Finance

UK's Costain gets up to $1.3 billion nuclear utilities contract

Published by Global Banking & Finance Review

Posted on October 13, 2025

1 min read

· Last updated: January 21, 2026

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(Reuters) -Construction engineering firm Costain said on Monday that it has been selected as a contractor by a nuclear decommissioning firm, and that the British company's share of the order is valued

Costain Secures Up to $1.3 Billion Contract for Nuclear Utilities

(Reuters) -Construction engineering firm Costain said on Monday that it has been selected as a contractor by a nuclear decommissioning firm, and that the British company's share of the order is valued at up to 1 billion pounds ($1.33 billion).

Costain's shares jumped 8% in early trading.

The partnership with Sellafield Ltd involves a nine-year contract that may be extended for another six years, and is for Costain to refurbish and replace utility distribution systems to support Sellafield's nuclear decommissioning program.

Morgan Sindall Infrastructure and HOCHTIEF (UK) Construction are the other two companies involved in the Sellafield contract, which overall is worth up to 2.9 billion pounds.

($1 = 0.7495 pounds)

(Reporting by Nithyashree R B and Pushkala Aripaka in Bengaluru; Editing by Eileen Soreng)

Key Takeaways

  • Costain wins a major contract worth up to $1.3 billion.
  • The contract is part of Sellafield's nuclear decommissioning program.
  • Costain's shares increased by 8% following the announcement.
  • The contract involves refurbishing utility distribution systems.
  • Morgan Sindall and HOCHTIEF UK are also part of the contract.

Frequently Asked Questions

What is a contractor in construction?
A contractor in construction is a person or company hired to perform specific tasks or manage projects, ensuring that work is completed according to agreed specifications and timelines.
What is a refurbishment in construction?
Refurbishment in construction refers to the process of renovating or improving an existing building or structure, often involving updates to systems, aesthetics, or functionality.
What is the significance of a contract extension?
A contract extension allows the terms of an existing agreement to continue for an additional period, often providing more time to complete a project or fulfill obligations.

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