Key takeaways
- Vistra says its 20-year power-purchase agreement with Amazon Web Services covers 1,200 MW of carbon-free power from Comanche Peak.
- Delivery is expected to begin in the fourth quarter of 2027 and ramp to the full contracted amount by 2032.
- The contract includes options to extend for up to another 20 years.
- Vistra’s public filing does not identify a receiving data-center campus, a dedicated transmission line or a delivery point.
- Separate reporting describes proposed Amazon data-center development near Comanche Peak, but that does not by itself prove a physical one-to-one connection to the PPA.
What Vistra has confirmed
In its first-quarter 2026 filing, Vistra told the SEC that it entered a 20-year agreement with AWS in September 2025. The contract covers 1,200 MW of carbon-free power from the Comanche Peak Nuclear Power Plant in Texas.
The same filing gives the schedule: Vistra expects delivery to begin in Q4 2027 and reach the full contracted amount by 2032. It also says the parties have options to extend the PPA for as much as 20 additional years.
Those are the deal’s firm public parameters. The filing does not disclose pricing, annual energy volume, a specific AWS campus, a transmission path or whether the arrangement is financial, physical or a blend of the two.
How large is 1.2 GW?
Comanche Peak has two reactors. Vistra has previously described each unit as designed for 1,200 MW, making the PPA’s contracted capacity equivalent in nameplate scale to one unit and roughly half of the station’s combined design capacity.
That comparison should not be read as a claim that one reactor is dedicated to AWS. The filing describes power supplied from the plant; it does not assign a named unit or say that electricity will travel over an exclusive wire to an AWS facility.
The nearby Amazon projects are a separate fact pattern
Amazon is pursuing data-center development near the plant. In February 2026, Data Center Dynamics reported that Somervell County moved forward with a development agreement involving Amazon Data Services. The reported proposal would sit on Vistra property adjacent to Comanche Peak, subject to final lease terms, and could include as many as 18 buildings across about 435 acres with up to $5 billion of investment.
The same report separately described Project Spectrum as a Hood County development near the nuclear plant. Treating that name as interchangeable with the Somervell County proposal would collapse two public records into one. More importantly, neither local siting report changes what Vistra disclosed about the PPA: its SEC filing does not name either campus as the contract’s delivery point.
For readers tracking data-center power, this distinction matters. A corporate PPA can support a buyer’s electricity procurement without proving that a particular facility has an approved grid connection, a dedicated line or 1,200 MW of load. Those project-level details require separate utility or interconnection records.
The plant licenses cover the initial term
The Nuclear Regulatory Commission renewed both Comanche Peak operating licenses in July 2024. Unit 1 is licensed through February 2050 and Unit 2 through February 2053.
On Vistra’s stated schedule, a 20-year term beginning in late 2027 would run to roughly 2047, within both current license periods. The optional extension is different: exercising a full additional 20 years would go beyond the licenses now in place, so the option should not be read as a guarantee of plant operation through the late 2060s.
Milestones to watch
| Milestone | Publicly stated timing | What it means |
|---|---|---|
| PPA announced | September 2025 | Vistra disclosed the 20-year AWS agreement |
| Initial delivery | Q4 2027 | Contracted delivery is expected to begin |
| Ramp period | 2028–2031 | Delivery rises toward the contracted maximum |
| Full contracted amount | 2032 | Vistra expects to reach 1,200 MW |
| Initial term ends | Roughly 2047 | Based on a 20-year term starting in late 2027 |
The next useful disclosures will be project-specific: a named delivery point, utility studies, interconnection approvals and construction milestones. Until those appear, the defensible reading is narrower than the original headline cycle: AWS has contracted for 1,200 MW from Comanche Peak, but the public PPA disclosure does not establish a dedicated nuclear-to-campus connection.
Sources
This article was researched and fact-checked against the following sources:
- Research the publicly announced power purchase agreements and data center-related deals Vistra has signed or is pursuing with… (useluminix.com)
- Generator Enters 20-Year PPA to Supply Power from Texas Nuclear Power Plant | American Public Power Association (publicpower.org)
- TXU Parent Announces Plans to Build New Gas-Fueled Dispatchable Power Units In Texas, Also Inks 1,200 MW PPA To Supply Nuclear Power -- EnergyChoiceMatters.com (energychoicematters.com)
- Comanche Peak Nuclear Power Plant (AWS PPA) — Vistra in Glen Rose, TX · Compute Atlas (compute-atlas.com)
- Vistra announces Comanche deal, plan to add 860 MW of natural gas | Utility Dive (utilitydive.com)
