Director at OSI Systems (NASDAQ: OSIS) receives 924-share stock grant

Rhea-AI Filing Summary

Ballhaus William Francis JR reported acquisition or exercise transactions in this Form 4 filing.

OSI Systems Inc. director William Francis Ballhaus Jr. received a grant of 924 shares of common stock on July 20, 2026 at $216.65 per share. After this award, he holds 4,102 shares directly and 25,373 shares indirectly through the Ballhaus Trust U/A 1/25/02.

Insider Trade Summary

Net Buyer: 924 shares

Net Buy 2 txns

Insider Ballhaus William Francis JR

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	924	$216.65	$200K
holding	Common Stock F1	--	--	--

Holdings After Transaction: Common Stock — 4,102 shares (Direct); Common Stock — 25,373 shares (Indirect, Ballhaus Trust - See Footnote)

Footnotes (1)

1. F1. Ballhaus Trust U/A 1/25/02 Dr. William Ballhaus Jr. and Jane K Ballhaus Trustees.

Key Figures

Shares granted: 924 shares Grant price: $216.65 per share Direct holdings after grant: 4,102 shares +1 more

4 metrics

Shares granted 924 shares Grant, award, or other acquisition of Common Stock on 2026-07-20

Grant price $216.65 per share Value assigned to the 924-share stock grant on 2026-07-20

Direct holdings after grant 4,102 shares Common Stock directly owned by William Francis Ballhaus Jr. following the award

Indirect holdings via trust 25,373 shares Common Stock indirectly owned through the Ballhaus Trust U/A 1/25/02

Key Terms

Grant, award, or other acquisition, indirect, Ballhaus Trust U/A 1/25/02

3 terms

Grant, award, or other acquisition financial

"Transaction code description: Grant, award, or other acquisition"

indirect financial

"total_shares_following_transaction 25373.0000, ownership_type indirect"

Ballhaus Trust U/A 1/25/02 financial

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/21/2026 - 04:00 PM Accepted by SEC EDGAR 07/21/2026 - 04:00 PM Learn about SEC filing dates

FAQ

What insider transaction did OSI Systems (OSIS) report for William Francis Ballhaus Jr.?

Director William Francis Ballhaus Jr. received a grant of 924 shares of OSI Systems common stock at $216.65 per share. After this equity award, he directly owns 4,102 shares and indirectly reports 25,373 shares held through the Ballhaus Trust.

On what date did the OSI Systems (OSIS) director stock grant occur and at what price?

The stock grant to director William Francis Ballhaus Jr. occurred on July 20, 2026 at a value of $216.65 per share. The transaction is classified as a grant, award, or other acquisition of common stock rather than an open-market purchase or sale.

How many OSI Systems (OSIS) shares does William Francis Ballhaus Jr. now hold directly?

Following the July 20, 2026 grant, William Francis Ballhaus Jr. directly holds 4,102 shares of OSI Systems common stock. This figure reflects his direct ownership position after receiving the 924-share equity award reported in the insider transaction filing.

What indirect OSI Systems (OSIS) holdings are reported for William Francis Ballhaus Jr.?

He reports 25,373 shares of OSI Systems common stock as indirectly owned through the “Ballhaus Trust U/A 1/25/02,” with Dr. William Ballhaus Jr. and Jane K. Ballhaus as trustees. This trust position is disclosed separately from his direct shareholdings.

Was the OSI Systems (OSIS) insider transaction a buy or a grant?

The activity is reported as a grant, award, or other acquisition of 924 common shares, not a market purchase. The transaction code is classified as “A”, indicating an equity award to the director rather than a discretionary open-market trade.

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 CALIFORNIA 90250

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/20/2026

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

X	Form filed by One Reporting Person
	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	07/20/2026		A		924	A	$216.65	4,102	D
Common Stock								25,373	I	Ballhaus Trust - See Footnote(1)

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	07/21/2026
	** 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)