Diploma PLC has announced that Johnny Thomson, the Chief Executive Officer, has exercised his options over 74,804 Ordinary Shares of 5p each in the company. These shares were granted to him on 23 November 2020 under the Diploma PLC 2020 Performance Share Plan. After covering the tax and national insurance liability on the award, Thomson's shareholding has increased by 39,646 shares. The net shares are required to be held until the fifth anniversary of the grant of the award. The award vested after meeting performance conditions measured over a three-year period that ended on 30 September 2023. The details of the performance conditions can be found in the Annual Report & Accounts 2023, which will be mailed to shareholders in due course.

The transactions were made on 20 November 2023 outside a trading venue. The exercise of the awards was done at nil cost, while the sale of shares to cover tax and national insurance was done at a price of £30.20 per share. The aggregated information for both transactions is as follows: 74,804 shares were exercised at nil cost, and 35,158 shares were sold at a price of £30.20 per share.

For further information, J Morrison, Group General Counsel & Company Secretary, can be contacted at +44 (0)20 7549 5700. More information about Diploma PLC can be found on their website at www.diplomaplc.com.