Walter S. Woltosz is Director & 10% Owner at Simulations Plus, Inc. (SLP). They have made 30 open-market trades across 1 company since 2016, most recently 2026-07-01.
CIK 0001222526
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 30 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SLP | 3,202,131 | $59.2M |
Shares reported on the most recent Form 4, priced at the 2026-07-06 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 46% | 42% | 46% |
| Avg Move | +0.2% | +2.0% | +2.1% |
| Scored | 26 | 26 | 26 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SLP | SELL · 10b5-1 | 2026-07-01 | 2026-07-06 | $18.44 | $77K | -0.9% | -0.4% | +0.6% |
| SLP | SELL · 10b5-1 | 2026-06-01 | 2026-06-02 | $17.43 | $261K | +1.9% | +15.2% | +15.2% |
| SLP | SELL · 10b5-1 | 2026-05-04 | 2026-05-05 | $15.13 | $227K | -20.2% | -0.5% | +9.4% |
| SLP | SELL · 10b5-1 | 2025-07-01 | 2025-07-02 | $18.33 | $733K | -28.9% | -29.9% | -17.4% |
| SLP | SELL · 10b5-1 | 2025-04-01 | 2025-04-02 | $24.09 | $482K | +43.8% | +40.2% | -22.9% |
| SLP | SELL · 10b5-1 | 2025-02-03 | 2025-02-04 | $33.91 | $1.4M | +2.6% | -20.2% | -5.3% |
| SLP | SELL · 10b5-1 | 2024-10-01 | 2024-10-02 | $31.26 | $625K | +3.8% | -9.1% | -8.7% |
| SLP | SELL · 10b5-1 | 2024-09-03 | 2024-09-04 | $35.18 | $1.4M | -7.8% | -13.0% | -9.8% |
| SLP | SELL · 10b5-1 | 2024-08-01 | 2024-08-02 | $39.63 | $793K | +1.7% | -1.8% | -22.9% |
| SLP | SELL · 10b5-1 | 2024-07-01 | 2024-07-02 | $46.69 | $1.8M | -0.7% | -6.7% | -25.3% |
| SLP | SELL · 10b5-1 | 2024-05-01 | 2024-05-02 | $45.95 | $1.8M | +5.2% | -2.1% | -13.1% |
| SLP | SELL · 10b5-1 | 2024-03-01 | 2024-03-05 | $41.41 | $828K | -0.4% | +9.9% | +6.3% |
| SLP | SELL · 10b5-1 | 2023-12-01 | 2023-12-05 | $38.72 | $4.6M | +7.0% | +4.5% | +6.5% |
| SLP | SELL · 10b5-1 | 2023-06-28 | 2023-06-30 | $43.03 | $1.7M | +8.5% | +15.1% | -5.1% |
| SLP | SELL · 10b5-1 | 2023-04-26 | 2023-04-27 | $41.52 | $1.7M | +0.8% | +12.4% | +18.8% |
| SLP | SELL | 2023-01-27 | 2023-01-31 | $39.70 | $1.6M | -4.3% | -6.0% | +1.6% |
| SLP | SELL | 2022-12-28 | 2022-12-29 | $36.15 | $1.4M | +6.4% | +7.8% | +15.4% |
| SLP | SELL | 2022-08-29 | 2022-08-31 | $61.40 | $2.4M | -3.1% | -18.0% | -32.6% |
| SLP | SELL | 2022-07-27 | 2022-07-29 | $61.19 | $2.4M | -1.9% | -4.3% | -36.6% |
| SLP | SELL | 2022-06-28 | 2022-06-30 | $48.05 | $1.9M | +11.6% | +31.7% | +0.8% |
| SLP | SELL | 2022-05-27 | 2022-06-01 | $47.99 | $1.9M | -9.6% | +4.6% | +26.8% |
| SLP | SELL | 2022-04-27 | 2022-04-29 | $46.91 | $1.7M | -12.9% | +2.0% | +36.9% |
| SLP | SELL | 2022-02-24 | 2022-02-28 | $37.99 | $1.5M | +7.3% | +27.0% | +21.3% |
| SLP | SELL | 2021-10-27 | 2021-10-29 | $45.32 | $1.8M | +9.6% | -5.6% | -22.3% |
| SLP | SELL | 2021-08-27 | 2021-08-31 | $44.78 | $1.7M | -0.4% | -10.8% | +6.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.