OSIS Insider Report: William Ballhaus Reports 1,007-Share Purchase, 3,701-Share Sale

Rhea-AI Filing Summary

William F. Ballhaus Jr., a director of OSI Systems, Inc. (OSIS), reported insider transactions on Form 4 covering activity dated 08/20/2025. The filing shows an acquisition of 1,007 shares of OSIS common stock at a price of $223.39 per share, and a contemporaneous disposition of 3,701 shares. After the reported acquisition, the filing discloses beneficial ownership of 26,162 shares held indirectly through the Ballhaus Trust U/A 1/25/02, for which Dr. William Ballhaus Jr. and Jane K. Ballhaus are trustees. The Form 4 is signed by Mr. Ballhaus on 08/22/2025.

Positive

• Acquisition disclosed: Reporting person acquired 1,007 shares at $223.39, explicitly reported on Form 4.
• Transparent trust disclosure: Beneficial ownership of 26,162 shares is identified as held indirectly via the Ballhaus Trust with trustees named in the footnote.
• Form properly signed: Filing is signed by William Ballhaus on 08/22/2025, indicating timely execution of the report.

Negative

• Disposition reported: Reporting person disposed of 3,701 shares on the same transaction date, reducing direct holdings.
• No price shown for disposition: The filing does not state the sale price for the 3,701 shares, limiting full transparency on economic terms of the sale.

Insights

Financial Analyst

TL;DR: Routine insider purchase and sale by a director with modest net change in beneficial holdings; not clearly material to company fundamentals.

The filing documents a same-day acquisition of 1,007 shares at $223.39 and a disposition of 3,701 shares, leaving an indirect beneficial stake of 26,162 shares via the Ballhaus Trust. These transactions are discrete equity movements by a director and do not include additional contextual details such as purpose, aggregated cost basis, or whether the trades were part of a 10b5-1 plan. Based solely on the reported amounts, the activity appears transactional rather than a clearly material change to ownership structure.

Corporate Governance Expert

TL;DR: Disclosure complies with Section 16 reporting; transactions affect indirect trust holdings and are routine insider reporting.

The Form 4 identifies Mr. Ballhaus as a director and reports acquisitions and dispositions affecting both direct and indirect ownership, with the Ballhaus Trust named as indirect holder and trustees disclosed. The form is signed and dated, meeting formal filing requirements. The filing does not show any change in control or new beneficial ownership thresholds that would raise governance concerns based on the data provided.

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).

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 OSIS director William Ballhaus report on Form 4?

The Form 4 reports an acquisition of 1,007 shares at $223.39 and a disposition of 3,701 shares, both dated 08/20/2025.

How many OSIS shares does William Ballhaus beneficially own after the reported transaction?

The filing discloses 26,162 shares beneficially owned indirectly through the Ballhaus Trust.

Who is listed as trustee of the Ballhaus Trust in the Form 4 for OSIS?

The footnote states the Ballhaus Trust U/A 1/25/02 with Dr. William Ballhaus Jr. and Jane K. Ballhaus as trustees.

When was the Form 4 signed and filed for the OSIS transactions?

The Form 4 is signed by William Ballhaus on 08/22/2025 for transactions dated 08/20/2025.

Do the transactions indicate a change in control of OSI Systems (OSIS)?

No. The filing shows the director's acquisition and disposition and an indirect holding of 26,162 shares; it does not indicate any change in control.