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Are Simulations Plus Insiders Buying or Selling?
Simulations Plus (SLP) has had 1 insider transaction in the past 90 days, all sells. The most recent was DiBella John Anthony II, who sold 1,000 shares at $18.28 on August 3, 2026.
Insider trading patterns can signal confidence or concern from the people who know the company best. AltIndex tracks insider transactions as one of 25+ alternative data signals in the SLP AI Score. For government officials trading this stock, see SLP congressional trading.
Who’s Trading Simulations Plus Stock?
| Insider | Activity | Trades | Last Trade |
|---|---|---|---|
| WALTER WOLTOSZ | Sold $5.9M | 22 | Jul 1, 2026 |
| Jill Fiedler-Kelly | Sold $170,000 | 3 | Jun 16, 2026 |
| DiBella John Anthony II | Sold $81,000 | 5 | Aug 3, 2026 |
| Lisa LaVange | Sold $59,000 | 4 | Dec 1, 2025 |
| DANIEL WEINER | Sold $21,000 | 1 | Dec 27, 2024 |
Recent Simulations Plus Insider Transactions
| Insider | Transaction Date | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| DiBella John Anthony II | Aug 3, 2026 | Sell | 1,000 | $18.28 | $18,000 |
| DiBella John Anthony II | Jul 6, 2026 | Sell | 1,000 | $18.36 | $18,000 |
| WALTER WOLTOSZ | Jul 1, 2026 | Sell | 4,177 | $18.44 | $77,000 |
| Jill Fiedler-Kelly | Jun 16, 2026 | Sell | 7,350 | $18.2 | $130,000 |
| Jill Fiedler-Kelly | Jun 15, 2026 | Sell | 1,050 | $16.51 | $17,000 |
| DiBella John Anthony II | Jun 3, 2026 | Sell | 1,000 | $16.5 | $17,000 |
| WALTER WOLTOSZ | Jun 1, 2026 | Sell | 15,000 | $17.43 | $260,000 |
| Jill Fiedler-Kelly | May 11, 2026 | Sell | 1,000 | $16.53 | $17,000 |
| WALTER WOLTOSZ | May 4, 2026 | Sell | 15,000 | $15.13 | $230,000 |
| DiBella John Anthony II | May 4, 2026 | Sell | 1,000 | $14.98 | $15,000 |
| DiBella John Anthony II | Apr 15, 2026 | Sell | 1,000 | $13.37 | $13,000 |
| Lisa LaVange | Dec 1, 2025 | Sell | 866 | $16.91 | $15,000 |
| WALTER WOLTOSZ | Oct 1, 2025 | Sell | 20,000 | $15.39 | $310,000 |
| Lisa LaVange | Sep 2, 2025 | Sell | 867 | $14.1 | $12,000 |
| Lisa LaVange | Aug 1, 2025 | Sell | 867 | $12.93 | $11,000 |
| WALTER WOLTOSZ | Jul 1, 2025 | Sell | 12,224 | $18.58 | $230,000 |
| WALTER WOLTOSZ | Jul 1, 2025 | Sell | 7,776 | $17.94 | $140,000 |
| WALTER WOLTOSZ | Jun 2, 2025 | Sell | 15,500 | $26.72 | $410,000 |
| WALTER WOLTOSZ | Jun 2, 2025 | Sell | 2,700 | $27.71 | $75,000 |
| WALTER WOLTOSZ | Jun 2, 2025 | Sell | 1,000 | $30.57 | $31,000 |
| WALTER WOLTOSZ | Jun 2, 2025 | Sell | 700 | $29.13 | $20,000 |
| WALTER WOLTOSZ | Jun 2, 2025 | Sell | 100 | $31.36 | $3,100 |
| WALTER WOLTOSZ | May 1, 2025 | Sell | 10,604 | $33.78 | $360,000 |
| WALTER WOLTOSZ | May 1, 2025 | Sell | 9,396 | $33.2 | $310,000 |
| WALTER WOLTOSZ | Apr 1, 2025 | Sell | 17,400 | $24.01 | $420,000 |
| WALTER WOLTOSZ | Apr 1, 2025 | Sell | 2,600 | $24.62 | $64,000 |
| WALTER WOLTOSZ | Mar 3, 2025 | Sell | 20,000 | $28.68 | $570,000 |
| WALTER WOLTOSZ | Feb 3, 2025 | Sell | 14,421 | $34.06 | $490,000 |
| WALTER WOLTOSZ | Feb 3, 2025 | Sell | 5,579 | $33.53 | $190,000 |
| WALTER WOLTOSZ | Jan 2, 2025 | Sell | 19,900 | $27.88 | $550,000 |
| WALTER WOLTOSZ | Jan 2, 2025 | Sell | 100 | $28.5 | $2,900 |
| DANIEL WEINER | Dec 27, 2024 | Sell | 750 | $28.5 | $21,000 |
| WALTER WOLTOSZ | Dec 2, 2024 | Sell | 20,000 | $31.76 | $640,000 |
| Lisa LaVange | Dec 2, 2024 | Sell | 650 | $31.88 | $21,000 |
| WALTER WOLTOSZ | Nov 1, 2024 | Sell | 20,000 | $27.66 | $550,000 |
Frequently Asked Questions: Simulations Plus Insider Trading
In the past 90 days, Simulations Plus insiders have made 0 buys and 1 sell. The net selling may indicate insiders are taking profits or reducing exposure.
The most recent sale was by DiBella John Anthony II who sold 1,000 shares on August 3, 2026. View all transactions in the table on this page.
Insider buying is generally a stronger signal than insider selling, since insiders may sell for personal reasons (diversification, taxes) but typically buy only when they believe the stock is undervalued. AltIndex uses insider transaction patterns alongside 25+ other signals in the AI Score.
WOLTOSZ WALTER S has sold the most SLP stock in the last 2 years, with a total value of $5.9M.
The total value of insider transactions for Simulations Plus in the last 2 years is negative, amounting to -$6.3M. This suggests that insiders have predominantly sold shares, which could reflect various personal or financial considerations rather than a straightforward outlook on the company's future performance.
