Transaction in Own Shares.

TRANSACTIONS IN OWN SHARES

Monday 28 September 2026

Balfour Beatty plc (the "Group" or "Balfour Beatty"), the international infrastructure group, announces that, in accordance with the terms of its share buyback programme announced on 5 January 2026, and increased on 11 March 2026 (the "Share Buyback"), the Group purchased 357,673 of its ordinary shares of 50 pence each through Merrill Lynch International between 21 September 2026 and 25 September 2026.

The Group will hold the repurchased shares in treasury. Following the purchase of these shares, the remaining number of ordinary shares in issue will be 474,656,089 (excluding treasury shares).

The Group has, under the Share Buyback, repurchased 18,192,495 ordinary shares at a volume weighted average price of 818.4607 pence, which are to be held in treasury with no voting rights attached. The shares repurchased under the Share Buyback are the only shares held in Treasury by the Group. Accordingly, the total number of voting rights in the Company is 474,656,089. This figure may be used by shareholders as the denominator for the calculation by which they will determine whether they are required to notify their interest in, or a change to their interest in, Balfour Beatty plc under the FCA's Disclosure and Transparency Rules.

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (the Market Abuse Regulation), the table available on the Company's website here contains detailed and aggregated information of the individual trades made by Merrill Lynch International as part of the Share Buyback.

Aggregated information of ordinary shares purchased according to each trading venue:

Analyst/investor enquiries:
Jim Ryan
Tel. +44 (0)785 836 8527
[email protected]

Media enquiries:
Vivienne Dunn
Tel. +44 (0)203 810 2345
[email protected]

Notes to editors:

• Balfour Beatty is a leading international infrastructure group delivering the complex, critical infrastructure that keeps economies moving and communities connected.
• With around 26,000 employees, we finance, develop, build, maintain and operate essential infrastructure across the UK, US and Asia, combining deep engineering and construction expertise with long-term investment capability.
• For over one hundred years, we have delivered landmark projects around the world. Today, our teams are helping to deliver major programmes including Hinkley Point C, the UK’s first new nuclear power station in a generation; the Lyric Theatre in Hong Kong, a world-class cultural venue at the heart of the West Kowloon Cultural District; and the Knox Street Development in Dallas, Texas, a major mixed-use scheme helping to reshape one of the city’s most vibrant neighbourhoods.

Legal Entity Identifier: CT4UIJ3TUKGYYHMENQ17