Transaction in Own Shares

22 October 2025

Auto Trader Group plc ("Auto Trader" or the "Company")

Auto Trader Group plc Transaction in Own Shares

Auto Trader Group plc (the "Company") announces that on 22 October 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 799.6467 pence per share:

Number of ordinary shares purchased:

4,426

Highest purchase price paid per share:

800.0000p

Lowest purchase price paid per share:

799.2000p

Following the above transaction, the Company has 868,935,046 ordinary shares in issue and holds 5,215,031 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 863,720,015 which may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Auto Trader Group plc 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), the schedule below contains detailed information about the purchases made by Merrill Lynch International on behalf of the Company as part of the buyback programme.

Enquiries:

Auto Trader Group plc

Claire Baty, Company Secretary

0345 111 0006

Schedule of Purchases - Individual Transactions

Number of shares purchased

Transaction price (per share)

Time of transaction

Execution venue

603

799.2

08:15:33

XLON

991

800.0

08:53:31

XLON

870

799.8

08:53:38

XLON

919

799.8

08:53:38

XLON

161

799.2

09:00:55

XLON

327

799.2

09:00:55

XLON

555

799.4

09:00:55

XLON