Simulations Plus (SLP) insiders sell 4,177 shares under 10b5-1 plan

Rhea-AI Filing Summary

Simulations Plus, Inc. insiders Walter S. and Virginia E. Woltosz, both reported as ten percent owners (with Walter also a director), executed an automatic open-market sale of 4,177 shares of Common Stock on July 1, 2026 at an average price of $18.44 per share under a Rule 10b5-1 trading plan. Following this transaction, their reported direct holdings total 3,202,131 shares of Simulations Plus common stock. The filing also notes a correction removing 46,492 shares that had been inadvertently included in previously reported holdings.

Insider Trade Summary 10b5-1

Net Seller: 4,177 shares ($77,024)

Net Sell 1 txn

Insider WOLTOSZ WALTER S, WOLTOSZ VIRGINIA E

Role null | null

Sold 4,177 shs ($77K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,177	$18.44	$77K

Holdings After Transaction: Common Stock — 3,202,131 shares (Direct, null)

Footnotes (1)

1. The sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 plan adopted by the reporting persons. 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, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the relevant footnotes. These shares were sold in multiple transactions at prices ranging from $18.36 to $18.49, inclusive. The number of shares reflects a revision to correct the inadvertent inclusion of 46,492 shares of the issuer's common stock from previously reported holdings of the reporting persons.

Key Figures

Shares sold: 4,177 shares Average sale price: $18.44 per share Post-transaction holdings: 3,202,131 shares +2 more

5 metrics

Shares sold 4,177 shares Open-market sale on July 1, 2026

Average sale price $18.44 per share Common Stock sale

Post-transaction holdings 3,202,131 shares Direct Common Stock held after sale

Price range of trades $18.36–$18.49 Multiple transactions within this range

Correction to prior holdings 46,492 shares Previously overstated holdings removed

Key Terms

Rule 10b5-1 plan, open-market sale, ten percent owner, Common Stock

4 terms

Rule 10b5-1 plan financial

"The sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 plan adopted by the reporting persons."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

open-market sale financial

"transaction_action: open-market sale, transaction_code_description: Sale in open market or private transaction"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

ten percent owner financial

"both reporting persons are indicated as is_ten_percent_owner: 1"

Common Stock financial

"security_title: Common Stock for the reported transaction"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/06/2026 - 06:51 PM Accepted by SEC EDGAR 07/06/2026 - 06:50 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

WOLTOSZ WALTER S

(Last) (First) (Middle)

600 PARK OFFICES DRIVE

SUITE 300-4314

(Street)

DURHAM NORTH CAROLINA 27713

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Simulations Plus, Inc. [ SLP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/01/2026		S(1)		4,177	D	$18.44(2)(3)	3,202,131(4)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

WOLTOSZ WALTER S

(Last) (First) (Middle)

600 PARK OFFICES DRIVE

SUITE 300-4314

(Street)

DURHAM NORTH CAROLINA 27713

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

WOLTOSZ VIRGINIA E

(Last) (First) (Middle)

600 PARK OFFICES DRIVE

SUITE 300-4134

(Street)

DURHAM NORTH CAROLINA 27713

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. The sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 plan adopted by the reporting persons.

2. 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, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the relevant footnotes.

3. These shares were sold in multiple transactions at prices ranging from $18.36 to $18.49, inclusive.

4. The number of shares reflects a revision to correct the inadvertent inclusion of 46,492 shares of the issuer's common stock from previously reported holdings of the reporting persons.

Remarks:

	/s/ William Frederick, attorney-in-fact for Walter S. Woltosz and Virginia E. Woltosz	07/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Simulations Plus (SLP) report on this Form 4?

Simulations Plus reported an insider sale of 4,177 shares of Common Stock. Walter S. and Virginia E. Woltosz, both ten percent owners, sold these shares in an open-market transaction, with the sale documented as occurring on July 1, 2026 at an average price of $18.44 per share.

At what price did Simulations Plus (SLP) insiders sell their shares?

The 4,177 Simulations Plus shares were sold at an average price of $18.44. Footnotes state the shares were sold in multiple transactions within a price range from $18.36 to $18.49. The sale was executed automatically pursuant to a pre-established Rule 10b5-1 trading plan.

How many Simulations Plus (SLP) shares do the reporting persons hold after the sale?

After the transaction, reported direct holdings total 3,202,131 Simulations Plus shares. This figure reflects the remaining Common Stock owned by the reporting persons following the 4,177-share open-market sale noted in the Form 4, as well as a correction to previously overstated holdings.

Was the Simulations Plus (SLP) insider sale made under a Rule 10b5-1 plan?

Yes, the insider sale was executed under a Rule 10b5-1 trading plan. A footnote explains that the sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 plan adopted by the reporting persons, indicating the trades were pre-arranged rather than discretionary.

What correction to prior Simulations Plus (SLP) holdings did the Form 4 disclose?

The Form 4 corrects an earlier overstatement of 46,492 shares. A footnote specifies that the current number of shares reflects a revision to remove 46,492 Simulations Plus common shares that had been inadvertently included in previously reported holdings by the reporting persons.

Who are the insiders involved in the Simulations Plus (SLP) Form 4 filing?

The insiders are Walter S. Woltosz and Virginia E. Woltosz. Walter is identified as a director and ten percent owner, while Virginia is identified as a ten percent owner. Together, they reported the automatic open-market sale of 4,177 Simulations Plus common shares on July 1, 2026.