Mirion (MIR) director takes quarterly board retainer in company stock

Rhea-AI Filing Summary

Kingsley Lawrence D reported acquisition or exercise transactions in this Form 4 filing.

Mirion Technologies director Lawrence D. Kingsley reported a stock grant of 1,095 shares of Class A Common Stock, valued at $17.46 per share. The shares were issued as his quarterly director retainer, which he elected to receive in vested stock instead of cash. Following this grant, he directly holds 72,525 shares. He also reports indirect holdings of 3,191,075 shares through the Lawrence D. Kingsley Revocable Trust and 159,000 shares each through the Lawrence D. Kingsley 2026 GRAT I and 2026 GRAT II.

Insider Trade Summary

4 transactions reported

Mixed 4 txns

Insider Kingsley Lawrence D

Role null

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	1,095	$17.46	$19K
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 72,525 shares (Direct, null); Class A Common Stock — 159,000 shares (Indirect, Lawrence D. Kingsley 2026 GRAT I)

Footnotes (1)

1. [object Object]

Key Figures

Director stock grant: 1,095 shares Grant price: $17.46 per share Direct holdings after grant: 72,525 shares +3 more

6 metrics

Director stock grant 1,095 shares Quarterly retainer paid in vested shares

Grant price $17.46 per share Value used for the 1,095-share retainer grant

Direct holdings after grant 72,525 shares Class A Common Stock held directly by Kingsley

Revocable trust holdings 3,191,075 shares Held by Lawrence D. Kingsley Revocable Trust

GRAT II holdings 159,000 shares Held by Lawrence D. Kingsley 2026 GRAT II

GRAT I holdings 159,000 shares Held by Lawrence D. Kingsley 2026 GRAT I

Key Terms

Grant, award, or other acquisition, quarterly retainer, revocable trust, GRAT

4 terms

Grant, award, or other acquisition financial

"transaction code description shows "Grant, award, or other acquisition""

quarterly retainer financial

"election to receive his or her quarterly retainer for director services"

revocable trust financial

"By Lawrence D. Kingsley Revocable Trust"

A revocable trust is a legal arrangement where the person who creates it keeps control and can change or cancel the trust at any time, while naming who will manage and receive the assets later. Think of it like a flexible folder for your investments and property that can be relabeled or reworked as circumstances change; it matters to investors because it determines how ownership is recorded, how easily assets transfer on incapacity or death, and whether holdings bypass public probate proceedings.

GRAT financial

"Lawrence D. Kingsley 2026 GRAT II"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/30/2026 - 04:25 PM Accepted by SEC EDGAR 06/30/2026 - 04:24 PM Learn about SEC filing dates

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 GEORGIA 30318

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	06/30/2026		A		1,095(1)	A	$17.46	72,525	D
Class A Common Stock								159,000	I	Lawrence D. Kingsley 2026 GRAT I
Class A Common Stock								159,000	I	Lawrence D. Kingsley 2026 GRAT II
Class A Common Stock								3,191,075	I	By Lawrence D. Kingsley Revocable 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. These shares were issued in connection with the Reporting Person's election to receive his or her quarterly retainer for director services in the form of vested shares rather than cash.

Remarks:

	/s/ Emmanuelle Lee, attorney-in-fact for Lawrence Kingsley	06/30/2026
	** 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).
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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Mirion (MIR) director Lawrence D. Kingsley report on this Form 4?

Lawrence D. Kingsley reported receiving 1,095 Mirion Class A shares as a grant. The grant represents his quarterly director retainer, which he chose to take in vested stock instead of cash, increasing his directly held shares to 72,525.

What is the value of the Mirion shares granted to director Lawrence D. Kingsley?

Kingsley received 1,095 Mirion Class A shares at $17.46 per share. The filing describes this as a grant in lieu of a cash quarterly director retainer, meaning it is compensation-related rather than an open-market purchase or sale of stock.

How many Mirion shares does Lawrence D. Kingsley hold directly after this filing?

After the reported grant, Kingsley directly holds 72,525 Mirion Class A Common shares. This direct position sits alongside significant indirect holdings reported through a revocable trust and two 2026 GRAT vehicles that together account for several million additional shares.

What indirect Mirion (MIR) holdings are reported for Lawrence D. Kingsley?

The filing shows 3,191,075 Mirion Class A shares held through the Lawrence D. Kingsley Revocable Trust. It also reports 159,000 shares in the Lawrence D. Kingsley 2026 GRAT I and another 159,000 shares in the Lawrence D. Kingsley 2026 GRAT II, all as indirect ownership.

Was the Mirion share transaction by Lawrence D. Kingsley an open-market trade?

No, the 1,095-share entry is coded as a grant or award, not a market trade. A footnote explains the shares were issued because Kingsley elected to receive his quarterly director retainer in vested stock instead of cash, a routine compensation choice.