Capital World Investors Takes Position in Oklo Inc.

Hedge fund buys nearly half a million shares in nuclear microreactor startup

Mar. 13, 2026 at 8:19am

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Capital World Investors, a major investment firm, has acquired a new stake in Oklo Inc., a California-based energy technology company focused on the design and development of advanced nuclear microreactors. The firm purchased 481,015 shares of Oklo's stock, valued at approximately $53.7 million, giving it a 0.33% ownership stake in the company.

Why it matters

Oklo's innovative small modular reactor (SMR) technology, which leverages fast-neutron fission and liquid-metal cooling, has attracted significant investor interest as a potential solution for delivering carbon-free power. Capital World Investors' substantial investment signals confidence in Oklo's technology and growth potential within the advanced nuclear industry.

The details

According to a recent SEC filing, Capital World Investors acquired the Oklo shares in the third quarter of the previous year. The investment firm now owns approximately 0.33% of Oklo's outstanding stock. Other notable institutional investors in Oklo include Royal Bank of Canada, AQR Capital Management, and Millennium Management.

  • Capital World Investors acquired the Oklo shares in the 3rd quarter of 2025.

The players

Capital World Investors

A major investment firm that has acquired a new stake in Oklo Inc., a California-based energy technology company focused on advanced nuclear microreactors.

Oklo Inc.

A California-based energy technology company specializing in the design and development of advanced nuclear microreactors, with a focus on small modular reactor (SMR) technology that leverages fast-neutron fission and liquid-metal cooling.

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The takeaway

Capital World Investors' substantial investment in Oklo Inc. underscores the growing investor interest in advanced nuclear technologies, particularly small modular reactors, as a potential solution for delivering carbon-free power. Oklo's innovative approach to nuclear microreactors has attracted the attention of major institutional investors, signaling the company's promising growth prospects within the evolving energy landscape.