Transaction in Own Shares

8 September 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 8 September 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 804.9169 pence per share:

Number of ordinary shares purchased:

287,600

Highest purchase price paid per share:

808.2000p

Lowest purchase price paid per share:

802.4000p

Following the above transaction, the Company has 876,613,124 ordinary shares in issue and holds 5,233,960 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 871,379,164 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

262

803.6

08:09:34

XLON

18

803.6

08:09:35

XLON

32

806.4

08:56:57

XLON

262

806.4

08:56:57

XLON

393

807.8

09:01:17

XLON

410

807.2

09:02:00

XLON

668

807.4

09:02:00

XLON

295

806.8

09:03:25

XLON

821

807

09:03:25

XLON

385

807.8

09:06:46

XLON

19

807.2

09:12:53

XLON

118

807.2

09:12:53

XLON

271

807.2

09:12:53

XLON

611

807.4

09:12:53

XLON

228

807

09:13:21

XLON

245

807

09:13:21

XLON

726

806.8

09:13:21

XLON

259

806.4

09:14:35

XLON

189

806.4

09:14:38

XLON

255

806

09:15:28

XLON

319

806

09:15:28

XLON

437

805.2

09:16:16

XLON

302

807

09:30:43

XLON

404

806.8

09:31:27

XLON

1,925

806.6

09:31:27

XLON

1,104

806.8

09:40:32

XLON

489

807.8

09:55:24

XLON

956

807.4

10:08:24

XLON

87

806.8

10:14:13

XLON

264

806.8

10:14:13

XLON

1,080

807.2

10:19:26

XLON

118

806.8

10:27:55

XLON

537

806.8

10:27:55

XLON

1,480

806.8

10:27:55

XLON

343

806.6

10:29:27

XLON

1,513

806.6

10:29:36

XLON

525

806.4

10:29:58

XLON

723

806.4

10:29:58

XLON

1,941

806.2

10:32:06

XLON

904

805.8

10:35:39

XLON

463

805.6

10:36:33

XLON

910

805.6

10:36:33

XLON

516

805

10:40:56

XLON

755

804.6

10:46:09

XLON

419

805.2

11:21:09

XLON

279

804.8

11:22:55

XLON

601

805

11:22:55

XLON

852

804.6

11:23:00

XLON

16

804.4

11:24:14

XLON

184

804.4

11:24:14

XLON

1,394

804.4

11:24:14

XLON

694

803.8

11:29:26

XLON

295

806

12:11:19

XLON

303

806

12:11:19

XLON

1,202

805.8

12:16:29

XLON

1,036

805.6

12:17:54

XLON

170

805

12:33:54

XLON

1,620

805

12:34:13

XLON

157

804.8

12:37:31

XLON

609

804.8

12:37:31

XLON

647

805.4

12:47:06

XLON

530

805.2

12:47:14

XLON

300

805

12:49:22

XLON

535

804.8

13:03:32

XLON

379

806.6

13:25:11

XLON

962

806.4

13:28:54

XLON

287

808.2

13:54:00

XLON

288

808

13:56:00

XLON

288

808

13:56:00

XLON

457

808

13:56:02

XLON

1,221

807.6

13:57:33

XLON

362

807.4

14:00:19

XLON

427

807.4

14:00:19

XLON

192

807.2

14:05:44

XLON

483

807.2

14:05:44

XLON

533

807

14:05:45

XLON

497

806.6

14:12:50

XLON

50

806.4

14:12:51

XLON

209

806.4

14:12:51

XLON

503

806.4

14:12:51

XLON

9

806

14:22:39

XLON

41

806

14:22:39

XLON

152

806

14:22:39

XLON

356

806

14:22:39

XLON

419

805.8

14:23:01

XLON

306

805.6

14:23:17

XLON

303

806

14:28:40

XLON

600

806

14:28:40

XLON

320

805.4

14:30:05

XLON

686

805.4

14:30:05

XLON

605

805

14:30:33

XLON

1,838

805.2

14:30:33

XLON

159

807

14:56:37

XLON

398

807

14:56:37

XLON

773

807

14:57:45

XLON

425

806.8

14:58:16

XLON

532

806.6

14:59:25

XLON

265

806.4

14:59:50

XLON

692

806.4

14:59:59

XLON

1,002

806.4

14:59:59

XLON

750

806.2

15:00:00

XLON

750

806.2

15:09:22

XLON

909

806

15:09:57

XLON

651

805.8

15:12:42

XLON

699

805.6

15:13:07

XLON

407

805.4

15:13:43

XLON

608

805.2

15:14:43

XLON

59

805.2

15:17:57

XLON

271

805.2

15:17:57

XLON

831

805

15:18:20

XLON

75

804.8

15:18:21

XLON

292

804.6

15:18:21

XLON

316

804.6

15:18:21

XLON

518

804.8

15:18:21

XLON

790

804.4

15:21:17

XLON

654

804.2

15:23:24

XLON

1,977

804

15:23:24

XLON

1,498

803.8

15:23:30

XLON

832

803.2

15:24:35

XLON

517

803

15:25:47

XLON

412

802.8

15:27:47

XLON

295

802.6

15:27:53

XLON

293

802.4

15:28:04

XLON

498

804.4

15:51:47

XLON

1,180

804

15:52:14

XLON

2,111

803.6

15:54:40

XLON

651

803.4

15:58:01

XLON

36

804.4

16:10:37

XLON

440

804.4

16:10:37

XLON

267

804.2

16:12:24

XLON

1,173

804.2

16:12:24

XLON

1,610

804

16:12:46

XLON

1,130

803.8

16:12:51

XLON

502

803.6

16:14:21

XLON

825

805.8

16:19:57

XLON

313

805.6

16:19:58

XLON

3,468

805.6

16:19:58

XLON

961

806.2

16:23:55

XLON

460

806.2

16:26:30

XLON

1,050

806.2

16:26:30

XLON

81

806.4

16:26:42

XLON

97

806.4

16:26:42

XLON

419

806.4

16:26:42

XLON

453

806.4

16:26:42

XLON

1,401

806.6

16:28:56

XLON

8

804.6

16:35:23

XLON

19

804.6

16:35:23

XLON

102

804.6

16:35:23

XLON

190

804.6

16:35:23

XLON

220

804.6

16:35:23

XLON

365

804.6

16:35:23

XLON

840

804.6

16:35:23

XLON

875

804.6

16:35:23

XLON

948

804.6

16:35:23

XLON

1,848

804.6

16:35:23

XLON

2,403

804.6

16:35:23

XLON

3,658

804.6

16:35:23

XLON

4,146

804.6

16:35:23

XLON

4,525

804.6

16:35:23

XLON

6,360

804.6

16:35:23

XLON

6,487

804.6

16:35:23

XLON

6,718

804.6

16:35:23

XLON

10,054

804.6

16:35:23

XLON

11,687

804.6

16:35:23

XLON

11,768

804.6

16:35:23

XLON

12,306

804.6

16:35:23

XLON

13,662

804.6

16:35:23

XLON

16,214

804.6

16:35:23

XLON

33,374

804.6

16:35:23

XLON

51,869

804.6

16:35:23

XLON