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Deep Fission, Inc. shares rise 24.54% on Tuesday in US trading

Published by Global Banking & Finance Review

Posted on October 28, 2026

2 min read
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FISN 2.69 +24.54% as of 28 Oct 2026, 21:16 GMT, delayed 15 min
Previous close
2.16
Open
2.17
Day range
2.17 – 2.72
Volume
619.7k
Market cap
—

Source: Eulerpool. The figures in this article were checked against this snapshot before publication.

Deep Fission, Inc. Common Stock (ticker: FISN) on its US listing has seen notable price movements over the past two weeks. The earliest session shown, on Wednesday, saw the stock close at USD 3.85. On Thursday, the shares closed at USD 3.65, a decrease of 5.19% on the day. The downward trend continued into Friday, with a close at USD 3.45, down 5.48% from the previous session.

The following Monday, the stock recovered slightly, closing at USD 3.66, a gain of 6.09%. However, on Tuesday, the shares dropped sharply to USD 2.81, a fall of 23.22%. The next Wednesday, the stock closed at USD 2.63, down 6.41%. Thursday saw a further decline to USD 2.41, a decrease of 8.37%. On Friday, the shares ended at USD 2.3, down 4.56%. The most recent Monday session closed at USD 2.16, a drop of 6.09%.

On Tuesday, 27 October 2026, Deep Fission, Inc. shares closed at USD 2.69, marking a 24.54% increase from the previous close. The session opened at USD 2.17, reached a high of USD 2.72, and a low of USD 2.17. Trading volume for the day was 619,686 shares.

Deep Fission, Inc. is listed in the United States and trades in US dollars. The company’s sector is not specified, and it is not currently included in any major indices.

No verified reason for the share price movement on Tuesday could be established at the time of publication.

SessionClose (USD)Change
Wednesday3.85—
Thursday3.65-5.19%
Friday3.45-5.48%
Monday3.66+6.09%
Tuesday2.81-23.22%
Wednesday2.63-6.41%
Thursday2.41-8.37%
Friday2.3-4.56%
Monday2.16-6.09%
Tuesday2.69+24.54%
Deep Fission, Inc. Common Stock — daily FISN Delayed

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