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Earnings (Loss) Per Share | 12 Months Ended
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Dec. 31, 2025
Earnings Per Share [Abstract] |
Earnings (Loss) Per Share | Earnings (Loss) Per Share A reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings (loss) per common share is as follows (in millions, except share and per share amounts):
|  | Fiscal Year Ended December 31, 2025 |  | Fiscal Year Ended December 31, 2024 |  | Fiscal Year Ended December 31, 2023
Net earnings (loss) attributable to Mirion Technologies, Inc. shareholders |  | $ | 28.8 |  |  | $ | (36.1) |  |  | $ | (96.9) |
Weighted average common shares outstanding – basic |  | 229.959 |  |  | 204.991 |  |  | 196.369 |
Effect of potentially dilutive securities – stock-based awards |  | 0.874 |  |  | — |  |  | — |
Effect of potentially dilutive securities – convertible debt |  | 30.321 |  |  | — |  |  | — |
Weight average common shares outstanding – diluted |  | 261.154 |  |  | 204.991 |  |  | 196.369 |
Net earnings (loss) per common share attributable to Mirion Technologies, Inc. — basic |  | $ | 0.13 |  |  | $ | (0.18) |  |  | $ | (0.49) |
Net earnings (loss) per common share attributable to Mirion Technologies, Inc. — diluted |  | $ | 0.11 |  |  | $ | (0.18) |  |  | $ | (0.49) |
Anti-dilutive employee stock-based awards, excluded |  | 0.080 |  |  | 2.771 |  |  | 0.639 |
Net earnings (loss) per share of common stock is computed using the two-class method required for multiple classes of common stock and participating securities based upon their respective rights to receive dividends as if all income for the period has been distributed. Basic earnings (loss) per share is computed by dividing earnings (loss) available to common stockholders by the weighted average number of common shares outstanding, adjusted for the outstanding non-vested shares. Diluted earnings (loss) per share is computed by giving effect to all potentially dilutive securities outstanding for the period using the treasury stock method or the if-converted method based on the nature of such securities. For periods in which the Company reports net losses, diluted net loss per common share attributable to common stockholders is the same as basic net loss per common share attributable to common stockholders, because potentially dilutive common shares are not assumed to have been issued if their effect is anti-dilutive. The Company incurred a net loss for the fiscal years ended December 31, 2024, and December 31, 2023; therefore, none of the potentially dilutive common shares were included in the diluted share calculations for those periods as they would have been anti-dilutive. The following classes of common stock were considered in the earnings (loss) per share calculation. Class A Common Stock Holders of shares of our Class A common stock are entitled to one vote for each share held of record on all matters on which stockholders are entitled to vote generally, including the election or removal of directors. The holders of our Class A common stock do not have cumulative voting rights in the election of directors. Holders of shares of our Class A common stock are entitled to receive dividends when and if declared by the Company's Board of Directors out of funds legally available therefor, subject to any statutory or contractual restrictions on the payment of dividends and to any restrictions on the payment of dividends imposed by the terms of any outstanding preferred stock. Upon our liquidation, dissolution or winding up and after payment in full of all amounts required to be paid to creditors and to the holders of preferred stock having liquidation preferences, if any, the holders of shares of our Class A common stock will be entitled to receive pro rata our remaining assets available for distribution. Class A common stock issued and outstanding is included in the Company’s basic earnings (loss) per share calculation, with the exception of Founder Shares for certain periods as discussed below. Class B Common Stock Holders of shares of our Class B common stock are entitled to one vote for each share held of record on all matters on which stockholders are entitled to vote generally, including the election or removal of directors. If at any time the ratio at which shares of IntermediateCo Class B common stock are redeemable or exchangeable for shares of our Class A common stock changes from one-for-one as the number of votes to which our Class B common stockholders are entitled will be adjusted accordingly. The holders of our Class B common stock do not have cumulative voting rights in the election of directors. Except for transfers to us or to certain permitted transferees set forth in the IntermediateCo certificate of incorporation, paired interests may not be sold, transferred or otherwise disposed of. Holders of shares of our Class B common stock are not entitled to economic interests in us or to receive dividends or to receive a distribution upon our liquidation or winding up. However, if IntermediateCo makes distributions to us other than solely with respect to our Class A common stock, the holders of paired interests will be entitled to receive distributions pro rata in accordance with the percentages of their respective shares of IntermediateCo Class B common stock. Our Class B common stock has voting rights but no economic interest in the Company and therefore are excluded from the calculation of basic and diluted earnings (loss) per share. Warrants As described above, as of December 31, 2023, the Company had outstanding warrants to purchase up to 27,249,779 shares of Class A common stock (including 18,749,779 public warrants and 8,500,000 private placement warrants). One whole warrant entitles the holder thereof to purchase one share of Mirion Class A common stock at a price of $11.50 per share. For the year ended December 31, 2023 the Company’s outstanding warrants were not included in the Company’s calculation of basic loss per share and are excluded from the calculation of diluted loss per share because their inclusion would be anti-dilutive. During the second quarter of the year ended December 31, 2024, all warrants were exercised, redeemed, or exchanged for shares of Mirion Class A common stock or cash. Any shares of Mirion Class A common stock received are included in the calculation of basic and diluted earnings (loss) per share. Founder Shares The Founder Shares were subject to vesting in three equal tranches, based on the volume-weighted average price of our Class A common stock being greater than or equal to $12.00, $14.00 and $16.00 per share for any 20 trading days in any 30 consecutive trading day period. Holders of the founder shares are entitled to vote such founder shares and receive dividends and other distributions with respect to such founder shares prior to vesting, but such dividends and other distributions with respect to unvested founder shares will be set aside by the Company and shall only be paid to the holders of the founder shares upon the vesting of such founder shares. During the fourth quarter of the year ended December 31, 2024, all of the founder shares met the required vesting conditions and the Class A common shares were considered outstanding for purposes of our earnings (loss) per share calculation. Previous to the vesting, since the holders of the founder shares were not entitled to participate in earnings unless the vesting conditions were met, the founders shares were previously excluded from the calculation of our earnings (loss) per share. Stock-Based Awards Each stock-based award represents the right to receive a Class A common stock upon vesting of the awards. Per ASC 260, Earnings Per Share ("EPS"), shares issuable for little or no cash consideration upon the satisfaction of certain conditions (i.e., contingently issuable shares) should be included in the computation of basic EPS as of the date that all necessary conditions have been satisfied. As such, any stock-based awards such as RSUs that vest will be included in the Company's basic earnings (loss) per share calculations as of the date when all necessary conditions are met. We determine the potential dilutive effect of outstanding stock-based awards on EPS using the treasury stock method. Convertible Notes During the year ended December 31, 2025, the Company issued $400.0 million aggregate principal amount of Convertible Notes due 2030 (the "2030 Notes") and an additional $375.0 million aggregate principal amount of Convertible Notes due 2031 (the "2031 Notes"). The initial conversion rate of the 2030 Notes and 2031 Notes is 43.2751 shares and 34.6951 shares, respectively, of Mirion's Class A common stock per $1,000 principal amount of Notes. We determine the potential dilutive impact of the outstanding Notes on EPS using the if-converted method, assuming the conversion of the Notes as of the earliest period reporting or at the date of issuance, if later. The effect of the related Capped Call transactions would be anti-dilutive and, as such, is excluded.

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