Director/PDMR Shareholding

9 March 2026 Keller Group plc Director/PDMR Shareholding Keller Group plc (the "Company") announces that on 8 March 2026 it was notified of the following transaction in the Company's ordinary shares of 10 pence each ("Shares") undertaken by a Person Discharging Managerial Responsibilities :

Deepak Raj, President APAC (Asia-Pacific) , disposed of 30,000 Shares at GBP 22.03 per Share.

The transaction took place on 5 March 2026 in London (XLON).

The Notification of Dealing Form for the PDMR can be found below. Enquiries: Keller Group plcJamie Dearsley, Assistant Company SecretaryTel: +44 2045 572 019 Notes to editors: Keller is the world's largest geotechnical specialist contractor providing a wide portfolio of advanced foundation and ground improvement techniques used across the entire construction sector. With around 10,000 staff and operations across five continents, Keller tackles an unrivalled 5,500 projects every year, generating annual revenue of c.£3bn. NOTIFICATION AND PUBLIC DISCLOSURE OF TRANSACTIONS BY PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES AND PERSONS CLOSELY ASSOCIATED WITH THEM 1 Details of persons discharging managerial responsibility ("PDMR") / person closely associated ("PCA") a) Name Deepak Raj 2 Reason for the notification a) Position / status PDMR (Provide job title) PCA (Provide name of job title of relevant PDMR) President, APAC N/A b) Initial notification/Amendment Initial notification 3 Details of the issuer a) Name Keller Group plc b) LEI and classification

549300QO4MBL43UHSN10

2.2 Inside information 4 Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted a) Description of the financial instrument Identification code Ordinary shares of 10p each GB0004866223 b) Indicate nature of the transaction Acquisition Disposal Subscription Other ii) Is the transaction linked to an exercise of a share award? Yes No X iii) Was the transaction conducted pursuant to an investment programme or a trading plan? Yes No If yes, provide date at which investment programme or trading plan was entered into: X c) Price(s) and volume(s) Price(s) (Please state currency) Volume(s) GBP 22.03 30,000 d) Aggregated information Aggregated price(s) (Please state currency) Aggregated volume(s) Not applicable - single transaction Not applicable - single transaction e) Date of the transaction

Date: 05.03.2026

Time zone: GMT f) Place of the transaction London Stock Exchange