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 acquisition or disposal of voting rights

3. Details of person subject to the notification obligation

Name

JPMorgan Asset Management Holdings Inc.

City of registered office (if applicable)

Wilmington

Country of registered office (if applicable)

United States of America

4. Details of the shareholder

5. Date on which the threshold was crossed or reached

23-Jun-2026

6. Date on which Issuer notified

24-Jun-2026

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

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

8A. Voting rights attached to shares

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

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

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)

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

If date does not apply, explain below

11. Additional Information

Chain of controlled undertakings:

JPMorgan Asset Management Holdings Inc
JPMorgan Asset Management International Limited (100%)
JPMorgan Asset Management (UK) Limited (100%)

JPMorgan Asset Management Holdings Inc
J.P. Morgan Investment Management Inc. (100%)

JPMorgan Asset Management Holdings Inc
J.P. Morgan Alternative Asset Management, Inc. (100%)

JPMorgan Asset Management Holdings Inc.
JPMorgan Asset Management (China) Company Limited (100%)

JPMorgan Asset Management Holdings Inc.
JPMorgan Asset Management (Asia) Inc. (100%)
JPMorgan Asset Management (Taiwan) Limited (100%)

JPMorgan Asset Management Holdings Inc
JP Morgan chase Bank, N.A. (100%)

JPMorgan Asset Management Holdings Inc.
JPMorgan Asset Management (Asia) Inc. (100%)
JPMorgan Asset Management (Asia Pacific) Limited (100%)

JPMorgan Asset Management Holdings Inc.
JPMorgan Asset Management (Asia) Inc. (100%)
JPMorgan Asset Management (Japan) Limited (100%)

12. Date of Completion

24-Jun-2026

13. Place Of Completion

Hyderabad, India

Enquiries:

Jamie Dearsley

Assistant Company Secretary

+44 7824 584 151

Keller Group plc

LEI Number:         549300QO4MBL43UHSN10