News Release Exhibit 99.1 Mirion Announces Fourth Quarter and Full Year 2025 Financial Results; Provides Full Year 2026 Guidance Atlanta, GA – February 10, 2026 – Mirion ("we" or the "company") (NYSE: MIR), a global provider of radiation detection, measurement, analysis, and monitoring solutions to the nuclear, medical, defense, and research end markets, today announced results for the fourth quarter and full year ended December 31, 2025. "Mirion concluded another successful year, highlighted by record orde ...