MIR Form 144: UBS-placed 500,000 Mirion shares; sale planned 08/11/2025

Rhea-AI Filing Summary

Mirion Technologies (MIR) filed a Form 144 disclosing a proposed sale of 500,000 Class A common shares through UBS Financial Services, with an aggregate market value of $10,655,000 and an approximate sale date of 08/11/2025. The filing lists total Class A shares outstanding of 224,440,000, so the proposed sale equals roughly 0.22% of outstanding Class A stock. The 500,000 shares were acquired entirely via company equity awards (PSU and RSU grants) on dates between 12/27/2023 and 05/14/2025, and the acquisition table entries sum to 500,000 shares. The filer reports Nothing to Report for securities sold in the past three months and includes the standard representation regarding undisclosed material adverse information.

Positive

• The filing discloses full acquisition details showing the 500,000 shares were acquired entirely through company PSU and RSU grants with specific dates and amounts that sum to the total being offered.
• The notice names the broker (UBS Financial Services) and states the aggregate market value $10,655,000, providing clear transaction context.

Negative

• A proposed sale of 500,000 Class A shares is disclosed, representing approximately 0.22% of the 224,440,000 Class A shares outstanding and an aggregate value of $10,655,000.
• Although no sales were reported in the past three months, the filing indicates a concentrated single transaction that will enter the market on or about 08/11/2025.

Insights

Financial Analyst

TL;DR: Form 144 discloses a planned sale of 500,000 Mirion Class A shares ($10.655M) acquired via company PSU/RSU grants.

The filing is detailed and transparent: it identifies the broker (UBS Financial Services), shows the aggregate market value ($10,655,000), and lists acquisition dates and grant amounts that total the 500,000 shares being offered. With 224,440,000 Class A shares outstanding, the sale represents roughly 0.22% of outstanding stock, a small percentage in absolute terms. There are no reported sales in the past three months, and the filing includes the seller's standard representation about undisclosed material adverse information.

Corporate Governance Expert

TL;DR: The disclosure shows an equity-award-based holding being offered, with full acquisition detail and a scheduled brokered sale.

The submission documents that all 500,000 shares originated from PSU/RSU grants granted between 12/27/2023 and 05/14/2025, which supports traceability of the position and compliance with Rule 144 disclosure requirements. The use of a major broker (UBS) and the explicit listing of aggregate market value ($10,655,000) enhance transparency for shareholders. No prior three-month sales are reported, which helps contextualize this single proposed transaction.

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

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 Stock	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	500000	10655000	224440000	08/11/2025	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 Stock	05/14/2025	PSU Grant	Company			123804	05/14/2025	N/A
Class A Common Stock	02/25/2025	PSU Grant	Company			102984	02/25/2025	N/A
Class A Common Stock	04/01/2025	RSU Grant	Company			43106	04/01/2025	N/A
Class A Common Stock	12/27/2024	RSU Grant	Company			54833	12/27/2024	N/A
Class A Common Stock	03/01/2025	RSU Grant	Company			31665	03/01/2025	N/A
Class A Common Stock	04/01/2024	RSU Grant	Company			31824	04/01/2024	N/A
Class A Common Stock	12/27/2023	RSU Grant	Compny			36456	12/27/2023	N/A
Class A Common Stock	04/01/2024	RSU Grant	Company			33001	04/01/2024	N/A
Class A Common Stock	04/01/2024	RSU Grant	Company			42327	04/01/2024	N/A

* 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

Nothing to Report

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 did Mirion (MIR) disclose in the Form 144?

The Form 144 discloses a proposed sale of 500,000 Class A shares through UBS Financial Services with an aggregate market value of $10,655,000.

When is the proposed sale scheduled for Mirion shares?

The filing lists an approximate sale date of 08/11/2025.

How were the 500,000 Mirion shares acquired?

All shares were acquired via company equity awards: multiple PSU and RSU grants dated between 12/27/2023 and 05/14/2025, which together total 500,000 shares.

Does the Form 144 report any Mirion securities sold in the last three months?

The filing states Nothing to Report for securities sold during the past three months.

How large is this proposed sale relative to Mirion's outstanding Class A shares?

The proposed 500,000‑share sale equals about 0.22% of the reported 224,440,000 Class A shares outstanding.