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Deep Fission Nuclear raised $30M in a private placement and completed a go-public transaction, enabling the deployment of their underground reactor by 2026.

PUBLIC · FISNSep 08, 2025

Amount Raised

$30 Million

Round Type

Post-IPO Equity

BerkeleyEnergyRenewable Energy

Description

Deep Fission Nuclear completed a $30M financing in a reverse merger with Surfside Acquisition Inc. This funding allows the company to focus on building its pilot reactor as part of the Department of Energy’s Reactor Pilot Program. The initiative aims for criticality by July 4, 2026. With technology that promises to cut costs significantly, Deep Fission is poised to address the growing energy demand.

Quick answer

Deep Fission raised $30 Million in a Post-IPO Equity round, dated September 8, 2025. Deep Fission is based in Berkeley, California, United States.

How much did Deep Fission raise?
Deep Fission raised $30 Million in a Post-IPO Equity round on September 8, 2025.
What does Deep Fission do?
Deep Fission is a pioneering nuclear energy company revolutionizing the energy landscape by positioning modular nuclear power plants a mile underground.
Where is Deep Fission based and how big is it?
Deep Fission is based in Berkeley, California, United States. Fundz records about 60 employees.
Who are the decision-makers at Deep Fission?
Fundz holds 2 contacts at Deep Fission. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in Energy and Renewable Energy around the same time

Companies in the same sectors as Deep Fission that raised within 45 days of this round, from Fundz verified event records.

  • MarkeDroid raised $348K (Funding Round) on October 23, 2025.
  • Redwood Materials raised $350M (Series E) on October 23, 2025.
  • Electra Battery Materials Corporation raised $35M on October 22, 2025.
  • Peregrine Energy Solutions raised $130M (Funding Round) on October 22, 2025.
  • Sizable Energy raised $8M (Funding Round) on October 22, 2025.
  • Largo raised $6M on October 22, 2025.

Who to call at Deep Fission, and when

A new round usually means Deep Fission is about to hire and buy. The teams that reach out first get the meeting.

  • An alert the day Deep Fission raises, hires an executive or expands, scored against what you sell
  • The decision-makers there, with verified emails
  • Who you already know at Deep Fission, from your own LinkedIn network

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Company Information

Company

Deep Fission

Location

2831 Garber Street

Berkeley, California, United States

About

Deep Fission is a pioneering nuclear energy company revolutionizing the energy landscape by positioning modular nuclear power plants a mile underground. Founded by Elizabeth and Richard Muller in 2023, the company leverages traditional reactor designs in unconventional environments to enhance safety and reduce costs. Their innovation aims to provide clean and affordable nuclear power in response to climate change. Deep Fission is committed to advancing clean energy and global energy security.

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Related People

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Deep Fission raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

145 of these a day, filtered to the companies you pick, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.