Transaction in Own Shares

14 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 14 October 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 768.5882 pence per share:

Number of ordinary shares purchased:

290,383

Highest purchase price paid per share:

770.6000p

Lowest purchase price paid per share:

762.4000p

Following the above transaction, the Company has 870,396,831 ordinary shares in issue and holds 5,216,191 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 865,180,640 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

174

764.0

08:22:55

XLON

74

763.4

08:27:25

XLON

224

763.4

08:27:25

XLON

504

763.2

08:37:55

XLON

318

762.4

08:37:56

XLON

286

764.0

08:46:59

XLON

415

764.0

08:46:59

XLON

542

764.2

08:46:59

XLON

153

763.6

08:48:50

XLON

185

763.6

08:48:50

XLON

227

763.4

08:53:52

XLON

237

763.4

08:53:52

XLON

628

763.8

09:02:11

XLON

804

766.2

09:43:40

XLON

330

765.8

09:43:50

XLON

227

765.4

09:45:32

XLON

275

765.4

09:45:32

XLON

1,223

765.6

09:45:32

XLON

383

768.6

10:08:43

XLON

459

768.6

10:08:43

XLON

141

768.4

10:08:44

XLON

1,083

768.4

10:08:44

XLON

1,412

768.4

10:08:44

XLON

359

767.8

10:09:18

XLON

171

767.8

10:09:23

XLON

1,118

767.6

10:12:23

XLON

3,692

767.4

10:12:24

XLON

303

767.0

10:17:58

XLON

702

766.6

10:22:10

XLON

1,342

766.4

10:22:10

XLON

2,962

766.8

10:22:10

XLON

318

767.4

10:39:50

XLON

1,137

767.4

10:39:50

XLON

865

767.2

10:40:38

XLON

1,557

767.0

10:40:39

XLON

295

767.0

10:43:45

XLON

70

766.8

10:44:31

XLON

226

766.8

10:44:59

XLON

1,203

766.8

10:44:59

XLON

1,355

766.4

10:49:31

XLON

1,530

766.4

10:49:31

XLON

1,579

766.2

10:49:31

XLON

2,095

766.2

10:49:31

XLON

523

765.4

10:53:56

XLON

1,649

765.4

10:53:56

XLON

2,150

765.6

10:53:56

XLON

2,144

765.2

10:58:53

XLON

941

766.0

11:18:41

XLON

1,237

765.8

11:32:35

XLON

207

765.6

11:34:22

XLON

1,135

766.8

11:45:19

XLON

1,249

766.4

11:48:00

XLON

1,331

766.6

11:48:00

XLON

1,277

765.8

11:49:20

XLON

507

765.6

11:49:24

XLON

603

765.0

11:51:28

XLON

322

764.4

11:53:32

XLON

342

767.8

12:37:20

XLON

631

768.2

13:01:11

XLON

712

768.0

13:03:22

XLON

636

767.6

13:03:32

XLON

488

767.4

13:04:04

XLON

616

767.6

13:30:00

XLON

650

767.4

13:39:42

XLON

1,383

766.8

13:43:52

XLON

572

767.0

13:54:32

XLON

738

767.2

13:54:32

XLON

47

767.6

14:04:36

XLON

140

767.6

14:04:36

XLON

140

767.6

14:04:36

XLON

112

767.6

14:04:37

XLON

141

767.6

14:04:37

XLON

141

767.6

14:04:37

XLON

416

767.4

14:04:37

XLON

195

767.4

14:05:59

XLON

169

767.4

14:06:14

XLON

589

767.2

14:20:18

XLON

195

767.8

14:31:02

XLON

139

767.6

14:31:12

XLON

471

767.8

14:31:12

XLON

814

767.6

14:34:37

XLON

1,047

767.4

14:34:42

XLON

158

768.4

14:41:52

XLON

332

768.4

14:41:52

XLON

2,085

768.2

14:41:55

XLON

1,093

767.8

14:42:41

XLON

24

767.8

14:45:21

XLON

184

767.4

14:51:30

XLON

522

767.6

14:51:30

XLON

1,497

770.2

14:56:20

XLON

581

769.8

14:56:54

XLON

468

770.0

14:59:35

XLON

480

769.8

14:59:59

XLON

1,315

770.4

15:00:26

XLON

400

769.8

15:01:44

XLON

29

769.6

15:01:45

XLON

265

769.6

15:01:45

XLON

516

769.6

15:01:45

XLON

301

769.6

15:06:26

XLON

492

769.2

15:06:40

XLON

8

769.0

15:08:06

XLON

343

769.0

15:08:06

XLON

1,344

770.6

15:16:31

XLON

1,719

770.2

15:33:01

XLON

742

770.0

15:36:56

XLON

1,003

770.0

15:36:56

XLON

209

769.4

15:38:36

XLON

820

769.4

15:38:50

XLON

15

769.0

15:49:57

XLON

88

769.0

15:49:57

XLON

90

769.0

15:49:57

XLON

283

769.0

15:49:57

XLON

327

769.0

15:49:57

XLON

626

769.0

15:49:57

XLON

1,262

769.2

15:49:57

XLON

14

769.0

15:50:01

XLON

39

768.8

15:50:04

XLON

325

768.8

15:50:04

XLON

511

768.6

15:50:16

XLON

625

768.4

15:56:06

XLON

529

768.2

15:56:13

XLON

398

768.4

16:01:27

XLON

595

768.0

16:02:37

XLON

1,102

768.2

16:02:37

XLON

365

767.8

16:02:44

XLON

1,088

767.8

16:12:08

XLON

543

767.6

16:12:09

XLON

105

767.4

16:13:09

XLON

1,099

767.4

16:13:25

XLON

1,180

767.4

16:13:25

XLON

339

767.6

16:20:34

XLON

898

767.8

16:22:22

XLON

256

767.6

16:23:04

XLON

401

767.6

16:23:04

XLON

62

767.6

16:24:17

XLON

765

767.6

16:25:00

XLON

246

767.6

16:25:18

XLON

988

767.6

16:25:18

XLON

566

767.4

16:26:56

XLON

416

767.8

16:29:08

XLON

459

767.8

16:29:08

XLON

433

767.8

16:29:20

XLON

863

767.6

16:29:51

XLON

14

769.2

16:35:08

XLON

38

769.2

16:35:08

XLON

63

769.2

16:35:08

XLON

153

769.2

16:35:08

XLON

331

769.2

16:35:08

XLON

342

769.2

16:35:08

XLON

345

769.2

16:35:08

XLON

362

769.2

16:35:08

XLON

362

769.2

16:35:08

XLON

439

769.2

16:35:08

XLON

705

769.2

16:35:08

XLON

768

769.2

16:35:08

XLON

1,516

769.2

16:35:08

XLON

1,655

769.2

16:35:08

XLON

1,672

769.2

16:35:08

XLON

1,757

769.2

16:35:08

XLON

1,809

769.2

16:35:08

XLON

1,999

769.2

16:35:08

XLON

2,238

769.2

16:35:08

XLON

2,473

769.2

16:35:08

XLON

3,275

769.2

16:35:08

XLON

3,413

769.2

16:35:08

XLON

3,447

769.2

16:35:08

XLON

4,399

769.2

16:35:08

XLON

6,126

769.2

16:35:08

XLON

10,308

769.2

16:35:08

XLON

10,474

769.2

16:35:08

XLON

13,205

769.2

16:35:08

XLON

13,814

769.2

16:35:08

XLON

14,681

769.2

16:35:08

XLON

21,696

769.2

16:35:08

XLON

71,691

769.2

16:35:08

XLON