<div id="readability-page-1"><div>RNS Number : 5377K London Stock Exchange Group PLC 08 December 2025 08 December 2025London Stock Exchange Group plc (&#34;LSEG&#34;)Transaction in Own SharesLSEG announces it has purchased the following number of its ordinary shares of 679/86 pence each from Citigroup Global Markets Limited (&#34;Citi&#34;) on the London Stock Exchange as part of its share buyback programme, as announced on 04 November 2025.<div><table><tbody><tr><td>Date of purchase:</td><td>05 December 2025</td></tr><tr><td>Aggregate number of ordinary shares purchased:</td><td>194,084</td></tr><tr><td>Lowest price paid per share:</td><td>8,628.00p</td></tr><tr><td>Highest price paid per share:</td><td>8,728.00p</td></tr><tr><td>Average price paid per share:</td><td>8,675.32p</td></tr></tbody></table></div>LSEG intends to cancel all of the purchased shares.Following the cancellation of the repurchased shares, LSEG has 512,726,937 ordinary shares of 679/86 pence each in issue (excluding treasury shares) and holds 24,051,599 of its ordinary shares of 679/86 pence each in treasury. Therefore, the total voting rights in the Company will be 512,726,937. 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 Citi on behalf of the Company as part of the buyback programme can be found at:http://www.rns-pdf.londonstockexchange.com/rns/5377K_1-2025-12-5.pdfThis announcement does not constitute, or form part of, an offer or any solicitation of an offer for securities in any jurisdiction.ContactsInvestorsPeregrine Riviere / Chris Turner - Investor Relationsir@lseg.comMediaLucie Holloway / Rhiannon Davies - External Communications+44 (0) 20 7797 1222newsroom@lseg.comwww.lseg.comSchedule of PurchasesShares purchased: 194,084 (ISIN: GB00B0SWJX34)Date of purchases: 05 December 2025Investment firm: CitiAggregate information:<div><table><tbody><tr><td>Venue</td><td>Volume-weighted average price</td><td>Aggregated volume</td><td>Lowest price per share</td><td>Highest price per share</td></tr><tr><td>London Stock Exchange</td><td>8,675.32</td><td>194,084</td><td>8,628.00</td><td>8,728.00</td></tr><tr><td>Turquoise</td><td></td><td></td><td></td><td></td></tr></tbody></table></div>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 POSFSSFAIEISELE</div></div>

LSEG

London Stock Exchange Group PLC (LSEG) announced the purchase of 194,084 ordinary shares as part of its share buyback program. The shares were bought from Citigroup Global Markets Limited at prices ranging from 8,628.00p to 8,728.00p, with an average price of 8,675.32p. LSEG intends to cancel the purchased shares, resulting in 512,726,937 ordinary shares in issue. This announcement is part of LSEG's ongoing buyback program.

REG - LondonStockExGroup - Transaction in Own Shares