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Simulations Plus, Inc.

SLP Net selling
CIK 0001023459 #3339 in the set updated 18 Sep 2026
Bought (120 mo)
$1.40M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$77.77M
$22.62M on a plan · $1.90M straight out of an exercise
Sold at will
$53.25M
176 of 262 sales
Net
−$76.37M
−$51.85M against sales at will

By person

14 insiders · 286 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
WOLTOSZ WALTER S
Director
$1.40M (1)
$70.51M (172)
−$69.12M
8,124,458
$148.52M
−22.6%
DiBella John Anthony II
Chief Revenue Officer
—
$1.63M (10) scheduled
−$1.63M
85,140
$1.56M
+61.8%
Paglia John Kenneth
Director
—
$1.55M (8)
−$1.55M
14,589
$266.69K
—
Ralph David L.
Director
—
$1.04M (4)
−$1.04M
12,797
$233.93K
+240.6%
WEINER DANIEL L
Director
—
$811.47K (7)
−$811.47K
16,547
$302.48K
+1,007%
OCONNOR SHAWN
Chief Executive Officer
—
$669.89K (2)
−$669.89K
0
$0.00
—
Grasela Thaddeus Henry Jr
President
—
$430.72K (35)
−$430.72K
79,763
$1.46M
−81.4%
D ARGENIO DAVID Z
Former Director
—
$362.10K (8)
−$362.10K
33,608
$614.35K
−39.3%
LaVange Lisa
Director
—
$258.20K (10) scheduled
−$258.20K
9,968
$182.22K
+1,788%
WOLTOSZ VIRGINIA E
Secretary-Treasurer
—
$243.07K (1)
−$243.07K
5,703,416
$104.26M
−0.3%
Fiedler-Kelly Jill
President, Services Solutions
—
$167.64K (3) scheduled
−$167.64K
77,817
$1.42M
+17.7%
KNEISEL JOHN ROBERT
Former CFO
—
$90.84K (2)
−$90.84K
3,400
$62.15K
—
Evans Sharlene
Director
—
—
—
17,173
$313.92K
—
FREDERICK WILLIAM W
EVP/CFO
—
—
—
2,100
$38.39K
—

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Individual transactions

143
Insider
Date
Role
Action
Shares
Price
Amount
LaVange Lisa
27 Jul 2023
Director
Sell
992
$49.29
$48.90K
Paglia John Kenneth
13 Jul 2023
Director
Sell
1,200
$46.45
$55.74K
WOLTOSZ WALTER S
24 Feb 2023
Director
Sell
400
$38.91
$15.56K
WOLTOSZ WALTER S
24 Feb 2023
Director
Sell
19,600
$38.02
$745.19K
WOLTOSZ WALTER S
30 Jan 2023
Director
Sell
200
$40.11
$8.02K
WOLTOSZ WALTER S
30 Jan 2023
Director
Sell
2,058
$39.70
$81.70K
WOLTOSZ WALTER S
27 Jan 2023
Director
Sell
87
$40.19
$3.50K
WOLTOSZ WALTER S
27 Jan 2023
Director
Sell
17,655
$39.70
$700.90K
WOLTOSZ WALTER S
28 Dec 2022
Director
Sell
1,748
$36.66
$64.08K
WOLTOSZ WALTER S
28 Dec 2022
Director
Sell
18,252
$36.10
$658.90K
WOLTOSZ WALTER S
28 Nov 2022
Director
Sell
801
$40.86
$32.73K
WOLTOSZ WALTER S
28 Nov 2022
Director
Sell
19,199
$39.85
$765.08K
WOLTOSZ WALTER S
27 Oct 2022
Director
Sell
600
$44.34
$26.60K
WOLTOSZ WALTER S
27 Oct 2022
Director
Sell
2,586
$43.15
$111.59K
WOLTOSZ WALTER S
27 Oct 2022
Director
Sell
4,794
$42.53
$203.89K
WOLTOSZ WALTER S
27 Oct 2022
Director
Sell
4,966
$41.21
$204.65K
WOLTOSZ WALTER S
27 Oct 2022
Director
Sell
7,054
$40.55
$286.04K
WOLTOSZ WALTER S
28 Sep 2022
Director
Sell
13,246
$49.73
$658.72K
WOLTOSZ WALTER S
28 Sep 2022
Director
Sell
6,754
$49.19
$332.23K
WOLTOSZ WALTER S
30 Aug 2022
Director
Sell
1,879
$60.65
$113.96K
WOLTOSZ WALTER S
29 Aug 2022
Director
Sell
508
$62.38
$31.69K
WOLTOSZ WALTER S
29 Aug 2022
Director
Sell
11,203
$61.70
$691.23K
WOLTOSZ WALTER S
29 Aug 2022
Director
Sell
6,410
$61.06
$391.39K
WOLTOSZ WALTER S
27 Jul 2022
Director
Sell
8,105
$61.54
$498.78K
WOLTOSZ WALTER S
27 Jul 2022
Director
Sell
11,895
$60.95
$725.00K
WOLTOSZ WALTER S
29 Jun 2022
Director
Sell
576
$48.93
$28.18K
WOLTOSZ WALTER S
29 Jun 2022
Director
Sell
1,963
$48.42
$95.05K
WOLTOSZ WALTER S
28 Jun 2022
Director
Sell
300
$48.79
$14.64K
WOLTOSZ WALTER S
28 Jun 2022
Director
Sell
17,161
$47.99
$823.56K
WOLTOSZ WALTER S
27 May 2022
Director
Sell
12,384
$48.39
$599.26K
WOLTOSZ WALTER S
27 May 2022
Director
Sell
7,616
$47.33
$360.47K
WOLTOSZ WALTER S
28 Apr 2022
Director
Sell
2,458
$48.31
$118.75K
WOLTOSZ WALTER S
28 Apr 2022
Director
Sell
1,354
$47.50
$64.32K
WOLTOSZ WALTER S
28 Apr 2022
Director
Sell
2,900
$46.34
$134.39K
WOLTOSZ WALTER S
27 Apr 2022
Director
Sell
2,918
$47.35
$138.17K
WOLTOSZ WALTER S
27 Apr 2022
Director
Sell
10,370
$46.49
$482.10K
WOLTOSZ WALTER S
30 Mar 2022
Director
Sell
3,360
$49.62
$166.72K
WOLTOSZ WALTER S
30 Mar 2022
Director
Sell
1,500
$48.85
$73.28K
WOLTOSZ WALTER S
29 Mar 2022
Director
Sell
3,793
$48.77
$184.98K
WOLTOSZ WALTER S
29 Mar 2022
Director
Sell
11,347
$48.47
$549.99K
WOLTOSZ WALTER S
25 Feb 2022
Director
Sell
4,051
$38.93
$157.71K
WOLTOSZ WALTER S
25 Feb 2022
Director
Sell
1,616
$38.46
$62.15K
WOLTOSZ WALTER S
24 Feb 2022
Director
Sell
8,269
$38.37
$317.28K
WOLTOSZ WALTER S
24 Feb 2022
Director
Sell
3,056
$37.28
$113.93K
WOLTOSZ WALTER S
24 Feb 2022
Director
Sell
3,008
$36.13
$108.68K
WOLTOSZ WALTER S
27 Jan 2022
Director
Sell
665
$40.01
$26.61K
WOLTOSZ WALTER S
27 Jan 2022
Director
Sell
19,335
$39.30
$759.87K
Paglia John Kenneth
25 Jan 2022
Director
Sell
600
$40.76
$24.46K
WOLTOSZ WALTER S
30 Dec 2021
Director
Sell
7,167
$49.38
$353.91K
WOLTOSZ WALTER S
29 Dec 2021
Director
Sell
5,897
$48.56
$286.36K
WOLTOSZ WALTER S
29 Dec 2021
Director
Sell
6,936
$48.23
$334.52K
WOLTOSZ WALTER S
29 Nov 2021
Director
Sell
100
$48.70
$4.87K
WOLTOSZ WALTER S
29 Nov 2021
Director
Sell
7,568
$47.54
$359.78K
WOLTOSZ WALTER S
26 Nov 2021
Director
Sell
33
$50.17
$1.66K
WOLTOSZ WALTER S
26 Nov 2021
Director
Sell
3,894
$49.55
$192.95K
WOLTOSZ WALTER S
26 Nov 2021
Director
Sell
8,405
$48.64
$408.82K
WOLTOSZ WALTER S
27 Oct 2021
Director
Sell
3,015
$46.21
$139.32K
WOLTOSZ WALTER S
27 Oct 2021
Director
Sell
9,225
$45.77
$422.23K
WOLTOSZ WALTER S
27 Oct 2021
Director
Sell
7,760
$44.44
$344.85K
WOLTOSZ WALTER S
28 Sep 2021
Director
Sell
9,540
$38.78
$369.96K
WOLTOSZ WALTER S
28 Sep 2021
Director
Sell
10,460
$38.32
$400.83K
WOLTOSZ WALTER S
31 Aug 2021
Director
Sell
100
$44.59
$4.46K
WOLTOSZ WALTER S
31 Aug 2021
Director
Sell
1,397
$44.07
$61.57K
WOLTOSZ WALTER S
30 Aug 2021
Director
Sell
8,803
$44.90
$395.25K
WOLTOSZ WALTER S
27 Aug 2021
Director
Sell
4,048
$45.05
$182.36K
WOLTOSZ WALTER S
27 Aug 2021
Director
Sell
5,652
$44.40
$250.95K
WOLTOSZ WALTER S
30 Jul 2021
Director
Sell
7,545
$47.21
$356.20K
WOLTOSZ WALTER S
29 Jul 2021
Director
Sell
12,455
$47.09
$586.51K
WOLTOSZ WALTER S
25 Jun 2021
Director
Sell
8,121
$53.51
$434.55K
WOLTOSZ WALTER S
25 Jun 2021
Director
Sell
5,181
$52.53
$272.16K
WOLTOSZ WALTER S
24 Jun 2021
Director
Sell
2,098
$54.33
$113.98K
WOLTOSZ WALTER S
24 Jun 2021
Director
Sell
8,600
$53.42
$459.41K
WOLTOSZ WALTER S
25 May 2021
Director
Sell
311
$51.77
$16.10K
WOLTOSZ WALTER S
25 May 2021
Director
Sell
9,864
$51.06
$503.66K
WOLTOSZ WALTER S
24 May 2021
Director
Sell
1,654
$53.73
$88.87K
WOLTOSZ WALTER S
24 May 2021
Director
Sell
2,130
$52.92
$112.72K
WOLTOSZ WALTER S
24 May 2021
Director
Sell
10,041
$51.77
$519.82K
WOLTOSZ WALTER S
26 Apr 2021
Director
Sell
2,111
$69.50
$146.71K
WOLTOSZ WALTER S
26 Apr 2021
Director
Sell
13,532
$68.74
$930.19K
WOLTOSZ WALTER S
26 Apr 2021
Director
Sell
8,357
$67.96
$567.94K
WOLTOSZ WALTER S
25 Mar 2021
Director
Sell
24,000
$60.04
$1.44M
Ralph David L.
11 Feb 2021
Director
Sell
5,000
$84.34
$421.70K
WEINER DANIEL L
2 Feb 2021
Director
Sell
5,217
$80.90
$422.06K
Paglia John Kenneth
29 Jan 2021
Director
Sell
13,260
$79.25
$1.05M
LaVange Lisa
27 Jan 2021
Director
Sell
500
$78.74
$39.37K
DiBella John Anthony II
27 Jan 2021
Division President
Sell
2,360
$80.00
$188.80K
WOLTOSZ WALTER S
25 Jan 2021
Director
Sell
24,000
$76.43
$1.83M
Ralph David L.
20 Jan 2021
Director
Sell
3,750
$72.99
$273.71K
WOLTOSZ WALTER S
23 Dec 2020
Director
Sell
24,000
$72.71
$1.75M
OCONNOR SHAWN
30 Nov 2020
Chief Executive Officer
Sell
6,381
$56.50
$360.53K
Ralph David L.
30 Nov 2020
Director
Sell
5,000
$55.65
$278.24K
WOLTOSZ WALTER S
23 Nov 2020
Director
Sell
24,000
—
no price
OCONNOR SHAWN
23 Nov 2020
Chief Executive Officer
Sell
5,500
$56.25
$309.36K
WOLTOSZ WALTER S
27 Oct 2020
Director
Sell
24,000
$68.95
$1.65M
WOLTOSZ WALTER S
24 Sep 2020
Director
Sell
24,000
$66.08
$1.59M
WOLTOSZ WALTER S
27 Jul 2020
Director
Sell
24,000
$66.13
$1.59M
WOLTOSZ WALTER S
24 Jun 2020
Director
Sell
24,000
$55.82
$1.34M
WOLTOSZ WALTER S
22 May 2020
Director
Sell
24,000
$39.35
$944.40K
WOLTOSZ WALTER S
24 Apr 2020
Director
Sell
24,000
$41.25
$990.00K
KNEISEL JOHN ROBERT
17 Apr 2020
CFO
Sell
1,000
$38.07
$38.07K
WOLTOSZ WALTER S
25 Mar 2020
Director
Sell
24,000
$31.71
$761.04K
WOLTOSZ WALTER S
24 Feb 2020
Director
Sell
24,000
$36.69
$880.56K
WOLTOSZ WALTER S
27 Jan 2020
Director
Sell
24,000
$33.26
$798.24K
WOLTOSZ WALTER S
27 Dec 2019
Director
Sell
24,000
$34.25
$822.00K
WOLTOSZ WALTER S
22 Nov 2019
Director
Sell
24,000
$34.67
$832.08K
WOLTOSZ WALTER S
27 Oct 2019
Director
Sell
24,000
$33.45
$802.80K
WOLTOSZ WALTER S
24 Sep 2019
Director
Sell
24,000
$35.86
$860.64K
WOLTOSZ WALTER S
26 Aug 2019
Director
Sell
24,000
$36.22
$869.28K
Paglia John Kenneth
6 Aug 2019
Director
Sell
690
$37.86
$26.12K
WEINER DANIEL L
31 Jul 2019
Director
Sell
2,339
—
no price
Paglia John Kenneth
29 Jul 2019
Director
Sell
3,083
—
no price
WOLTOSZ WALTER S
28 May 2019
Director
Sell
18,500
$25.67
$474.90K
WOLTOSZ WALTER S
26 Apr 2019
Director
Sell
18,500
$22.11
$409.04K
Ralph David L.
12 Apr 2019
Director
Sell
3,000
$22.74
$68.22K
WOLTOSZ WALTER S
27 Mar 2019
Director
Sell
18,500
$20.64
$381.84K
WOLTOSZ WALTER S
26 Feb 2019
Director
Sell
18,500
$20.65
$382.03K
WOLTOSZ WALTER S
28 Jan 2019
Director
Sell
18,500
$18.66
$345.21K
WOLTOSZ WALTER S
29 Oct 2018
Director
Sell
18,500
$20.01
$370.19K
WOLTOSZ WALTER S
27 Sep 2018
Director
Sell
18,500
$19.92
$368.52K
WOLTOSZ WALTER S
27 Aug 2018
Chairman
Sell
18,500
$20.33
$376.11K
WOLTOSZ WALTER S
27 Jul 2018
Director
Sell
18,500
$17.76
$328.56K
WOLTOSZ WALTER S
29 May 2018
Chairman and CEO
Sell
18,500
$19.27
$356.50K
WOLTOSZ WALTER S
26 Apr 2018
Chairman and CEO
Sell
18,500
$17.20
$318.20K
KNEISEL JOHN ROBERT
20 Apr 2018
CFO
Sell
2,991
$17.64
$52.77K
WOLTOSZ WALTER S
27 Mar 2018
Chairman and CEO
Sell
18,500
$14.54
$268.99K
Grasela Thaddeus Henry Jr
9 Mar 2018
President
Sell
14,781
—
no price
Grasela Thaddeus Henry Jr
8 Mar 2018
President
Sell
15,061
—
no price
Grasela Thaddeus Henry Jr
7 Mar 2018
President
Sell
6,940
—
no price
Grasela Thaddeus Henry Jr
6 Mar 2018
President
Sell
3,488
—
no price
Grasela Thaddeus Henry Jr
5 Mar 2018
President
Sell
8,193
—
no price
Grasela Thaddeus Henry Jr
2 Mar 2018
President
Sell
9,066
—
no price
Grasela Thaddeus Henry Jr
1 Mar 2018
President
Sell
10,658
—
no price
Grasela Thaddeus Henry Jr
28 Feb 2018
President
Sell
7,077
—
no price
WOLTOSZ WALTER S
27 Feb 2018
Chairman and CEO
Sell
18,500
$16.13
$298.50K
Grasela Thaddeus Henry Jr
27 Feb 2018
President
Sell
14,853
—
no price
Grasela Thaddeus Henry Jr
26 Feb 2018
President
Sell
6,000
—
no price
Grasela Thaddeus Henry Jr
23 Feb 2018
President
Sell
3,883
—
no price
WOLTOSZ WALTER S
27 Dec 2017
Chairman and CEO
Sell
18,500
$16.25
$300.63K
WOLTOSZ WALTER S
29 Nov 2017
CEO
Sell
18,500
$15.78
$291.93K
WOLTOSZ WALTER S
28 Oct 2017
CO
Sell
18,500
$16.37
$302.85K
WOLTOSZ WALTER S
27 Sep 2017
CO
Sell
18,500
$15.45
$285.83K
Grasela Thaddeus Henry Jr
10 Aug 2017
President
Sell
31,515
—
no price
Grasela Thaddeus Henry Jr
9 Aug 2017
President
Sell
8,134
—
no price
Showing 250 of 286 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 398
Amendments (4/A) skipped 7
Filings about a different issuer 0
Unreadable filings 0
Joint filings 119
Sales on a Rule 10b5-1 plan 77
Sales straight out of an exercise 9
Sales at will 176
Transactions with no price 33
Shares from compensation/vesting 1,211,742
Sales filed before the plan box existed 174
History held since 2 Sep 2016