Avoid the stress of overpaying for a stock or missing an opportunity by using the right tools and insights to evaluate Deep Fission, Inc. before investing.

In this article, we go over a few key elements for understanding Deep Fission, Inc.’s stock price such as:

• Deep Fission, Inc.’s current stock price and volume
• Why Deep Fission, Inc.’s stock price changed recently
• Upgrades and downgrades for FISN from analysts
• FISN’s stock price momentum as measured by its relative strength

About Deep Fission, Inc. (FISN)

Before we jump into Deep Fission, Inc.’s stock price, history, target price and what caused it to recently rise, let’s take a look at some background.

Deep Fission, Inc. develops and deploys small modular nuclear reactors placed deep underground to generate electricity. The company provides small modular nuclear reactors designed for underground installation at a depth of one mile, offering carbon-free energy and capacity solutions. It delivers scalable reactor configurations for onsite power needs or flexible offtake agreements in wholesale power markets, manages the licensing process with regulatory authorities, and supports strategic development for decarbonization and reliability goals. The company also provides advisory and partnership services for deployment and operation of its reactor technology, using artificial intelligence to streamline operations. Deep Fission serves utilities, data centers, heavy industry, the military, government, and large cities. The company was founded in 2023 and is based in Berkeley, California.

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Deep Fission, Inc.’s Stock Price as of Market Close

As of September 04, 2026, 4:00 PM, CST, Deep Fission, Inc.’s stock price was $7.150.

Deep Fission, Inc. is up 0.14% from its previous closing price of $7.140.

During the last market session, Deep Fission, Inc.’s stock traded between $7.040 and $7.380. Currently, there are approximately 55.10 million shares outstanding for Deep Fission, Inc..

Deep Fission, Inc.’s trailing earnings per share are negative, so the stock does not have a meaningful P/E ratio. We suggest investors evaluate other financial metrics to understand its overall valuation.

Deep Fission, Inc. Stock Price History

Deep Fission, Inc.’s (FISN) price is currently up 6.56% so far this month.

During the month of September, Deep Fission, Inc.’s stock price has reached a high of $7.450 and a low of $6.100.

Over the last year, Deep Fission, Inc. has hit prices as high as $19.000 and as low as $6.100.

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What Caused Deep Fission, Inc. Stock’s Price to Rise?

Stock prices are primarily based on seller supply and buyer demand. But have you ever wondered about what other factors affect a stock's price?

When an analyst changes their opinion of a stock by upgrading or downgrading their rating, it often leads to a sudden stock price adjustment. As of September 04, 2026, there were analysts who downgraded Deep Fission, Inc.’s stock and analysts who upgraded over the last month.

Additionally, you'll want to evaluate Deep Fission, Inc.’s financial health and valuation. Investors can use AAII's Value Grade, which combines six key valuation metrics like P/E and P/S ratios for a comprehensive analysis to conduct analysis on Deep Fission, Inc.’s valuation and financial health. This approach mitigates the limitations of single-metric evaluations.

Learn how to evaluate stocks with AAII Grades and Scores with A+ Investor today.

Lastly, news and media coverage as well as recent press reports about the company or its industry may cause stock prices to fluctuate. You can check out the most recent news articles about Deep Fission, Inc. (FISN) by visiting AAII Stock Evaluator.

Relative Price Strength of Deep Fission, Inc.

Relative price strength measures a stock's performance against the market, helping investors identify stocks that are outperforming benchmarks.

For AAII’s Momentum Grade, a weighted relative price strength is calculated. Follow this link to learn more about the Momentum Grade.

As of September 04, 2026, Deep Fission, Inc. has a weighted four-quarter relative price strength of %, which translates to a Momentum Score of and is considered to be NA.

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Deep Fission, Inc. Stock Price: Bottom Line

As of September 4, 2026, Deep Fission, Inc.’s stock price is $7.150, which is up 0.14% from its previous closing price.

AAII advises against making stock decisions based solely on price or past returns. Instead, consider a variety of metrics, fundamentals, and analytics to evaluate a stock like Deep Fission, Inc. stock prices are influenced by market supply and demand and offer just a snapshot of a company's overall health.

Subscribing to AAII's A+ Investor provides access to comprehensive analytics and insights for confident investing.