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 plc
Jamie Dearsley, Assistant Company Secretary
Tel: +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

                                       PDMR(Provide job     PCA(Provide name
a)                                     title)               of job title of
   Position / status                                        relevant PDMR)

                                       President, APAC      N/A

b) Initial notification/Amendment      Initial notification

3  Details of the issuer

a) Name                                Keller Group plc

                                       549300QO4MBL43UHSN10
b) LEI and classification
                                       2.2 Inside information

   Details of the transaction(s): section to be repeated for (i) each type of
4  instrument; (ii) each type of transaction; (iii) each date; and (iv) each
   place where transactions have been conducted

a) Description of the financial        Ordinary shares of 10p each
   instrumentIdentification code       GB0004866223

b) Indicate nature of the transaction  Acquisition Disposal Subscription Other

   ii) Is the transaction linked to an Yes                  No
   exercise of a share award?
                                                            X

                                                            If yes, provide
                                                            date at which
   iii) Was the transaction conducted  Yes         No       investment
   pursuant to an investment programme                      programme or
   or a trading plan?                                       trading plan was
                                                            entered into:

                                                   X

c)                                     Price(s)(Please      Volume(s)
   Price(s) and volume(s)              state currency)

                                       GBP 22.03            30,000

                                       Aggregated price(s)  Aggregated volume
d)                                     (Please state        (s)
   Aggregated information              currency)

                                       Not applicable -     Not applicable -
                                       single transaction   single transaction

                                       Date: 05.03.2026
e) Date of the transaction
                                       Time zone: GMT

f) Place of the transaction            London Stock Exchange