US Stock Market Move | Nuclear energy company Deep Fission (FISN.US) received a warm welcome on its first day of trading, with its stock price triggering a circuit breaker at one point.

date
22:57 18/06/2026
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GMT Eight
Deep Fission debuts on the US stock market, with the stock price rising after opening. It reaches a high of $18.8 and briefly triggers a circuit breaker.
On Thursday, nuclear energy company Deep Fission (FISN.US) made its debut on the US stock market, with the stock price rising after opening, reaching a high of 18.8 US dollars and triggering a circuit breaker. The IPO price was 16 US dollars. As of the time of writing, the stock has risen more than 5%, trading at 16.8 US dollars. Deep Fission is an American advanced nuclear energy technology company, mainly developing small modular reactors (SMR) deployed in deep underground boreholes. The company aims to use underground natural pressure and geological structures to replace some traditional nuclear power plant facilities, thereby reducing construction costs and increasing safety. With the rapid growth in electricity demand driven by AI data centers, Deep Fission sees advanced nuclear energy as one of the important power supply solutions for future large-scale computing centers.