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Simulations Plus, Inc.

SLP
Exchange
Nasdaq
Industry
Services-Computer Integrated Systems Design
SEC CIK
0001023459

In the last 90 days, Simulations Plus, Inc. insiders filed 0 open-market purchases and 3 sales; 169 institutions reported holding it in 13F filings for Q2 2026, worth $289.5M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Simulations Plus, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
3 filings
2 insiders, $113.7K in total
Insiders trading
2
Net value
−$113.7K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Simulations Plus, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Simulations Plus, Inc.
NameTitleLast reported holdingLast filingFilings, past year
DiBella John Anthony IIChief Revenue Officer85,140Aug 4, 20267
Woltosz Walter SDirector, 10% Owner3,202,131Jul 6, 20268
Woltosz Virginia E10% Owner3,202,131Jul 6, 20266
Fiedler-Kelly JillPresident, Services Solutions77,817Jun 17, 20265
Weiner Daniel LDirector16,547May 1, 20263
Paglia John KennethDirector14,589May 1, 20263
Evans SharleneDirector17,173May 1, 20263
LaVange LisaDirector9,968Dec 2, 20252
Oconnor ShawnChief Executive Officer–Oct 17, 20251
Frederick William WEVP/CFO2,100Oct 17, 20251
Szot DanielChief Revenue Officer–Oct 21, 20240
Chang StevenPresident, Immunetrics–Oct 24, 20230
Howell BrettBusiness Unit President–Oct 23, 20230
Ralph David L.Director12,797Nov 30, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 2, 2021 (view filing)1:24 PM ETJul 29-304 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$47.14−$942.7K−0.4%4.44M after2 lots
Aug 31, 2021 (view filing)3:20 PM ETAug 27-304 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−18.5K$44.78−$828.6K−0.4%4.42M after3 lots
Sep 1, 2021 (view filing)2:20 PM ETAug 311 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−1.50K$44.10−$66.0K0.0%4.42M after2 lots
Sep 29, 2021 (view filing)8:22 PM ETSep 281 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$38.54−$770.8K−0.5%4.40M after2 lots
Oct 29, 2021 (view filing)4:03 PM ETOct 272 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$45.32−$906.4K−0.5%4.38M after3 lots
Nov 30, 2021 (view filing)4:05 PM ETNov 26-294 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$48.40−$968.1K−0.5%4.36M after5 lots
Jan 3, 2022 (view filing)2:22 PM ETDec 29-30, 20215 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$48.74−$974.8K−0.5%4.26M after3 lots
Jan 26, 2022 (view filing)Jan 251 dayPaglia John KennethDirectorSSale−600$40.76−$24.5K−49.3%616 after
Jan 28, 2022 (view filing)5:27 PM ETJan 271 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$39.32−$786.5K−0.5%4.24M after2 lots
Feb 28, 2022 (view filing)7:01 PM ETFeb 24-254 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$37.99−$759.7K−0.5%4.22M after5 lots
Mar 31, 2022 (view filing)4:51 PM ETMar 29-302 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$48.75−$975.0K−0.5%4.20M after4 lots
Apr 29, 2022 (view filing)10:31 AM ETApr 27-282 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$46.89−$937.7K−0.5%4.18M after5 lots
Jun 1, 2022 (view filing)2:48 PM ETMay 275 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$47.99−$959.7K−0.5%4.16M after2 lots
Jun 30, 2022 (view filing)3:11 PM ETJun 28-292 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$48.07−$961.4K−0.5%4.14M after4 lots
Jul 29, 2022 (view filing)11:43 AM ETJul 272 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$61.19−$1.22M−0.5%4.12M after2 lots
Aug 31, 2022 (view filing)4:30 PM ETAug 29-302 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$61.41−$1.23M−0.5%4.10M after4 lots
Sep 29, 2022 (view filing)4:25 PM ETSep 281 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$49.55−$991.0K−0.5%4.08M after2 lots
Oct 31, 2022 (view filing)4:48 PM ETOct 274 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$41.64−$832.8K−0.5%4.09M after5 lots
Nov 29, 2022 (view filing)4:05 PM ETNov 281 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$39.89−$797.8K−0.5%4.07M after2 lots
Dec 29, 2022 (view filing)4:03 PM ETDec 281 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$36.15−$723.0K−0.5%3.96M after2 lots
Jan 31, 2023 (view filing)5:48 PM ETJan 27-304 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$39.71−$794.1K−0.5%3.94M after4 lots
Feb 27, 2023 (view filing)7:54 AM ETFeb 243 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$38.04−$760.8K−0.5%3.92M after2 lots
Mar 6, 2023 (view filing)Mar 2-34 daysDiBella John Anthony IIDivision PresidentSSale−28.8K$38.72−$1.11M−39.1%44.8K after3 lots
Mar 30, 2023 (view filing)4:23 PM ETMar 291 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$42.81−$856.2K−0.5%3.90M after2 lots10b5-1
Apr 27, 2023 (view filing)5:16 PM ETApr 261 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$41.52−$830.4K−0.5%3.88M after2 lots10b5-1
May 31, 2023 (view filing)4:28 PM ETMay 301 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$46.05−$921.1K−0.5%3.86M after2 lots10b5-1
Jun 30, 2023 (view filing)4:07 PM ETJun 28-292 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$43.03−$860.7K−0.5%3.84M after2 lots10b5-1
Jul 17, 2023 (view filing)Jul 134 daysPaglia John KennethDirectorSSale−1.20K$46.45−$55.7K−31.2%2.64K after
Jul 31, 2023 (view filing)Jul 274 daysLaVange LisaDirectorSSale−992$49.29−$48.9K−15.0%5.62K after
Nov 3, 2023 (view filing)4:04 PM ETNov 1-22 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−60.0K$34.39−$2.06M−1.6%3.78M after3 lots10b5-1
Nov 9, 2023 (view filing)Nov 81 dayPaglia John KennethDirectorSSale−1.00K$35.25−$35.3K−24.4%3.10K after10b5-1
Dec 5, 2023 (view filing)6:04 PM ETDec 1-54 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−60.0K$38.72−$2.32M−1.6%3.76M after4 lots10b5-1
Dec 26, 2023 (view filing)Dec 224 daysDiBella John Anthony IIBusiness Unit PresidentSSale−5.41K$45.16−$244.4K−6.3%79.8K afterAmended10b5-1
Jan 4, 2024 (view filing)Jan 4Same dayPaglia John KennethDirectorSSale−1.00K$43.74−$43.7K−32.3%2.10K after10b5-1
Jan 4, 2024 (view filing)6:36 PM ETJan 22 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$44.46−$889.2K−0.5%3.66M after2 lots10b5-1
Feb 5, 2024 (view filing)5:04 PM ETFeb 1-24 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$38.00−$759.9K−0.5%3.64M after3 lots10b5-1
Mar 5, 2024 (view filing)4:22 PM ETMar 14 daysWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$41.41−$828.2K−0.5%3.62M after2 lots10b5-1
Apr 2, 2024 (view filing)4:32 PM ETApr 11 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$39.94−$798.9K−0.6%3.60M after2 lots10b5-1
May 2, 2024 (view filing)4:37 PM ETMay 11 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$45.95−$919.0K−0.6%3.58M after2 lots10b5-1
May 8, 2024 (view filing)May 71 dayLaVange LisaDirectorSSale−650$48.30−$31.4K−7.6%7.87K after10b5-1
May 8, 2024 (view filing)May 71 dayWeiner Daniel LDirectorSSale−3.25K$48.31−$157.0K−27.1%8.76K after10b5-1
May 15, 2024 (view filing)May 141 dayWeiner Daniel LDirectorSSale−3.00K$50.13−$150.4K−27.9%7.76K after10b5-1
May 15, 2024 (view filing)May 141 dayLaVange LisaDirectorSSale−500$50.00−$25.0K−6.4%7.37K after10b5-1
Jun 4, 2024 (view filing)Jun 31 dayLaVange LisaDirectorSSale−650$48.26−$31.4K−8.8%6.72K after10b5-1
Jun 4, 2024 (view filing)5:04 PM ETJun 31 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$46.25−$925.0K−0.6%3.56M after2 lots10b5-1
Jul 1, 2024 (view filing)Jun 283 daysWeiner Daniel LDirectorSSale−750$49.32−$37.0K−9.7%7.01K after10b5-1
Jul 2, 2024 (view filing)4:10 PM ETJul 11 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$46.71−$934.2K−0.6%3.54M after3 lots10b5-1
Aug 2, 2024 (view filing)4:19 PM ETAug 11 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$39.63−$792.5K−0.6%3.52M after2 lots10b5-1
Sep 4, 2024 (view filing)Sep 31 dayLaVange LisaDirectorSSale−650$35.95−$23.4K−8.7%6.81K after10b5-1
Sep 4, 2024 (view filing)4:11 PM ETSep 31 dayWoltosz Walter S and 1 otherDirector, 10% OwnerSSale−20.0K$35.18−$703.7K−0.6%3.50M after2 lots10b5-1