Simulations Plus, Inc. (SLP) Insider Ownership

Historic Insider Ownership Trends

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).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
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