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.
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.
Mirion Technologies, Inc. (MIR) filed a Form 4 disclosing that its Chief Financial Officer, Brian Schopfer, made charitable gifts of company stock. On December 5, 2025 and December 8, 2025, he gifted a total of 2,500 shares of Class A Common Stock to a university and received no payment for these shares. After these transactions, he beneficially owned 901,932 shares of Class A Common Stock and 399,935 shares of Class B Common Stock, all held directly.
Mirion Technologies announced that its subsidiaries entered into Amendment No. 6 to their Credit Agreement, creating a new $450,000,000 tranche of term loans maturing on June 5, 2032. These "Replacement Term Loans" were used, along with other cash sources, to refinance all term loans outstanding under the prior Credit Agreement.
The new loans carry an applicable margin of 2.00% for Term SOFR Loans and 1.00% for ABR Loans, with a 25 basis point reduction in each margin if Mirion achieves and maintains a Ba3 corporate rating from Moody’s and a BB- corporate rating from S&P. The loans have a SOFR credit spread adjustment of 0.00% and a SOFR floor of 0.00%, and include a 1% prepayment premium if repaid in connection with a repricing transaction within six months of the amendment date.
Mirion Technologies, Inc. announced that it has completed its previously disclosed acquisition of all outstanding membership interests of WCI-Gigawatt Intermediate Holdco, LLC, the indirect parent of Paragon Energy Solutions, LLC, on December 1, 2025. This transaction moves Paragon and its operations fully under Mirion’s control through the acquired holding company structure. While financial terms are not detailed here, closing the deal marks the transition from announcement to execution and confirms that required closing conditions have been satisfied.
Mirion Technologies, Inc. (MIR) director Lawrence Kingsley reported an equity transfer on Form 4. On November 24, 2025, a revocable trust associated with him made a gift of 40,925 shares of Class A Common Stock to a donor advised fund, and he received no payment for this transfer. Following the gift, the trust indirectly held 3,859,075 Class A shares, and Kingsley directly held 62,137 Class A shares.
Mirion Technologies, Inc. director reports stock sale. A reporting person serving as a director of Mirion Technologies, Inc. (MIR) reported selling 300,000 shares of Class A common stock on 11/21/2025. The transaction was coded "S" as a sale, at a reported price of $23.828 per share.
After this transaction, the reporting person beneficially owned 3,900,000 shares of Class A common stock indirectly through the Lawrence D. Kingsley Revocable Trust, and 62,137 shares directly. The filing is made on Form 4 for one reporting person and shows no derivative securities activity.
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.