Simulations Plus's three largest insider shareholders as of April 22, 2026 are Walter S Woltosz (Director, 3.28Mn shares), Walter S Woltosz (Director, 3.28Mn shares), John Anthony Ii Dibella (Chief Revenue Officer, 89.14K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Walter S Woltosz | - | 3,280,683 | 0 | 02 Feb, 2026 |
| Walter S Woltosz | - | 3,280,683 | 0 | 02 Feb, 2026 |
| John Anthony Ii Dibella | Chief Revenue Officer | 89,140 | 0 | 16 Apr, 2026 |
| Jill Fiedler-Kelly | President, Services Solutions | 77,817 | 0 | 29 Jan, 2026 |
| Sharlene Evans | - | 15,056 | 0 | 02 Feb, 2026 |
| Daniel L Weiner | - | 14,430 | 0 | 02 Feb, 2026 |
| Daniel L Weiner | - | 14,430 | 0 | 02 Feb, 2026 |
| David L. Ralph | - | 12,797 | 0 | 03 Nov, 2021 |
| John Kenneth Paglia | - | 12,472 | 0 | 02 Feb, 2026 |
| Lisa Lavange | - | 9,968 | 0 | 02 Dec, 2025 |
| William W Frederick | Cfo | 2,100 | 0 | 27 Oct, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Apr, 2026 | John Anthony Ii Dibella | Common Stock | D | 1,000 | $13.37 | 89,140 | D | S |
| 06 Feb, 2026 | John Anthony Ii Dibella | Common Stock | A | 10,300 | $9.71 | 90,140 | D | M |
| 06 Feb, 2026 | John Anthony Ii Dibella | Stock Options (Right to Buy) | D | 10,300 | $0.00 | 0 | D | M |
| 30 Jan, 2026 | John Kenneth Paglia | Common Stock | A | 1,776 | $0.00 | 12,472 | D | A |
| 30 Jan, 2026 | Walter S Woltosz | Common Stock | A | 1,776 | $0.00 | 3,280,683 | D | A |
| 30 Jan, 2026 | Sharlene Evans | Common Stock | A | 1,776 | $0.00 | 15,056 | D | A |
| 30 Jan, 2026 | Daniel L Weiner | Common Stock | A | 1,776 | $0.00 | 14,430 | D | A |
| 28 Jan, 2026 | Jill Fiedler-Kelly | Common Stock | A | 8,950 | $9.71 | 77,817 | D | M |
| 28 Jan, 2026 | Jill Fiedler-Kelly | Employee Stock Option (Right to Buy) | D | 8,950 | $0.00 | 0 | D | M |
| 18 Dec, 2025 | Walter S Woltosz | Common Stock | D | 9,095 | $0.00 | 3,278,907 | D | G |
| 01 Dec, 2025 | Lisa Lavange | Common Stock | D | 866 | $16.91 | 9,968 | D | S |
| 03 Nov, 2025 | John Kenneth Paglia | Common Stock | A | 1,771 | $0.00 | 10,696 | D | A |
| 03 Nov, 2025 | Sharlene Evans | Common Stock | A | 1,771 | $0.00 | 13,280 | D | A |
| 03 Nov, 2025 | Lisa Lavange | Common Stock | A | 1,771 | $0.00 | 10,834 | D | A |
| 03 Nov, 2025 | Walter S Woltosz | Common Stock | A | 1,771 | $0.00 | 3,288,002 | D | A |
| 03 Nov, 2025 | Daniel L Weiner | Common Stock | A | 1,771 | $0.00 | 12,654 | D | A |
| 16 Oct, 2025 | Shawn Oconnor | Stock Options (Right to Buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 16 Oct, 2025 | William W Frederick | Stock Options (Right to Buy) | A | 32,500 | $0.00 | 32,500 | D | A |
| 16 Oct, 2025 | Jill Fiedler-Kelly | Stock Options (Right to Buy) | A | 27,500 | $0.00 | 27,500 | D | A |
| 16 Oct, 2025 | John Anthony Ii Dibella | Stock Options (Right to Buy) | A | 27,500 | $0.00 | 27,500 | D | A |