American Century Companies Reduces Stake in Mirion Technologies

Investment firm sells 143,814 shares of radiation detection company

Mar. 4, 2026 at 8:10am

American Century Companies Inc. has reduced its stake in Mirion Technologies, Inc. (NYSE:MIR) by 4.3%, selling 143,814 shares during the third quarter. The firm now owns 3,229,538 shares, or about 1.27% of the company's stock, valued at $75,119,000 at the end of the reporting period.

Why it matters

Mirion Technologies is a leading provider of radiation detection, measurement and monitoring solutions. The company's products are used in nuclear power, oil and gas, defense, and medical applications. American Century's reduced stake could signal a shift in investor sentiment or portfolio strategy, which could impact Mirion's stock price and future performance.

The details

According to a recent SEC filing, American Century Companies sold 143,814 shares of Mirion Technologies during the third quarter, reducing its total position to 3,229,538 shares. The investment firm now owns approximately 1.27% of Mirion's outstanding stock, down from 1.33% previously. Mirion Technologies went public in 2023 through a merger with a special purpose acquisition company (SPAC).

  • American Century Companies sold the Mirion shares during the third quarter of 2026.

The players

American Century Companies Inc.

An investment management firm that owns a significant stake in Mirion Technologies.

Mirion Technologies, Inc.

A leading global provider of radiation detection, measurement and monitoring solutions for nuclear power, oil and gas, defense, and medical applications.

Got photos? Submit your photos here. ›

The takeaway

The reduction in American Century's Mirion Technologies stake could signal a broader shift in investor sentiment towards the radiation detection company, which may impact its stock price and future growth prospects. However, Mirion remains a significant player in its industry, and its long-term outlook will depend on factors such as market demand, competitive dynamics, and the company's ability to innovate and expand its product offerings.