Transaction in Own Shares

10 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 10 September 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 792.7302 pence per share:

Number of ordinary shares purchased:

297,000

Highest purchase price paid per share:

818.0000p

Lowest purchase price paid per share:

786.6000p

Following the above transaction, the Company has 876,049,882 ordinary shares in issue and holds 5,233,960 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 870,815,922 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

364

815.2

08:25:13

XLON

295

814.2

08:33:03

XLON

356

818

08:59:35

XLON

400

817.8

08:59:35

XLON

607

817.4

09:00:00

XLON

370

817

09:00:54

XLON

717

816.8

09:01:15

XLON

551

816.2

09:02:11

XLON

948

817

09:12:28

XLON

290

817.4

09:15:26

XLON

361

817.4

09:15:26

XLON

274

816.6

09:19:16

XLON

718

816.2

09:19:17

XLON

293

815.4

09:20:48

XLON

409

815.6

09:20:48

XLON

355

814.8

09:22:38

XLON

349

814.2

09:24:06

XLON

541

814

09:32:18

XLON

40

815

09:38:33

XLON

560

815

09:38:33

XLON

496

814.8

09:39:15

XLON

873

814.4

09:45:05

XLON

304

814.6

09:52:48

XLON

307

814.8

09:52:48

XLON

284

814.2

09:53:12

XLON

303

814

09:56:07

XLON

394

813.6

09:58:12

XLON

396

813.2

10:07:01

XLON

437

813.2

10:07:01

XLON

724

812.8

10:17:35

XLON

459

812.4

10:18:15

XLON

308

812

10:18:51

XLON

217

812

10:18:52

XLON

443

811.6

10:19:22

XLON

426

811.2

10:23:39

XLON

478

810.8

10:26:21

XLON

964

811.6

10:52:31

XLON

206

811.4

10:52:41

XLON

741

811.4

10:52:41

XLON

676

811.2

10:53:16

XLON

97

810.8

10:54:42

XLON

271

810.8

10:54:42

XLON

194

810.6

10:54:47

XLON

209

810.6

10:54:48

XLON

541

810.4

11:04:40

XLON

362

810.2

11:08:51

XLON

399

809.8

11:23:14

XLON

804

809.6

11:23:14

XLON

499

811.4

11:45:26

XLON

158

811.8

11:58:59

XLON

158

811.8

11:58:59

XLON

699

811.6

11:59:08

XLON

696

811.4

11:59:14

XLON

441

811.2

11:59:41

XLON

733

810.8

12:01:22

XLON

126

810.6

12:01:40

XLON

304

810.6

12:01:40

XLON

430

810.2

12:02:32

XLON

529

810

12:02:41

XLON

461

809.4

12:04:35

XLON

294

809

12:07:42

XLON

361

808.2

12:16:59

XLON

634

808

12:57:03

XLON

651

808.4

13:02:31

XLON

47

808.2

13:03:49

XLON

701

808.2

13:03:49

XLON

630

807.8

13:12:10

XLON

326

807.4

13:12:51

XLON

369

807.6

13:12:51

XLON

404

806.8

13:14:51

XLON

448

806.8

13:18:21

XLON

505

806

13:24:05

XLON

449

806.8

13:31:50

XLON

64

806.4

13:32:15

XLON

235

806.4

13:32:15

XLON

324

806.2

13:32:15

XLON

370

806.6

13:32:15

XLON

495

806

13:33:24

XLON

257

805

13:36:16

XLON

438

803.6

13:43:42

XLON

374

803.8

13:48:14

XLON

507

803.6

13:48:29

XLON

547

803

13:49:42

XLON

577

802.8

13:52:25

XLON

117

802.4

13:52:30

XLON

359

802.4

13:52:30

XLON

989

802

14:10:03

XLON

196

801.8

14:10:10

XLON

802

801.8

14:10:10

XLON

278

801.4

14:16:17

XLON

467

801.2

14:21:59

XLON

43

800.8

14:22:09

XLON

273

800.8

14:22:09

XLON

392

800.8

14:22:09

XLON

994

800.6

14:25:21

XLON

364

802.2

14:31:30

XLON

583

802

14:31:30

XLON

680

801.6

14:31:54

XLON

371

801.4

14:32:10

XLON

352

801

14:32:18

XLON

369

800.8

14:32:20

XLON

370

800.4

14:33:34

XLON

303

799.8

14:37:19

XLON

340

799.2

14:40:07

XLON

549

797.8

14:43:45

XLON

311

799.2

14:55:01

XLON

637

799.4

14:57:04

XLON

746

799.2

14:57:04

XLON

442

799.6

14:59:08

XLON

790

799.4

14:59:40

XLON

2,970

799.2

14:59:40

XLON

675

799

14:59:58

XLON

366

799

15:00:02

XLON

95

798.6

15:00:05

XLON

875

798.8

15:00:05

XLON

941

798.8

15:00:05

XLON

1,114

798.6

15:00:05

XLON

630

798.6

15:01:55

XLON

123

798.4

15:02:49

XLON

192

798.4

15:02:49

XLON

488

798.2

15:03:28

XLON

451

799.6

15:06:59

XLON

374

800.2

15:12:00

XLON

447

800

15:14:32

XLON

497

799.8

15:14:34

XLON

846

799.4

15:18:00

XLON

500

799.2

15:18:28

XLON

375

798.8

15:18:41

XLON

281

798.6

15:20:19

XLON

478

798.2

15:21:26

XLON

291

798

15:22:08

XLON

168

797.6

15:22:11

XLON

177

797.8

15:22:11

XLON

1,522

797.6

15:22:11

XLON

1,679

797.8

15:22:11

XLON

638

797.4

15:25:21

XLON

500

797.2

15:26:33

XLON

420

797

15:27:06

XLON

608

796.6

15:31:11

XLON

285

796.2

15:32:01

XLON

69

796

15:32:12

XLON

329

796

15:32:12

XLON

561

796

15:36:15

XLON

107

795.8

15:36:16

XLON

353

795.8

15:36:16

XLON

526

795.4

15:37:05

XLON

343

795.6

15:41:40

XLON

358

795.8

15:43:31

XLON

534

795.6

15:43:31

XLON

347

795.2

15:43:34

XLON

527

795.4

15:43:34

XLON

368

795

15:44:05

XLON

280

794.6

15:45:18

XLON

517

794.4

15:45:26

XLON

730

795.4

15:53:44

XLON

191

795.4

15:57:34

XLON

712

795.4

15:57:34

XLON

734

795.6

16:00:00

XLON

1,229

795.6

16:01:05

XLON

548

795.2

16:01:10

XLON

788

795

16:01:40

XLON

1,158

794.8

16:02:43

XLON

1,983

795

16:03:08

XLON

1,142

794.6

16:03:31

XLON

232

794.4

16:03:40

XLON

1,779

794.4

16:03:40

XLON

297

794.4

16:07:33

XLON

992

794.2

16:07:40

XLON

1,160

794

16:07:47

XLON

1,068

793.8

16:08:24

XLON

230

793

16:09:17

XLON

312

793

16:09:17

XLON

384

793.2

16:09:17

XLON

298

792.8

16:10:06

XLON

282

792.6

16:10:12

XLON

143

792.4

16:10:16

XLON

221

792.4

16:10:16

XLON

561

792.2

16:10:53

XLON

570

792.4

16:15:51

XLON

306

792.2

16:15:52

XLON

1,014

792.2

16:15:52

XLON

572

791.8

16:16:30

XLON

400

791.4

16:16:35

XLON

450

791.2

16:16:46

XLON

462

790.8

16:16:50

XLON

550

790

16:16:50

XLON

100

788.8

16:17:03

XLON

1,229

788.8

16:17:03

XLON

1,339

789

16:17:03

XLON

974

788.6

16:17:12

XLON

149

788.2

16:17:46

XLON

693

788

16:17:46

XLON

769

788.2

16:17:46

XLON

419

787.4

16:18:12

XLON

430

787.6

16:18:12

XLON

379

787.2

16:18:44

XLON

519

787

16:18:47

XLON

375

786.6

16:19:01

XLON

530

787.4

16:21:33

XLON

785

787.8

16:21:33

XLON

815

787.6

16:21:33

XLON

575

786.8

16:21:48

XLON

133

788.6

16:23:51

XLON

177

788.6

16:23:51

XLON

908

788.2

16:23:52

XLON

504

788.8

16:25:25

XLON

674

788.6

16:25:25

XLON

715

788.4

16:26:06

XLON

710

788.4

16:26:53

XLON

300

788.2

16:27:07

XLON

174

788.2

16:28:22

XLON

231

788.2

16:28:22

XLON

279

788.2

16:28:22

XLON

490

788.2

16:28:22

XLON

704

788

16:28:22

XLON

1,290

787.8

16:28:22

XLON

555

788.2

16:28:33

XLON

1,625

788.4

16:29:17

XLON

3

788.4

16:29:52

XLON

710

788.4

16:29:52

XLON

1,202

788.4

16:29:52

XLON

50

788.8

16:29:58

XLON

11

788.2

16:35:16

XLON

49

788.2

16:35:16

XLON

89

788.2

16:35:16

XLON

97

788.2

16:35:16

XLON

619

788.2

16:35:16

XLON

634

788.2

16:35:16

XLON

694

788.2

16:35:16

XLON

806

788.2

16:35:16

XLON

924

788.2

16:35:16

XLON

1,479

788.2

16:35:16

XLON

1,611

788.2

16:35:16

XLON

1,755

788.2

16:35:16

XLON

1,971

788.2

16:35:16

XLON

2,561

788.2

16:35:16

XLON

2,907

788.2

16:35:16

XLON

5,019

788.2

16:35:16

XLON

5,720

788.2

16:35:16

XLON

7,124

788.2

16:35:16

XLON

7,996

788.2

16:35:16

XLON

13,581

788.2

16:35:16

XLON

20,708

788.2

16:35:16

XLON

29,551

788.2

16:35:16

XLON

36,450

788.2

16:35:16

XLON

38,938

788.2

16:35:16

XLON