Oklo (OKLO) said Monday it has acquired precision manufacturing and engineering firm ARMEC to expand its capabilities for advanced reactor and fuel manufacturing programs.

Oklo said the acquisition strengthens its vertical integration strategy by bringing key manufacturing and engineering functions closer to its reactor, fuel fabrication and recycling programs as it advances toward commercial deployment.

The transaction closed on June 4, the company said. Financial terms were not provided.

Shares of Oklo were 4.2% higher in Monday premarket activity.