Simulations Plus, Inc. (SLP)

Data as of Oct 6, 2026, from SEC Form 4 filings.

Net insider selling (90d)Watch SLP

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Latest SLP insider trades

John Anthony Dibella II - Officer
Open-market sale$18K
Aug 3, 2026
John Anthony Dibella II - Officer
Open-market sale

About Simulations Plus, Inc. (SLP)

Simulations Plus, Inc. files with the SEC under CIK 0001023459 and is classified as computer integrated systems design. We track it alongside the rest of the Information Technology sector.

Sector: Information Technology

SEC filings for SLP on EDGAR

SLP Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Open-market sale	1	1,000	$18K
Derivative transaction	40	4,101,192

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

SLP insider transactions (Form 4)

69 Form 4 filings on record, the earliest from Oct 1, 2024, newest first. Filing history page 1 of 3.

Date	Insider	Transaction	Security	Shares	Price	Value
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Common Stock	85,140^{footnote F1,F2}	$18.50	$1.58M
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	27,500^{footnote F3}	-^{footnote F3}	-
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	26,206^{footnote F3}	-^{footnote F3}	-
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	9,300^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	113,300^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	15,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	15,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	2,589^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	John Anthony Dibella II - Officer	Derivative	Stock Options (Right to Buy)	7,500^{footnote F3}	-^{footnote F4}	-
Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR Footnote F3 (price, shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.
Oct 6, 2026	Sharlene Evans - Director	Derivative	Common Stock	17,173^{footnote F1,F2}	$18.50	$318K
Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically converted into the right… Full note on SEC EDGAR
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Common Stock	77,817^{footnote F1,F2}	$18.50	$1.44M
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	27,500^{footnote F3}	-^{footnote F3}	-
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	15,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	15,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	7,500^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	7,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	5,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	9,300^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	Jill Fiedler-Kelly - Officer	Derivative	Stock Options (Right to Buy)	5,000^{footnote F3}	-^{footnote F4}	-
Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR Footnote F3 (price, shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.
Oct 6, 2026	William W. Frederick - Officer	Derivative	Common Stock	2,100^{footnote F1,F2}	$18.50	$39K
Oct 6, 2026	William W. Frederick - Officer	Derivative	Stock Options (Right to Buy)	32,500^{footnote F3}	-^{footnote F3}	-
Oct 6, 2026	William W. Frederick - Officer	Derivative	Stock Options (Right to Buy)	20,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	William W. Frederick - Officer	Derivative	Stock Options (Right to Buy)	20,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	William W. Frederick - Officer	Derivative	Stock Options (Right to Buy)	25,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	William W. Frederick - Officer	Derivative	Stock Options (Right to Buy)	10,000^{footnote F3}	-^{footnote F4}	-
Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR Footnote F3 (price, shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested and was canceled and… Full note on SEC EDGAR Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.
Oct 6, 2026	John Kenneth Paglia - Director	Derivative	Common Stock	14,589^{footnote F1,F2}	$18.50	$270K
Oct 6, 2026	John Kenneth Paglia - Director	Derivative	Stock Options (Right to Buy)	6,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	John Kenneth Paglia - Director	Derivative	Stock Options (Right to Buy)	5,000^{footnote F3}	-^{footnote F4}	-
Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR Footnote F3 (shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.
Oct 6, 2026	Daniel L. Weiner - Director	Derivative	Common Stock	16,547^{footnote F1,F2}	$18.50	$306K
Oct 6, 2026	Daniel L. Weiner - Director	Derivative	Stock Options (Right to Buy)	2,000^{footnote F3}	-^{footnote F4}	-
Oct 6, 2026	Daniel L. Weiner - Director	Derivative	Stock Options (Right to Buy)	5,000^{footnote F3}	-^{footnote F4}	-
Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR Footnote F3 (shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested and was canceled and… Full note on SEC EDGAR Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.
Oct 6, 2026	Walter S. Woltosz - Director	Derivative	Common Stock	3,202,131^{footnote F1,F2,F3}	$18.50	$59.24M
Oct 6, 2026	Walter S. Woltosz - Director	Derivative	Stock Options (Right to Buy)	5,000^{footnote F3,F4}	-^{footnote F5}	-
Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR Footnote F3 (shares): The securities reported herein were held jointly by Walter S. Woltosz and Virginia E. Woltosz. Footnote F4 (shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR Footnote F5 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.
Oct 6, 2026	Shawn Oconnor - Officer	Derivative	Stock Options (Right to Buy)	50,000^{footnote F1}	-^{footnote F1}	-
Oct 6, 2026	Shawn Oconnor - Officer	Derivative	Stock Options (Right to Buy)	20,000^{footnote F1}	-^{footnote F2}	-
Oct 6, 2026	Shawn Oconnor - Officer	Derivative	Stock Options (Right to Buy)	20,000^{footnote F1}	-^{footnote F2}	-
Oct 6, 2026	Shawn Oconnor - Officer	Derivative	Stock Options (Right to Buy)	25,000^{footnote F1}	-^{footnote F2}	-
Oct 6, 2026	Shawn Oconnor - Officer	Derivative	Stock Options (Right to Buy)	50,000^{footnote F1}	-^{footnote F2}	-
Oct 6, 2026	Shawn Oconnor - Officer	Derivative	Stock Options (Right to Buy)	50,000^{footnote F1}	-^{footnote F2}	-
Oct 6, 2026	Shawn Oconnor - Officer	Derivative	Stock Options (Right to Buy)	32,500^{footnote F1}	-^{footnote F2}	-
Footnote F1 (price, shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"). Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares… Full note on SEC EDGAR Footnote F2 (price): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR
Aug 3, 2026	John Anthony Dibella II - Officer	Open-market sale	Common Stock	1,000	$18.28^{footnote F2}	$18K
Footnote F2 (price): These shares were sold in a single transaction at $18.28.
Jul 6, 2026	John Anthony Dibella II - Officer	Open-market sale	Common Stock	1,000	$18.36^{footnote F2}	$18K
Footnote F2 (price): These shares were sold in multiple transactions at prices ranging from $18.34 to $18.39, inclusive.
Jul 1, 2026	Walter S. Woltosz - Director	Open-market sale	Common Stock	4,177	$18.44^{footnote F2,F3}	$77K
Footnote F2 (price): These shares were sold in multiple transactions at prices falling within those ranges set forth in footnotes (3) of this Form 4. The reporting persons undertake to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission… Full note on SEC EDGAR Footnote F3 (price): These shares were sold in multiple transactions at prices ranging from $18.36 to $18.49, inclusive.
Jun 16, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Common Stock	7,350	$10.05	$74K
Jun 16, 2026	Jill Fiedler-Kelly - Officer	Open-market sale	Common Stock	7,350	$18.20^{footnote F2}	$134K
Jun 16, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Employee Stock Option (Right to Buy)	7,350	$0.00	-
Footnote F2 (price): These shares were sold in a single transaction at $18.20.
Jun 15, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Common Stock	1,050	$10.05	$11K
Jun 15, 2026	Jill Fiedler-Kelly - Officer	Open-market sale	Common Stock	1,050	$16.51^{footnote F2}	$17K
Jun 15, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Employee Stock Option (Right to Buy)	1,050	$0.00	-
Footnote F2 (price): These shares were sold in a single transaction at $16.51.
Jun 3, 2026	John Anthony Dibella II - Officer	Open-market sale	Common Stock	1,000	$16.50^{footnote F2}	$17K
Footnote F2 (price): These shares were sold in a single transaction at $16.50.
Jun 1, 2026	Walter S. Woltosz - Director	Open-market sale	Common Stock	15,000	$17.43^{footnote F2,F3}	$261K
Footnote F2 (price): These shares were sold in multiple transactions at prices falling within those ranges set forth in footnotes (3) of this Form 4. The reporting persons undertake to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission… Full note on SEC EDGAR Footnote F3 (price): These shares were sold in multiple transactions at prices ranging from $16.61 to $17.75, inclusive.
May 11, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Common Stock	1,000	$10.05	$10K
May 11, 2026	Jill Fiedler-Kelly - Officer	Open-market sale	Common Stock	1,000	$16.53^{footnote F2}	$17K
May 11, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Employee Stock Option (Right to Buy)	1,000	$0.00	-
Footnote F2 (price): These shares were sold in a single transaction at $16.53.
May 4, 2026	John Anthony Dibella II - Officer	Open-market sale	Common Stock	1,000	$14.98^{footnote F2}	$15K
Footnote F2 (price): These shares were sold in a single transaction at $14.98.
May 4, 2026	Walter S. Woltosz - Director	Open-market sale	Common Stock	15,000	$15.13^{footnote F2,F3}	$227K
Footnote F2 (price): These shares were sold in multiple transactions at prices falling within those ranges set forth in footnote (3) of this Form 4. The reporting persons undertake to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission… Full note on SEC EDGAR Footnote F3 (price): These shares were sold in multiple transactions at prices ranging from $15.00 to $15.24, inclusive.
May 1, 2026	Sharlene Evans - Director	Grant or award	Common Stock	2,117	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
May 1, 2026	Walter S. Woltosz - Director	Grant or award	Common Stock	2,117	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
May 1, 2026	Daniel L. Weiner - Director	Grant or award	Common Stock	2,117	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
May 1, 2026	John Kenneth Paglia - Director	Grant or award	Common Stock	2,117	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
Apr 15, 2026	John Anthony Dibella II - Officer	Open-market sale	Common Stock	1,000	$13.37^{footnote F2}	$13K
Footnote F2 (price): There shares were sold in a single transaction at $13.37.
Feb 6, 2026	John Anthony Dibella II - Officer	Option exercise	Common Stock	10,300	$9.71	$100K
Feb 6, 2026	John Anthony Dibella II - Officer	Option exercise	Stock Options (Right to Buy)	10,300	$0.00	-
Jan 30, 2026	Walter S. Woltosz - Director	Grant or award	Common Stock	1,776	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
Jan 30, 2026	Sharlene Evans - Director	Grant or award	Common Stock	1,776	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
Jan 30, 2026	Daniel L. Weiner - Director	Grant or award	Common Stock	1,776	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
Jan 30, 2026	John Kenneth Paglia - Director	Grant or award	Common Stock	1,776	$0.00^{footnote F1}	-
Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.
Jan 28, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Common Stock	8,950	$9.71	$87K
Jan 28, 2026	Jill Fiedler-Kelly - Officer	Option exercise	Employee Stock Option (Right to Buy)	8,950	$0.00	-
Dec 1, 2025	Lisa Lavange - Director	Open-market sale	Common Stock	866	$16.91^{footnote F2}	$15K
Footnote F2 (price): There shares were sold in a single transaction at $16.91.

Recent SLP Form 8-K filings

Read SLP company news

Oct 6, 2026Item 2.01, 3.01, 3.03, 5.01, 5.02, 5.03, 7.01, 9.01

Read the filing on SEC EDGAR

Aug 28, 2026Item 5.07, 9.01

Read the filing on SEC EDGAR

Aug 13, 2026Item 8.01, 9.01

Read the filing on SEC EDGAR

Jul 9, 2026Item 2.02, 7.01, 9.01

Recent SLP Form 144 notices of proposed sale

An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.

Filed	Filer	Relationship	Shares	Market value	Notice
Aug 3, 2026	JOHN ANTHONY DIBELLA II	Officer	3,000	$55K	View on EDGAR
Jul 1, 2026	-	-	-	-

SLP insider trading FAQ

What is the latest insider trade for SLP?

Simulations Plus, Inc. (SLP) had 9 insider filings in the last 90 days, with the most recent on 2026-10-06. The full record for SLP runs to 69 Form 4 filings, the earliest from 2024-10-01. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying SLP stock?

No insider purchases of SLP were filed in the last 90 days.

How many insiders are selling SLP stock?

1 insider sale of SLP was filed in the last 90 days, totaling $18K.

Where can I see SLP SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects SLP Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Information Technology companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Oct 6, 2026 - John Anthony Dibella II view on EDGAR
Oct 6, 2026 - Sharlene Evans view on EDGAR
Oct 6, 2026 - Jill Fiedler-Kelly view on EDGAR
Oct 6, 2026 - William W. Frederick view on EDGAR
Oct 6, 2026 - John Kenneth Paglia view on EDGAR
Oct 6, 2026 - Daniel L. Weiner view on EDGAR
Oct 6, 2026 - Walter S. Woltosz view on EDGAR
Oct 6, 2026 - Shawn Oconnor view on EDGAR
Aug 4, 2026 - John Anthony Dibella II view on EDGAR

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Learn more

Insider selling: signal or noise?: Why most insider sales are routine, and the few patterns worth a second look.
Form 144 vs Form 4: A Form 144 announces a planned sale; the Form 4 reports it after it happens.
Insider activity in Information Technology: Where SLP's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Open-market sale

1,000

$18K

Derivative transaction

4,101,192

Date

Insider

Transaction

Security

Price

Value

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Common Stock

85,140^{footnote F1,F2}

$18.50

$1.58M

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

27,500^{footnote F3}

-^{footnote F3}

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

26,206^{footnote F3}

-^{footnote F3}

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

9,300^{footnote F3}

-^{footnote F4}

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

113,300^{footnote F3}

-^{footnote F4}

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

15,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

15,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

2,589^{footnote F3}

-^{footnote F4}

Oct 6, 2026

John Anthony Dibella II - Officer

Derivative

Stock Options (Right to Buy)

7,500^{footnote F3}

-^{footnote F4}

Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR
Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR
Footnote F3 (price, shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR
Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.

Oct 6, 2026

Sharlene Evans - Director

Derivative

Common Stock

17,173^{footnote F1,F2}

$18.50

$318K

Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR
Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically converted into the right… Full note on SEC EDGAR

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Common Stock

77,817^{footnote F1,F2}

$18.50

$1.44M

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

27,500^{footnote F3}

-^{footnote F3}

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

15,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

15,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

7,500^{footnote F3}

-^{footnote F4}

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

7,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

5,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

9,300^{footnote F3}

-^{footnote F4}

Oct 6, 2026

Jill Fiedler-Kelly - Officer

Derivative

Stock Options (Right to Buy)

5,000^{footnote F3}

-^{footnote F4}

Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR
Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR
Footnote F3 (price, shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR
Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.

Oct 6, 2026

William W. Frederick - Officer

Derivative

Common Stock

2,100^{footnote F1,F2}

$18.50

$39K

Oct 6, 2026

William W. Frederick - Officer

Derivative

Stock Options (Right to Buy)

32,500^{footnote F3}

-^{footnote F3}

Oct 6, 2026

William W. Frederick - Officer

Derivative

Stock Options (Right to Buy)

20,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

William W. Frederick - Officer

Derivative

Stock Options (Right to Buy)

20,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

William W. Frederick - Officer

Derivative

Stock Options (Right to Buy)

25,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

William W. Frederick - Officer

Derivative

Stock Options (Right to Buy)

10,000^{footnote F3}

-^{footnote F4}

Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR
Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR
Footnote F3 (price, shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested and was canceled and… Full note on SEC EDGAR
Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.

Oct 6, 2026

John Kenneth Paglia - Director

Derivative

Common Stock

14,589^{footnote F1,F2}

$18.50

$270K

Oct 6, 2026

John Kenneth Paglia - Director

Derivative

Stock Options (Right to Buy)

6,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

John Kenneth Paglia - Director

Derivative

Stock Options (Right to Buy)

5,000^{footnote F3}

-^{footnote F4}

Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR
Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR
Footnote F3 (shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR
Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.

Oct 6, 2026

Daniel L. Weiner - Director

Derivative

Common Stock

16,547^{footnote F1,F2}

$18.50

$306K

Oct 6, 2026

Daniel L. Weiner - Director

Derivative

Stock Options (Right to Buy)

2,000^{footnote F3}

-^{footnote F4}

Oct 6, 2026

Daniel L. Weiner - Director

Derivative

Stock Options (Right to Buy)

5,000^{footnote F3}

-^{footnote F4}

Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR
Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR
Footnote F3 (shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested and was canceled and… Full note on SEC EDGAR
Footnote F4 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.

Oct 6, 2026

Walter S. Woltosz - Director

Derivative

Common Stock

3,202,131^{footnote F1,F2,F3}

$18.50

$59.24M

Oct 6, 2026

Walter S. Woltosz - Director

Derivative

Stock Options (Right to Buy)

5,000^{footnote F3,F4}

-^{footnote F5}

Footnote F1 (shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"), by and among Simulations Plus, Inc. (the "Issuer"), SP Evolution HoldCo II, LLC ("Parent") and SP Evolution BidCo II, LLC, a… Full note on SEC EDGAR
Footnote F2 (shares): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR
Footnote F3 (shares): The securities reported herein were held jointly by Walter S. Woltosz and Virginia E. Woltosz.
Footnote F4 (shares): Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares of Company Common Stock (each, a "Company Option") that was outstanding immediately prior to the Effective Time automatically vested in full and was… Full note on SEC EDGAR
Footnote F5 (price): Any such Company Option with a per share exercise price that was equal to or greater than the Merger Consideration was canceled by virtue of the Merger without any payment to the reporting person.

Oct 6, 2026

Shawn Oconnor - Officer

Derivative

Stock Options (Right to Buy)

50,000^{footnote F1}

-^{footnote F1}

Oct 6, 2026

Shawn Oconnor - Officer

Derivative

Stock Options (Right to Buy)

20,000^{footnote F1}

-^{footnote F2}

Oct 6, 2026

Shawn Oconnor - Officer

Derivative

Stock Options (Right to Buy)

20,000^{footnote F1}

-^{footnote F2}

Oct 6, 2026

Shawn Oconnor - Officer

Derivative

Stock Options (Right to Buy)

25,000^{footnote F1}

-^{footnote F2}

Oct 6, 2026

Shawn Oconnor - Officer

Derivative

Stock Options (Right to Buy)

50,000^{footnote F1}

-^{footnote F2}

Oct 6, 2026

Shawn Oconnor - Officer

Derivative

Stock Options (Right to Buy)

50,000^{footnote F1}

-^{footnote F2}

Oct 6, 2026

Shawn Oconnor - Officer

Derivative

Stock Options (Right to Buy)

32,500^{footnote F1}

-^{footnote F2}

Footnote F1 (price, shares): This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of June 15, 2026 (the "Merger Agreement"). Pursuant to the Merger Agreement, effective as of or immediately prior to the Effective Time, each option to purchase shares… Full note on SEC EDGAR
Footnote F2 (price): At the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Company Common Stock") issued and outstanding immediately prior to the Effective Time (other than certain excluded shares specified in the Merger Agreement) was automatically… Full note on SEC EDGAR

Aug 3, 2026

John Anthony Dibella II - Officer

Open-market sale

Common Stock

1,000

$18.28^{footnote F2}

$18K

Footnote F2 (price): These shares were sold in a single transaction at $18.28.

Jul 6, 2026

John Anthony Dibella II - Officer

Open-market sale

Common Stock

1,000

$18.36^{footnote F2}

$18K

Footnote F2 (price): These shares were sold in multiple transactions at prices ranging from $18.34 to $18.39, inclusive.

Jul 1, 2026

Walter S. Woltosz - Director

Open-market sale

Common Stock

4,177

$18.44^{footnote F2,F3}

$77K

Footnote F2 (price): These shares were sold in multiple transactions at prices falling within those ranges set forth in footnotes (3) of this Form 4. The reporting persons undertake to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission… Full note on SEC EDGAR
Footnote F3 (price): These shares were sold in multiple transactions at prices ranging from $18.36 to $18.49, inclusive.

Jun 16, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Common Stock

7,350

$10.05

$74K

Jun 16, 2026

Jill Fiedler-Kelly - Officer

Open-market sale

Common Stock

7,350

$18.20^{footnote F2}

$134K

Jun 16, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Employee Stock Option (Right to Buy)

7,350

$0.00

Footnote F2 (price): These shares were sold in a single transaction at $18.20.

Jun 15, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Common Stock

1,050

$10.05

$11K

Jun 15, 2026

Jill Fiedler-Kelly - Officer

Open-market sale

Common Stock

1,050

$16.51^{footnote F2}

$17K

Jun 15, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Employee Stock Option (Right to Buy)

1,050

$0.00

Footnote F2 (price): These shares were sold in a single transaction at $16.51.

Jun 3, 2026

John Anthony Dibella II - Officer

Open-market sale

Common Stock

1,000

$16.50^{footnote F2}

$17K

Footnote F2 (price): These shares were sold in a single transaction at $16.50.

Jun 1, 2026

Walter S. Woltosz - Director

Open-market sale

Common Stock

15,000

$17.43^{footnote F2,F3}

$261K

Footnote F2 (price): These shares were sold in multiple transactions at prices falling within those ranges set forth in footnotes (3) of this Form 4. The reporting persons undertake to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission… Full note on SEC EDGAR
Footnote F3 (price): These shares were sold in multiple transactions at prices ranging from $16.61 to $17.75, inclusive.

May 11, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Common Stock

1,000

$10.05

$10K

May 11, 2026

Jill Fiedler-Kelly - Officer

Open-market sale

Common Stock

1,000

$16.53^{footnote F2}

$17K

May 11, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Employee Stock Option (Right to Buy)

1,000

$0.00

Footnote F2 (price): These shares were sold in a single transaction at $16.53.

May 4, 2026

John Anthony Dibella II - Officer

Open-market sale

Common Stock

1,000

$14.98^{footnote F2}

$15K

Footnote F2 (price): These shares were sold in a single transaction at $14.98.

May 4, 2026

Walter S. Woltosz - Director

Open-market sale

Common Stock

15,000

$15.13^{footnote F2,F3}

$227K

Footnote F2 (price): These shares were sold in multiple transactions at prices falling within those ranges set forth in footnote (3) of this Form 4. The reporting persons undertake to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission… Full note on SEC EDGAR
Footnote F3 (price): These shares were sold in multiple transactions at prices ranging from $15.00 to $15.24, inclusive.

May 1, 2026

Sharlene Evans - Director

Grant or award

Common Stock

2,117

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

May 1, 2026

Walter S. Woltosz - Director

Grant or award

Common Stock

2,117

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

May 1, 2026

Daniel L. Weiner - Director

Grant or award

Common Stock

2,117

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

May 1, 2026

John Kenneth Paglia - Director

Grant or award

Common Stock

2,117

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

Apr 15, 2026

John Anthony Dibella II - Officer

Open-market sale

Common Stock

1,000

$13.37^{footnote F2}

$13K

Footnote F2 (price): There shares were sold in a single transaction at $13.37.

Feb 6, 2026

John Anthony Dibella II - Officer

Option exercise

Common Stock

10,300

$9.71

$100K

Feb 6, 2026

John Anthony Dibella II - Officer

Option exercise

Stock Options (Right to Buy)

10,300

$0.00

Jan 30, 2026

Walter S. Woltosz - Director

Grant or award

Common Stock

1,776

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

Jan 30, 2026

Sharlene Evans - Director

Grant or award

Common Stock

1,776

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

Jan 30, 2026

Daniel L. Weiner - Director

Grant or award

Common Stock

1,776

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

Jan 30, 2026

John Kenneth Paglia - Director

Grant or award

Common Stock

1,776

$0.00^{footnote F1}

Footnote F1 (price): Stock granted as independent director compensation, issued under the issuer's 2021 Equity Incentive Plan.

Jan 28, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Common Stock

8,950

$9.71

$87K

Jan 28, 2026

Jill Fiedler-Kelly - Officer

Option exercise

Employee Stock Option (Right to Buy)

8,950

$0.00

Dec 1, 2025

Lisa Lavange - Director

Open-market sale

Common Stock

866

$16.91^{footnote F2}

$15K

Footnote F2 (price): There shares were sold in a single transaction at $16.91.

Filed

Filer

Relationship

Market value

Notice

Aug 3, 2026

JOHN ANTHONY DIBELLA II

Officer

3,000

$55K

View on EDGAR

Jul 1, 2026