IMSR options show 15:1 call-put ratio

Terrestrial Energy's options activity on Friday, May 22, pointed to a burst of bullish positioning in the stock behind one of the market's newer nuclear-data-center trades. Barchart showed 10,524 IMSR option contracts traded that day and a put-call volume ratio of 0.06, which works out to roughly 9,894 calls against about 630 puts. (barchart.com) The volume landed after a string of company announcements in May that tied Terrestrial Energy more directly to artificial-intelligence infrastructure and to U.S. nuclear licensing progress. Riot Platforms and Terrestrial Energy said on May 6 they signed a memorandum of understanding to develop data centers co-located with Terrestrial's IMSR plants for AI and high-performance computing applications. (barchart.com) ### Why did traders focus on IMSR now? (barchart.com) May 6 was the date of the Riot Platforms agreement that gave Terrestrial Energy a new data-center angle. Riot said the partnership would consider multiple 390-megawatt IMSR plants representing up to 4 gigawatts of nuclear power capacity, with candidate sites including Riot facilities in Texas and Kentucky. May 12 and May 14 added two more company milestones. Terrestrial's investor relations site said the U.S. (riotplatforms.com) Nuclear Regulatory Commission issued a safety evaluation report approving the company's IMSR postulated initiating events topical report on May 12, and the company reported first-quarter 2026 results on May 14. ### What do the options numbers actually show? Barchart's May 22 data is the clearest public snapshot of the imbalance. The service listed a put-call volume ratio of 0.06 and total options volume of 10,524 contracts for IMSR, versus a 30-day average volume of 5,993 contracts. (riotplatforms.com) A 0.06 put-call volume ratio does not show which strikes or expirations dominated the flow, and it does not by itself show whether traders were opening new positions or closing old ones. It does show that call trading overwhelmingly dominated put trading in a stock that closed up 9.96% at $7.62 on May 22. (ir.terrestrialenergy.com) ### What business is Terrestrial Energy pitching to investors? Terrestrial Energy says it is developing Generation IV small modular nuclear plants using its Integral Molten Salt Reactor technology. The company's investor relations page describes the IMSR as its core product, and Riot's May 6 statement said the reactor design would be paired with large-scale data centers aimed at AI and high-performance computing demand. (barchart.com) Riot said the design could also incorporate natural gas as a bridge fuel to accelerate commercial operations and improve power resilience during project buildout. (barchart.com) The companies said they would jointly evaluate additional U.S. sites beyond Riot's existing facilities. ### How does IMSR's size compare with Oklo's? Barchart listed Terrestrial Energy's market capitalization at about $807 million as of the May 22 close. (ir.terrestrialenergy.com) Oklo, another publicly traded advanced nuclear company, had a market capitalization of about $11.46 billion at the May 22 close, according to StockAnalysis. That leaves a wide valuation gap between the two companies even though both are part of the same investor theme around advanced reactors and rising power demand from data centers. (riotplatforms.com) ### What comes next for the company? Aug. 13, 2026 is the next earnings date listed for Terrestrial Energy on Barchart. Riot and Terrestrial said on May 6 that they are evaluating candidate sites in the United States, including locations in Texas and Kentucky, as the partnership moves from memorandum to project screening. (barchart.com) (stockanalysis.com)