Mirion CAO gets RSU grant, shares withheld for tax

Mirion Technologies, Inc. Chief Accounting Officer Christopher A. Moore reported two stock transactions involving Class A common stock.

Rhea-AI Filing Summary

Mirion Technologies, Inc. Chief Accounting Officer Christopher A. Moore reported two stock transactions involving Class A common stock. He received a grant of 5,552 restricted stock units that will vest in three equal annual installments starting on March 1, 2027, contingent on continued employment. Separately, 1,397 shares were disposed of at $21.61 per share to satisfy tax withholding obligations upon vesting of previously granted RSUs, with the shares withheld under a pre-established company policy rather than through a discretionary trade. After these transactions, Moore directly held 32,460 shares.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Moore Christopher A.

Role Chief Accounting Officer (PAO)

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	5,552	$0.00	$0.00
Exercise Price or Tax Liability	Class A Common Stock	1,397	$21.61	$30K

Holdings After Transaction: Class A Common Stock — 32,460 shares (Direct)

Footnotes (2)

1. F1. Represents restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date.
2. F2. 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.

FAQ

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

What did Mirion Technologies (MIR) insider Christopher A. Moore report in this Form 4?

Christopher A. Moore reported a grant of 5,552 restricted stock units and a tax-related share disposition of 1,397 Mirion Technologies shares. These transactions reflect equity compensation and automatic tax withholding rather than open-market buying or selling activity.

How many Mirion Technologies (MIR) shares were granted to Christopher A. Moore?

Christopher A. Moore was granted 5,552 restricted stock units of Mirion Technologies Class A common stock. These RSUs represent stock-based compensation that will convert into shares over time if vesting conditions, including continued employment, are satisfied.

When do Christopher A. Moore’s new Mirion Technologies RSUs vest?

The 5,552 restricted stock units vest in three equal annual installments starting March 1, 2027. Each year, one-third of the award is scheduled to vest, subject to Moore’s continued employment with Mirion Technologies through each vesting date.

Why were 1,397 Mirion Technologies (MIR) shares disposed of in this filing?

The 1,397 shares were withheld to satisfy tax withholding obligations from the vesting of previously granted RSUs. This withholding was mandated by a pre-adopted company policy and does not represent a discretionary trade or open-market sale by Christopher A. Moore.

What is Christopher A. Moore’s Mirion Technologies share ownership after these transactions?

Following the reported grant and tax-withholding disposition, Christopher A. Moore directly holds 32,460 shares of Mirion Technologies Class A common stock. This figure reflects his updated ownership position as reported in the Form 4 filing.

What do the transaction codes A and F mean in this Mirion Technologies Form 4?

Code A indicates a grant, award, or other acquisition of securities, here representing RSU-based stock compensation. Code F indicates shares withheld to pay taxes or exercise costs, reflecting a tax-withholding disposition rather than a voluntary market sale.

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

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Accepted by SEC EDGAR 03/03/2026 - 04:12 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^*

Moore Christopher A.

(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 Accounting Officer (PAO)

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

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	03/01/2026		A		5,552(1)	A	$0	33,857	D
Class A Common Stock	03/01/2026		F		1,397(2)	D	$21.61	32,460	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 restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date.

2. 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 Christopher Moore	03/03/2026
	** 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.