Mirion Technologies, Inc. (MIR)

Data as of Sep 30, 2026, from SEC Form 4 filings.

Net insider buying (90d)Watch MIR

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Latest MIR insider trades

Brian Schopfer - Officer
Open-market purchase$312K
Sep 2, 2026
Christopher A. Moore - Officer
Open-market sale$165K
May 7, 2026

About Mirion Technologies, Inc. (MIR)

Mirion Technologies, Inc. is an SEC registrant, filing under CIK 0001809987, classified as measuring and controlling devices, nec. We track it alongside the rest of the Information Technology sector.

Sector: Information Technology

SEC filings for MIR on EDGAR

MIR Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Open-market purchase	1	20,000	$312K
Grant or award	2	2,666

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

MIR insider transactions (Form 4)

54 Form 4 filings on record, the earliest from Oct 28, 2024, newest first. Filing history page 1 of 2.

Date	Insider	Transaction	Security	Shares	Price	Value
Sep 30, 2026	Lawrence D. Kingsley - Director	Grant or award	Class A Common Stock	1,333^{footnote F1}	$14.34	$19K
Footnote F1 (shares): 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.
Sep 30, 2026	Jody Markopoulos - Director	Grant or award	Class A Common Stock	1,333^{footnote F1}	$14.34	$19K
Footnote F1 (shares): 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.
Sep 2, 2026	Brian Schopfer - Officer	Open-market purchase	Class A Common Stock	20,000	$15.60	$312K
Jun 30, 2026	Lawrence D. Kingsley - Director	Grant or award	Class A Common Stock	1,095^{footnote F1}	$17.46	$19K
Footnote F1 (shares): 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.
May 13, 2026	Lawrence D. Kingsley - Director	Grant or award	Class A Common Stock	7,383^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR
May 13, 2026	Kenneth Bockhorst - Director	Grant or award	Class A Common Stock	7,383^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR
May 13, 2026	Robert Cascella - Director	Grant or award	Class A Common Stock	7,383^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR
May 13, 2026	Steven W. Etzel - Director	Grant or award	Class A Common Stock	7,383^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR
May 13, 2026	John W. Kuo - Director	Grant or award	Class A Common Stock	7,383^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR
May 13, 2026	Jody Markopoulos - Director	Grant or award	Class A Common Stock	7,383^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR
May 13, 2026	Sheila Rege - Director	Grant or award	Class A Common Stock	7,383^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR
May 7, 2026	Christopher A. Moore - Officer	Open-market sale	Class A Common Stock	8,400	$19.64	$165K
May 6, 2026	Thomas D. Logan - Officer	Gift	Class A Common Stock	311,851^{footnote F1}	$0.00	-
Footnote F1 (shares): On May 6, 2026, the Reporting Person made a gift of 311,851 shares of Class A Common Stock to the Logan Family Trust. The Reporting Person received no consideration for this gift.
Apr 1, 2026	Alison Ulrich - Officer	Tax withholding / forfeiture	Class A Common Stock	2,053^{footnote F1}	$18.59	$38K
Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Apr 1, 2026	Brian Schopfer - Officer	Tax withholding / forfeiture	Class A Common Stock	7,377^{footnote F1}	$18.59	$137K
Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Apr 1, 2026	Christopher A. Moore - Officer	Tax withholding / forfeiture	Class A Common Stock	1,903^{footnote F1}	$18.59	$35K
Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Apr 1, 2026	Thomas D. Logan - Officer	Tax withholding / forfeiture	Class A Common Stock	22,614^{footnote F1}	$18.59	$420K
Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Apr 1, 2026	Emmanuelle Lee - Officer	Tax withholding / forfeiture	Class A Common Stock	4,680^{footnote F1}	$18.59	$87K
Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Mar 31, 2026	Lawrence D. Kingsley - Director	Grant or award	Class A Common Stock	1,104^{footnote F1}	$17.32	$19K
Footnote F1 (shares): 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.
Mar 2, 2026	Loic Eloy - Officer	Grant or award	Class A Common Stock	15,577^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents the settlement of certain performance-based restricted stock units ("PSU") previously granted on December 31, 2023, based on the achievement of specified performance goals as determined by the Issuer's compensation committee of its board of directors.
Mar 1, 2026	Brian Schopfer - Officer	Tax withholding / forfeiture	Class A Common Stock	9,172^{footnote F1}	$21.61	$198K
Mar 2, 2026	Brian Schopfer - Officer	Grant or award	Class A Common Stock	64,906^{footnote F2}	$0.00	-
Mar 2, 2026	Brian Schopfer - Officer	Tax withholding / forfeiture	Class A Common Stock	28,499^{footnote F3}	$21.61	$616K
Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR Footnote F2 (shares): Represents the settlement of certain performance-based restricted stock units ("PSU") previously granted on December 31, 2023, based on the achievement of specified performance goals as determined by the Issuer's compensation committee of its board of directors. Footnote F3 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of the PSUs previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in advance and does not… Full note on SEC EDGAR
Mar 1, 2026	Alison Ulrich - Officer	Grant or award	Class A Common Stock	5,552^{footnote F1}	$0.00	-
Mar 1, 2026	Alison Ulrich - Officer	Tax withholding / forfeiture	Class A Common Stock	2,360^{footnote F2}	$21.61	$51K
Footnote F1 (shares): Represents restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date. Footnote F2 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Mar 1, 2026	Christopher A. Moore - Officer	Grant or award	Class A Common Stock	5,552^{footnote F1}	$0.00	-
Mar 1, 2026	Christopher A. Moore - Officer	Tax withholding / forfeiture	Class A Common Stock	1,397^{footnote F2}	$21.61	$30K
Footnote F1 (shares): Represents restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date. Footnote F2 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Mar 1, 2026	Emmanuelle Lee - Officer	Grant or award	Class A Common Stock	11,568^{footnote F1}	$0.00	-
Mar 1, 2026	Emmanuelle Lee - Officer	Tax withholding / forfeiture	Class A Common Stock	3,184^{footnote F2}	$21.61	$69K
Footnote F1 (shares): Represents restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date. Footnote F2 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Mar 1, 2026	Thomas D. Logan - Officer	Tax withholding / forfeiture	Class A Common Stock	20,650^{footnote F1}	$21.61	$446K
Mar 2, 2026	Thomas D. Logan - Officer	Grant or award	Class A Common Stock	318,632^{footnote F2}	$0.00	-
Mar 2, 2026	Thomas D. Logan - Officer	Tax withholding / forfeiture	Class A Common Stock	127,184^{footnote F3}	$21.61	$2.75M
Mar 2, 2026	Thomas D. Logan - Officer	Gift	Class A Common Stock	3,093,812^{footnote F4}	$0.00	-
Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR Footnote F2 (shares): Represents the settlement of certain performance-based restricted stock units ("PSU") previously granted on December 31, 2023, based on the achievement of specified performance goals as determined by the Issuer's compensation committee of its board of directors. Footnote F3 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of the PSUs previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in advance and does not… Full note on SEC EDGAR Footnote F4 (shares): On March 2, 2026, the Reporting Person made a gift of 3,093,812 shares of Class A Common Stock to the Logan Family Trust. The Reporting Person received no consideration for the gift.
Nov 24, 2025	Lawrence D. Kingsley - Director	Gift	Class A Common Stock	40,925^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 24, 2025, the Reporting Person made a gift of 40,925 shares of Class A Common Stock to a donor advised fund. The Reporting Person received no consideration for the gift.
Nov 21, 2025	Lawrence D. Kingsley - Director	Open-market sale	Class A Common Stock	300,000	$23.83	$7.15M
Nov 11, 2025	Loic Eloy - Officer	Open-market sale	Class A Common Stock	45,000	$27.24	$1.23M
Nov 10, 2025	Emmanuelle Lee - Officer	Open-market sale	Class A Common Stock	12,500	$27.41^{footnote F1}	$343K
Footnote F1 (price): The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2025.
Nov 6, 2025	Brian Schopfer - Officer	Open-market sale	Class A Common Stock	50,000	$27.65^{footnote F2}	$1.38M
Nov 6, 2025	Brian Schopfer - Officer	Open-market sale	Class A Common Stock	50,000	$27.66^{footnote F2}	$1.38M
Nov 6, 2025	Brian Schopfer - Officer	Grant or award	Class A Common Stock	100,000	-^{footnote F1}	-
Nov 6, 2025	Brian Schopfer - Officer	Derivative	Class B Common Stock	100,000	-^{footnote F1}	-
Footnote F1 (price): The Issuer issued 100,000 shares of Class A common stock of the Issuer to the reporting person pursuant to a redemption of 100,000 shares of Class B common stock of Mirion IntermediateCo, Inc. held by the reporting person effectuated pursuant to a 10b5-1 plan adopted by the… Full note on SEC EDGAR Footnote F2 (price): The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 7, 2025.

Recent MIR Form 8-K filings

Read MIR company news

Aug 31, 2026Item 8.01, 9.01

Read the filing on SEC EDGAR

Jul 28, 2026Item 2.02, 9.01

Read the filing on SEC EDGAR

Jul 2, 2026Item 5.02, 9.01

Read the filing on SEC EDGAR

May 14, 2026Item 5.07, 9.01

Recent MIR Form 144 notices of proposed sale

An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.

Filed	Filer	Relationship	Shares	Market value	Notice
May 7, 2026	-	-	-	-	View on EDGAR

MIR insider trading FAQ

What is the latest insider trade for MIR?

Mirion Technologies, Inc. (MIR) had 3 insider filings in the last 90 days, with the most recent on 2026-09-30. The full record for MIR runs to 54 Form 4 filings, the earliest from 2024-10-28. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying MIR stock?

1 insider purchase of MIR was filed in the last 90 days, totaling $312K.

How many insiders are selling MIR stock?

No insider sales of MIR were filed in the last 90 days. 14 sales are on record for this company.

Where can I see MIR SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects MIR Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Information Technology companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Sep 30, 2026 - Lawrence D. Kingsley view on EDGAR
Sep 30, 2026 - Jody Markopoulos view on EDGAR
Sep 2, 2026 - Brian Schopfer view on EDGAR
Jun 30, 2026 - Lawrence D. Kingsley view on EDGAR
May 14, 2026 - Lawrence D. Kingsley view on EDGAR
May 14, 2026 - Kenneth Bockhorst view on EDGAR
May 14, 2026 - Robert Cascella view on EDGAR
May 14, 2026 - Steven W. Etzel view on EDGAR
May 14, 2026 - John W. Kuo view on EDGAR

Related companies with recent insider activity

Learn more

How to read insider buying signals: What an open-market purchase by an insider can and cannot tell you.
Form 144 vs Form 4: A Form 144 announces a planned sale; the Form 4 reports it after it happens.
Insider activity in Information Technology: Where MIR's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Open-market purchase

20,000

$312K

Grant or award

2,666

Date

Insider

Transaction

Security

Price

Value

Sep 30, 2026

Lawrence D. Kingsley - Director

Grant or award

Class A Common Stock

1,333^{footnote F1}

$14.34

$19K

Footnote F1 (shares): 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.

Sep 30, 2026

Jody Markopoulos - Director

Grant or award

Class A Common Stock

1,333^{footnote F1}

$14.34

$19K

Footnote F1 (shares): 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.

Sep 2, 2026

Brian Schopfer - Officer

Open-market purchase

Class A Common Stock

20,000

$15.60

$312K

Jun 30, 2026

Lawrence D. Kingsley - Director

Grant or award

Class A Common Stock

1,095^{footnote F1}

$17.46

$19K

Footnote F1 (shares): 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.

May 13, 2026

Lawrence D. Kingsley - Director

Grant or award

Class A Common Stock

7,383^{footnote F1}

$0.00

Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR

May 13, 2026

Kenneth Bockhorst - Director

Grant or award

Class A Common Stock

7,383^{footnote F1}

$0.00

Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR

May 13, 2026

Robert Cascella - Director

Grant or award

Class A Common Stock

7,383^{footnote F1}

$0.00

Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR

May 13, 2026

Steven W. Etzel - Director

Grant or award

Class A Common Stock

7,383^{footnote F1}

$0.00

Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR

May 13, 2026

John W. Kuo - Director

Grant or award

Class A Common Stock

7,383^{footnote F1}

$0.00

Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR

May 13, 2026

Jody Markopoulos - Director

Grant or award

Class A Common Stock

7,383^{footnote F1}

$0.00

Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR

May 13, 2026

Sheila Rege - Director

Grant or award

Class A Common Stock

7,383^{footnote F1}

$0.00

Footnote F1 (shares): Represents restricted stock units that will vest on the earlier to occur of (i) first anniversary of the grant date or (ii) date of the annual stockholder meeting following the grant date, subject to the non-employee director's continued service on the Board through such vesting… Full note on SEC EDGAR

May 7, 2026

Christopher A. Moore - Officer

Open-market sale

Class A Common Stock

8,400

$19.64

$165K

May 6, 2026

Thomas D. Logan - Officer

Gift

Class A Common Stock

311,851^{footnote F1}

$0.00

Footnote F1 (shares): On May 6, 2026, the Reporting Person made a gift of 311,851 shares of Class A Common Stock to the Logan Family Trust. The Reporting Person received no consideration for this gift.

Apr 1, 2026

Alison Ulrich - Officer

Tax withholding / forfeiture

Class A Common Stock

2,053^{footnote F1}

$18.59

$38K

Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Apr 1, 2026

Brian Schopfer - Officer

Tax withholding / forfeiture

Class A Common Stock

7,377^{footnote F1}

$18.59

$137K

Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Apr 1, 2026

Christopher A. Moore - Officer

Tax withholding / forfeiture

Class A Common Stock

1,903^{footnote F1}

$18.59

$35K

Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Apr 1, 2026

Thomas D. Logan - Officer

Tax withholding / forfeiture

Class A Common Stock

22,614^{footnote F1}

$18.59

$420K

Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Apr 1, 2026

Emmanuelle Lee - Officer

Tax withholding / forfeiture

Class A Common Stock

4,680^{footnote F1}

$18.59

$87K

Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Mar 31, 2026

Lawrence D. Kingsley - Director

Grant or award

Class A Common Stock

1,104^{footnote F1}

$17.32

$19K

Footnote F1 (shares): 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.

Mar 2, 2026

Loic Eloy - Officer

Grant or award

Class A Common Stock

15,577^{footnote F1}

$0.00

Footnote F1 (shares): Represents the settlement of certain performance-based restricted stock units ("PSU") previously granted on December 31, 2023, based on the achievement of specified performance goals as determined by the Issuer's compensation committee of its board of directors.

Mar 1, 2026

Brian Schopfer - Officer

Tax withholding / forfeiture

Class A Common Stock

9,172^{footnote F1}

$21.61

$198K

Mar 2, 2026

Brian Schopfer - Officer

Grant or award

Class A Common Stock

64,906^{footnote F2}

$0.00

Mar 2, 2026

Brian Schopfer - Officer

Tax withholding / forfeiture

Class A Common Stock

28,499^{footnote F3}

$21.61

$616K

Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Footnote F2 (shares): Represents the settlement of certain performance-based restricted stock units ("PSU") previously granted on December 31, 2023, based on the achievement of specified performance goals as determined by the Issuer's compensation committee of its board of directors.
Footnote F3 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of the PSUs previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in advance and does not… Full note on SEC EDGAR

Mar 1, 2026

Alison Ulrich - Officer

Grant or award

Class A Common Stock

5,552^{footnote F1}

$0.00

Mar 1, 2026

Alison Ulrich - Officer

Tax withholding / forfeiture

Class A Common Stock

2,360^{footnote F2}

$21.61

$51K

Footnote F1 (shares): Represents restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date.
Footnote F2 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Mar 1, 2026

Christopher A. Moore - Officer

Grant or award

Class A Common Stock

5,552^{footnote F1}

$0.00

Mar 1, 2026

Christopher A. Moore - Officer

Tax withholding / forfeiture

Class A Common Stock

1,397^{footnote F2}

$21.61

$30K

Footnote F1 (shares): Represents restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date.
Footnote F2 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Mar 1, 2026

Emmanuelle Lee - Officer

Grant or award

Class A Common Stock

11,568^{footnote F1}

$0.00

Mar 1, 2026

Emmanuelle Lee - Officer

Tax withholding / forfeiture

Class A Common Stock

3,184^{footnote F2}

$21.61

$69K

Footnote F1 (shares): Represents restricted stock units that will vest in three equal annual installments starting on March 1, 2027, subject to the Reporting Person's continued employment through each vesting date.
Footnote F2 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR

Mar 1, 2026

Thomas D. Logan - Officer

Tax withholding / forfeiture

Class A Common Stock

20,650^{footnote F1}

$21.61

$446K

Mar 2, 2026

Thomas D. Logan - Officer

Grant or award

Class A Common Stock

318,632^{footnote F2}

$0.00

Mar 2, 2026

Thomas D. Logan - Officer

Tax withholding / forfeiture

Class A Common Stock

127,184^{footnote F3}

$21.61

$2.75M

Mar 2, 2026

Thomas D. Logan - Officer

Gift

Class A Common Stock

3,093,812^{footnote F4}

$0.00

Footnote F1 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of restricted stock units (RSUs) previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in… Full note on SEC EDGAR
Footnote F2 (shares): Represents the settlement of certain performance-based restricted stock units ("PSU") previously granted on December 31, 2023, based on the achievement of specified performance goals as determined by the Issuer's compensation committee of its board of directors.
Footnote F3 (shares): Represents shares that have been withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of the PSUs previously granted to the Reporting Person. Such withholding was mandated by the Issuer by a policy adopted in advance and does not… Full note on SEC EDGAR
Footnote F4 (shares): On March 2, 2026, the Reporting Person made a gift of 3,093,812 shares of Class A Common Stock to the Logan Family Trust. The Reporting Person received no consideration for the gift.

Nov 24, 2025

Lawrence D. Kingsley - Director

Gift

Class A Common Stock

40,925^{footnote F1}

$0.00

Footnote F1 (shares): On November 24, 2025, the Reporting Person made a gift of 40,925 shares of Class A Common Stock to a donor advised fund. The Reporting Person received no consideration for the gift.

Nov 21, 2025

Lawrence D. Kingsley - Director

Open-market sale

Class A Common Stock

300,000

$23.83

$7.15M

Nov 11, 2025

Loic Eloy - Officer

Open-market sale

Class A Common Stock

45,000

$27.24

$1.23M

Nov 10, 2025

Emmanuelle Lee - Officer

Open-market sale

Class A Common Stock

12,500

$27.41^{footnote F1}

$343K

Footnote F1 (price): The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2025.

Nov 6, 2025

Brian Schopfer - Officer

Open-market sale

Class A Common Stock

50,000

$27.65^{footnote F2}

$1.38M

Nov 6, 2025

Brian Schopfer - Officer

Open-market sale

Class A Common Stock

50,000

$27.66^{footnote F2}

$1.38M

Nov 6, 2025

Brian Schopfer - Officer

Grant or award

Class A Common Stock

100,000

-^{footnote F1}

Nov 6, 2025

Brian Schopfer - Officer

Derivative

Class B Common Stock

100,000

-^{footnote F1}

Footnote F1 (price): The Issuer issued 100,000 shares of Class A common stock of the Issuer to the reporting person pursuant to a redemption of 100,000 shares of Class B common stock of Mirion IntermediateCo, Inc. held by the reporting person effectuated pursuant to a 10b5-1 plan adopted by the… Full note on SEC EDGAR
Footnote F2 (price): The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 7, 2025.

Filed

Filer

Relationship

Market value

Notice

May 7, 2026

View on EDGAR