Director Ballhaus Reports Acquisition and Disposition of OSIS Shares

Rhea-AI Filing Summary

William Francis Ballhaus Jr., a director of OSI Systems, purchased 1,007 shares of OSIS common stock on 08/20/2025 at a reported price of $223.39 per share under transaction code A (acquisition). After the transaction, the filing shows beneficial ownership of 26,162 shares held indirectly through the Ballhaus Trust U/A 1/25/02 (with Dr. William Ballhaus Jr. and Jane K. Ballhaus as trustees). The filing also reports a separate disposition of 3,701 shares (no price shown). The Form 4 was signed by Mr. Ballhaus on 08/22/2025 and lists his relationship as a director.

Insights

Securities Analyst

TL;DR: Insider purchased 1,007 OSIS shares at $223.39, holdings now 26,162 shares indirectly; transaction appears routine and not sizable.

The purchase increases Director Ballhaus's indirect stake via the Ballhaus Trust to 26,162 shares. The acquisition price of $223.39 is explicit and the filing documents an offsetting disposition of 3,701 shares on the same report. The sizes here are modest relative to typical public-company float and the filing contains no additional context such as 10b5-1 plan designation or intent. For investors, this is a transparent disclosure of insider activity but not a material corporate event.

Corporate Governance Expert

TL;DR: Disclosure is complete for the reported transactions; ownership is held indirectly through a family trust.

The Form 4 properly identifies the reporting person as a director and specifies indirect beneficial ownership via Ballhaus Trust U/A 1/25/02, naming trustees. The form shows both an acquisition and a disposition, and is signed, satisfying Section 16 reporting mechanics. The filing does not assert an affirmative defense or plan designation. From a compliance perspective, the document meets required disclosure elements without revealing additional governance implications.

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^*

Ballhaus William Francis JR

(Last) (First) (Middle)

12525 CHADRON AVE

(Street)

HAWTHORNE CA 90250

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
OSI SYSTEMS INC [ OSIS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2025

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	08/20/2025		A		1,007	A	$223.39	26,162	I	Ballhaus Trust - See Footnote(1)
Common Stock								3,701	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

Explanation of Responses:

1. Ballhaus Trust U/A 1/25/02 Dr. William Ballhaus Jr. and Jane K Ballhaus Trustees.

	/s/ William Ballhaus	08/22/2025
	** 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.
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