Mirion Technologies (MIR) CFO logs RSU tax share withholding

Rhea-AI Filing Summary

Mirion Technologies, Inc. Chief Financial Officer Brian Schopfer reported an automatic share withholding tied to equity compensation. On 12/27/2025, 8,500 shares of Class A common stock were withheld by the company to cover tax obligations arising from the vesting of previously granted restricted stock units. The filing notes this withholding was mandated under a pre-adopted company policy and did not involve a discretionary trade by the executive.

Following this transaction, Schopfer beneficially owned 893,432 shares of Class A common stock and 399,935 shares of Class B common stock, all held directly.

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

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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^*

Schopfer Brian

(Last) (First) (Middle)

1218 MENLO DRIVE

(Street)

ATLANTA GA 30318

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Mirion Technologies, Inc. [ MIR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

3. Date of Earliest Transaction (Month/Day/Year)
12/27/2025

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
Class A Common Stock	12/27/2025		F		8,500(1)	D	$23.76	893,432	D
Class B Common Stock								399,935	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. Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in advance and does not represent a discretionary trade by the Reporting Person.

Remarks:

	/s/ Emmanuelle Lee, attorney-in-fact for Brian Schopfer	12/29/2025
	** 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 insider transaction did Mirion Technologies (MIR) disclose in this filing?

The filing reports that Chief Financial Officer Brian Schopfer had 8,500 Class A shares withheld on 12/27/2025 to satisfy tax obligations from vesting restricted stock units.

Was the Mirion Technologies (MIR) CFO’s transaction a discretionary sale?

No. The filing explains the 8,500-share withholding was mandated by an issuer policy adopted in advance and does not represent a discretionary trade by the reporting person.

How many Mirion Technologies (MIR) Class A shares does the CFO own after this transaction?

After the reported transaction, CFO Brian Schopfer beneficially owned 893,432 shares of Class A common stock, held directly.

How many Mirion Technologies (MIR) Class B shares does the CFO own?

The filing shows that Brian Schopfer beneficially owned 399,935 shares of Class B common stock, held directly.

What was the reported price for the withheld Mirion Technologies (MIR) shares?

The 8,500 Class A shares withheld for taxes were reported at a price of $23.76 per share.

What role does the reporting person hold at Mirion Technologies (MIR)?

The reporting person, Brian Schopfer, is identified as an Officer, serving as Chief Financial Officer of Mirion Technologies, Inc.