Deep Fission Securities Investigation | FISN
Did You Lose Money Investing in Deep Fission (FISN)?
Kehoe Law Firm, P.C. is investigating potential securities claims on behalf of investors who purchased Deep Fission, Inc. (“Deep Fission” or the “Company”) (NASDAQ: FISN) shares in or traceable to the Company’s June 2026 initial public offering (“IPO”) and/or Deep Fission shares in the open market following the IPO.
In its IPO, Deep Fission sold 2.5 million shares at $16 per share in the offering, raising $40 million in gross proceeds. Before the offering, the Company promoted a target levelized cost of electricity of $50–$70 per megawatt-hour. Its June 2026 prospectus later disclosed reactor-level estimates that included approximately $152 million in capital costs for an initial commercial reactor and approximately $84 million per reactor for a planned larger configuration. The Company described those figures as reflecting certain estimates and assumptions then being used internally by management.
After the offering, Deep Fission continued to make public statements about the expected cost and speed of deploying its reactors. In September 2026, the Company described drilling at the required diameter and depth as routine commercial work and said its underground design was expected to reduce construction costs and shorten schedules. It also stated that it was targeting commercial deployment as early as 2027.
On September 24, 2026, Iceberg Research published a short-seller report challenging Deep Fission’s projected reactor economics and commercialization plans.
Following publication of the short-seller report, Deep Fission’s stock price fell approximately 11%, declining from a prior-day close of $7.80 to close at $6.95 per share.
Deep Fission Investors: Contact Kehoe Law Firm
If you purchased Deep Fission (FISN) shares in or traceable to the June 2026 IPO and/or in the open market after the IPO, you are encouraged to complete Kehoe Law Firm’s confidential Stockholder Information Request Form or send us a message to learn more about the investigation and your potential legal rights.
For a free, no-obligation legal evaluation, contact:
Michael Yarnoff, Esq.
(215) 792-6676, Ext. 804
[email protected]
[email protected]
About Kehoe Law Firm, P.C.
Kehoe Law Firm, P.C. is a nationally recognized, plaintiff-side class action law firm representing investors, consumers, and employees in matters involving securities fraud, corporate misconduct, mergers and acquisitions, antitrust violations, whistleblower claims, data breaches, consumer fraud, employment law violations, and retirement-plan mismanagement. Its attorneys have served as lead or co-lead counsel in major securities cases, recovering more than $10 billion for institutional and individual investors.
There is no cost or obligation to speak with the firm, and there are no upfront fees or litigation costs. We handle class action matters on a contingency-fee basis. Any attorneys’ fees or expenses sought in connection with a recovery are subject to court approval.
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