Mirion Technologies (MIR) insider has 134 shares withheld to cover RSU taxes

Rhea-AI Filing Summary

Mirion Technologies, Inc. Chief Human Resources Officer Alison Ulrich reported an automatic share withholding related to equity compensation. On 12/27/2025, the company withheld 134 shares of Class A common stock at a price of $23.76 per share to cover tax obligations arising from the vesting of previously granted restricted stock units. After this tax withholding, Ulrich beneficially owned 35,096 shares directly. The filing notes that the withholding was mandated by a pre-adopted company policy and did not represent a discretionary trade by the executive.

Insider Trade Summary

Net Seller: 134 shares

Net Sell 1 txn

Insider Ulrich Alison

Role Chief Human Resources Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Class A Common Stock	134	$23.76	$3K

Holdings After Transaction: Class A Common Stock — 35,096 shares (Direct)

Footnotes (1)

1. F1. 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.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 12/29/2025 - 04:07 PM Learn about SEC filing dates

FAQ

What insider transaction did Mirion Technologies (MIR) report in this Form 4?

The filing reports that Chief Human Resources Officer Alison Ulrich had 134 shares of Mirion Class A common stock withheld on 12/27/2025 to satisfy tax obligations from vesting restricted stock units.

At what price were Mirion Technologies (MIR) shares withheld for taxes?

The shares were withheld at a price of $23.76 per share in connection with the tax withholding on vested restricted stock units.

How many Mirion Technologies (MIR) shares does the reporting person own after this transaction?

Following the tax withholding of 134 shares, Chief Human Resources Officer Alison Ulrich beneficially owned 35,096 shares of Mirion Class A common stock directly.

Was the Mirion Technologies (MIR) insider transaction a discretionary trade?

No. The filing explains that the 134 shares were withheld under an issuer policy adopted in advance to satisfy tax withholding obligations and do not represent a discretionary trade by the reporting person.

What triggered the share withholding for the Mirion Technologies (MIR) executive?

The share withholding was triggered by the vesting of restricted stock units (RSUs) previously granted to the reporting person, which created tax obligations satisfied by withholding 134 shares.

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

The reporting person, Alison Ulrich, serves as Mirion Technologies' Chief Human Resources Officer, as indicated in the relationship section of the filing.

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^*

Ulrich Alison

(Last) (First) (Middle)

1218 MENLO DR NW

(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 Human Resources 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		134(1)	D	$23.76	35,096	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 Alison Ulrich	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.