Mirion (MIR) Chief Accounting Officer sells 8,400 shares at $19.64

Rhea-AI Filing Summary

Mirion Technologies, Inc. Chief Accounting Officer Christopher A. Moore reported an open-market sale of company stock. On May 7, 2026, he sold 8,400 shares of Mirion Class A Common Stock at an average price of $19.64 per share.

After this transaction, Moore directly holds 22,157 shares of Mirion stock. This filing records a single sale transaction and does not show any accompanying option exercises, gifts, or tax-withholding events.

Insider Trade Summary

Net Seller: 8,400 shares ($164,976)

Net Sell 1 txn

Insider Moore Christopher A.

Role Chief Accounting Officer (PAO)

Sold 8,400 shs ($165K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	8,400	$19.64	$165K

Holdings After Transaction: Class A Common Stock — 22,157 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 8,400 shares Sale price per share: $19.64 per share Shares owned after transaction: 22,157 shares +1 more

4 metrics

Shares sold 8,400 shares Open-market sale on May 7, 2026

Sale price per share $19.64 per share Average price for the 8,400 shares sold

Shares owned after transaction 22,157 shares Direct holdings following the reported sale

Net share change -8,400 shares Net-sell direction from the reported transaction

Key Terms

Class A Common Stock, open-market sale, non-derivative

3 terms

Class A Common Stock financial

"security_title: "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"transaction_type: "non-derivative""

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^*

Moore Christopher A.

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

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	05/07/2026		S		8,400	D	$19.64	22,157	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 Christopher Moore	05/08/2026
	** 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 insider transaction did Mirion Technologies (MIR) report for Christopher A. Moore?

Mirion’s Chief Accounting Officer Christopher A. Moore reported an open-market sale of company stock. He sold 8,400 shares of Mirion Class A Common Stock at an average price of $19.64 per share, as disclosed in the Form 4 insider transaction filing.

How many Mirion (MIR) shares did Christopher A. Moore sell and at what price?

Christopher A. Moore sold 8,400 shares of Mirion Class A Common Stock. The reported average sale price was $19.64 per share in an open-market transaction, according to the Form 4 filed for the May 7, 2026 transaction date.

How many Mirion (MIR) shares does Christopher A. Moore hold after this Form 4 sale?

Following the reported sale, Christopher A. Moore directly holds 22,157 shares of Mirion Class A Common Stock. This post-transaction holding figure comes from the Form 4 and reflects only the position shown in this specific filing.

Was the Mirion (MIR) insider transaction by Christopher A. Moore a purchase or sale?

The transaction was a sale. The Form 4 lists transaction code “S” and describes it as an open-market sale, with 8,400 Mirion Class A Common Stock shares sold at an average price of $19.64 per share on May 7, 2026.

Did the Mirion (MIR) Form 4 for Christopher A. Moore include any option exercises or derivative trades?

The Form 4 shows no derivative transactions or option exercises. It reports only one non-derivative transaction: an open-market sale of 8,400 shares of Mirion Class A Common Stock, leaving Moore with 22,157 directly owned shares afterward.