Institutional shares held 213 Million
2.45M calls
1.66M puts
Total value of holdings $5.79B
$66.4M calls
$44.9M puts
Market Cap $5.43B
200,068,992 Shares Out.
Institutional ownership 106.66%
# of Institutions 351


Latest Institutional Activity in MIR

Top Purchases

Q3 2025
Vanguard Group Inc Shares Held: 30.4M ($826M)
Q3 2025
Massachusetts Financial Services CO Shares Held: 5.39M ($146M)
Q3 2025
Conestoga Capital Advisors, LLC Shares Held: 1.35M ($36.7M)
Q3 2025
Principal Financial Group Inc Shares Held: 1.4M ($38M)
Q3 2025
Times Square Capital Management, LLC Shares Held: 1.01M ($27.5M)

Top Sells

Q3 2025
Bornite Capital Management LP Shares Held: 500K ($13.6M)
Q3 2025
Swedbank Ab Shares Held: 4.01M ($109M)
Q3 2025
Schwartz Investment Counsel Inc Shares Held: 854K ($23.2M)
Q3 2025
Jpmorgan Chase & CO Shares Held: 238K ($6.47M)
Q3 2025
Rice Hall James & Associates, LLC Shares Held: 223K ($6.05M)

About MIR

Mirion Technologies, Inc. provides radiation detection, measurement, analysis, and monitoring products and services in the United States, Canada, the United Kingdom, France, Germany, Finland, China, Belgium, Netherlands, Estonia, and Japan. It operates through two segments, Medical and Industrial. The medical segment offers radiation oncology quality assurance and dosimetry solutions; patient safety solutions for diagnostic imaging and radiation therapy centers; radiation therapy quality assurance solutions for calibrating and verifying imaging and treatment accuracy; and radionuclide therapy products for nuclear medicine applications, such as shielding, product handling, medical imaging furniture, and rehabilitation products. This segment supports applications in medical diagnostics, cancer treatment, practitioner safety, and rehabilitation. The Industrial segment focuses on addressing critical radiation safety, measurement, and analysis applications; and provides personal radiation detection, identification equipment, and analysis tools. The company's products and solutions also include nuclear medicines, dosimeters, contamination and clearance monitors, reactor instrumentation and control equipment and systems, medical and industrial imaging systems and related accessories, alpha spectroscopy instruments, alpha/beta counting instruments, and gamma spectroscopy detector systems; and electrical penetration, cancer diagnostics, software, and other services. It serves hospitals, clinics and urgent care facilities, dental and veterinary offices, radiation treatment facilities, OEMs for radiation therapy, laboratories, military organizations, government agencies, industrial companies, power and utility companies, reactor design firms, and NPPs. The company was formerly known as Global Monitoring Systems, Inc. and changed its name to Mirion Technologies, Inc. in January 2006. Mirion Technologies, Inc. was incorporated in 2005 and is headquartered in Atlanta, Georgia.


Insider Transactions at MIR

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
3.79M Shares
From 15 Insiders
Grant, award, or other acquisition 861K shares
Conversion of derivative security 2.93M shares
Sell / Disposition
2.08M Shares
From 13 Insiders
Open market or private sale 1.32M shares
Bona fide gift 129K shares
Sale (or disposition) back to the issuer 250K shares
Payment of exercise price or tax liability 382K shares

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