Total Voting Rights

Summary by AI ^BETAClose X

Costain Group PLC has announced its total voting rights and capital as of April 30, 2026. The company's issued share capital consists of 268,250,892 ordinary shares, each with a nominal value of 1 pence and carrying one vote. Costain Group PLC holds no ordinary shares in treasury. This figure of 268,250,892 shares will serve as the denominator for shareholders calculating their notification requirements under the FCA's Disclosure Guidance and Transparency Rules.

Disclaimer*

Costain Group PLC

01 May 2026

Costain Group PLC

(the 'Company')

1 May 2026

Total Voting Rights and Capital

In conformity with the Financial Conduct Authority's ("FCA") Disclosure Guidance and Transparency Rule 5.6.1(R) the Company notifies the market that:

As at 30 April 2026, the Company's issued share capital comprised 268,250,892 ordinary shares of 1 pence each, with each share carrying the right to one vote. The Company does not hold any ordinary shares in treasury.

The figure of 268,250,892 shares may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in Costain, or a change to their interest in Costain, under the FCA's Disclosure Guidance and Transparency Rules.

Enquiries

Investors and analysts Matt Jones, Costain	Matt.Jones@costain.com +44 (0)7860 922341
Financial media - Headland	costain@headlandconsultancy.com
Andy Rivett-Carnac	+44 (0)7968 997365
Charlie Twigg	+44 (0)7946 494568

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