Mirion Technologies (MIR) holder files Rule 144 to sell 350,000 shares

Rhea-AI Filing Summary

Mirion Technologies (MIR) has a shareholder filing a notice of proposed sale under Rule 144 for up to 350,000 shares of Class A common stock. The planned sale is through UBS Financial Services on the NYSE, with an indicated aggregate market value of $8,750,000 and occurs against 245,000,000 shares outstanding of this class.

The securities to be sold were originally acquired on 11/05/2024 in a private transaction from the issuer totaling 3,150,000 shares. Over the past three months, the Lawrence D Kingsley Revocable Trust sold 300,000 Class A shares on 11/21/2025 for gross proceeds of $7,148,400, and this new notice outlines additional planned sales from that holding.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A Common	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	350000	8750000	245000000	12/10/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A Common	11/05/2024	Private	Issuer			3150000	11/05/2024	NA

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Lawrence D Kingsley Revocable Trust TTEE Lawrence D Kingsley dtd 3/20/06 156 Winhall Rd. Apt. B Bondville VT 05340-9760	Class A Common	11/21/2025	300000	7148400

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Mirion Technologies (MIR) Form 144 disclose?

It discloses a shareholder’s intent to sell up to 350,000 shares of Mirion Technologies Class A common stock on the NYSE through UBS Financial Services, with an aggregate market value of $8,750,000.

How many Mirion Technologies (MIR) shares are outstanding in this class?

The notice states that 245,000,000 shares of Mirion Technologies Class A common stock are outstanding.

When and how were the Mirion Technologies (MIR) shares to be sold originally acquired?

The shares were acquired on 11/05/2024 in a private transaction from the issuer, with a total of 3,150,000 Class A shares acquired on that date.

What prior Mirion Technologies (MIR) share sales are reported for the last three months?

The Lawrence D Kingsley Revocable Trust sold 300,000 Class A shares on 11/21/2025, generating gross proceeds of $7,148,400.

Which broker and exchange will be used for the Mirion Technologies (MIR) share sale?

The proposed sale of 350,000 Class A shares will be executed through UBS Financial Services Inc. on the NYSE.

What type of security is being sold for Mirion Technologies (MIR)?

The security is Class A common stock of Mirion Technologies, to be sold under a Rule 144 notice.