On September 17, X-Energy rose 7.1% in regular trading, trading at 16.305 USD/share, with turnover of $22.50 million. The rebound comes after the stock declined 3.03% in the prior session, as a key UK regulatory milestone provided fresh upside momentum.

On the news front, X-Energy and UK energy giant Centrica announced that UK regulators formally accepted X-Energy's Xe-100 small modular reactor into the generic design assessment process. The technical, safety, and environmental evaluation is expected to span roughly three years. The joint venture aims to construct up to 6 gigawatts of new nuclear capacity across 10 to 20 British power stations, marking a significant expansion of X-Energy's international pipeline beyond its existing 11.5-gigawatt commercial pipeline in the US.

Within the Heavy Electrical Equipment sector, the overall performance was strong. Among individual stocks, INNIO Holding up 9.81%, Forgent Power Solutions up 7.75%, NuScale Power up 5.6%, GE Vernova up 4.8%, Bloom Energy up 4.11%, reflecting broad sector tailwinds.

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