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 This information was brought to you by Cision http://news.cision.com