Emmanuelle Lee - 27 Dec 2025 Form 4 Insider Report for Mirion Technologies, Inc. (MIR)

Role: Chief Legal Officer
Signature: /s/ Emmanuelle Lee
Issuer symbol: MIR
Transactions as of: 27 Dec 2025
Net transactions value: -$140,493
Form type: 4
Filing time: 29 Dec 2025, 16:07:47 UTC
Previous filing: 12 Nov 2025
Next filing: 03 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lee Emmanuelle	Chief Legal Officer	1218 MENLO DR. NW, ATLANTA	/s/ Emmanuelle Lee	29 Dec 2025	0002014061

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MIR	Class A Common Stock	Tax liability	$140,493	-5,913	-7%	$23.76	78,727	27 Dec 2025	Direct	F1
holding	MIR	Class B Common Stock						138,193	27 Dec 2025	Direct
holding	MIR	Class B Common Stock						32,748	27 Dec 2025	By Trust	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.
F2	Reflects shares of Class B Common Stock of the Issuer ("Class B Common Stock") held of record by the Lee Revocable Living Trust (the "Lee Trust") for the benefit of the Reporting Person, the Reporting Person's spouse, and beneficiaries. The Reporting Person and the Reporting Person's spouse are both trustees and beneficiary of the Lee Trust. The Reporting Person disclaims ownership of these shares of Class B Common Stock except to the extent of her pecuniary interest therein.

Content

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.

Reflects shares of Class B Common Stock of the Issuer ("Class B Common Stock") held of record by the Lee Revocable Living Trust (the "Lee Trust") for the benefit of the Reporting Person, the Reporting Person's spouse, and beneficiaries. The Reporting Person and the Reporting Person's spouse are both trustees and beneficiary of the Lee Trust. The Reporting Person disclaims ownership of these shares of Class B Common Stock except to the extent of her pecuniary interest therein.