Deep Fission (FISN) Stock Price, News & Analysis
What Changed
Price Move History
- Daily moves over 5%
- 22 63 sessions, June 18, 2026 to September 17, 2026
- Largest daily move
- -21.5% close of June 24, 2026
Company Description
Deep Fission (NASDAQ: FISN) is classified in the specialty industrial machinery industry within the Industrials sector and carries a market capitalization of $471.8M.
FISN has gained 0.0% over the past month. The last closing price was $8.12.
For FY2023, Deep Fission and diluted earnings per share of -$0.01.
This page collects what Stock Titan holds for FISN, including price data, latest news, SEC filings, insider trading activity, financial highlights, upcoming events, and short interest trends.
Stock Performance
Deep Fission (FISN) closed at $8.12 on September 17, 2026. Over the past month, the price has gained 0.0%.
FISN Metrics & Rankings
Price returns through September 17, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
Deep Fission has 10 recent news articles, with the latest published 2 days ago. Of the recent coverage, 5 articles coincided with positive price movement and 4 with negative movement. Key topics include offering. View all FISN news →
SEC Filings
Deep Fission has filed 10 recent SEC filings, including 4 Form 4, 3 Form 8-K, 1 Form 10-Q, 1 Form 424B4. The most recent filing was submitted on August 3, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all FISN SEC filings →
Financial Highlights
Diluted earnings per share stood at -$0.01. With a current ratio of 0.01, short-term liquidity bears monitoring.
Upcoming Events
First reactor delivery
First commercial operations
Deep Fission has 2 upcoming scheduled events. The next event, "First reactor delivery", is scheduled for January 1, 2027 (in 105 days). Investors can track these dates to stay informed about potential catalysts that may affect the FISN stock price.
Short Interest History
Short interest in Deep Fission (FISN) currently stands at 946.2 thousand shares, up 8.0% from the previous reporting period, representing 2.6% of the float. Since June 2026, short interest has increased by 14.9%. This relatively low short interest suggests limited bearish sentiment.
Days to Cover History
Days to cover for Deep Fission (FISN) currently stands at 4.6 days, up 30.3% from the previous period. This days-to-cover ratio represents a balanced liquidity scenario for short positions. The days to cover has increased 356% over the past year, indicating either rising short interest or declining trading volume. The ratio has shown significant volatility over the period, ranging from 1.0 to 4.6 days.
FISN Company Profile & Sector Positioning
Deep Fission (FISN) operates in the Specialty Industrial Machinery industry within the broader Industrials sector and is listed on the NASDAQ.