Simulations Plus
Builds drug-development simulation software and consulting services for biopharma clients.
$18.40
After-hours close0.00 (0.00%)
At close$18.40(−0.11%)
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Breakdown13F · Form 4
Institutions 79.28%16.03M sharesInsiders 16.93%3.42M sharesOther 3.79%767.4K shares
Shares outstanding 20.22M · Float 16.81M · 83.1% free float
Institutions13F, as of Jun 30, 2026
170 holders · 16.03M shares · 35 new positions · 99 increased · 42 reduced · 25 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| First Light Asset Management, LLC | 2.79M | 13.81% | +159.9K | Aug 14, 2026 |
| BlackRock, Inc. | 1.50M | 7.43% | +249.7K | Aug 7, 2026 |
| First Eagle Investment Management, LLC | 1.07M | 5.29% | +328.5K | Aug 24, 2026 |
| Vanguard Capital Management LLC | 741.5K | 3.67% | +1.7K | Aug 13, 2026 |
| Kennedy Capital Management LLC | 539.1K | 2.67% | +149.8K | Aug 14, 2026 |
| Tributary Capital Management, LLC | 538.2K | 2.66% | −10.2K | Jul 23, 2026 |
| Geode Capital Management, LLC | 440.4K | 2.18% | +65.4K | Aug 12, 2026 |
| Marshall Wace, LLP | 410.5K | 2.03% | −222.1K | Aug 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| First Light Asset Management, LLC | 13.15% | 2.65M | 13G | Feb 6, 2026 ↗ |
| Conestoga Capital Advisors | 11.95% | 2.40M | 13G | Jan 10, 2025 ↗ |
| BlackRock, Inc. | 5.80% | 1.17M | 13G | Oct 2, 2025 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Walter S. Woltosz | director, 10 percent owner: | 3.20M | 15.83% | Jul 6, 2026 |
| John Anthony II DiBella | officer: Chief Revenue Officer | 85.1K | 0.42% | Aug 4, 2026 |
| Jill Fiedler-Kelly | officer: President, Services Solutions | 77.8K | 0.38% | Jun 17, 2026 |
| Sharlene Evans | director | 17.2K | 0.08% | May 1, 2026 |
| Daniel L. Weiner | director | 16.5K | 0.08% | May 1, 2026 |
| John Kenneth Paglia | director | 14.6K | 0.07% | May 1, 2026 |
| Lisa LaVange | director | 10.0K | 0.05% | Dec 2, 2025 |
8 people have not refiled in the last 18 months (4.41M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 3, 2026 | John Anthony II DiBellaofficer: Chief Revenue Officer | Sale | 1,000 | $18.28 | 85,140 |
| Jul 6, 2026 | John Anthony II DiBellaofficer: Chief Revenue Officer | Sale | 1,000 | $18.36 | 86,140 |
| Jul 1, 2026 | Walter S. Woltoszdirector, 10 percent owner: | Sale | 4,177 | $18.44 | 3,202,131 |
| Jun 16, 2026 | Jill Fiedler-Kellyofficer: President, Services Solutions | Sale | 7,350 | $18.20 | 77,817 |
| Jun 15, 2026 | Jill Fiedler-Kellyofficer: President, Services Solutions | Sale | 1,050 | $16.51 | 77,817 |
| Jun 3, 2026 | John Anthony II DiBellaofficer: Chief Revenue Officer | Sale | 1,000 | $16.50 | 87,140 |
| Jun 1, 2026 | Walter S. Woltoszdirector, 10 percent owner: | Sale | 15,000 | $17.43 | 3,252,800 |
| May 11, 2026 | Jill Fiedler-Kellyofficer: President, Services Solutions | Sale | 1,000 | $16.53 | 77,817 |
| May 4, 2026 | Walter S. Woltoszdirector, 10 percent owner: | Sale | 15,000 | $15.13 | 3,267,800 |
| May 4, 2026 | John Anthony II DiBellaofficer: Chief Revenue Officer | Sale | 1,000 | $14.98 | 88,140 |
CongressHouse and Senate disclosures
Not reported.