ERCOT Data Center Queue at 390 GW Weighs on Nuclear Developer Stocks
Texas's data center interconnection backlog is nearly five times the grid's record peak, raising delivery questions that are splitting uranium miners from pre-commercial reactor developers.
ERCOT's interconnection queue swelled to more than 438 GW of large-load requests as of Monday (2026-09-21), with nearly 89% — around 390 GW — attributed to data centers, according to xtb.com. ERCOT's all-time system peak was around 85.5 GW. The queue runs nearly four and a half times that figure, and the gap between theoretical demand and deliverable capacity has been driving skepticism about which nuclear projects will actually get built.6
The pressure has been evident in equities since at least mid-year. NuScale Power and Oklo each fell around 5% in a single session on August 20, 2026, with Centrus Energy down roughly 6%, according to aol.com. The sector has struggled since the start of 2026.4 Truist analyst Christopher Souther, as Yahoo Finance reported in July (2026-07-16), noted that investors are increasingly looking for evidence companies can successfully build, license and deploy reactors — not just sign agreements.3
Physical uranium markets are diverging from the equity narrative. Demand from utilities and producers remains visible, and higher prices in long-term contracts suggest buyers are still paying a premium to secure future supply, xtb.com reported on Monday (2026-09-21). The physical market is not confirming the narrative of weakening demand. The uranium ETF URA gained 1.07% on Tuesday (2026-09-22).6
This split follows a predictable line: uranium miners and fuel suppliers can benefit from tighter nuclear-fuel markets even when pre-commercial reactor developers face higher financing costs and extended development timelines, aol.com observed. Not all nuclear exposure is the same trade.4
The investment case underpinning the sector rests on hyperscaler demand for long-duration clean power. That demand is real. Global data center electricity consumption is projected to reach approximately 565 TWh in 2026, up from 447 TWh in 2025, according to DataM Intelligence estimates cited by Business Insider.2 Vistra, an established nuclear operator, signed 20-year power purchase agreements with Meta covering more than 2,600 megawatts of nuclear output and a separate 20-year deal for 1,200 megawatts tied to its Comanche Peak plant near Fort Worth, oilprice.com reported. Vistra's first-quarter 2026 adjusted EBITDA reached nearly $1.5 billion, up 20% year over year.1
But the ERCOT queue contains projects that will never reach construction. ERCOT has introduced a Batch Zero process requiring customers seeking more than 75 MW to provide substantially more information and demonstrate that projects are genuine and sufficiently advanced, xtb.com reported. The regulator is filtering out speculative queue entries — a tacit acknowledgment that the 390 GW figure is aspirational rather than deliverable.6
Construction timelines are already slipping. The Financial Times, citing SynMax data reported in April (2026-04), found nearly 40% of US data centers scheduled for completion in 2026 could face delays of more than three months. Nationally, data center investment is projected at roughly $500 billion for 2026 alone, with Texas capturing an outsized share, but investment volume and on-time delivery are different metrics.6,1
Reliability concerns add a separate dimension. On July 22, 2026, a transmission disturbance in Northern Virginia sent more than 3 GW of power demand — about 3% of system load at the time — offline almost instantly as data centers switched to backup power, PJM Interconnection reported via Utility Dive.5 Data centers can absorb power at scale, but they can shed it at scale too. ERCOT's interconnection engineers are incorporating that volatility into how they evaluate new large-load applications.
Truist's Souther described the sector's first-of-a-kind projects as moving from concept to execution.3 The physical uranium market, where long-term contract premiums remain intact, appears to be pricing in that progress. The equity market, focused on pre-commercial developers still facing licensing and financing hurdles, is less patient. Uranium miners and established operators are one trade; advanced-reactor developers still waiting to break ground are another — and that distinction is where the pressure is concentrated.