Amazon and Meta: Two Counterparties, Twenty YearsNarrow moat

Vistra (VST) — moat facet

The most consequential customer concentration in the collection to have been created deliberately.

In September 2025 Amazon Web Services contracted 1,200 megawatts of Comanche Peak output for twenty years with options to extend by up to twenty more, delivering from the fourth quarter of 2027 and reaching full capacity in 20321. In January 2026 Meta contracted 2,609 megawatts from the PJM nuclear fleet for twenty years — Perry's 1,268 megawatts, Davis-Besse's 908, and 433 megawatts of planned uprates — delivering from late 2026 for the operating volumes and from 2031 for the uprates2.

Contracted nuclear by counterparty (MW)2,176 MWMeta, operating1,200 MWAmazon433 MWMeta, uprates3,809 MW committed in total against a 6,448 MW existing fleet plus 433 MW of planned uprates
Two counterparties, twenty years, and the credit quality is about as good as concentration ever gets.

Set against a nuclear fleet of 6,448 megawatts3, those agreements cover a little over half the existing capacity, and they cover the half that produces the company's best margins.

This is the most consequential customer concentration in the collection to have been created on purpose. It is also, on credit, about as good as concentration gets: two counterparties with balance sheets that make Vistra's $5,097 million of stockholders' equity4 look small, contracting a product both have publicly committed to buying.

The risks are not credit risks. They are the ordinary risks of long relationships. A contract of twenty years will be administered by people who have not been hired yet, through market conditions nobody has forecast, with delivery obligations that bind Vistra whether or not its plants are running.

And the two are unusually correlated. Both are hyperscalers, both contracted for the same reason, and a change in the economics of AI compute reaches both simultaneously. Vistra's own risk language covers the scenario: if demand does not grow as expected or it cannot execute on large load offtake opportunities including agreements already entered into, results and share price could be adversely affected5.

Moat trajectory: Narrowing

Eighteen months ago there was no customer concentration at all; today two counterparties hold twenty-year claims on a little over half the nuclear fleet, and management is pursuing more.

The number that tests this moat
Moat Explorer calc
Nuclear fleet claimed by two buyers
~3,376 MW of 6,448

Created deliberately in eighteen months, into two of the strongest credits on earth. The risk is not solvency; it is that both are hyperscalers contracting for the same reason, so a change in AI compute economics reaches both at once.

Source: Vistra Corp. Form 10-K, fiscal year 2025 ↗
References
  1. ReportedIn September 2025 Amazon Web Services contracted 1,200 megawatts of Comanche Peak output for twenty years with options to extend by up to twenty more, delivering from the fourth quarter of 2027 and reaching full capacity in 2032
    Vistra secures long-term nuclear PPA from Comanche Peak (Power Engineering) — a 20-year power purchase agreement with Amazon Web Services, with options to extend for up to an additional 20 years, to supply 1,200 MW of carbon-free power from the Comanche Peak Nuclear Power Plant; power delivery is anticipated to begin in the fourth quarter of 2027 and to ramp to full capacity by 2032 — September 2025 · publ. September 2025 · source ↗
  2. ReportedIn January 2026 Meta contracted 2,609 megawatts from the PJM nuclear fleet for twenty years — Perry's 1,268 megawatts, Davis-Besse's 908, and 433 megawatts of planned uprates — delivering from late 2026 for the operating...
    Vistra and Meta announce agreements to support nuclear plants in PJM, 9 January 2026 — twenty-year power purchase agreements under which Vistra will supply Meta with a total of 2,609 MW of carbon-free power and capacity from its PJM nuclear plants: 1,268 MW of energy and capacity from Perry and 908 MW from Davis-Besse, plus 213 MW of uprate energy and capacity from Perry, 80 MW from Davis-Besse and 140 MW from Beaver Valley; delivery commences on a portion of the operating energy and capacity in late 2026 with full delivery by year end 2027, and uprate delivery commences in 2031 with full delivery by year end 2034; Vistra agreed to be the preferred power partner for Helix Digital Infrastructure, a newly formed company designed to develop infrastructure for AI-oriented hyperscalers. Meta contracted up to 6.6 GW of nuclear power across agreements with Vistra, Oklo and TerraPower announced the same day — January 2026 · publ. January 2026 · source ↗
  3. ReportedSet against a nuclear fleet of 6,448 megawatts, those agreements cover a little over half the existing capacity, and they cover the half that produces the company's best margins
    Vistra Corp. Form 10-K, FY2025, Item 2 Properties and generation fleet — six nuclear generating units at four facilities totalling 6,448 MW: Comanche Peak Unit 1 (ERCOT, 1,200 MW, 18-month refuelling, licence to 2050), Comanche Peak Unit 2 (ERCOT, 1,200 MW, 2053), Beaver Valley Unit 1 (PJM, 939 MW, 2036), Beaver Valley Unit 2 (PJM, 933 MW, 2047), Perry (PJM, 1,268 MW, 24-month refuelling, 2046) and Davis-Besse (PJM, 908 MW, 24-month refuelling, 2037), with nuclear units "generally operated at full capacity"; coal and lignite fleet of seven facilities totalling 8,743 MW; twelve peaking generation facilities totalling 4,822 MW; battery energy storage of 350 MW in California, 270 MW in Texas and 4 MW in Illinois; solar of 538 MW in Texas and 112 MW in Illinois; the Moss Landing 100 MW and 300 MW battery facilities "will not return to service" — FY2025 · publ. February 2026 · source ↗
  4. ReportedIt is also, on credit, about as good as concentration gets: two counterparties with balance sheets that make Vistra's $5,097 million of stockholders' equity look small, contracting a product both have publicly committed to buying
    Vistra Corp. Form 10-K, FY2025, consolidated financial statements — net income attributable to Vistra $944M (2024 $2,659M, 2023 $1,493M); cumulative preferred dividends $(192)M; net income attributable to common stock $752M (2024 $2,467M, 2023 $1,343M); diluted earnings per share $2.18 (2024 $7.00, 2023 $3.58); weighted average diluted shares 345,656,067 (2024 352,567,060, 2023 375,193,110); operating income $1,906M (2024 $4,081M); total stockholders equity $5,097M at 31 December 2025 (2024 $5,570M, 2023 $5,307M); 2025 financing activity included $1.744bn to redeem senior secured and unsecured notes and $1.028bn to repurchase common stock; Energy Harbor purchased for $3.1 billion in March 2024; the Lotus Acquisition for $1.1 billion in October 2025; $325 million of insurance proceeds received in 2025 for the Moss Landing and Martin Lake Incidents — FY2025 · publ. February 2026 · source ↗
  5. ReportedVistra's own risk language covers the scenario: if demand does not grow as expected or it cannot execute on large load offtake opportunities including agreements already entered into, results and share price could be adversely...
    Vistra Corp. Form 10-K, FY2025, risk factors and business outlook — "If electricity demand does not grow at the rate expected, or if we are unable to execute on large load offtake opportunities, including under long-term power purchase or offtake agreements that we have entered into, our financial performance, growth opportunities, and stock price could be adversely impacted"; "Multiple demand drivers such as emergence of large load data centers, including in response to transformations in technologies like artificial intelligence (AI) and electrification of oil field operations (specifically in the Permian Basin of west Texas), have accelerated, and are expected to continue to accelerate, load growth in the geographic regions we serve"; "large-scale cryptocurrency mining, AI data centers, and increased industrial electrification are becoming increasingly prevalent in certain markets, including ERCOT, and many of these facilities are behind-the-meter"; emerging technologies including "distributed renewable energy technologies, energy efficiency, electric vehicles, distributed generation, energy storage devices, fuel cells, nuclear small modular reactors, and linear generators could have a significant impact on the energy industry" and "could make portions of our electric system power supply and transmission and/or distribution facilities obsolete prior to the end of their useful lives"; "we hedge the expected needs of our wholesale and retail customers, but unexpected changes due to weather, natural disasters, consumer behavior, market constraints or other factors could cause us to purchase electricity to meet unexpected demand in periods of high wholesale market prices or resell excess electricity into the wholesale market in periods of low prices"; long-term offtake agreements "enhance the stability and predictability of our cash flows" and "underwrite higher base profitability in the future" — FY2025 · publ. February 2026 · source ↗
Sources
Generated September 23, 2026