Vanguard discloses passive 30,418,327-share MIR position (12.45%)

Rhea-AI Filing Summary

The Vanguard Group filed Amendment No. 3 to Schedule 13G reporting passive ownership in Mirion Technologies (MIR). Vanguard reports beneficial ownership of 30,418,327 shares of common stock, representing 12.45% of the class as of the event date 09/30/2025.

Vanguard reports 0 shares with sole voting power and 1,646,311 shares with shared voting power. It has 28,513,549 shares with sole dispositive power and 1,904,778 shares with shared dispositive power. Vanguard files as an investment adviser and certifies the securities were acquired and held in the ordinary course, not to change or influence control. Vanguard’s clients have rights to dividends or sale proceeds tied to these shares, and no single other person’s interest exceeds 5%.

Insights

Equity ownership & disclosure analyst

Vanguard discloses a passive 12.45% MIR stake via Schedule 13G.

The Vanguard Group reports beneficial ownership of 30,418,327 Mirion shares, equal to 12.45% of the class. The filing shows 0 shares with sole voting power and 1,646,311 with shared voting power, reflecting index and advisory structures that centralize disposition authority while distributing voting among affiliates.

The certification states holdings were acquired and are held in the ordinary course and not to influence control, consistent with a Schedule 13G passive filer. Clients retain economic rights to dividends and sale proceeds, with no single other person over 5%.

Any market impact depends on future portfolio flows and client activity; the document provides a snapshot as of 09/30/2025 without indicating transaction timing or intent beyond passive ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Mirion Technologies Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

60471A101

(CUSIP Number)

09/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 60471A101

1

Names of Reporting Persons

The Vanguard Group

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,646,311.00
7	Sole Dispositive Power 28,513,549.00
8	Shared Dispositive Power 1,904,778.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

30,418,327.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

12.45 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Mirion Technologies Inc
(b)	Address of issuer's principal executive offices: 1218 Menlo Drive, Atlanta, GA, 30318
Item 2.
(a)	Name of person filing: The Vanguard Group
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd., Malvern, PA 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 60471A101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 30418327
(b)	Percent of class: 12.45 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 1646311
	(iii) Sole power to dispose or to direct the disposition of: 28513549
	(iv) Shared power to dispose or to direct the disposition of: 1904778
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Vanguard Group, Inc.'s clients, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein. No one other person's interest in the securities reported herein is more than 5%.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

The Vanguard Group

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	10/31/2025

FAQ

What percentage of Mirion Technologies (MIR) does The Vanguard Group report owning?

The Vanguard Group reports beneficial ownership of 12.45% of Mirion’s common stock.

How many MIR shares does Vanguard report as beneficially owned?

Vanguard reports 30,418,327 shares of Mirion common stock as beneficially owned.

What voting and dispositive powers does Vanguard report for MIR?

Vanguard reports 0 sole voting, 1,646,311 shared voting, 28,513,549 sole dispositive, and 1,904,778 shared dispositive shares.

What is the event date for Vanguard’s MIR ownership report?

The event date is 09/30/2025.

Is Vanguard’s MIR position passive or for control?

Vanguard certifies the shares were acquired and are held in the ordinary course and not to change or influence control.

Who has economic rights to the MIR shares managed by Vanguard?

Vanguard’s clients, including registered funds and other accounts, have rights to dividends or sale proceeds; no single other person exceeds 5%.