Business
Director/PDMR Grant of LTIP Award
Director/PDMR Grant of LTIP Award.

About this update from Diploma Plc
10-11 CHARTERHOUSE SQUARE, LONDON EC1M 6EE TELEPHONE: +44 (0)20 7549 5700 FACSIMILE: +44 (0)20 7549 5715 19 JANUARY 2023 LONG TERM INCENTIVE AWARDS TO EXECUTIVE DIRECTORS The Remuneration Committee of Diploma PLC has approved the grant of long-term incentive Awards of Ordinary Shares of 5p each in Diploma PLC to Johnny Thomson, Chief Executive Officer on 18 January 2023 under the Diploma PLC 2020 Performance Share Plan (as amended) ("PSP"): PSP Award Shares Share Price JD Thomson 79,424 Ordinary Shares £28.48 The Awards are subject to the achievement of performance conditions measured over a three-year performance period ending 30 September 2025 and the number of Ordinary Shares shown above represent the maximum number of shares which may vest in connection with these Awards. A summary of the PSP, including the performance conditions relating to these Awards, is set out in the Annual Report & Accounts 2022, which is available on the Company's website at www.diplomaplc.com The Notification of Dealing Form can be found below. This announcement is made in accordance with the UK Market Abuse Regulation. 1 Details of the Director/PDMR/PCA a) Name 1. JD Thomson 2 Reason for the notification a) Position/Status 1. Chief Executive Officer b) Initial notification/Amendment Initial notification 3 Details of the issuer a) Name Diploma PLC b) LEI 2138008OGI7VYG8FGR19 4 Details of the transactions: a) Description of the financial instrument, type of instrument Identification code Ordinary shares of 5p each in the Company GB0001826634 b) Nature of the transaction 1. Grant of PSP Shares c) Price(s) and volume(s) Price Volume 1. Grant at £28.48 79,424 d) Aggregated information - Aggregated volume - Price Price Volume 1. Grant at £28.48 79,424 e) Date of the transaction 18 January 2023 f) Place of the transaction London Stock Exchange, United Kingdom For further information, please contact: J Morrison, Group Company Secretary +44 (0)20 7549 5700 Further information on Diploma PLC can be found at www.diplomaplc.com LEI: 2138008OGI7VYG8FGR19