Mirion Technologies Completes Business Combination with GS Acquisition Holdings Corp II

Mirion Technologies Acquires Critical Infrastructure Business of Collins Aerospace

August 9, 2022

Cybersecurity

Mirion Technologies has completed the acquisition of the Critical Infrastructure (CI) business of Collins Aerospace (operating through ARINC Incorporated). The CI business — which will integrate under Mirion as Secure Integrated Solutions (SIS) and operates out of Carrollton, Texas and Pittsburgh, Pennsylvania — brings command-and-control software and cybersecurity capabilities for nuclear power plants and government facilities to expand Mirion's industrial software and digital offerings.

Mirion Technologies Acquires Sun Nuclear Corporation

January 7, 2021

Medical Devices

Mirion Technologies, a Charterhouse-backed provider of radiation detection and measurement solutions, has acquired Sun Nuclear Corporation, a global leader in radiation oncology quality assurance headquartered in Melbourne, Florida. The acquisition expands Mirion’s medical portfolio and capabilities in patient-safety solutions for diagnostic imaging and radiation therapy, integrating Sun Nuclear’s hardware and software QA offerings into Mirion’s global platform.

Mirion Technologies Acquires Paragon Energy Solutions from Windjammer Capital

December 1, 2025

Energy

Mirion Technologies, Inc. (NYSE: MIR) has completed the acquisition of Paragon Energy Solutions, a Fort Worth-based provider of engineered electrical, instrumentation & controls, HVAC, mechanical and flow components for nuclear power plants and small modular reactors. Paragon was sold by Windjammer Capital Investors, which had acquired the company in November 2021 and supported product expansion and sales-channel investments to position Paragon for growth in the nuclear sector.

Mirion Technologies Acquires Computerized Imaging Reference Systems (CIRS)

November 11, 2021

Medical Devices

Mirion Technologies, Inc. (NYSE: MIR) has signed a definitive agreement to acquire Computerized Imaging Reference Systems, Inc. (CIRS), a Norfolk, Virginia–based maker of medical imaging and radiation therapy phantoms. CIRS (≈80 employees) will be integrated into Mirion's Medical segment; the transaction is expected to close in Q4 2021 for approximately $54 million and is intended to expand Mirion's medical product and services capabilities and drive margin synergies.

Mirion Acquires Certrec to Expand Nuclear Compliance and Digital Capabilities

July 31, 2025

Energy

Mirion (NYSE: MIR) has acquired Certrec, a Fort Worth-based provider of regulatory compliance and digital integration solutions for the energy sector, for a cash purchase price of $81 million plus additional equity incentives. The acquisition brings software and recurring services capabilities to Mirion’s Nuclear & Safety group, strengthening its offerings across nuclear power facilities and broader electric generation markets.

Mirion Technologies Acquires Biodex Medical Systems

September 1, 2020

Medical Devices

Mirion Technologies, a San Ramon-based, PE-backed provider of radiation detection and measurement solutions, acquired Biodex Medical Systems, Inc. effective September 1, 2020. Biodex, a manufacturer of nuclear medicine instruments, medical imaging equipment and rehabilitation systems headquartered in Shirley, New York, will expand Mirion's medical device and imaging capabilities as part of Mirion's strategic plan to grow its medical business.