LSEG intends to hold the purchased shares in treasury. Following the above transaction, LSEG holds 21,911,899 of its ordinary shares of 679/86 pence each in treasury and has 521,688,067 ordinary shares of 679/86 pence each in issue (excluding treasury shares). Therefore, the total voting rights in the Company will be 521,688,067. This figure for the total number of voting rights may be used by shareholders (and others with notification obligations) as the denominator for the calculation by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules. In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (the Market Abuse Regulation) (as such legislation forms part of retained EU law as defined in the European Union (Withdrawal) Act 2018, as implemented, retained, amended, extended, re-enacted or otherwise given effect in the United Kingdom from 1 January 2021 and as amended or supplemented in the United Kingdom thereafter), a full breakdown of the individual purchases by GSI on behalf of the Company as part of the buyback programme can be found at: http://www.rns-pdf.londonstockexchange.com/rns/8130B_1-2025-10-2.pdf This announcement does not constitute, or form part of, an offer or any solicitation of an offer for securities in any jurisdiction. Enquiries to: London Stock Exchange Group plc: Lucie Holloway, Rhiannon Davies (Media): +44 (0)20 7797 1222 Peregrine Riviere (Investors): [email protected] | 