OSI Systems HR chief granted 1,969 RSUs at $207

Rhea-AI Filing Summary

OSI SYSTEMS INC (OSIS) reported that Chief Human Resources Officer Glenn Grindstaff received an award of 1,969 shares of common stock on August 24, 2026 at a reference value of $206.73 per share, issued as RSUs with performance-based vesting. On the same date, 1,708 shares were disposed of under a net settlement to cover tax withholding, with the company stating that no shares were sold in the market.

Insider Trade Summary

Net Buyer: 261 shares

Net Buy 2 txns

Insider Grindstaff Glenn

Role CHIEF HUMAN RESOURCES OFFICER

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	1,969	$206.73	$407K
Tax Withholding	Common Stock F2	1,708	$206.73	$353K

Holdings After Transaction: Common Stock — 10,193 shares (Direct)

Footnotes (2)

1. F1. RSUs are issued pursuant to performance based vesting.
2. F2. Pursuant with a net settlement, shares of stock were tendered to pay for the tax withholding. No shares of stock were sold.

Key Figures

RSU award shares: 1,969 shares of Common Stock RSU reference price: $206.73 per share Shares for tax withholding: 1,708 shares of Common Stock +1 more

4 metrics

RSU award shares 1,969 shares of Common Stock Grant/award acquisition on August 24, 2026

RSU reference price $206.73 per share Value associated with 1,969-share award on August 24, 2026

Shares for tax withholding 1,708 shares of Common Stock Net settlement to pay tax withholding on August 24, 2026

Code F tax-liability shares 1,708 shares Payment of tax liability by delivering or withholding securities

Key Terms

RSUs, performance based vesting, net settlement, tax withholding

4 terms

RSUs financial

"RSUs are issued pursuant to performance based vesting."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

performance based vesting financial

"RSUs are issued pursuant to performance based vesting."

net settlement financial

"Pursuant with a net settlement, shares of stock were tendered"

tax withholding financial

"shares of stock were tendered to pay for the tax withholding."

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

FAQ

What insider equity award did OSIS report for Glenn Grindstaff?

OSI SYSTEMS INC reported that Glenn Grindstaff received a grant of 1,969 shares of common stock on August 24, 2026, at a reference value of $206.73 per share, issued as RSUs pursuant to performance-based vesting.

How many OSIS shares were used to cover taxes on Glenn Grindstaff’s award?

On August 24, 2026, 1,708 shares of OSI SYSTEMS INC common stock were disposed of in a net settlement to pay tax withholding related to the award. The company states that no shares were sold in the market.

Was Glenn Grindstaff’s OSIS equity transaction a market sale or a tax withholding?

The disposition of 1,708 OSIS shares on August 24, 2026 was described as part of a net settlement where shares were tendered to pay tax withholding. The company specifically notes that no shares of stock were sold.

What type of equity instrument did OSIS grant to Glenn Grindstaff?

OSI SYSTEMS INC granted Glenn Grindstaff restricted stock units (RSUs) representing 1,969 shares of common stock. The footnote states that these RSUs are issued pursuant to performance-based vesting criteria.

Does the Form 4 indicate Glenn Grindstaff used a Rule 10b5-1 plan for these OSIS transactions?

The filing indicates the Rule 10b5-1 checkbox is not affirmed (aff_10b5_one is false), and no footnote states that the August 24, 2026 award or tax-withholding disposition occurred under a pre-arranged trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/25/2026 - 07:58 PM Accepted by SEC EDGAR 08/25/2026 - 07:57 PM Learn about SEC filing dates

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^*

Grindstaff Glenn

(Last) (First) (Middle)

12525 CHADRON AVENUE

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF HUMAN RESOURCES OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/24/2026

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	08/24/2026		A		1,969(1)	A	$206.73	11,901	D
Common Stock	08/24/2026		F		1,708(2)	D	$206.73	10,193	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. RSUs are issued pursuant to performance based vesting.

2. Pursuant with a net settlement, shares of stock were tendered to pay for the tax withholding. No shares of stock were sold.

	/s/ Glenn Grindstaff	08/25/2026
	** 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)