# HALEU demand converts into contracts while new capacity stays years away

> Constraint Alpha research note. Confidence: high.

Published: 2026-09-27T07:53:00Z  
Research as of: 2026-09-27  
Scope: theme / Nuclear Fuel Cycle / HALEU

## Summary

Centrus signed a multi-year HALEU supply contract with Antares with deliveries before decade-end, while Urenco reiterated a 2031 target for commercial-scale HALEU production at Capenhurst.

## What changed

- Centrus and Antares announced a definitive multi-year HALEU supply contract on September 17, including Antares prepayments intended to support expanded U.S. enrichment capacity.
- Urenco said on September 15 that its Capenhurst advanced-fuels plan targets commercial-scale HALEU production by 2031.
- The announcements are demand and capacity-build evidence; they do not establish current commercial HALEU abundance.

## Why it matters

Contracted demand is becoming more concrete while major incremental enrichment capacity remains a multi-year build, reinforcing the need to track qualification, funding and delivery milestones separately.

## Evidence

- [Centrus: Antares multi-year HALEU supply contract](https://investors.centrusenergy.com/news-releases/news-release-details/centrus-and-antares-sign-multi-year-haleu-supply-contract) — Definitive multi-year contract, prepayments for capacity expansion and deliveries before decade-end. (as of 2026-09-17)
- [Urenco: advanced fuels and Capenhurst HALEU plan](https://www.urenco.com/news/global/2026/fuel-supply-readiness-vital-for-next-generation-of-reactors-conference-hears) — Commercial-scale HALEU production target at Capenhurst by 2031. (as of 2026-09-15)

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Canonical URL: https://constraintalpha.com/research/centrus-antares-urenco-haleu-september-2026