Over the 90-day window ending February 19, 2026, Simulations Plus's three dominant insider ownership positions are held by Director Walter S Woltosz (3.28Mn shares), Chief Revenue Officer John Anthony Ii Dibella (90.14K shares), President And Services Solutions Jill Fiedler-Kelly (77.82K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Walter S Woltosz | 3,280,683 | 02 Feb, 2026 | |
| John Anthony Ii Dibella | Chief Revenue Officer | 90,140 | 09 Feb, 2026 |
| Jill Fiedler-Kelly | President And Services Solutions | 77,817 | 29 Jan, 2026 |
| Sharlene Evans | 15,056 | 02 Feb, 2026 | |
| Daniel L Weiner | 14,430 | 02 Feb, 2026 | |
| David L. Ralph | 12,797 | 03 Nov, 2021 | |
| John Kenneth Paglia | 12,472 | 02 Feb, 2026 | |
| Lisa Lavange | 9,968 | 02 Dec, 2025 | |
| William W Frederick | Cfo | 2,100 | 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 |
|---|---|---|---|---|---|---|---|---|
| 06 Feb, 2026 | John Anthony Ii Dibella | Common Stock | A | 10,300 | $9.71 | 90,140 | D | M |
| 30 Jan, 2026 | Daniel L Weiner | Common Stock | A | 1,776 | $0.00 | 14,430 | D | A |
| 30 Jan, 2026 | Walter S Woltosz | Common Stock | A | 1,776 | $0.00 | 3,280,683 | D | A |
| 30 Jan, 2026 | John Kenneth Paglia | Common Stock | A | 1,776 | $0.00 | 12,472 | D | A |
| 30 Jan, 2026 | Sharlene Evans | Common Stock | A | 1,776 | $0.00 | 15,056 | D | A |
| 28 Jan, 2026 | Jill Fiedler-Kelly | Common Stock | A | 8,950 | $9.71 | 77,817 | 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 |
| 01 Dec, 2025 | Lisa Lavange | - | - | 9,968 | D | |||
| 03 Nov, 2025 | Daniel L Weiner | Common Stock | A | 1,771 | $0.00 | 12,654 | D | A |
| 03 Nov, 2025 | Walter S Woltosz | Common Stock | A | 1,771 | $0.00 | 3,288,002 | D | A |
| 03 Nov, 2025 | John Kenneth Paglia | Common Stock | A | 1,771 | $0.00 | 10,696 | D | A |
| 03 Nov, 2025 | Lisa Lavange | Common Stock | A | 1,771 | $0.00 | 10,834 | D | A |
| 03 Nov, 2025 | Sharlene Evans | Common Stock | A | 1,771 | $0.00 | 13,280 | D | A |
| 01 Oct, 2025 | Walter S Woltosz | Common Stock | D | 20,000 | $15.39 | 3,286,231 | D | S |
| 02 Sep, 2025 | Lisa Lavange | Common Stock | D | 867 | $14.10 | 9,063 | D | S |
| 01 Aug, 2025 | Daniel L Weiner | Common Stock | A | 2,074 | $0.00 | 10,883 | D | A |
| 01 Aug, 2025 | Walter S Woltosz | Common Stock | A | 2,074 | $0.00 | 3,306,231 | D | A |
| 01 Aug, 2025 | John Kenneth Paglia | Common Stock | A | 2,074 | $0.00 | 8,925 | D | A |
| 01 Aug, 2025 | Lisa Lavange | Common Stock | A | 2,074 | $0.00 | 10,797 | D | A |