Deep Fission Pursues Nasdaq IPO as Cash Burn Rises and Reactor Timeline Slips

New updates have been reported about Deep Fission.

Deep Fission is shifting from last year’s stalled reverse-merger listing to a conventional Nasdaq IPO, seeking up to $157 million at $24 to $26 per share and implying a valuation of about $1.66 billion. The company had previously completed a reverse merger with Surfside Acquisition and became an SEC-reporting entity, but its stock never traded, leaving it effectively private despite earlier plans for an OTCQB listing.

The new S-1 filing, dated May 20, shows a weaker operating picture than the company outlined in December, including a delayed path to its first subterranean reactor for AI data centers and the removal of its prior target for achieving reactor criticality by July 2026. Deep Fission now declines to provide any updated estimate for that milestone, signaling greater technological uncertainty around both the reactor design and the drilling capabilities needed to support it.

Financially, Deep Fission’s position has deteriorated, with its accumulated deficit rising to $88.1 million as of March, up from $56.2 million just a few months earlier, and cash and equivalents shrinking by $6.4 million, or roughly 7%, in the last month and a half of reported data. The S-1 repeats the “going concern” warning first disclosed in December, explicitly stating that without a successful IPO the company may exhaust its cash within 12 months.

To sustain its strategy, Deep Fission highlights that it has launched drilling of the first of three test wells, starting in March, to gather subsurface data down to 6,000 feet using an eight-inch-diameter borehole. However, commercial deployment will require far larger boreholes—30 to 50 inches in diameter and about a mile deep, larger than typical oil and gas wells—and management acknowledges that until it proves this capability at scale, the reactor design cannot be finalized.

Despite these risks, the company has attracted an $80 million equity infusion, including $20 million from data center developer Blue Owl, which also signed a non-binding memorandum of understanding for potential future power plants to serve AI workloads. Even so, that capital did not eliminate the going-concern warning, underscoring how dependent Deep Fission’s strategy is on public-market funding and how limited its current commercial traction appears.

Deep Fission declined to comment to TechCrunch, citing the IPO quiet period, leaving investors to interpret the S-1 without additional guidance on technology progress or customer development. The company’s push into the public markets appears timed to ride surging investor interest in nuclear fission and AI infrastructure, even though it trails some listed peers in revenue generation and regulatory progress, raising questions about whether its valuation reflects execution readiness or broader sector enthusiasm.