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10-K2026-04-15· deepseek-chat

FISN · Deep Fission, Inc. Common Stock

0001104659-26-043870

SEC filing

Summary

The company experienced a significant escalation in operating and net losses during FY2025, driven by aggressive investment in its unproven reactor technology, which has created substantial doubt about its ability to continue as a going concern.

Key takeaways

Full analysis

Escalating Losses from Aggressive Investment in Unproven Technology

FY2025 was defined by a material escalation in operating and net losses as the company aggressively invested in advancing its deep-borehole nuclear reactor technology. Operating income declined to -$21.4 million from -$44.8 thousand in the prior year. Management attributes the increase in operating expenses, including research and development, to the progression of the company's operating plans and an increase in salary and benefits corresponding with higher headcount, as well as increased consulting fees. This strategic investment is aimed at developing an unproven technology, with the company targeting as early as 2027 to seek high-volume commercial licensing with the Nuclear Regulatory Commission (NRC). The net loss widened dramatically to -$61.0 million from -$44.8 thousand, reflecting the full impact of these escalated operating costs. The per-share impact was significant, with diluted earnings per share falling to -$0.57 from -$0.01.

Liquidity Crisis and Going Concern Uncertainty

The financial results precipitated a severe liquidity challenge. Net cash used in operating activities was -$13.1 million, which management states was primarily attributable to increased net losses and changes in working capital, including prepaids, accounts payable, and other current liabilities. Capital expenditures were modest at approximately $43 thousand, driven by additions to property and equipment. This resulted in negative free cash flow of -$13.1 million. Critically, management's discussion outlines that, based on the expectation of continued operating losses, existing cash and cash equivalents together with net proceeds from a 2026 private placement are not expected to be sufficient to operate the business for the next twelve months. This condition raises substantial doubt about the company's ability to continue as a going concern. Management notes that since inception, operations have been financed primarily through the issuance and sale of equity securities and anticipates that future liquidity will principally come from similar sources.

Ambitious Commercialization Pathway Faces Technical and Regulatory Hurdles

The company's strategic narrative is centered on an ambitious, phased plan to commercialize its Gravity Reactor technology. The goal is to seek high-volume commercial licensing with the NRC as early as 2027, progressing from engineering validation to a pilot reactor and finally commercial operation. However, the filing is replete with risk disclosures acknowledging that the technology is unproven and has not been demonstrated in a real-world operating environment. Commercialization depends on overcoming significant technical challenges, such as successful deep vertical borehole drilling, and navigating a complex and uncertain regulatory landscape with the NRC and the Department of Energy. The company is also involved in litigation challenging the NRC's licensing framework, adding another layer of regulatory uncertainty. The vast gap between the current financial reality—characterized by significant losses, no revenue, and a going concern warning—and the 2027 target underscores the high-risk nature of the venture.

Internal Control Failures Lead to Financial Restatement

A significant operational signal from the filing is the identification of material weaknesses in the company's internal control over financial reporting. These weaknesses pertained to a lack of formal controls and standardized procedures for valuing SAFE Notes and for accounting for stock-based compensation expense. These deficiencies led to a restatement of the prior year's (FY2024) financial statements and several interim periods. The errors resulted in an overstatement of the fair value of SAFE Notes and an understatement of stock-based compensation expense. Management states these were non-cash misstatements that did not affect cash flows. The event highlights the challenges of establishing robust financial processes in a complex, early-stage company undergoing significant growth and transaction activity. Management has initiated remediation efforts, including hiring additional financial personnel and implementing new systems, but the effectiveness of these measures will need to be demonstrated over time.