Transaction in Own Shares

15 December 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 15 December 2025 it purchased through Deutsche Bank AG, London Branch (trading for these purposes as Deutsche Numis) ("Deutsche Numis") the following number of its ordinary shares for Cancellation at an average price of 617.7545 pence per share:

Number of ordinary shares purchased:

160,739

Highest purchase price paid per share:

622.40p

Lowest purchase price paid per share:

610.60p

Following the above transaction, the Company has 854,101,829 ordinary shares in issue and holds 4,786,344 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 849,315,485 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 Deutsche Numis 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 ordinary shares purchased

Transaction price(GBp share)

Time of transaction (UK Time)

Trading venue

3128

614.20

 08:19:46

XLON

841

614.20

 08:19:46

XLON

1964

614.20

 08:19:46

XLON

2065

614.00

 08:19:46

XLON

2447

613.20

 08:20:12

XLON

1403

612.60

 08:20:35

XLON

478

612.60

 08:20:35

XLON

793

612.20

 08:20:40

XLON

62

612.20

 08:20:40

XLON

1208

612.20

 08:20:40

XLON

1857

611.40

 08:23:04

XLON

1049

610.60

 08:26:54

XLON

705

610.60

 08:26:54

XLON

440

610.80

 08:28:24

XLON

1367

610.80

 08:28:24

XLON

1229

613.20

 08:30:00

XLON

701

613.20

 08:30:00

XLON

1884

613.00

 08:30:02

XLON

1833

620.00

 09:01:25

XLON

1701

619.80

 09:06:10

XLON

1714

619.60

 09:10:12

XLON

743

620.00

 09:16:08

XLON

138

620.00

 09:16:08

XLON

1172

620.00

 09:16:08

XLON

1068

616.40

 09:17:58

XLON

74

616.40

 09:17:58

XLON

805

616.40

 09:17:58

XLON

1701

616.00

 09:25:45

XLON

1823

615.00

 09:30:59

XLON

1811

616.80

 09:43:34

XLON

1746

617.00

 09:43:34

XLON

340

617.40

 10:03:13

XLON

1359

617.40

 10:03:13

XLON

1877

617.40

 10:03:42

XLON

1996

617.40

 10:10:03

XLON

1715

618.60

 10:18:12

XLON

1824

618.80

 10:20:01

XLON

447

618.80

 10:25:09

XLON

1551

618.80

 10:25:09

XLON

2100

618.60

 10:25:09

XLON

1733

617.80

 10:37:30

XLON

2060

618.00

 10:48:58

XLON

663

618.80

 10:56:01

XLON

1352

618.80

 10:56:01

XLON

1780

618.80

 11:02:03

XLON

2066

618.40

 11:09:47

XLON

1768

617.40

 11:11:23

XLON

1870

617.80

 11:12:11

XLON

2804

617.60

 11:12:32

XLON

749

618.40

 11:12:47

XLON

983

618.40

 11:12:48

XLON

2003

618.40

 11:12:57

XLON

2519

618.20

 11:12:57

XLON

766

618.00

 11:13:32

XLON

1689

618.00

 11:13:32

XLON

2082

617.80

 11:15:45

XLON

1773

617.60

 11:15:50

XLON

83

617.40

 11:20:19

XLON

1610

617.40

 11:20:19

XLON

1953

615.80

 11:21:45

XLON

1702

615.60

 11:30:35

XLON

2017

614.80

 11:40:45

XLON

840

614.80

 11:52:28

XLON

936

614.80

 11:52:28

XLON

1977

616.00

 12:02:00

XLON

1825

616.60

 12:10:33

XLON

1148

617.20

 12:16:40

XLON

760

617.20

 12:16:40

XLON

1928

616.20

 12:19:23

XLON

1825

616.00

 12:23:38

XLON

182

615.80

 12:31:24

XLON

1605

615.80

 12:31:24

XLON

1847

616.60

 12:39:09

XLON

1988

617.40

 12:40:00

XLON

2032

618.00

 12:46:16

XLON

1954

618.20

 12:49:09

XLON

1730

617.80

 12:56:38

XLON

2007

617.40

 13:05:35

XLON

1925

616.60

 13:15:13

XLON

1928

616.40

 13:24:26

XLON

1777

616.80

 13:30:20

XLON

659

618.20

 13:34:23

XLON

1204

618.20

 13:34:23

XLON

1809

619.40

 13:43:27

XLON

1835

619.60

 13:47:13

XLON

1451

620.00

 14:20:54

XLON

351

620.00

 14:41:43

XLON

1758

621.40

 14:48:19

XLON

2108

621.60

 14:54:43

XLON

154

622.20

 15:01:17

XLON

195

622.20

 15:01:17

XLON

223

622.20

 15:01:17

XLON

138

622.20

 15:01:17

XLON

370

622.20

 15:01:17

XLON

631

622.20

 15:01:18

XLON

1927

622.20

 15:05:27

XLON

1901

621.40

 15:08:10

XLON

1692

621.20

 15:13:33

XLON

1995

621.80

 15:21:01

XLON

1693

622.40

 15:33:25

XLON

1807

622.00

 15:34:06

XLON

57

622.40

 15:47:10

XLON

1819

622.40

 15:47:10

XLON

1829

622.40

 15:53:41

XLON

2108

622.20

 16:03:52

XLON

1909

622.40

 16:13:09

XLON

1414

621.80

 16:13:50

XLON

372

621.80

 16:13:50

XLON

2007

620.60

 16:17:39

XLON

98

621.00

 16:21:09

XLON

1759

621.00

 16:21:09

XLON

1957

620.80

 16:22:30

XLON

1484

620.40

 16:22:55

XLON

627

620.40

 16:22:55

XLON