Pinnbrook Capital Invests $2M in Oklo Inc.

The investment firm bought a new stake in the advanced nuclear microreactor company.

Mar. 14, 2026 at 9:22am

Got story updates? Submit your updates here. ›

Pinnbrook Capital Management LP purchased 17,870 shares of Oklo Inc. (NYSE:OKLO) during the third quarter, according to a recent SEC filing. The investment, valued at approximately $1,995,000, represents a new stake in the California-based energy technology company that specializes in the design and development of advanced nuclear microreactors.

Why it matters

Oklo's focus on small modular reactor (SMR) technology that uses fast-neutron fission and liquid-metal cooling to deliver carbon-free power has attracted interest from investors as the company aims to bring its compact, factory-built reactors online within the next decade. Pinnbrook's investment signals confidence in Oklo's technology and growth potential.

The details

Pinnbrook Capital Management, an investment firm, acquired the new stake in Oklo during the third quarter. The 17,870 shares purchased are valued at around $1,995,000. Oklo is developing its flagship product, the Aurora microreactor, a 1.5-megawatt electric (MWe) fast reactor cooled by a sodium alloy.

  • Pinnbrook Capital Management purchased the Oklo shares during the third quarter of the year.

The players

Pinnbrook Capital Management LP

An investment firm that purchased a new stake in Oklo Inc.

Oklo Inc.

A California-based energy technology company specializing in the design and development of advanced nuclear microreactors.

Got photos? Submit your photos here. ›

The takeaway

Pinnbrook Capital's investment in Oklo reflects growing investor interest in the company's advanced nuclear microreactor technology, which aims to provide a compact, carbon-free power solution as an alternative to traditional large-scale nuclear plants.