Transaction in Own Shares

9 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 9 September 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 812.7696 pence per share:

Number of ordinary shares purchased:

266,242

Highest purchase price paid per share:

814.8000p

Lowest purchase price paid per share:

801.4000p

Following the above transaction, the Company has 876,346,882 ordinary shares in issue and holds 5,233,960 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 871,112,922 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

274

805.6

08:05:48

XLON

591

802.8

08:19:44

XLON

52

802

08:23:01

XLON

281

802

08:23:01

XLON

376

801.4

08:26:16

XLON

769

803.2

08:45:35

XLON

735

803

08:52:22

XLON

514

802.6

08:52:47

XLON

313

802.2

08:53:24

XLON

848

806.2

09:23:14

XLON

279

806.8

09:39:11

XLON

391

806.6

09:40:17

XLON

690

806.6

09:40:17

XLON

41

806.2

09:42:32

XLON

859

806.2

09:43:43

XLON

366

807.4

10:07:56

XLON

712

807.2

10:07:56

XLON

983

806.8

10:07:59

XLON

467

806.8

10:26:08

XLON

851

806.6

10:26:09

XLON

475

806.4

10:27:14

XLON

366

808.6

11:14:14

XLON

15

811

11:56:19

XLON

1,120

811

11:56:19

XLON

509

810.6

12:02:55

XLON

605

810.6

12:02:55

XLON

1,163

810.8

12:02:55

XLON

472

810.6

12:15:28

XLON

656

810.4

12:15:28

XLON

5

810

12:39:11

XLON

852

810

12:39:11

XLON

408

809.8

12:43:41

XLON

484

809.6

12:43:41

XLON

932

809.4

12:43:43

XLON

467

810.2

13:00:59

XLON

678

811.4

13:33:46

XLON

792

811.6

13:33:46

XLON

401

811.2

13:34:07

XLON

645

811

13:34:07

XLON

529

810.6

13:38:25

XLON

549

810.8

13:38:25

XLON

65

810.4

13:43:49

XLON

260

810.4

13:43:49

XLON

619

811.8

14:04:15

XLON

274

811.6

14:04:19

XLON

332

811.6

14:04:19

XLON

319

811.2

14:04:31

XLON

551

811

14:06:01

XLON

349

810.6

14:09:23

XLON

429

810.4

14:09:23

XLON

48

809.6

14:14:48

XLON

277

809.8

14:14:48

XLON

375

809.6

14:14:48

XLON

565

809

14:16:03

XLON

312

809.8

14:29:55

XLON

53

809.6

14:30:44

XLON

394

809.6

14:30:44

XLON

325

809.4

14:30:50

XLON

384

809

14:31:25

XLON

541

808.8

14:34:21

XLON

375

808.2

14:34:24

XLON

12

807.8

14:34:25

XLON

546

807.8

14:34:25

XLON

165

808.2

14:43:09

XLON

970

808.2

14:43:09

XLON

653

811

15:00:59

XLON

730

810.8

15:00:59

XLON

431

810.6

15:03:18

XLON

499

810.6

15:03:18

XLON

493

812.2

15:20:01

XLON

502

812.2

15:20:01

XLON

462

812.8

15:25:54

XLON

993

813.2

15:31:15

XLON

70

812.6

15:35:45

XLON

211

812.6

15:35:45

XLON

384

812.6

15:35:45

XLON

642

812.4

15:35:46

XLON

61

812

15:35:53

XLON

323

812

15:35:53

XLON

671

811.8

15:35:54

XLON

398

811.4

15:41:43

XLON

656

811.2

15:41:51

XLON

550

811

15:43:28

XLON

301

810.6

15:48:01

XLON

363

810.8

15:48:01

XLON

377

810.4

15:48:05

XLON

393

810.2

15:49:03

XLON

530

809.8

15:50:09

XLON

988

813.6

16:10:15

XLON

924

813.6

16:10:41

XLON

476

814

16:12:32

XLON

521

814

16:12:32

XLON

621

814

16:13:00

XLON

306

813.6

16:13:01

XLON

792

813.4

16:15:11

XLON

520

812.8

16:15:31

XLON

695

813.4

16:19:32

XLON

333

813.6

16:22:25

XLON

419

813.6

16:22:25

XLON

628

813.4

16:23:49

XLON

345

813

16:24:30

XLON

830

812.6

16:25:00

XLON

126

814.6

16:29:41

XLON

183

814.6

16:29:41

XLON

390

814.6

16:29:41

XLON

415

814.6

16:29:41

XLON

534

814.6

16:29:41

XLON

4

814.8

16:29:55

XLON

118

814.8

16:29:55

XLON

135

814.8

16:29:55

XLON

166

814.8

16:29:55

XLON

540

814.8

16:29:55

XLON

1,469

814.8

16:29:58

XLON

83

813.4

16:35:01

XLON

504

813.4

16:35:01

XLON

882

813.4

16:35:01

XLON

1,019

813.4

16:35:01

XLON

1,181

813.4

16:35:01

XLON

1,188

813.4

16:35:01

XLON

1,577

813.4

16:35:01

XLON

1,581

813.4

16:35:01

XLON

1,620

813.4

16:35:01

XLON

1,808

813.4

16:35:01

XLON

2,311

813.4

16:35:01

XLON

2,347

813.4

16:35:01

XLON

2,359

813.4

16:35:01

XLON

2,621

813.4

16:35:01

XLON

2,954

813.4

16:35:01

XLON

3,050

813.4

16:35:01

XLON

3,825

813.4

16:35:01

XLON

4,246

813.4

16:35:01

XLON

5,182

813.4

16:35:01

XLON

5,748

813.4

16:35:01

XLON

6,204

813.4

16:35:01

XLON

6,294

813.4

16:35:01

XLON

6,329

813.4

16:35:01

XLON

9,215

813.4

16:35:01

XLON

10,117

813.4

16:35:01

XLON

11,821

813.4

16:35:01

XLON

12,519

813.4

16:35:01

XLON

12,883

813.4

16:35:01

XLON

14,176

813.4

16:35:01

XLON

15,926

813.4

16:35:01

XLON

16,444

813.4

16:35:01

XLON

44,002

813.4

16:35:01

XLON