TeraWulf Reaffirms 2026 Lake Mariner Delivery as Power Demand Stays Strong

TeraWulf's CEO said demand for 2028 and 2029 power remains strong and reaffirmed a 2026 Lake Mariner delivery. Company filings support the construction milestone but leave customer financing and future capital choices as risks.
TeraWulf chief executive Paul Prager used a social-media update to emphasize demand for powered data-center capacity and to reaffirm a near-term construction milestone. He said demand for 2028 and 2029 power remained extremely strong and that the next Lake Mariner building leased to Fluidstack was on track for delivery this quarter.
The delivery claim has support in TeraWulf's formal disclosures. In its second-quarter results, the company said the first data hall in CB-4 had entered commissioning and that phased delivery and rent commencement were expected during the second half of 2026. It also reported 102 megawatts of revenue-generating critical IT capacity online at Lake Mariner after completing CB-3 in early July.
TeraWulf had another 336MW under construction across CB-4 and CB-5 at the time of that report. CB-5 was targeted to begin phased delivery in early 2027. The distinction matters because one building reaching a delivery milestone does not mean the entire contracted expansion is operating or producing rent.
The customer and credit structure reduce some risk but do not remove execution risk. Fluidstack leases the Lake Mariner capacity, and completion of CB-3 activated $600 million of Google credit support for Fluidstack's lease obligations. TeraWulf still must commission and deliver later phases within schedule and cost guidance. Its second-quarter materials placed construction costs at $8 million to $10 million per critical IT megawatt for the WULF Compute program.
Prager also said TeraWulf would not take on customers' financing risk and that shareholders would not be diluted for the discussed projects. Investors should treat that as management's current financing position, not an unconditional guarantee about every future capital decision. Data-center development is capital intensive, and financing needs can change with construction costs, customer terms and project timing.
The company's balance sheet provides context. TeraWulf reported about $3.0 billion of cash and restricted cash at the end of the second quarter. Restricted cash is not freely available for every corporate purpose, so the combined figure should not be read as fully discretionary liquidity. The same quarter produced $44.8 million of revenue, including $31.9 million from high-performance-computing leases, showing that leasing had already become a material operating business rather than only a future plan.
The market's reported reaction spread to other data-center developers, but TeraWulf had the clearest company-specific catalyst: a reiterated delivery timetable and management commentary on future power demand. The durable evidence will arrive when CB-4 is accepted by the tenant and rent begins. If delivery slips, the revenue start moves with it; if it lands on schedule, TeraWulf adds another proof point that it can turn energized sites into contracted computing infrastructure.
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