Simulations Plus (SLP) major holders sell 15,000 shares under 10b5-1 plan

Rhea-AI Filing Summary

Simulations Plus, Inc. major shareholders Walter S. and Virginia E. Woltsoz reported an open-market sale of 15,000 shares of Common Stock on 2026-06-01 at an average price of $17.43 per share. The sale was executed automatically under a pre-arranged Rule 10b5-1 trading plan adopted by the reporting persons. After the transaction, they collectively reported direct ownership of 3,252,800 shares of Simulations Plus Common Stock.

Insider Trade Summary 10b5-1

Net Seller: 15,000 shares ($261,450)

Net Sell 1 txn

Insider WOLTOSZ WALTER S, WOLTOSZ VIRGINIA E

Role null | null

Sold 15,000 shs ($261K)

Type	Security	Shares	Price	Value
Sale	Common Stock	15,000	$17.43	$261K

Holdings After Transaction: Common Stock — 3,252,800 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 $16.61 to $17.75, inclusive.

Key Figures

Shares sold: 15,000 shares Average sale price: $17.43 per share Post-transaction holdings: 3,252,800 shares +1 more

4 metrics

Shares sold 15,000 shares Open-market sale on June 1, 2026

Average sale price $17.43 per share Common Stock sale on June 1, 2026

Post-transaction holdings 3,252,800 shares Direct ownership after sale

Price range of trades $16.61–$17.75 per share Multiple transactions within this range

Key Terms

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

4 terms

Rule 10b5-1 plan regulatory

"The sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 plan"

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""

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.

Common Stock financial

"security_title": "Common Stock""

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.

ten percent owner regulatory

"is_ten_percent_owner": 1"

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Form 4 Insider Transactions: What Each Field Means →

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)

800 PARK OFFICES DRIVE

SUITE 401

(Street)

RESEARCH TRIANGLE PARK NORTH CAROLINA 27709

(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)
06/01/2026

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	06/01/2026		S(1)		15,000	D	$17.43(2)(3)	3,252,800	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)

800 PARK OFFICES DRIVE

SUITE 401

(Street)

RESEARCH TRIANGLE PARK NORTH CAROLINA 27709

(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)

800 PARK OFFICES DRIVE

SUITE 401

(Street)

RESEARCH TRIANGLE PARK NORTH CAROLINA 27709

(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 $16.61 to $17.75, inclusive.

Remarks:

	/s/ William Frederick, attorney-in-fact for Walter S. Woltosz and Virginia E. Woltosz	06/02/2026
	** 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 in this Form 4?

Simulations Plus insiders Walter S. and Virginia E. Woltosz reported selling 15,000 shares of Common Stock on June 1, 2026. The shares were sold in an open-market transaction at an average price of $17.43 per share.

At what prices were the Simulations Plus (SLP) insider shares sold?

The 15,000 Simulations Plus shares were sold at an average price of $17.43 each. Footnotes explain the sale occurred in multiple trades at prices ranging from $16.61 to $17.75 per share, all within that disclosed range.

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

Following the reported sale, the insiders collectively reported holding 3,252,800 shares of Simulations Plus Common Stock directly. This figure reflects their position immediately after the 15,000-share open-market sale disclosed in the Form 4.

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

Yes. The Form 4 states the sales were executed automatically under a Rule 10b5-1 trading plan adopted by the reporting persons. Such plans pre-schedule trades, reducing the significance of short-term market timing for the transaction.

Who are the reporting persons in this Simulations Plus (SLP) Form 4 filing?

The reporting persons are Walter S. Woltosz, a director and ten percent owner, and Virginia E. Woltosz, also a ten percent owner. Both are identified as major shareholders of Simulations Plus in the Form 4 filing.