Insider trade: MIR CLO sells 12,500 shares under 10b5-1 plan

Rhea-AI Filing Summary

Mirion Technologies (MIR) Chief Legal Officer Emmanuelle Lee reported an open-market sale of 12,500 shares of Class A common stock at $27.4114 on 11/10/2025, executed under a Rule 10b5-1 trading plan adopted on August 11, 2025.

Following the transaction, she beneficially owns 84,640 Class A shares directly. She also holds 138,193 Class B shares directly and 32,748 Class B shares indirectly via the Lee Revocable Living Trust, where she and her spouse serve as trustees and beneficiaries.

Insights

Corporate governance analyst

Routine 10b5-1 insider sale; modest size relative to holdings.

The reporting officer, Mirion’s Chief Legal Officer, sold 12,500 Class A shares at $27.4114 on 11/10/2025 under a pre-set Rule 10b5-1 plan adopted on August 11, 2025. Such plans automate trades and can reduce discretion.

Post-transaction, direct holdings are 84,640 Class A shares, with additional Class B interests: 138,193 direct and 32,748 via a trust. The filing lists ownership forms and does not indicate company cash flows; activity reflects personal portfolio management.

Insider Trade Summary

Net Seller: 12,500 shares ($342,643)

Net Sell 3 txns

Insider Lee Emmanuelle

Role Chief Legal Officer

Sold 12,500 shs ($343K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	12,500	$27.4114	$343K
holding	Class B Common Stock	--	--	--
holding	Class B Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 84,640 shares (Direct); Class B Common Stock — 138,193 shares (Direct); Class B Common Stock — 32,748 shares (Indirect, By Trust)

Footnotes (1)

1. The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2025. 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.

Form 4 Insider Transactions: What Each Field Means →

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^*

Lee Emmanuelle

(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 Legal Officer

3. Date of Earliest Transaction (Month/Day/Year)
11/10/2025

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	11/10/2025		S		12,500	D	$27.4114(1)	84,640	D
Class B Common Stock								138,193	D
Class B Common Stock								32,748	I	By Trust(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. The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2025.

2. 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.

Remarks:

	/s/ Emmanuelle Lee	11/12/2025
	** 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 did MIR’s Chief Legal Officer sell and at what price?

Emmanuelle Lee sold 12,500 Class A shares at $27.4114 on 11/10/2025.

Was the MIR insider trade under a Rule 10b5-1 plan?

Yes. The sale was executed under a Rule 10b5-1 plan adopted on August 11, 2025.

How many MIR Class A shares does the insider hold after the sale?

She beneficially owns 84,640 Class A shares following the transaction.

What Class B holdings does the MIR insider report?

She reports 138,193 Class B shares directly and 32,748 Class B shares indirectly via the Lee Revocable Living Trust.

What is the insider’s role and relationship to MIR?

She is an Officer, serving as Chief Legal Officer of Mirion Technologies.