# Oklo completes reactor build and reports first revenue > Live situation record from CLSTR: https://clstr.news/situations/oklo-nuclear-reactor-development > Updated: 2026-09-09T19:20:00.000Z. Sources: 11. Developments: 7. In August 2026, Oklo Inc. reached a major technical milestone when its Groves Isotope Test Reactor in Lockhart, Texas, achieved first criticality on August 6. This controlled, self-sustaining nuclear chain reaction occurred less than a year after breaking ground on the greenfield site, making it the first project under the U.S. Department of Energy’s Reactor Pilot Program to reach criticality on privately owned land. Following the achievement, Oklo announced it completed construction of the Groves One pilot reactor in 229 days. CEO Jacob DeWitte noted this is the “fastest U.S. non-military reactor build completed under modern Department of Energy (DOE) and environmental regulations.” The company intends to use this project as a repeatable blueprint for the AI and manufacturing sectors, with plans to generate revenue from an Idaho radiochemistry lab in early 2027. Financially, Oklo reported its first-ever quarterly revenue of approximately $1.21 million, primarily from services, significantly exceeding analyst estimates of $0.09 million. However, the company continues to operate at a loss, reporting a year-to-date net loss of $81.6 million through the second quarter of 2026. While the company maintains $3 billion in liquidity, its stock has experienced volatility, recently trading around $43 after reaching a record high of $174.14 in October 2025. Oklo is not yet a commercial power provider; its Aurora powerhouses remain in development with deployment targets for 2027 and 2028. Recent insider activity includes stock sales by John Hanson in August and General Counsel Vivek Narayanadas in September, both to cover tax withholding obligations. ## Claims - Oklo reported its first-ever quarterly revenue of $1.21 million. (single source) - Oklo reported a net loss of approximately $48.5 million. (single source) - The Oklo Groves Reactor achieved first criticality, sustaining a controlled nuclear chain reaction. (single source) - First Trust Advisors LP reduced its stake in Oklo Inc. by 65.1% during the first quarter. (single source) - CEO Jacob Dewitt sold 140,000 shares of Oklo stock on June 1st. (single source) - CFO Richard Craig Bealmear sold 73,081 shares of Oklo stock on June 1st. (single source) ## Timeline ### 2026-09-09: Oklo Inc. faces stock volatility amid microreactor development Nuclear microreactor developer Oklo Inc. faces stock volatility as it works toward commercial deployment, amid recent insider share sales by its General Counsel. 3 sources. https://clstr.news/cluster/oklo-inc-faces-stock-volatility-amid-microreactor-development ### 2026-08-23: Oklo Inc. reports first revenue amid nuclear reactor milestones Nuclear reactor developer Oklo Inc. reported its first revenue of $1.2 million and achieved first criticality at its test reactor, though commercial power deployment is targeted for 2028. 2 sources. https://clstr.news/cluster/oklo-inc-reports-first-revenue-amid-nuclear-reactor-milestones ### 2026-08-17: Oklo completes modern U.S. nuclear reactor build in 229 days Oklo completed construction of its Groves One pilot reactor in 229 days, setting a modern U.S. record for non-military nuclear builds under current regulations. 2 sources. https://clstr.news/cluster/oklo-completes-modern-us-nuclear-reactor-build-in-229-days ### 2026-08-11: Oklo Inc. reports first quarterly revenue and reactor milestone Oklo Inc. reported its first quarterly revenue of $1.21 million and achieved first criticality with its Groves Reactor, despite reporting a $48.5 million net loss. 5 sources. https://clstr.news/cluster/oklo-inc-reports-first-quarterly-revenue-and-reactor-milestone ### 2026-08-08: Oklo achieves first criticality at Texas isotope reactor Oklo Inc. reached first criticality at its Groves Isotope Test Reactor in Texas less than a year after groundbreaking, marking a milestone for private nuclear projects under the U.S. DOE Pilot Program. 3 sources. https://clstr.news/cluster/oklo-achieves-first-criticality-at-texas-isotope-reactor ### 2026-08-05: Oklo nuclear firm posts first revenue after Texas reactor hits criticality Oklo posted its first quarterly revenue of $1.2 million after its Texas Groves reactor reached criticality, while planning an Aurora powerhouse for 2028 and holding $3 billion in cash. 2 sources. https://clstr.news/cluster/oklo-nuclear-firm-posts-first-revenue-after-texas-reactor-hits-criticality ### 2026-07-25: Oklo receives US DOE authorization to load fuel at Groves test reactor Oklo secured US DOE startup authorization for its Groves test reactor, enabling fuel loading and startup testing toward first criticality and domestic isotope production. 2 sources. https://clstr.news/cluster/oklo-receives-us-doe-authorization-to-load-fuel-at-groves-test-reactor --- Cite as: Oklo completes reactor build and reports first revenue. CLSTR, https://clstr.news/situations/oklo-nuclear-reactor-development