3 March 2026

Kier Group plc

Commencement of £25m share buyback programme

Kier Group plc ("Kier", the "Company", or the "Group"), a leading infrastructure services, construction and property group, today announces alongside its interim results for the six months ended 31 December 2025 that it will commence a share buyback programme to purchase ordinary shares of 1 pence each in the capital of the Company ("Ordinary Shares") up to a maximum consideration of £25 million (the "Buyback Programme").

The purpose of the Buyback Programme is to return capital to shareholders. The Company will hold as treasury shares any Ordinary Shares repurchased in accordance with the provisions of the Companies Act 2006.

The Company has entered into a non-discretionary agreement with Deutsche Bank AG, London Branch ("Deutsche Numis") to conduct the Buyback Programme on its behalf and carry out on-market purchases of Ordinary Shares (the "Agreement"). The Buyback Programme will commence today, 3 March 2026, and will end on the date on which the total purchase price of all Ordinary Shares purchased by Deutsche Numis pursuant to the Buyback Programme is equal to, or as close as possible to (but not exceeding), £25 million. Deutsche Numis will make trading decisions in relation to the Buyback Programme independently of, and without further instruction from, the Company. Under the Agreement, the Company has issued an irrevocable non-discretionary instruction to Deutsche Numis to manage the Buyback Programme in order that purchases of Ordinary Shares can continue during closed periods, and if and when the Company comes into possession of inside information. While the Company has launched the Buyback Programme, there is no certainty on the volume of Ordinary Shares that may be purchased or any certainty on the pace and quantum of purchases.

Any purchases of Ordinary Shares pursuant to the Buyback Programme will be carried out on the London Stock Exchange and on other trading venues, in accordance with certain pre-set parameters set out in the Agreement and in accordance with (and subject to the limits prescribed by) the Company's general authority to repurchase Ordinary Shares granted by its shareholders at the annual general meeting held on 13 November 2025 (the "2025 AGM"), Chapter 9 of the Financial Conduct Authority's UK Listing Rules, Article 5(1) of the Market Abuse Regulation (EU) No 596/2014 (as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018, as amended), the Commission Delegated Regulation (EU) No 2016/1052 (as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018, as amended), and other applicable laws.

The Company will announce all transactions in Ordinary Shares pursuant to the Buyback Programme by no later than 7.30 a.m. on the 7th business day following the calendar day on which such transaction occurred.

At the time of this announcement, the Company's share capital comprises 452,875,390 Ordinary Shares, of these shares 10,978,468 are held in treasury, therefore, the total voting rights in the Company is 441,896,922.

The Company's Legal Entity Identifier ("LEI") is 2138002RKCU2OM4Y7O48.

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For further information, please contact:

Kier Group plc

Investor Relations +44 (0)7933 388 746

Kier Press Office +44 (0)1767 355 096

FTI Consulting

Richard Mountain, +44 (0)7909 684466

About Kier Group plc

Kier is a leading UK infrastructure services, construction and property group.

Our purpose is to sustainably deliver infrastructure which is vital to the UK, and we are committed to leaving lasting legacies through our work.

We provide specialist design and build capabilities and the knowledge, skills and intellectual capital of our people to ensure we are able to project manage and integrate all aspects of a project.

You can find out more about Kier on our website, or follow us on LinkedIn by searching for Kier Group.

This announcement does not constitute an offer of securities by Kier Group plc (the "Company"). Nothing in this announcement is intended to be, or intended to be construed as, a profit forecast or a guide as to the performance, financial or otherwise, of the Company or any of its subsidiaries (together, the "Group") whether in the current or any future financial year. This announcement may include statements that are, or may be deemed to be, ''forward-looking statements''. By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future and may be beyond the Company's or the Group's ability to control or predict. Forward-looking statements are not guarantees of future performance. You are advised to read the section headed ''Principal risks and uncertainties'' in the Company's Annual Report and Accounts for the year ended 30 June 2025 for a further discussion of the factors that could affect the Company's or the Group's future performance and the industry in which it operates. Other than in accordance with its legal or regulatory obligations, the Company does not accept any obligation to update or revise publicly any forward-looking statement, whether as a result of new information, future events or otherwise.