Simulations Plus (SLP) CRO boosts direct stake to 90,140 shares

Rhea-AI Filing Summary

Simulations Plus Chief Revenue Officer John Anthony DiBella II exercised fully vested stock options for 10,300 shares of common stock on February 6, 2026. The options were exercised at $9.71 per share, converting derivative securities into common stock.

Following this transaction, DiBella directly beneficially owns 90,140 shares of Simulations Plus common stock. The derivative position reported as stock options was reduced to zero as a result of the exercise.

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

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

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^*

DiBella John Anthony II

(Last) (First) (Middle)

800 PARK OFFICES DRIVE

SUITE 401

(Street)

RESEARCH TRIANGLE PARK NC 27709

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/06/2026

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

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

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

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	02/06/2026		M		10,300	A	$9.71	90,140	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
Stock Options (Right to Buy)	$9.71	02/06/2026		M			10,300	(1)	02/25/2026	Common Stock	10,300	$0	0	D

Explanation of Responses:

1. Fully vested.

Remarks:

	/s/ William Frederick, attorney-in-fact for John Anthony DiBella	02/09/2026
	** 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.

FAQ

What insider transaction did Simulations Plus (SLP) report for John Anthony DiBella II?

Simulations Plus reported that Chief Revenue Officer John Anthony DiBella II exercised stock options for 10,300 shares of common stock. The transaction occurred on February 6, 2026, and was coded as an option exercise (code M) under SEC Form 4 reporting rules.

How many Simulations Plus (SLP) shares does the CRO own after this Form 4?

After the reported transaction, Chief Revenue Officer John Anthony DiBella II directly beneficially owns 90,140 shares of Simulations Plus common stock. This reflects the addition of 10,300 shares acquired through the exercise of stock options reported in the filing.

At what price were the Simulations Plus (SLP) stock options exercised?

The stock options were exercised into Simulations Plus common stock at an exercise price of $9.71 per share. This price applies to the 10,300 shares acquired in the transaction dated February 6, 2026, as disclosed in the Form 4 tables.

What type of securities were involved in the Simulations Plus (SLP) insider transaction?

The filing shows an exercise of stock options (right to buy) into common stock. 10,300 derivative securities were exercised, resulting in 10,300 shares of common stock acquired and the derivative position reduced to zero following the transaction.

What role does the reporting person hold at Simulations Plus (SLP)?

The reporting person, John Anthony DiBella II, serves as Chief Revenue Officer of Simulations Plus. He is not listed as a director or 10% owner in the filing, but is identified as an officer with this specific executive title.

Were the Simulations Plus (SLP) stock options fully vested at exercise?

Yes. A footnote in the Form 4 states the stock options were “Fully vested.” This indicates that, at the time of the February 6, 2026 transaction, the options were fully exercisable when converted into 10,300 shares of common stock.