Mirion Technologies (MIR) CEO reports stock grant, tax withholdings and large share gift

Rhea-AI Filing Summary

Mirion Technologies, Inc. Chief Executive Officer Thomas D. Logan reported multiple equity transactions in Class A Common Stock. He received a grant or award of 318,632 shares at $0.00 per share, tied to the settlement of previously granted performance-based restricted stock units.

To satisfy tax withholding obligations on vesting RSUs and PSUs under a pre-adopted company policy, the issuer withheld 127,184 shares and 20,650 shares at $21.61 per share; these withholdings are not discretionary trades by Logan. He also made a bona fide gift of 3,093,812 shares to the Logan Family Trust for no consideration.

Following these transactions, Logan directly owns 386,674 shares of Class A Common Stock and holds additional shares indirectly through the Logan Family Trust, which is reported with 3,205,378 shares of indirect ownership.

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

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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^*

Logan Thomas 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
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

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		F		20,650(1)	D	$21.61	3,289,038	D
Class A Common Stock	03/02/2026		A		318,632(2)	A	$0	3,607,670	D
Class A Common Stock	03/02/2026		F		127,184(3)	D	$21.61	3,480,486	D
Class A Common Stock	03/02/2026		G		3,093,812(4)	D	$0	386,674	D
Class A Common Stock								3,205,378	I	Logan Family Trust

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.

2. Represents the settlement of certain performance-based restricted stock units ("PSU") previously granted on December 31, 2023, based on the achievement of specified performance goals as determined by the Issuer's compensation committee of its board of directors.

3. Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of the PSUs 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.

4. On March 2, 2026, the Reporting Person made a gift of 3,093,812 shares of Class A Common Stock to the Logan Family Trust. The Reporting Person received no consideration for the gift.

Remarks:

	/s/ Emmanuelle Lee, attorney-in-fact for Thomas D. Logan	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).
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FAQ

What insider transactions did Mirion Technologies (MIR) CEO Thomas Logan report?

Thomas D. Logan reported an equity grant, tax-withholding share dispositions, and a large share gift. He received 318,632 Class A shares, had shares withheld to cover taxes, and gifted 3,093,812 shares of Class A Common Stock to the Logan Family Trust.

How many Mirion Technologies (MIR) shares were granted to the CEO in this Form 4?

Thomas D. Logan received a grant of 318,632 shares of Mirion Class A Common Stock at $0.00 per share. The grant reflects settlement of performance-based restricted stock units previously awarded based on specified performance goals determined by Mirion’s compensation committee.

Were any Mirion Technologies (MIR) CEO share dispositions open-market sales?

The reported dispositions were not open-market sales. Mirion withheld 127,184 and 20,650 shares at $21.61 per share to satisfy tax obligations on vesting awards under a pre-adopted policy, and Logan made a bona fide gift of 3,093,812 shares to the Logan Family Trust.

What is the size and nature of the Mirion (MIR) CEO’s gift to the Logan Family Trust?

On March 2, 2026, Thomas D. Logan gifted 3,093,812 shares of Mirion Class A Common Stock to the Logan Family Trust. The filing states he received no consideration for this bona fide gift, effectively transferring a large block of shares to the trust.

How many Mirion Technologies (MIR) shares does the CEO own after these transactions?

After the reported transactions, Thomas D. Logan directly owns 386,674 shares of Mirion Class A Common Stock. He also reports indirect ownership of 3,205,378 shares held through the Logan Family Trust, reflecting both direct and trust-related positions in the company.

What price per share was used for Mirion (MIR) tax-withholding share dispositions?

For the tax-withholding share dispositions, Mirion used a price of $21.61 per share. At this price, 127,184 shares and 20,650 shares were withheld to satisfy tax obligations arising from the vesting of restricted stock units and performance-based restricted stock units.