StocksUpdatedOriginally published 1 July 2026Updated 2 July 2026
2 min read

SMR Race Intensifies as Oklo Peers Hit Criticality Milestones

Key Facts

1The US DOE approved the Documented Safety Analysis for Oklo's Groves Isotope Test Reactor, lifting the stock.

Amid an accelerating race in the small modular reactor (SMR) sector, Oklo faces intensifying competition as three key peers achieved nuclear criticality ahead of its own July target. According to analyst reports, Antares, Valar, and Deployable Energy have already reached this pivotal technical milestone. This development places Oklo's recent Department of Energy (DOE) safety approval for the Groves reactor into a broader, more competitive industry context where speed of execution is becoming paramount.

The landscape for next-generation nuclear power is broadening, with the DOE selecting 11 different reactor projects for its Reactor Pilot Program (RPP). This diversification highlights a shift from individual company milestones to a sector-wide sprint for commercial viability. While Oklo has maintained a strong regulatory profile, the rapid progress of its peers in the RPP suggests that the first-mover advantage in the SMR space is being contested by multiple well-funded players.

Looking ahead, markets will focus on Oklo's scheduled criticality test in July as a vital benchmark to see if the company can match the technical pace set by its rivals. Investors should monitor upcoming regulatory filings and DOE progress reports for the 11 selected projects, as these will serve as catalysts for OKLO and the broader clean energy sector. The ability to transition from pilot approval to operational criticality remains the key metric for valuation in this high-growth industry.