Deep Fission's first binding power deal guarantees no sales; stock falls 23%

Deep Fission was incorporated in Delaware in 2023 and became public through a reverse merger with a shell company, in which the private Deep Fission was treated as the buyer.¹ Its Gravity reactor uses a common design, cooled by pressurized water and fueled with standard low-enriched uranium. It sits in a borehole about one mile down, so the water and rock above it supply pressure, cooling and shielding.² The Energy Department picked it for its Reactor Pilot Program, and the company broke ground on its pilot reactor at the same Kansas park in December 2025.³

The field is crowded. The annual report names advanced-reactor rivals TerraPower, X-energy, Kairos Power and Oklo, and newer small-reactor makers NuScale Power and Last Energy.¹ A commercial plant needs a license from the Nuclear Regulatory Commission, the federal safety regulator, plus Kansas approvals. Deep Fission says it has not yet built or run a commercial reactor or earned any revenue.²

The company raised $80 million in February 2026 by selling 5,333,333 shares at $15.00 each. It then sold 2,500,000 shares at $16.00 in its June public offering, netting $34.3 million, and began trading on Nasdaq on June 18, 2026.¹ Spending jumped after it went public. The second-quarter net loss was $31.0 million, against $3.8 million a year earlier, and operating expenses for the first half reached $53.4 million.² Cash was $93.0 million on June 30, 2026, up from $23.7 million at the end of 2025, and total liabilities were only $8.6 million.³

Deep Fission and the park's authority signed a letter of intent in December 2025. It set out their work on the pilot and their plan for a full-scale commercial project at the same site.¹ At that time the company aimed to reach criticality, the point where a reactor keeps its own chain reaction going, by July 4, 2026, pending Energy Department approval. The annual report later said it had updated its milestones, including the timing of criticality, and the October slides now call 2026 a non-nuclear year.² In June 2026 it pointed to up to 18.5 gigawatts of customer interest. Those letters do not commit anyone to buy power, and either side can walk away without penalty.³

On September 24, 2026, a short seller, Iceberg Research, published a report questioning the company's economics and its path to commercial sales. The stock closed at $6.94 that day, down from $7.79 the day before.¹ The company called the report highly misleading and said it stands behind its public filings. Plaintiffs' law firms then announced investigations, including Kehoe Law Firm and Pomerantz, which put out another notice on October 20.² One firm, Johnson Fistel, says it is probing how the company built a prospectus estimate that it needed about $138 million more to deploy its first commercial reactor. These are investigations, not filed lawsuits, and the June quarterly report, which predates the short report, recorded no liability for any legal claim.³ The stock slid from $7.07 on September 15 to $3.66 on October 19, the last close before the contract news.⁴

The power purchase agreement was completed on October 16, 2026 and announced on October 20. The buyer is the Great Plains Development Authority, a quasi-municipal body, meaning a local public entity, that owns the park in Parsons, Kansas.¹ The first phase covers up to 150 megawatts with a target start of September 30, 2028, and later phases could reach 2,000 megawatts by 2031 if demand keeps growing.² The slides call it a 2-gigawatt agreement, which is the full build-out, not the first phase.³

Each side promises less than the headline number suggests. Deep Fission is bound to pursue the project and to supply power once it is licensed and operating, subject to the contract's terms.¹ The authority buys power to meet its tenants' needs, up to the contracted amount, with no minimum purchase obligation. It may also hand its purchase duties to qualifying tenants.² So the contract guarantees no sales, and the company itself lists the timing and volume of purchases, and whether revenue comes at all, as uncertain. Power can flow only after federal licensing, Kansas approvals and delivery arrangements, and the project may be delayed, shrunk or never finished.³

Against the company's size, the deal is large in megawatts but has no dollar value yet. At the $3.66 close before the news, the 58,905,938 shares were worth about $215.6 million; at $2.81 they are worth about $165.5 million.¹ There is no revenue, operating profit or positive cash flow to measure it against. The company expects at least a one-year lag between starting construction and booking revenue.² The slides' example later-model reactor makes up to 15 megawatts and costs $84 million to build at 2024 prices, so 150 megawatts implies about 10 reactors and at least $840 million, about 9 times June's cash; the prospectus put a first commercial reactor at about $152 million.³

The example assumes 60% of the cost is borrowed at 8% at the project level, which would leave about $336 million of equity for 10 reactors before a 30% investment tax credit that the slides assume is sold at 90%, worth about $227 million once claimed; for certain projects the company plans to keep only an ownership interest in the project company.¹ It also shows $20 million of revenue a year per reactor, but that rests on a $110 price per megawatt-hour, and the slides say these figures only illustrate internal estimates and assumptions.²

The reported losses are mostly cash, with one large non-cash piece. Of the $52.4 million net loss for the first half, $17.7 million was stock-based pay, which costs no cash but dilutes owners.¹ Cash used in operations was $42.5 million in the half, and $13.2 million of that went to prepaid expenses; the company also says it has already paid about $9.2 million for uranium fuel. Without the prepayments, the half's cash use was about $29.3 million.² The company also restated earlier accounts to fix errors in valuing early investor notes and stock pay. Its disclosure controls were not effective at June 30 because of material weaknesses.³

Cash is the limit. At the first half's pace, the company used about $21.2 million a quarter, and it had $93.0 million at June 30.¹ It also had a $4.1 million borehole casing purchase commitment, and it must buy the Kansas site for about $5 million if the regulator grants a commercial license there.² Management says its cash will not fund the next twelve months and that there is substantial doubt it can continue as a going concern. It also says it needs substantial additional capital to deploy its first commercial reactor.³

Debt ratios do not apply here: there are no earnings to measure debt against, total liabilities were $8.6 million, and the company has no off-balance-sheet financing.¹ Any future borrowing could carry covenants that restrict its operations.²

New money will likely mean new shares, and the quarterly report says equity raises would dilute current holders.¹ There were 58,905,938 shares on July 27, 2026. At June 30 there were also 8,099,083 options, 688,287 unvested restricted stock units and 704,084 warrants whose exercise depends on future events, about 68.4 million shares in all.² Stockholders added 5,000,000 shares to the equity pay plan on July 17, 2026, and the plan grows by 5% of outstanding shares each January from 2027. February's buyers paid $15.00 a share and June's paid $16.00, so today's $2.81 is about 82% below the offering price.³

The market's verdict came during the day. The stock traded at $3.84 at 10:59 a.m., just before the call, then at $3.075 by 12:30 p.m., and it was $2.81 at the close, down 23.2% from $3.66 the day before.¹ The S&P 500 fund rose 0.5% over the same span, Oklo rose about 1.1% and NuScale fell about 1.8%, so the drop was Deep Fission's own.² Our price file starts in mid-September, so we cannot confirm a full year's trading range.³

The bull case starts with the contract itself: the company's first binding sales deal, at its own pilot site, with a public landlord that can pass the power to park tenants and could grow it to 2,000 megawatts.¹ The company has also checked off steps: the Energy Department's conditional approval of a nuclear safety design agreement, which the slides date August 6, 2026, a non-nuclear prototype run on September 3, 2026, and fuel already bought.² At $2.81, June's cash equaled about 56% of today's market value, though some of it has been spent since.³

The bear case, strongest point first, is money. At least $840 million of example building cost (more if early reactors cost the roughly $152 million the prospectus estimated) sits against a going-concern warning, and the low share price makes new shares costly to sell.¹ Second, the contract pays nothing for certain, and it depends on tenant demand from tenants who are not named. Third, timelines have slipped: the July 4, 2026 criticality goal passed, and September's demonstration went to only about 100 feet, testing installation, not full-depth drilling.² The slides target only up to 5 megawatts by December 2027, so meeting the 150-megawatt first phase by September 30, 2028 would mean adding about 145 megawatts in nine months.³ Fourth, the short report, the law-firm investigations and the restated accounts add legal and trust risk.⁴

The company's own forward case is a set of goals, not promises. It targets up to 5 megawatts of commercial power by December 2027 and says its focus is delivery at scale by 2028.¹ It is working with drilling contractor Youngquist Brothers to test deep, wide boreholes, and it aims for six months from drilling to delivery for one standard reactor.² It plans to apply for a commercial license in the first half of 2027. For some projects it plans to keep a stake in the project company and to earn fees for licensing its technology.³

The first dated test is the insider lock-up described in the annual report, which ends six months after the June 18, 2026 listing. After that, more shares could reach the market.¹ The next quarterly report will show how much cash was left at the end of September. After that come the license application in the first half of 2027, the 5-megawatt goal in December 2027 and the first-phase target of September 30, 2028.² The bear view is wrong if the company raises enough money without heavy dilution, names tenants with firm demand, or files its license on time. We expect the stock to stay below its $3.66 pre-news close into early next year, because the cash need and the lock-up come before any contract revenue.³

Neither the release nor the slides give what the authority will pay per megawatt-hour. The $110 in the slides is an example assumption, not this contract's price.

Sales depend on demand from park tenants, but no tenant or tenant demand figure is named.

The release says only that the deal is subject to its terms and conditions. It does not say what happens if the September 30, 2028 date is missed or how either side can exit.

The company says it needs substantial additional capital but names no investor, lender or amount for this project.

The company held an investor call on October 20, but only the slides were filed, so management's remarks and answers are not known.

The July 27 cover count of 58,905,938 shares is 840,000 below the 59,745,938 on the June 30 balance sheet, and the quarterly report does not explain why.