State

Agreement signed

Capacity under contract is not energy supplied.

Open question

Who has committed to buy the output, on what stated terms, and has any energy been supplied?

  • Not established in reviewed sources: Price, term and penalty terms of the Microsoft agreement
  • Not established in reviewed sources: Whether the 2028 delivery date has been formally amended
  1. TargetTarget: supply under contract started, 2028Stated 15 October 2025 · Company reported · Helion Energy

    Source: Helion Energy ↗

  2. Current stateAgreement signed10 May 2023 · Company reported · Helion Energy

    Before: Not established in reviewed sources. Source: Helion Energy ↗

Evidence detail

Agreement signed

Agreement to supply Microsoft electricity from Helion's first fusion plant; Constellation as power marketer and transmission manager

Capacity under contract is not energy supplied.

“Helion Energy (Helion) today announced an agreement to provide Microsoft electricity from its first fusion power plant. Constellation will serve as the power marketer and will manage transmission for the project.”
Attribution
Company reported
Publisher
Helion Energy
Dated
10 May 2023
First public disclosure
10 May 2023
State before
Not established in reviewed sources
Counterparty
Microsoft (Constellation as power marketer)
Detail
Bindingness not stated
Source read
11 November 2026

Inspect primary source: Helion Energy ↗

What this does and does not establish

An exact passage match shows the source says this. It does not prove the underlying claim is true.

Watch customer / offtakeInspect project history