OSI Systems director uses 88 shares for taxes

OSI SYSTEMS INC (OSIS) director Gerald M. Chizever reported a tax-withholding share disposition related to equity compensation.

Rhea-AI Filing Summary

OSI SYSTEMS INC (OSIS) director Gerald M. Chizever reported a tax-withholding share disposition related to equity compensation. On 2026-08-20, 88 shares of common stock were withheld at $220.92 per share to satisfy tax withholding obligations under a net settlement; the footnote states that no shares were sold into the market. After this transaction, Chizever holds 2,696 shares of OSI Systems common stock directly and 7,751 shares indirectly through The G&C Chizever Family Trust, for which Gerald and Caroline Chizever serve as trustees.

Insider Trade Summary

Tax Withholding: 88 shares

Tax Withholding 2 txns

Insider CHIZEVER GERALD M

Role Director

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	88	$220.92	$19K
holding	Common Stock F2	--	--	--

Holdings After Transaction: Common Stock — 2,696 shares (Direct); Common Stock — 7,751 shares (Indirect, See Footnote)

Footnotes (2)

1. F1. Pursuant with a net settlement, shares of stock were tendered to pay for the tax withholding. No shares of stock were sold.
2. F2. Consists of shares of common stock held by The G&C Chizever Family Trust. Gerald and Caroline Chizever Trustees.

Key Figures

Shares withheld for tax withholding: 88 shares Per-share value for tax withholding: $220.92 per share Direct holdings after transaction: 2,696 shares +2 more

5 metrics

Shares withheld for tax withholding 88 shares Common Stock, code F transaction on 2026-08-20

Per-share value for tax withholding $220.92 per share Value applied to the 88 shares tendered for tax withholding

Direct holdings after transaction 2,696 shares Common Stock held directly by Gerald M. Chizever following the transaction

Indirect holdings after transaction 7,751 shares Common Stock held indirectly via The G&C Chizever Family Trust

Exercise price or tax-liability share count 88 shares Shares used for payment of tax liability as summarized in transactionSummary

Key Terms

net settlement, tax withholding, indirect, Family Trust

4 terms

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.

indirect financial

"total_shares_following_transaction 7751.0000, direct_or_indirect I"

Family Trust financial

"held by The G&C Chizever Family Trust. Gerald and Caroline"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did OSIS director Gerald M. Chizever report on this Form 4?

Gerald M. Chizever reported a Form 4 transaction where 88 OSIS common shares were withheld on 2026-08-20 to pay tax withholding obligations in a net settlement connected to equity compensation.

Were any OSIS shares actually sold by Gerald M. Chizever in this Form 4 filing?

No. A footnote specifies that, pursuant to a net settlement, OSIS shares were tendered to pay tax withholding and that no shares of stock were sold into the market.

At what price were the OSIS shares valued for the tax-withholding transaction?

The 88 OSIS common shares used for tax withholding were valued at $220.92 per share, as reported in the Form 4 for the transaction dated 2026-08-20.

How many OSIS shares does Gerald M. Chizever hold directly after this transaction?

Following the tax-withholding transaction, Gerald M. Chizever directly holds 2,696 shares of OSI Systems common stock, as reported in the post-transaction holdings column.

What are Gerald M. Chizever’s indirect holdings of OSIS shares after this Form 4 event?

The filing reports that 7,751 OSIS common shares are held indirectly through The G&C Chizever Family Trust, with Gerald and Caroline Chizever serving as trustees.

Does this OSIS Form 4 indicate use of a Rule 10b5-1 trading plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not affirmed, and the footnotes describe a tax-withholding net settlement rather than transactions under a pre-arranged trading plan.

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

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Accepted by SEC EDGAR 08/21/2026 - 04:00 PM EDT 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^*

CHIZEVER GERALD M

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026

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	08/20/2026		F		88(1)	D	$220.92	2,696	D
Common Stock								7,751	I	See Footnote(2)

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

2. Consists of shares of common stock held by The G&C Chizever Family Trust. Gerald and Caroline Chizever Trustees.

	/s/ Gerald Chizever	08/21/2026
	** 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)