Selling the Output Before It Is MadeNarrow moat

Vistra (VST) — moat facet

Half the nuclear fleet contracted for twenty years to Amazon and Meta — a merchant generator converting itself, reactor by reactor.

The most consequential thing happening at Vistra is not a plant or an acquisition. It is a change in what kind of company it is.

Nuclear capacity, contracted vs merchant (MW)2,176 MWMeta, PJM operating1,200 MWAmazon, Comanche Peak3,072 MWStill merchantPlus 433 MW of future uprates, also contracted to Meta - just over half the existing fleet committed
A merchant generator converting itself into a contracted one, one reactor at a time, to two of the strongest credits on earth.

A merchant generator sells into a spot market at a price nobody promises. Its earnings are a forecast of weather, fuel and demand, its cost of capital reflects that, and its return on capital swings the way Vistra's has — 1.0%, 2.3%, 7.0%, 4.9%, negative, negative, 9.5%, 13.8%, 5.6%1.

A contracted generator sells its output years in advance at a fixed price to a named counterparty. Its earnings are a schedule. It is a different business with a different multiple, and Vistra is converting itself into one, reactor by reactor.

Two agreements have done most of the work. Amazon Web Services contracted for 1,200 megawatts of carbon-free power from Comanche Peak in Texas under a twenty-year agreement with options to extend by up to a further twenty, with delivery beginning in the fourth quarter of 2027 and ramping to full capacity by 20322. Meta then contracted for 2,609 megawatts from the PJM nuclear fleet under twenty-year agreements — Perry's full 1,268 megawatts, Davis-Besse's 908, and 433 megawatts of future uprate capacity across Perry, Davis-Besse and Beaver Valley3.

Add the operating portions and roughly 3,376 megawatts of Vistra's 6,448 megawatts of existing nuclear4 is now committed under twenty-year contracts — a little over half the fleet, sold to two of the most creditworthy companies on earth.

What that does to the business is more interesting than the revenue. It removes price risk on the highest-margin output for two decades, which should lower the cost of capital and make the earnings legible. It also removes the upside on the same megawatts, which is the trade being made.

The rating is narrow and the trajectory is widening because this is genuinely structural rather than cyclical — but nothing has been delivered yet. Meta's deliveries commence on a portion in late 2026 and reach full volume by the end of 20275; Amazon's begin in late 20276. Everything on this page is a contract, not a cash flow.

Moat trajectory: Widening

Two agreements in eighteen months have moved a little over half the nuclear fleet onto twenty-year fixed prices, and management continues to pursue more. Each one lowers the cost of capital and makes the earnings legible.

The number that tests this moat
Moat Explorer calc
Existing nuclear under 20-year contract
~3,376 MW of 6,448, just over half

1,200 MW of Comanche Peak to Amazon and 2,176 MW of operating PJM capacity to Meta, plus 433 MW of future uprates. The share rises as more is contracted, and the thesis is tested when deliveries begin in late 2027.

Source: Vistra Corp. Form 10-K, fiscal year 2025 ↗
Aspects of the moat
DIG DEEPER 01
Twenty Years, One Reactor, One Buyer
Amazon contracted 1,200 megawatts of Comanche Peak, which is exactly one reactor, for up to forty years.
DIG DEEPER 02
Meta Took the PJM Fleet
Two entire reactors and every uprate megawatt Vistra plans to create, contracted before the equipment exists.
DIG DEEPER 03
What a Contract Does to a Merchant
The same reactor, valued as a schedule rather than as a forecast — which is the whole re-rating.
DIG DEEPER 04
The Counterparties Are Better Credits Than Vistra
Two buyers worth several hundred times Vistra's equity, who need the attribute rather than the electrons.
⚠ Threats to the moat
⚠ THREAT 01
Contracting Away the Upside
If the scarcity thesis is right, Amazon and Meta made the better trade on those megawatts.
⚠ THREAT 02
Nothing Has Been Delivered Yet
Every megawatt in the story is a contract; the first meaningful deliveries are in late 2027.
References
  1. Moat Explorer calcIts earnings are a forecast of weather, fuel and demand, its cost of capital reflects that, and its return on capital swings the way Vistra's has — 1.0%, 2.3%, 7.0%, 4.9%, negative, negative, 9.5%, 13.8%, 5.6%
    Moat Explorer calculation from SEC EDGAR XBRL — return on invested capital as NOPAT divided by average operating invested capital, where NOPAT is OperatingIncomeLoss multiplied by one minus the effective tax rate and invested capital is total assets less current liabilities less cash: 1.0% (2017), 2.3% (2018), 7.0% (2019), 4.9% (2020), -5.4% (2021), -4.2% (2022), 9.5% (2023), 13.8% (2024), 5.6% (2025). The 8% hurdle is an assumed weighted average cost of capital, not a filed figure — FY2017-FY2025 · publ. August 2026 · source ↗
  2. ReportedAmazon Web Services contracted for 1,200 megawatts of carbon-free power from Comanche Peak in Texas under a twenty-year agreement with options to extend by up to a further twenty, with delivery beginning in the fourth quarter...
    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 ↗
  3. ReportedMeta then contracted for 2,609 megawatts from the PJM nuclear fleet under twenty-year agreements — Perry's full 1,268 megawatts, Davis-Besse's 908, and 433 megawatts of future uprate capacity across Perry, Davis-Besse and...
    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 ↗
  4. Moat Explorer calcAdd the operating portions and roughly 3,376 megawatts of Vistra's 6,448 megawatts of existing nuclear is now committed under twenty-year contracts — a little over half the fleet, sold to two of the most creditworthy companies...
    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 ↗
  5. ReportedMeta's deliveries commence on a portion in late 2026 and reach full volume by the end of 2027; Amazon's begin in late 2027
    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 ↗
  6. ReportedMeta's deliveries commence on a portion in late 2026 and reach full volume by the end of 2027; Amazon's begin in late 2027
    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 ↗
Sources
Generated September 23, 2026