Keller Group Plc – Holding(s) in Company

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB0004866223

Issuer Name

KELLER GROUP PLC

UK or Non-UK Issuer

UK

2. Reason for Notification

An event changing the breakdown of voting rights

3. Details of person subject to the notification obligation

Name

Dimensional Fund Advisors LP

City of registered office (if applicable)

Austin

Country of registered office (if applicable)

USA

4. Details of the shareholder

Name City of Country of
registered registered
office office
Funds and accounts managed by Dimensional Fund
Advisors LP and/or its subsidiary undertakings

5. Date on which the threshold was crossed or reached

07-May-2026

6. Date on which Issuer notified

11-May-2026

7. Total positions of person(s) subject to the notification obligation

. % of voting % of voting rights Total of Total
rights through financial both number of
attached to instruments (total in % voting
shares of 8.B 1 + 8.B 2) (8.A + rights held
(total 8.B) in issuer
of 8.A)
Resulting 4.996175 0.000000 4.996175 3,495,662
situation on the
date on
which threshold
was crossed or
reached
Position of 5.003855 0.000000 5.003855
previous
notification
(if applicable)

8. Notified details of the resulting situation on the date on which the
threshold was crossed or reached

8A. Voting rights attached to shares

Class/Type Number of Number of indirect % of direct % of indirect
of shares direct voting rights voting rights voting rights
ISIN code(if voting (DTR5.2.1) (DTR5.1) (DTR5.2.1)
possible) rights
(DTR5.1)
GB0004866223 3,495,662 4.996175
Sub Total 3,495,662 4.996175
8.A

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

Type of Expiration Exercise/ Number of voting rights that may be % of
financial date conve acquired if the instrument is voting
instrument rsion exercised/converted rights
period

Sub Total
8.B1

8B2. Financial Instruments with similar economic effect according to
(DTR5.3.1R.(1) (b))

Type of Expiration Exercise/conve Physical or Number of % of
financial date rsion period cash voting voting
instrument settlement rights rights

Sub Total 8.B2

9. Information in relation to the person subject to the notification obligation

2. Full chain of controlled undertakings through which the voting rights and/or
the financial instruments are effectively held starting with the ultimate
controlling natural person or legal entities (please add additional rows as
necessary)

Ultimate Name of % of voting rights % of voting Total of both if
controlling controlled if it equals or is rights it equals or is
person undertaking higher than the through higher than the
notifiable financial notifiable
threshold instruments threshold
if it
equals or
is higher
than the
notifiable
threshold
Dimensional i)
Holdings Dimensional
Inc. Fund
Advisors
Ltd., (ii)
DFA
Australia
Limited
(iii)
Dimensional
Ireland
Limited
(iv)
Dimensional
Fund
Advisors
Canada ULC
(v)
Dimensional
Fund
Advisors
Pte. Ltd.
and (vi)
Dimensional
Fund
Advisors LP

10. In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional Information

The ordinary shares are held in segregated accounts and funds (together, the
“Accounts”) managed on a discretionary basis by Dimensional Fund Advisors LP
(“Dimensional”) and its subsidiary undertakings i) Dimensional Fund Advisors
Ltd., (ii) DFA Australia Limited (iii) Dimensional Ireland Limited (iv)
Dimensional Fund Advisors Canada ULC (v) Dimensional Fund Advisors Pte. Ltd. and
(vi) Dimensional Fund Advisors LP.
As at 7 May 2026, Dimensional also had investment management discretion over an
additional 10,061 shares where the voting rights are not controlled by
Dimensional or its subsidiary undertakings.
Dimensional is controlled by its general partner, Dimensional Holdings Inc.
Dimensional, on behalf of itself and its subsidiary undertakings, expressly
disclaims beneficial ownership of the shares held in the Accounts.

12. Date of Completion

11-May-2026

13. Place Of Completion

Paris

Enquiries:

Jamie Dearsley

Assistant Company Secretary

+44 7824 584 151

Keller Group plc

LEI Number:         549300QO4MBL43UHSN10

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