Costain is returning to the FTSE 250 index for the first time in more than 20 years.

The re-entry comes after years of consistent financial performance and ahead of a results announcement for the year ended 31 December 2025 on 10 March 2026.

Alex Vaughan, Chief Executive Officer of Costain, commented: “I am extremely proud of the whole Costain team and the role they have played in achieving Costain’s return to the FTSE 250.

“This significant milestone follows what has been a sustained period of strong financial performance for the business, with increased profitability, positive cash generation and continued momentum in securing high-quality work across our chosen growth markets.

“Our performance is testament to the success of our strategy and the commitment and attitude of our people. We look forward to continuing our commitment to create further value for all our stakeholders.”