Welcome to our dedicated page for Mirion Technologies SEC filings (Ticker: MIR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Mirion Technologies, Inc. filings document operating results, executive compensation, proxy matters and financing arrangements for a radiation detection, measurement, analysis and monitoring company serving nuclear, medical, defense and research markets. Form 8-K reports furnish financial-results releases, guidance updates, material definitive agreements, credit-agreement refinancing activity and other material events.
Proxy filings disclose governance and compensation subjects, including equity-award tables, pay-versus-performance information and a performance-vesting stock option award for the company's chief executive officer. The filing record also covers debt terms at operating subsidiaries and material-event disclosures tied to changes in the company's nuclear technology portfolio.
MIR filed a Form 144 indicating a proposed sale of restricted or control securities. The notice covers up to 300,000 shares of Class A Common stock to be sold through UBS Financial Services Inc. on the NYSE, with an aggregate market value of $7,125,000. The filing notes that 245,000,000 shares of this class were outstanding and lists an approximate sale date of 11/21/2025.
The seller reports having acquired 3,150,000 Class A Common shares on 11/05/2024 in a private transaction from the issuer, with payment made on the same date. By signing the notice, the seller represents that they are not aware of any material adverse, non-public information about MIR’s current or prospective operations.
Mirion Technologies (MIR) reported an insider transaction on a Form 4. On 11/11/2025, the company’s Nuclear & Safety President, Loic Eloy, sold 45,000 shares of Class A common stock at an average price of $27.2374.
Following the sale, Eloy beneficially owns 97,770 shares, held directly.
Mirion Technologies (MIR) Chief Legal Officer Emmanuelle Lee reported an open-market sale of 12,500 shares of Class A common stock at $27.4114 on 11/10/2025, executed under a Rule 10b5-1 trading plan adopted on August 11, 2025.
Following the transaction, she beneficially owns 84,640 Class A shares directly. She also holds 138,193 Class B shares directly and 32,748 Class B shares indirectly via the Lee Revocable Living Trust, where she and her spouse serve as trustees and beneficiaries.
Mirion Technologies (MIR) filed a Form 144 notice for a proposed sale of 12,500 shares of common stock. The shares were acquired via Restricted Stock Units on 12/27/2023. The filing lists Morgan Stanley Smith Barney LLC as broker, with an approximate sale date of 11/10/2025 on the NYSE and an aggregate market value of $343,125.00. Shares outstanding were 247,821,635 as of the filing’s reference. This is a notice of potential sales by an affiliate or insider under Rule 144.
Mirion Technologies (MIR) disclosed insider activity by its Chief Financial Officer on 11/06/2025. The company issued 100,000 shares of Class A common stock to the officer in connection with a redemption of 100,000 shares of Class B common stock of Mirion IntermediateCo., and the issuer cancelled 100,000 shares of its Class B common stock. The officer then sold 100,000 Class A shares in two trades at $27.6524 and $27.656 under a Rule 10b5-1 plan adopted on August 7, 2025. After these transactions, direct holdings were 904,432 Class A shares and 399,935 Class B shares.
Mirion Technologies plans a credit agreement refinancing. On November 6, 2025, its U.S. subsidiaries allocated a $450,000,000 tranche of replacement term loans maturing in 2032. The Applicable Margin is expected to be 2.00% for Term SOFR Loans and 1.00% for ABR Loans, with a 25 basis point reduction upon achievement and maintenance of Ba3 (Moody’s) and BB- (S&P) corporate ratings. The loans are expected to be issued with no upfront fees, a SOFR credit spread adjustment of 0.00%, and a SOFR floor of 0.00%.
Proceeds will refinance all outstanding term loans under the existing 2021 Credit Agreement. The transactions are subject to conditions and are anticipated to close in the fourth quarter of 2025; there is no assurance they will be completed on these terms or at all.
Mirion Technologies (MIR) filed a Form 144 notice for a proposed sale of 100,000 shares of Class A common stock. The filing lists an aggregate market value of $2,765,420 and an approximate sale date of 11/06/2025.
The broker named is UBS Financial Services, Inc. and the securities are listed on the NYSE. The seller is identified as Renaissance Charitable Foundation, Inc., Schopfer Family Charitable Fund. The shares to be sold were acquired in the IPO on 10/20/2021, amounting to 100,000 shares.
The notice also reports sales in the past three months: 15,000 shares of Class A common stock were sold on 10/30/2025 for $443,550 in gross proceeds. Shares outstanding were 247,821,635 as of the date shown in the form.
Mirion Technologies (MIR): CEO and director Thomas D. Logan reported a charitable gift of 106,188 shares of Class A Common Stock on 10/30/2025 (transaction code G) at a reported price of $0.
Following the transaction, reported holdings were 3,349,551 shares of Class A Common Stock directly, 1,544,017 shares of Class B Common Stock directly, and 111,566 shares of Class A Common Stock held indirectly via the Logan Family Trust.
Mirion Technologies (MIR) Form 4: Chief Financial Officer Brian Schopfer reported a charitable gift of 15,000 shares of Class A Common Stock on 10/30/2025, coded “G,” with a price of $0. Following the transaction, he beneficially owned 904,432 shares of Class A Common Stock (direct) and 499,935 shares of Class B Common Stock (direct). The filing notes the gift was to a donor advised fund and that no consideration was received.
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%.