Nuclear energy startup Deep Fission is once again attempting to go public, this time targeting a Nasdaq IPO with a valuation of up to $1.66 billion. This move follows a previous, largely unsuccessful attempt to enter the public market via a reverse merger with a shell company, which resulted in the firm becoming a reporting entity without its shares ever actually trading on an exchange. The company is now seeking to raise $157 million, a significant jump in ambition for a firm that faced difficulty securing a $15 million funding round just one year ago.

Despite the aggressive valuation, the company’s financial health remains a point of concern. Recent regulatory filings include a ‘going concern’ warning, indicating that the startup could exhaust its cash reserves within the next year if the IPO fails to materialize. Financial disclosures reveal that the company’s deficit has ballooned to $88.1 million, up from $56.2 million in late 2023, while cash reserves continue to dwindle. While the firm recently secured an $80 million equity investment, including backing from data center developer Blue Owl, the underlying fiscal instability persists.

Technical progress also appears to be lagging behind the company’s ambitious goals. The timeline for achieving criticality in its subterranean reactors has been pushed back, with the company no longer providing a specific estimate for when it might reach this milestone. Currently, the startup is focused on drilling test wells to collect geological data, though these efforts are on a much smaller scale than what would be required for commercial operations. Engineers face the daunting task of drilling massive, deep boreholes that exceed standard industry dimensions, a challenge that remains a significant hurdle to finalizing the reactor’s design.

Industry analysts note that the push for a high-valuation IPO may be driven more by market enthusiasm for nuclear energy than by concrete technical or commercial milestones. While other players in the sector have successfully gone public while generating revenue and advancing through regulatory licensing, Deep Fission remains in the early stages of development. As the company moves forward with its Nasdaq bid, investors are left to weigh the potential of subterranean fission against the stark realities of the startup’s current financial and technical trajectory.