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.
Backlog shifts in the Nuclear & Safety segment, medical dosimetry margins, even radiation-shielding warranty reserves—Mirion’s SEC disclosures run deep and technical. Finding those nuggets in a 300-page filing can stall your analysis. StockTitan solves that problem by delivering AI-powered summaries that surface the exact line items you need, turning Mirion SEC filings explained simply into an effortless read.
Whether you’re tracking Mirion insider trading Form 4 transactions or need a quick look at the Mirion quarterly earnings report 10-Q filing, our platform updates the moment a document hits EDGAR. AI highlights cash-flow drivers, links radiation-monitoring orders to revenue guidance, and flags segment risk factors. You can scan Mirion Form 4 insider transactions real-time, open a Mirion annual report 10-K simplified or drill into a sudden disclosure with Mirion 8-K material events explained—all without wading through legal jargon.
Investors use these insights to:
- compare quarter-over-quarter unit shipments in Medical
- monitor contract wins announced in 8-Ks
- review Mirion proxy statement executive compensation against radiation-tech peers
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)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.
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