Mirion Technologies (NYSE: MIR) director reports 350K Class A share sale

Rhea-AI Filing Summary

Mirion Technologies director reports significant share sale

Mirion Technologies, Inc. director Lawrence D. Kingsley reported selling 350,000 shares of the company’s Class A common stock on 12/10/2025. The transaction was coded as a sale at a price of $24.728 per share and was executed through the Lawrence D. Kingsley Revocable Trust.

Following this transaction, the trust beneficially owns 3,509,075 shares of Mirion Technologies indirectly, while an additional 62,137 shares are listed as directly owned. The filing is made on Form 4 by a single reporting person in his capacity as a director of the company.

Insider Trade Summary

Net Seller: 350,000 shares ($8,654,800)

Net Sell 2 txns

Insider Kingsley Lawrence D

Role Director

Sold 350,000 shs ($8.65M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	350,000	$24.728	$8.65M
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 3,509,075 shares (Indirect, By Lawrence D. Kingsley Revocable Trust); Class A Common Stock — 62,137 shares (Direct)

Footnotes (1)

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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^*

Kingsley Lawrence D

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
12/10/2025

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	12/10/2025		S		350,000	D	$24.728	3,509,075	I	By Lawrence D. Kingsley Revocable Trust
Class A Common Stock								62,137	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:

Remarks:

	/s/ Emmanuelle Lee, attorney-in-fact for Lawrence Kingsley	12/12/2025
	** 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 insider transaction did Mirion Technologies (MIR) disclose?

Mirion Technologies disclosed that director Lawrence D. Kingsley sold 350,000 shares of Class A common stock on 12/10/2025 at $24.728 per share.

How many Mirion Technologies (MIR) shares does the director hold after the sale?

After the sale, the Lawrence D. Kingsley Revocable Trust beneficially owns 3,509,075 shares indirectly, and there are an additional 62,137 shares reported as directly owned.

What is the relationship of the reporting person to Mirion Technologies (MIR)?

The reporting person, Lawrence D. Kingsley, is identified as a director of Mirion Technologies, Inc. on the Form 4.

Was the Mirion Technologies (MIR) Form 4 filed for one person or a group?

The Form 4 was indicated as filed by one reporting person, not by a group.

Through what entity were the Mirion Technologies (MIR) shares sold?

The 350,000 shares of Mirion Technologies Class A common stock were sold indirectly through the Lawrence D. Kingsley Revocable Trust.