Mirion Technologies (MIR) experienced a significant 24-hour plunge of 10.43% on Thursday, despite reporting better-than-expected second-quarter results and raising its full-year guidance. The sharp decline comes as a surprise to many investors, given the company's seemingly positive financial performance.

In its Q2 earnings report, Mirion announced revenue of $222.9 million, surpassing analyst estimates of $216.2 million. The company's net income reached $8.5 million, with adjusted earnings per share rising to $0.11, beating the expected $0.10. Furthermore, Mirion raised its 2025 revenue growth guidance to 7%-9% from the previous 5%-7% and now forecasts adjusted EPS of $0.48-$0.52 per share.

Despite these strong results, the stock's significant drop may be attributed to several factors. Firstly, valuation concerns have emerged, as the stock was recently trading at 42 times the next 12-month earnings, up from a P/E of 30 three months ago. This high valuation may have led to profit-taking by investors. Additionally, Mirion announced the acquisition of Certrec, a leader in regulatory compliance and advanced digital applications for the nuclear industry, for $81 million plus additional equity incentives. While this acquisition aligns with the company's strategic goals, it may have raised concerns about short-term financial impacts. Lastly, despite the positive results, market expectations may have been even higher, leading to disappointment among some investors.