SEC Form 4 · Updated Daily
SLP
— SIMULATIONS PLUS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| WOLTOSZ WALTER S | 10%+ Owner · Director | 3,202,131 | 2026-07-01 | S |
| WOLTOSZ VIRGINIA E | 10%+ Owner | 3,202,131 | 2026-07-01 | S |
| DiBella John Anthony II | Officer | 85,140 | 2026-08-03 | S |
| Fiedler-Kelly Jill | Officer | 77,817 | 2026-06-16 | S |
| Evans Sharlene | Director | 17,173 | 2026-05-01 | A |
| WEINER DANIEL L | Director | 16,547 | 2026-05-01 | A |
| Paglia John Kenneth | Director | 14,589 | 2026-05-01 | A |
| LaVange Lisa | Director | 9,968 | 2025-12-01 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-03 | DiBella John Anthony II | Open-market sale | 1,000 | $18.28 | 85,140 |
| 2026-07-06 | DiBella John Anthony II | Open-market sale | 1,000 | $18.36 | 86,140 |
| 2026-07-01 | WOLTOSZ VIRGINIA E | Open-market sale | 4,177 | $18.44 | 3,202,131 |
| 2026-07-01 | WOLTOSZ WALTER S | Open-market sale | 4,177 | $18.44 | 3,202,131 |
| 2026-06-16 | Fiedler-Kelly Jill | Option exercise (derivative) | 7,350 | $0.00 | 0 |
| 2026-06-16 | Fiedler-Kelly Jill | Open-market sale | 7,350 | $18.20 | 77,817 |
| 2026-06-16 | Fiedler-Kelly Jill | Option exercise | 7,350 | $10.05 | 85,167 |
| 2026-06-15 | Fiedler-Kelly Jill | Option exercise (derivative) | 1,050 | $0.00 | 7,350 |
| 2026-06-15 | Fiedler-Kelly Jill | Open-market sale | 1,050 | $16.51 | 77,817 |
| 2026-06-15 | Fiedler-Kelly Jill | Option exercise | 1,050 | $10.05 | 78,867 |
| 2026-06-03 | DiBella John Anthony II | Open-market sale | 1,000 | $16.50 | 87,140 |
| 2026-06-01 | WOLTOSZ VIRGINIA E | Open-market sale | 15,000 | $17.43 | 3,252,800 |
| 2026-06-01 | WOLTOSZ WALTER S | Open-market sale | 15,000 | $17.43 | 3,252,800 |
| 2026-05-11 | Fiedler-Kelly Jill | Option exercise (derivative) | 1,000 | $0.00 | 8,400 |
| 2026-05-11 | Fiedler-Kelly Jill | Open-market sale | 1,000 | $16.53 | 77,817 |
| 2026-05-11 | Fiedler-Kelly Jill | Option exercise | 1,000 | $10.05 | 78,817 |
| 2026-05-04 | WOLTOSZ VIRGINIA E | Open-market sale | 15,000 | $15.13 | 3,267,800 |
| 2026-05-04 | WOLTOSZ WALTER S | Open-market sale | 15,000 | $15.13 | 3,267,800 |
| 2026-05-04 | DiBella John Anthony II | Open-market sale | 1,000 | $14.98 | 88,140 |
| 2026-05-01 | Paglia John Kenneth | Grant / award | 2,117 | $0.00 | 14,589 |
| 2026-05-01 | WEINER DANIEL L | Grant / award | 2,117 | $0.00 | 16,547 |
| 2026-05-01 | WOLTOSZ WALTER S | Grant / award | 2,117 | $0.00 | 3,282,800 |
| 2026-05-01 | Evans Sharlene | Grant / award | 2,117 | $0.00 | 17,173 |
| 2026-04-15 | DiBella John Anthony II | Open-market sale | 1,000 | $13.37 | 89,140 |
| 2026-02-06 | DiBella John Anthony II | Option exercise (derivative) | 10,300 | $0.00 | 0 |
| 2026-02-06 | DiBella John Anthony II | Option exercise | 10,300 | $9.71 | 90,140 |
| 2026-01-30 | Paglia John Kenneth | Grant / award | 1,776 | $0.00 | 12,472 |
| 2026-01-30 | WEINER DANIEL L | Grant / award | 1,776 | $0.00 | 14,430 |
| 2026-01-30 | Evans Sharlene | Grant / award | 1,776 | $0.00 | 15,056 |
| 2026-01-30 | WOLTOSZ VIRGINIA E | Grant / award | 1,776 | $0.00 | 3,280,683 |
| 2026-01-30 | WOLTOSZ WALTER S | Grant / award | 1,776 | $0.00 | 3,280,683 |
| 2026-01-28 | Fiedler-Kelly Jill | Option exercise (derivative) | 8,950 | $0.00 | 0 |
| 2026-01-28 | Fiedler-Kelly Jill | Option exercise | 8,950 | $9.71 | 77,817 |
| 2025-12-18 | WOLTOSZ WALTER S | Gift | 9,095 | $0.00 | 3,278,907 |
| 2025-12-01 | LaVange Lisa | Open-market sale | 866 | $16.91 | 9,968 |
| 2025-11-03 | Evans Sharlene | Grant / award | 1,771 | $0.00 | 13,280 |
| 2025-11-03 | Paglia John Kenneth | Grant / award | 1,771 | $0.00 | 10,696 |
| 2025-11-03 | WEINER DANIEL L | Grant / award | 1,771 | $0.00 | 12,654 |
| 2025-11-03 | WOLTOSZ VIRGINIA E | Grant / award | 1,771 | $0.00 | 3,288,002 |
| 2025-11-03 | WOLTOSZ WALTER S | Grant / award | 1,771 | $0.00 | 3,288,002 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.