RNS Number : 3851C National Grid PLC 30 August 2024 30 August 2024 National Grid plc ('National Grid' or 'Company') Notification of Transaction of Person Discharging Managerial Responsibilities ('PDMR') This announcement is made in accordance with Article 19 of the Market Abuse Regulation ('MAR') and relates to the following PDMR acquiring shares following the partial vesting of an award under the Company's Retention Award Plan ('RAP'). This vesting relates to the RAP Award made to Will Serle, PDMR on 1 June 2022. The award was conditional on continued employment with the Company and on the satisfaction of the performance conditions approved by the Remuneration Committee, which (after tax on the gross award) must be retained until the shareholding requirement is met. The award is subject to malus and clawback provisions. The Company also announces a correction to an announcement made on 14 June 2024. On 29 August 2024, the Company was notified that, due to an administration error, it was incorrectly announced that Will Serle, Chief People & Culture Officer, sold 97 rights under the Share Incentive Plan pursuant to the 2024 Rights Issue. The amended announcement is included below in full which shows his full take-up of these rights. The date of notification of these transactions was 29 August 2024. In accordance with MAR the relevant Financial Conduct Authority modification is set out below. This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com. RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy. END DSHSDUFISELSEFA