP), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are SLP insiders buying or selling?
In the last 12 months, Simulations Plus, Inc. insiders reported 0 open-market purchases ($0) and 12 sales ($829.2K) — net selling of $829.2K. Since February 2018, Trabud has recorded 138 Form 4 filings for SLP: 4 buys ($2.7M) and 134 sells ($78.5M).
Source: SEC EDGAR Form 4
Key Statistics (February 2018 – Aug 4, 2026)
Total Form 4 filings
138
SEC EDGAR
Insider filers
10
Insider buys (4)
$2.7M
Insider sells (134)
$78.5M
Insider sentiment
Net sellingNet insider flow of $75.7M in net selling since February 2018, and $829.2K in net selling over the last 12 months.
Recent SLP insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Aug 4, 2026 | John Anthony Dibella II | Chief Revenue Officer | Sale | 1.0K | $18.28 | $18.3K | SEC ↗ |
| Jul 8, 2026 | John Anthony Dibella II | Chief Revenue Officer | Sale | 1.0K | $18.36 | $18.4K | SEC ↗ |
| Jul 6, 2026 | Walter S Woltosz | Director, 10% Owner | Sale | 4.2K | $18.44 | $77.0K | SEC ↗ |
| Jun 17, 2026 | Jill Fiedler-Kelly | President, Services Solutions | Sale | 7.3K | $18.20 | $133.8K | SEC ↗ |
| Jun 16, 2026 | Jill Fiedler-Kelly | President, Services Solutions | Sale | 1.1K | $16.51 | $17.3K | SEC ↗ |
| Jun 4, 2026 | John Anthony Dibella II | Chief Revenue Officer | Sale | 1.0K | $16.50 | $16.5K | SEC ↗ |
| Jun 2, 2026 | Walter S Woltosz | Director, 10% Owner | Sale | 15.0K | $17.43 | $261.4K | SEC ↗ |
| May 13, 2026 | Jill Fiedler-Kelly | President, Services Solutions | Sale | 1.0K | $16.53 | $16.5K | SEC ↗ |
| May 5, 2026 | John Anthony Dibella II | Chief Revenue Officer | Sale | 1.0K | $14.98 | $15.0K | SEC ↗ |
| May 5, 2026 | Walter S Woltosz | Director, 10% Owner | Sale | 15.0K | $15.13 | $226.9K | SEC ↗ |
| Apr 16, 2026 | John Anthony Dibella II | Chief Revenue Officer | Sale | 1.0K | $13.37 | $13.4K | SEC ↗ |
| Dec 2, 2025 | Lisa Lavange | Director | Sale | 866 | $16.91 | $14.6K | SEC ↗ |
| Oct 3, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $15.39 | $307.8K | SEC ↗ |
| Sep 4, 2025 | Lisa Lavange | Director | Sale | 867 | $14.10 | $12.2K | SEC ↗ |
| Aug 4, 2025 | Lisa Lavange | Director | Sale | 867 | $12.93 | $11.2K | SEC ↗ |
| Jul 2, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $18.33 | $366.6K | SEC ↗ |
| Jun 3, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $27.15 | $543.1K | SEC ↗ |
| May 1, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $33.51 | $670.2K | SEC ↗ |
| Apr 2, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $24.09 | $481.8K | SEC ↗ |
| Mar 4, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $28.68 | $573.6K | SEC ↗ |
| Feb 4, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $33.91 | $678.2K | SEC ↗ |
| Jan 3, 2025 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $27.88 | $557.7K | SEC ↗ |
| Dec 30, 2024 | Daniel L Weiner | Director | Sale | 750 | $28.50 | $21.4K | SEC ↗ |
| Dec 3, 2024 | Walter S Woltosz | Director, 10% Owner | Sale | 20.0K | $31.76 | $635.2K | SEC ↗ |
| Dec 3, 2024 | Lisa Lavange | Director | Sale | 650 | $31.88 | $20.7K | SEC ↗ |
Showing the 25 most recent of 138 Form 4 filings for Simulations Plus, Inc..
Most active SLP insiders
- Walter S Woltosz88 filings
- Lisa Lavange10 filings
- John Anthony Dibella II9 filings
- Daniel L Weiner7 filings
- John Kenneth Paglia7 filings
Ask anything about SLP insider activity
Use Trabud's AI agent to query Simulations Plus, Inc.'s Form 4 history in plain English — "Show me SLP CEO purchases this year" or compare it against any other ticker.
Open the AI agentSLP insider trading FAQ
Are Simulations Plus, Inc. insiders buying or selling?
In the last 12 months, Simulations Plus, Inc. insiders reported 0 open-market purchases ($0) and 12 sales ($829.2K) — net selling of $829.2K. Since February 2018, Trabud has recorded 138 Form 4 filings for SLP: 4 buys ($2.7M) and 134 sells ($78.5M). Over the full record that is net selling of $75.7M.
How many insiders trade SLP stock?
10 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Simulations Plus, Inc.. The most recent filing was accepted on Aug 4, 2026.
Where does Trabud get SLP insider trading data?
All SLP insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.