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 suggests that investors may be concerned about the company's valuation and engaging in profit-taking after recent gains.

Mirion's Q2 performance showed signs of strength, with revenue reaching $222.9 million, surpassing analyst estimates of $216.2 million. The company's net income for the quarter was $8.5 million, with adjusted earnings per share rising to $0.11, beating the expected $0.10. In light of these positive results, 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 encouraging financials and the announcement of Mirion's acquisition of Certrec, a leader in regulatory compliance for the nuclear industry, for $81 million, investors seemed to focus on valuation concerns. 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, combined with the stock's 28.5% year-to-date gain prior to the earnings release, may have prompted investors to take profits, leading to the sharp decline. The market's reaction suggests that even with positive developments, Mirion's current valuation may be seen as stretched, overshadowing the company's improved performance and outlook.