Deep Fission Inc. rose 53.0% on Monday, November 9, 2026, on 6,300,800 shares, 11 times its average daily volume. No headline about FISN came out that day or the day before in the news feeds we follow, so the move may come from news we don't track, the sector or trading alone.
Deep Fission Inc. (FISN:NASDAQ) closed at $2.06 on November 13, 2026, down 0.96% on the day. The stock trades 89.2% below its 52-week high of $19.00 and 43.1% above its 52-week low of $1.44. Over the past year, it lost 85.9%. Deep Fission Inc. is part of the Technology sector.
In 103 trading sessions since June 22, 2026, FISN closed higher on 40 days (39%). Its best day was November 9, 2026 (+52.97%) and its worst was November 5, 2026 (-32.13%). The stock moved 10% or more in a single session 19 times. It opened at least 5% above the previous day's high 1 time.
Deep Fission is revolutionizing the energy landscape with innovative technology that places a small modular pressurized water reactor in a borehole approximately one mile underground. The company's Gravity Nuclear Reactor¿ approach combines established pressurized water reactor technology with a novel underground deployment model designed to simplify construction, enhance safety, and support rapid, scalable commercial deployment. Founded and led by a team of experienced scientists, engineers, and entrepreneurs, Deep Fission is focused on delivering reliable, low-carbon baseload power to meet growing electricity demand from utilities, industrial customers, and data centers. The company is currently advancing the development of its first reactor project in Parsons, Kansas and was selected for the Department of Energy's Reactor Pilot Program.
Find more stocks like FISN with the Spikes, Gaps, Breakouts and Performance Tracker scanners.
Based on end-of-day data. For information only, not investment advice.