OSI Systems Form 4: Ballhaus Trust Reports 26,162 Shares Beneficially Owned

Rhea-AI Filing Summary

William F. Ballhaus Jr., a director of OSI Systems, reported changes in his beneficial ownership on Form 4. On 08/20/2025 he purchased 1,007 shares of OSIS common stock at $223.39 per share and, following the transaction, beneficially owned 26,162 shares indirectly through the Ballhaus Trust. The filing also reports a disposition of 3,701 shares (reported on the same table). The Ballhaus Trust is identified as U/A 1/25/02 with William Ballhaus Jr. and Jane K. Ballhaus as trustees. The Form 4 was signed on 08/22/2025.

Positive

• Purchased 1,007 OSIS shares at a disclosed price of $223.39, indicating a clear, reported acquisition
• Indirect beneficial ownership of 26,162 shares held via the Ballhaus Trust, clearly identified with trustees

Negative

• Disposed of 3,701 shares as reported on the same filing, reducing direct holdings
• No disclosure of the reason for the purchase or sale is provided in the filing (only transactional details)

Insights

Financial Analyst

TL;DR: Insider activity shows both a purchase and a sale on 08/20/2025, leaving meaningful indirect ownership via a family trust.

The reported acquisition of 1,007 shares at $223.39 and the reported disposition of 3,701 shares result in an indicated indirect beneficial position of 26,162 shares held through the Ballhaus Trust. This filing documents routine Section 16 reporting of insider transactions rather than operational or financial results. The mix of buy and sell on the same report is factual; no additional context about purpose, timing beyond the dates provided, or proportional ownership relative to outstanding shares is disclosed in the filing.

Corporate Governance Expert

TL;DR: Director-level insider reported transactions and trust-based indirect ownership; disclosures appear complete per Form 4 format.

The Form 4 identifies Ballhaus as a director and lists the Ballhaus Trust as indirect owner with trustees named. The document includes transaction codes and prices for the non-derivative trades and a signature dated 08/22/2025. There is no indication of amendments or additional reporting persons. The filing supplies the necessary ownership and transaction details but does not provide motives or plan-level information, which is typical for Form 4s.

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
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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.
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 transactions did William Ballhaus Jr. report for OSIS on 08/20/2025?

The Form 4 reports a purchase of 1,007 shares at $223.39 per share and a disposition of 3,701 shares, both reflected in the filing.

How many OSIS shares does William Ballhaus Jr. beneficially own after the reported transactions?

The filing reports 26,162 shares beneficially owned following the reported transaction(s), held indirectly through the Ballhaus Trust.

Who is listed as the indirect owner of the OSIS shares in the Form 4?

The indirect owner is the Ballhaus Trust U/A 1/25/02, with Dr. William Ballhaus Jr. and Jane K. Ballhaus named as trustees.

When was the Form 4 signed and filed by the reporting person?

The signature block shows the Form 4 was signed by /s/ William Ballhaus on 08/22/2025.

What role does William Ballhaus Jr. have at OSI Systems as listed on the filing?

He is identified as a Director of OSI Systems in the Form 4.