Transaction in Own Shares

20 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 20 October 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 780.7037 pence per share:

Number of ordinary shares purchased:

290,000

Highest purchase price paid per share:

783.8000p

Lowest purchase price paid per share:

774.6000p

Following the above transaction, the Company has 869,229,472 ordinary shares in issue and holds 5,216,191 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 864,013,281 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

384

776.0

08:05:45

XLON

797

779.6

08:27:29

XLON

1,102

779.4

08:28:02

XLON

118

778.8

08:31:42

XLON

240

778.4

08:31:42

XLON

546

778.6

08:31:42

XLON

971

778.8

08:31:42

XLON

366

778.4

08:31:43

XLON

425

779.0

08:43:12

XLON

359

778.8

08:44:22

XLON

294

778.4

08:45:08

XLON

544

778.2

08:45:08

XLON

459

778.8

08:52:24

XLON

659

778.6

08:52:24

XLON

594

778.0

08:53:56

XLON

382

777.8

08:54:00

XLON

463

777.8

08:54:00

XLON

440

779.0

09:13:23

XLON

1,421

779.0

09:13:23

XLON

1,363

778.8

09:13:28

XLON

252

778.2

09:16:17

XLON

295

778.6

09:16:17

XLON

332

778.6

09:16:17

XLON

589

778.6

09:16:17

XLON

703

778.2

09:19:01

XLON

779

778.0

09:19:02

XLON

18

777.6

09:35:23

XLON

449

777.4

09:35:23

XLON

680

777.6

09:35:23

XLON

599

777.8

09:45:30

XLON

851

777.6

09:45:30

XLON

250

778.2

09:55:54

XLON

483

778.2

09:55:54

XLON

923

778.0

09:58:50

XLON

300

777.0

09:58:51

XLON

383

777.0

09:58:51

XLON

555

777.6

09:58:51

XLON

1,040

777.4

09:58:51

XLON

821

776.8

09:58:52

XLON

336

776.4

09:59:38

XLON

412

776.2

09:59:38

XLON

345

776.2

10:25:57

XLON

658

776.6

10:41:25

XLON

393

776.4

10:41:27

XLON

808

776.2

10:45:24

XLON

746

776.0

10:53:13

XLON

566

776.2

10:59:34

XLON

792

776.4

10:59:34

XLON

124

775.6

11:05:20

XLON

763

775.6

11:05:20

XLON

228

774.6

11:14:47

XLON

228

774.6

11:14:47

XLON

346

774.8

11:14:47

XLON

349

775.0

11:14:47

XLON

1,935

777.6

11:25:45

XLON

1,348

777.6

11:45:23

XLON

112

777.6

11:55:04

XLON

1,280

777.6

11:55:04

XLON

1,967

777.0

11:55:30

XLON

324

776.8

11:57:28

XLON

1,481

776.8

11:59:46

XLON

41

776.8

12:42:25

XLON

255

776.8

12:42:25

XLON

868

777.6

12:57:42

XLON

410

777.4

12:59:46

XLON

709

777.4

12:59:46

XLON

989

777.6

13:05:04

XLON

313

777.0

13:12:49

XLON

768

776.8

13:15:07

XLON

1,398

777.2

13:33:49

XLON

347

777.0

13:35:27

XLON

1,291

777.0

13:35:27

XLON

982

777.0

13:44:08

XLON

289

777.0

13:47:13

XLON

413

777.0

13:47:13

XLON

649

777.0

13:48:22

XLON

407

777.0

13:48:25

XLON

393

777.0

13:48:34

XLON

223

778.0

13:49:49

XLON

994

778.0

13:50:03

XLON

1,077

777.8

13:50:49

XLON

1,648

777.8

13:50:49

XLON

642

777.4

13:55:37

XLON

348

778.2

14:03:25

XLON

115

778.0

14:03:41

XLON

702

778.0

14:03:41

XLON

1,269

778.0

14:03:41

XLON

398

777.8

14:06:29

XLON

891

777.8

14:06:29

XLON

189

777.2

14:12:05

XLON

2,542

777.2

14:12:05

XLON

374

777.6

14:22:58

XLON

1,111

777.6

14:22:58

XLON

400

778.4

14:34:51

XLON

1,839

778.2

14:34:55

XLON

2,412

778.2

14:34:55

XLON

659

777.8

14:35:28

XLON

385

777.8

14:35:29

XLON

2,044

778.6

14:47:38

XLON

899

778.4

14:52:20

XLON

435

778.6

14:58:10

XLON

899

778.6

14:58:10

XLON

363

779.8

15:04:14

XLON

49

779.6

15:08:00

XLON

4,152

779.6

15:08:00

XLON

402

779.2

15:16:33

XLON

1,308

779.2

15:16:33

XLON

272

779.0

15:16:50

XLON

515

779.0

15:16:50

XLON

1,814

779.0

15:16:50

XLON

156

778.4

15:19:32

XLON

438

778.4

15:20:00

XLON

898

779.8

15:27:25

XLON

2,363

779.6

15:29:11

XLON

518

778.8

15:29:12

XLON

1,254

780.2

15:43:10

XLON

189

779.8

15:45:03

XLON

144

779.8

15:45:41

XLON

307

780.2

15:47:25

XLON

500

780.2

15:47:25

XLON

219

780.0

15:47:50

XLON

337

780.0

15:47:50

XLON

425

780.0

15:47:50

XLON

272

780.0

15:47:54

XLON

425

780.0

15:47:54

XLON

1,060

779.4

15:48:57

XLON

2,996

779.6

15:48:57

XLON

4,132

779.2

15:51:12

XLON

602

780.4

15:52:53

XLON

947

780.2

15:53:05

XLON

776

780.0

15:53:12

XLON

938

780.2

15:53:35

XLON

2,043

781.0

15:54:36

XLON

9

781.2

16:04:21

XLON

120

781.2

16:04:21

XLON

398

781.2

16:04:21

XLON

983

781.2

16:04:21

XLON

150

780.6

16:04:34

XLON

157

780.8

16:04:34

XLON

225

780.6

16:04:34

XLON

320

780.8

16:04:34

XLON

624

780.6

16:04:34

XLON

1,534

780.8

16:04:34

XLON

106

780.6

16:04:39

XLON

160

780.6

16:04:39

XLON

375

780.6

16:04:39

XLON

426

780.6

16:04:39

XLON

614

780.6

16:04:39

XLON

62

780.4

16:06:42

XLON

110

780.4

16:06:42

XLON

151

780.4

16:06:42

XLON

195

780.2

16:06:42

XLON

695

780.4

16:06:42

XLON

1,186

780.2

16:06:42

XLON

75

780.0

16:06:43

XLON

81

780.0

16:06:43

XLON

1,226

780.0

16:06:43

XLON

1,300

780.0

16:06:43

XLON

2,115

780.6

16:06:51

XLON

245

781.2

16:07:00

XLON

250

781.2

16:07:00

XLON

440

781.2

16:07:00

XLON

912

781.2

16:07:00

XLON

361

781.0

16:07:11

XLON

375

781.2

16:07:40

XLON

88

781.0

16:08:43

XLON

780

781.0

16:09:58

XLON

114

781.0

16:10:04

XLON

452

780.8

16:10:04

XLON

603

780.8

16:10:04

XLON

2,208

780.8

16:10:04

XLON

426

781.2

16:11:20

XLON

346

781.2

16:11:23

XLON

844

782.4

16:16:18

XLON

111

782.4

16:16:32

XLON

1,118

782.2

16:16:50

XLON

2,021

782.4

16:19:29

XLON

66

782.6

16:23:44

XLON

73

782.6

16:23:44

XLON

198

782.6

16:23:44

XLON

210

782.6

16:23:44

XLON

1,083

782.8

16:23:44

XLON

1,208

783.2

16:24:29

XLON

2,444

783.2

16:24:29

XLON

2,744

783.2

16:24:29

XLON

750

782.8

16:25:21

XLON

1,122

782.8

16:25:28

XLON

77

782.8

16:25:40

XLON

181

783.6

16:28:07

XLON

400

783.6

16:28:07

XLON

455

783.4

16:28:07

XLON

455

783.6

16:28:07

XLON

211

783.8

16:29:37

XLON

400

783.8

16:29:37

XLON

455

783.8

16:29:37

XLON

71

783.8

16:29:54

XLON

75

783.8

16:29:54

XLON

211

783.8

16:29:54

XLON

582

783.8

16:29:54

XLON

58

783.8

16:29:57

XLON

7,570

783.8

16:29:59

XLON

18

782.0

16:35:00

XLON

27

782.0

16:35:00

XLON

51

782.0

16:35:00

XLON

275

782.0

16:35:00

XLON

308

782.0

16:35:00

XLON

321

782.0

16:35:00

XLON

384

782.0

16:35:00

XLON

477

782.0

16:35:00

XLON

786

782.0

16:35:00

XLON

1,139

782.0

16:35:00

XLON

2,079

782.0

16:35:00

XLON

2,873

782.0

16:35:00

XLON

3,034

782.0

16:35:00

XLON

3,591

782.0

16:35:00

XLON

19,891

782.0

16:35:00

XLON

26,962

782.0

16:35:00

XLON

35,823

782.0

16:35:00

XLON

44,170

782.0

16:35:00

XLON