Mirion Announces Third Quarter 2023 Financial Results and Reiterates Full Year Guidance

• Revenues for the third quarter increased 18.8% to $191.2 million, compared to $160.9 million in the same period last year.

• Net loss was $12.1 million in the third quarter, compared to a net loss of $47.1 million in the same period last year. Adjusted EBITDA was $38.8 million, a 26.0% increase from $30.8 million in the same period last year.

• Net loss per share for the third quarter was $0.06, compared to $0.26 in the third quarter of 2022. Adjusted earnings per share for the quarter was $0.05, compared to $0.03 in the same period last year.

• The company reiterated full year 2023 guidance for revenue growth of 8% to 10%, adjusted EBITDA of $175 million to $185 million, adjusted EPS of $0.28-$0.34 and adjusted free cash flow of $45 million to $75 million.

• Closed on acquisition of ec² Software Solutions LLC and NUMA LLC (collectively "ec²"), a leading provider of end-to-end nuclear medicine workflow software.

Mirion ("we" or the "company") (NYSE:MIR), a global provider of radiation detection, measurement, analysis and monitoring solutions to the medical, nuclear, defense, and research end markets, today announced results for the third quarter ended September 30, 2023. Related materials will be available online at ir.mirion.com. On November 1, 2023, Mirion also closed the acquisition of ec², with a purchase price of $33 million through an all cash purchase.

"This was an excellent quarter for Mirion," stated Thomas Logan, Mirion's Chief Executive Officer. "We delivered strong results across the business and order generation was exceptional. We exited Q3 with a record backlog position and both reporting segments delivered solid organic revenue growth. The business delivered adjusted EBITDA margin expansion compared to the same period last year and we made progress executing on our cash flow and net working capital enhancement initiatives."

"I am proud of the team's execution during the third quarter," added Larry Kingsley, Chairman of Mirion's Board. "They've taken a thoughtful approach to expanding margins, generating solid cash flow and deleveraging the business - and made meaningful progress on each during the third quarter. There is still work to be done, but the business has generated positive momentum heading into the fourth quarter."

Acquisition of ec²

Headquartered in Las Vegas, NV, ec² is a leading medical software company that designs, implements and supports comprehensive software solutions servicing the nuclear medicine space. ec² is estimated to generate a total of approximately $12 million in revenue and $5.5 million of proforma adjusted EBITDA for full year 2023, inclusive of pre-acquisition financial results. The ec² team and portfolio of solutions will be integrated into Mirion's Nuclear Medicine business unit. ec²'s portfolio of solutions will play a key role in expanding Mirion's software offerings to Medical customers.

"I am pleased to welcome my new colleagues from ec² to the Mirion family," Mr. Logan said. "By adding ec² to our Medical portfolio, we can now offer more comprehensive software solutions to our Nuclear Medicine customers, augmenting the value of our portfolio of hardware solutions in a highly complementary fashion."

Reiterated 2023 Outlook

"Third quarter results were in-line with our expectations and position us well for a strong fourth quarter," continued Mr. Logan. "Today, we are reiterating our financial guidance for the full year. Our focus is on commercial execution and operational excellence as we aim to meet expectations and make progress on our cash flow and margin expansion initiatives."

Mirion is reiterating its guidance for the fiscal year and 12-month period ending December 31, 2023:

• Revenue growth of 8% - 10%
• Organic revenue growth of 6% - 8%
• Adjusted EBITDA of $175 million - $185 million
• Adjusted EPS of $0.28 - $0.34
• Adjusted free cash flow of $45 million - $75 million

Inorganic revenue growth is expected to be approximately 1.5%, including benefits from the SIS and ec² acquisitions, partially offset by the Biodex rehab divestiture. Foreign exchange rates are expected to result in a positive 0.5% impact to revenue growth. The guidance for organic revenue growth excludes the impact of foreign exchange rates as well as mergers, acquisitions and divestitures. This guidance includes estimates for the ec² acquisition.

Other modeling and guidance assumptions include the following:

• Euro to U.S. Dollar foreign exchange conversion rate of 1.06
• Net interest expense of approximately $60 million (approximately $55 million of cash interest)
• Approximately 199 million shares of Class A common stock outstanding (excludes 7.8 million shares of Class B common stock, 27.2 million warrants, 18.8 million founder shares, subject to vesting, 2.1 million restricted stock units, 0.6 million performance stock units and a further 28.7 million shares reserved for future equity awards (subject to annual automatic increases) (all numbers as of September 30, 2023))

The Company's guidance contains forward-looking statements and actual results may differ materially as a result of known and unknown uncertainties and risks, including those set forth below under the heading "Forward-Looking Statements." In addition, forward-looking non-GAAP financial measures are presented on a non-GAAP basis without reconciliations of such forward-looking non-GAAP measures due to the inherent difficulty in projecting and quantifying the various adjusting items necessary for such reconciliations, such as stock-based compensation expense, amortization and depreciation expense, merger and acquisition activity and purchase accounting adjustments, that have not yet occurred, are out of Mirion's control, or cannot be reasonably predicted. Accordingly, reconciliations of our guidance for organic revenue growth, adjusted EBITDA, adjusted EPS, adjusted free cash flow and net leverage are not available without unreasonable effort.

Conference Call

Mirion will host a conference call tomorrow, November 2, 2023, at 12:00 p.m. ET to discuss its financial results. Participants may access the call by dialing 1-877-407-9208 or 1-201-493-6784, and requesting to join the Mirion Technologies, Inc. earnings call. A live webcast will also be available at https://ir.mirion.com/news-events.

A telephonic replay will be available shortly after the conclusion of the call and until November 16, 2023. Participants may access the replay at 1-844-512-2921, international callers may use 1-412-317-6671, and enter access code 13742074. An archived replay of the call and an accompanying presentation will also be available on the Investors section of the Mirion website at https://ir.mirion.com/.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. Words such as "anticipate," "believe," "continue," "could," "estimate", "expect", "hope", "intend", "may", "might", "should", "would", "will", "understand" and similar words are intended to identify forward looking statements. These forward-looking statements include but are not limited to, statements regarding our future operating results and financial position, our business strategy and plans, our objectives for future operations, macroeconomic trends, foreign exchange, interest rate and inflation expectations, any future mergers, acquisitions, divestitures and strategic investments, including the completion and integration of previously completed transactions, our future share capitalization and any exercise, exchange or other settlement of our outstanding warrants and other securities. There are a significant number of factors that could cause actual results to differ materially from statements made in this press release, including changes in domestic and foreign business, market, economic, financial, political and legal conditions, especially related to matters affecting Russia, the relationship between the United States and China and conflict in the Middle East; risks related to the public's perception of nuclear radiation and nuclear technologies; risks related to the continued growth of our end markets; our ability to win new customers and retain existing customers; our ability to realize sales expected from our backlog of orders and contracts; risks related to governmental contracts; our ability to mitigate risks associated with long-term fixed price contracts, including risks related to inflation; risks related to information technology disruption or security; risks related to the implementation and enhancement of information systems; our ability to manage our supply chain or difficulties with third-party manufacturers; risks related to competition; our ability to manage disruptions of, or changes in, our independent sales representatives, distributors and original equipment manufacturers; our ability to realize the expected benefit from strategic transactions, such as acquisitions, divestitures and investments, including any synergies, or internal restructuring and improvement efforts; our ability to issue debt, equity or equity-linked securities in the future; risks related to changes in tax law and ongoing tax audits; risks related to future legislation and regulation both in the United States and abroad; risks related to the costs or liabilities associated with product liability claims; our ability to attract, train and retain key members of our leadership team and other qualified personnel; risks related to the adequacy of our insurance coverage; risks related to the global scope of our operations, including operations in international and emerging markets; risks related to our exposure to fluctuations in foreign currency exchange rates, interest rates and inflation, including the impact on our debt service costs; our ability to comply with various laws and regulations and the costs associated with legal compliance; risks related to the outcome of any litigation, government and regulatory proceedings, investigations and inquiries; risks related to our ability to protect or enforce our proprietary rights on which our business depends or third-party intellectual property infringement claims; liabilities associated with environmental, health and safety matters; our ability to predict our future operational results; risks associated with our limited history of operating as an independent company; and the effects of health epidemics, pandemics and similar outbreaks may have on our business, results of operations or financial condition. Further information on risks, uncertainties and other factors that could affect our financial results are included in the filings we make with the Securities and Exchange Commission (the "SEC") from time to time, including our Annual Report on Form 10-K, our Quarterly Reports on Form 10-Q and other periodic reports filed or to be filed with the SEC.

You should not rely on these forward-looking statements, as actual outcomes and results may differ materially from those contemplated by these forward- looking statements as a result of such risks and uncertainties. All forward-looking statements in this press release are based on information available to us as of the date hereof, and we do not assume any obligation to update the forward-looking statements provided to reflect events that occur or circumstances that exist after the date on which they were made.

Use of Non-GAAP Financial Information

We believe that the presentation of non-GAAP financial information provides important supplemental information to management and investors regarding financial and business trends relating to our financial condition and results of operations. For further information regarding these non-GAAP measures, including the reconciliation of these non-GAAP financial measures to their most directly comparable GAAP financial measures, please refer to the financial tables below, as well as the "Reconciliation of Non-GAAP Financial Measures" section of this press release. Non-GAAP financial information is not a substitute for GAAP financial information and undue reliance should not be placed on such non-GAAP financial information. In addition, similarly titled items used by other companies may not be comparable due to variations in how they are calculated and how terms are defined.

Channels for Disclosure of Information

Mirion intends to announce material information to the public through the Mirion Investor Relations website ir.mirion.com, SEC filings, press releases, public conference calls and public webcasts. Mirion uses these channels, as well as social media, to communicate with its investors, customers, and the public about the company, its offerings, and other issues. It is possible that the information Mirion posts on social media could be deemed to be material information. As such, Mirion encourages investors, the media, and others to follow the channels listed above, including the social media channels listed on Mirion's investor relations website, and to review the information disclosed through such channels. Any updates to the list of disclosure channels through which Mirion will announce information will be posted on the investor relations page on Mirion's website.

About Mirion

Mirion (NYSE:MIR) is a global leader in radiation safety, science and medicine, empowering innovations that deliver vital protection while harnessing the transformative potential of ionizing radiation across a diversity of end markets. The Mirion Technologies group provides proven radiation safety technologies that operate with precision – for essential work within R&D labs, critical nuclear facilities, and on the front lines. The Mirion Medical group solutions help enhance the delivery and ensure safety in healthcare, powering the fields of Nuclear Medicine, Radiation Therapy QA, Occupational Dosimetry, and Diagnostic Imaging. Headquartered in Atlanta (GA – USA), Mirion employs approximately 2,700 people and operates in 12 countries. Learn more at mirion.com.

Share Count

Consists of 199,210,513 shares of Class A common stock outstanding as of September 30, 2023. Excludes (1) 7,832,333 shares of Class B common stock outstanding as of September 30, 2023; 18,750,000 founder shares which are shares of Class A common stock 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, and such shares will be forfeited to us if they fail to vest within five years after October 20, 2021; (2) 27,249,779 shares of Class A common stock issuable upon the exercise of 8,500,000 private placement warrants and 18,749,779 publicly-traded warrants; (3) 2.1 million shares of Class A common stock underlying restricted stock units and 0.6 million shares of Class A common stock underlying performance stock units; and (4) any shares issuable from awards under our 2021 Omnibus Incentive Plan, which had 28,721,923 shares reserved for future equity awards (subject to annual automatic increases). The 7,832,333 shares of Class B common stock are paired on a one-for-one basis with shares of Class B common stock of Mirion Intermediate Co., Inc. (the "paired interests"). Holders of the paired interests have the right to have their interests redeemed for, at the option of Mirion, shares of Class A common stock on a one-for-one basis or cash based on a trailing stock price average. All share data is of September 30, 2023 unless otherwise noted.

Reconciliation of Non-GAAP Financial Measures

In addition to our results determined in accordance with GAAP, we believe the following non-GAAP measures are useful in evaluating our operating performance. We use the following non-GAAP financial information to evaluate our ongoing operations and for internal planning and forecasting purposes. We believe that non-GAAP financial information, when taken collectively, may be helpful to investors because it provides consistency and comparability with past financial performance. However, non-GAAP financial information is presented for supplemental informational purposes only, has limitations as an analytical tool, and should not be considered in isolation or as a substitute for financial information presented in accordance with GAAP. Other companies, including companies in our industry, may calculate similarly titled non-GAAP measures differently or may use other measures to evaluate their performance, all of which could reduce the usefulness of our non-GAAP financial measures as tools for comparison.

Investors are encouraged to review the related GAAP financial measures and the reconciliation of these non-GAAP financial measures to their most directly comparable GAAP financial measures and not rely on any single financial measure to evaluate our business.

Organic Revenues is defined as Revenues excluding the impact of foreign exchange rates as well as mergers, acquisitions and divestitures in the period.

Adjusted EBITDA is defined as net income before interest expense, income tax expense, depreciation and amortization adjusted to remove the impact of foreign currency gains and losses, amortization of acquired intangible assets, the impact of purchase accounting on the recognition of deferred revenue, changes in the fair value of warrants, certain non-operating expenses (certain purchase accounting impacts related to revenues and inventory, restructuring and costs to achieve operational synergies, merger, acquisition and divestiture expenses and IT project implementation expenses), stock-based compensation expense, debt extinguishment and income tax impacts of these adjustments.

Adjusted Net Income is defined as GAAP net income adjusted for foreign currency gains and losses, amortization of acquired intangible assets, the impact of purchase accounting on the recognition of deferred revenue, changes in the fair value of warrants, certain non-operating expenses (certain purchase accounting impacts related to revenues and inventory, restructuring and costs to achieve operational synergies, merger, acquisition and divestiture expenses and IT project implementation expenses), stock-based compensation expense, debt extinguishment and income tax impacts of these adjustments.

Adjusted EPS is defined as adjusted net income divided by weighted average common shares outstanding — basic and diluted.

Adjusted Free Cash Flow is defined as free cash flow adjusted to include the impact of cash used to fund non-operating expenses. We believe that the inclusion of supplementary adjustments to free cash flow applied in presenting adjusted free cash flow is appropriate to provide additional information to investors about our cash flows that management utilizes on an ongoing basis to assess our ability to generate cash for use in acquisitions and other investing and financing activities.

Free Cash Flow is defined as U.S. GAAP net cash provided by operating activities adjusted to include the impact of purchases of property, plant, and equipment and purchases of badges.

Net Leverage is defined as Net Debt (debt minus cash and cash equivalents) divided by Adjusted EBITDA plus contributions to Adjusted EBITDA if acquisitions made during the applicable period had been made before the start of the applicable period.

Operating Metrics

Order Growth is defined as the amount of revenue earned in a given period and estimated to be earned in future periods from contracts entered into in a given period as compared with such amount for a prior period. Order growth was calculated excluding the impact of the Hanhikivi project termination in the second quarter of 2022. Foreign exchange rates are based on the applicable rates as reported for the time period.

The following tables presents reconciliations of certain non-GAAP financial measures for the applicable periods.

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