Transaction in Own Shares

11 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 11 September 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 783.0921 pence per share:

Number of ordinary shares purchased:

313,400

Highest purchase price paid per share:

785.0000p

Lowest purchase price paid per share:

779.0000p

Following the above transaction, the Company has 875,736,482 ordinary shares in issue and holds 5,233,960 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 870,502,522 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

312

784.2

08:20:58

XLON

470

783.4

08:35:39

XLON

393

783.4

08:42:41

XLON

559

784

08:49:26

XLON

153

783.6

08:52:32

XLON

195

784.4

08:57:30

XLON

364

784.4

08:57:46

XLON

638

784.2

09:01:49

XLON

983

783.8

09:02:40

XLON

226

783.6

09:02:42

XLON

437

783.6

09:02:42

XLON

142

784.2

09:10:12

XLON

791

784.2

09:10:12

XLON

369

784.8

09:27:12

XLON

547

784.8

09:28:18

XLON

301

784.4

09:30:20

XLON

465

784.6

09:30:20

XLON

795

784.4

09:30:20

XLON

1,100

784.2

09:30:24

XLON

586

785

09:38:38

XLON

104

784.8

09:38:43

XLON

264

784.8

09:38:43

XLON

442

785

09:48:27

XLON

306

784.2

09:50:12

XLON

363

784.6

09:50:12

XLON

451

784.4

09:50:12

XLON

283

783.6

09:58:17

XLON

10

783.4

09:59:15

XLON

509

783.4

09:59:15

XLON

290

782.8

10:03:17

XLON

293

782.6

10:03:20

XLON

921

784.2

10:15:30

XLON

565

784

10:16:53

XLON

815

783.6

10:25:30

XLON

181

783.8

10:34:47

XLON

362

783.8

10:34:47

XLON

383

783.4

10:35:52

XLON

426

783

10:38:19

XLON

440

782.8

10:45:49

XLON

9

782.6

10:54:56

XLON

9

782.6

10:54:56

XLON

452

782.6

10:54:56

XLON

551

782.4

10:55:44

XLON

292

782

11:02:01

XLON

539

783

11:08:10

XLON

548

782.8

11:08:13

XLON

320

783

11:36:24

XLON

428

782.6

11:36:26

XLON

702

782.4

11:36:27

XLON

355

782.2

11:36:28

XLON

391

782.2

11:57:10

XLON

1,381

781.8

12:02:01

XLON

438

781.4

12:02:25

XLON

373

781.2

12:02:33

XLON

710

780.8

12:15:15

XLON

313

780.2

12:16:50

XLON

323

779.4

12:25:43

XLON

444

779

12:26:34

XLON

900

780.4

12:33:27

XLON

1,821

783

12:48:50

XLON

1,146

782.8

13:02:24

XLON

1,310

782.6

13:11:40

XLON

1,145

782.2

13:12:53

XLON

466

783

13:21:12

XLON

376

783.8

13:23:59

XLON

701

783.4

13:28:32

XLON

1,744

783

13:30:05

XLON

1,173

782.8

13:30:06

XLON

1,027

782.6

13:30:07

XLON

504

783.2

13:30:40

XLON

614

783.2

13:31:44

XLON

908

783

13:32:38

XLON

745

782.8

13:33:06

XLON

378

782.4

13:34:54

XLON

609

782

13:36:48

XLON

655

782.4

13:56:52

XLON

612

782.4

13:58:04

XLON

378

782.2

14:03:48

XLON

1,117

782.2

14:03:48

XLON

533

781.8

14:07:08

XLON

438

782.6

14:09:06

XLON

218

782.4

14:11:37

XLON

625

782.4

14:11:37

XLON

564

782.2

14:11:55

XLON

610

781.8

14:12:30

XLON

917

781.6

14:12:30

XLON

109

781.6

14:13:23

XLON

315

781.4

14:16:10

XLON

186

781.2

14:16:15

XLON

460

781.2

14:16:15

XLON

480

781

14:33:10

XLON

980

780.8

14:33:20

XLON

1,048

780.4

14:33:35

XLON

344

780.2

14:33:41

XLON

581

780.2

14:33:41

XLON

373

782.8

14:56:15

XLON

1,522

782.4

15:00:18

XLON

241

782.2

15:00:20

XLON

571

782.2

15:00:20

XLON

739

781.8

15:01:48

XLON

467

781.6

15:01:51

XLON

519

781.6

15:01:51

XLON

1,273

781.4

15:01:51

XLON

1,388

781.2

15:02:50

XLON

44

781.8

15:10:40

XLON

885

781.8

15:10:40

XLON

861

781.6

15:10:50

XLON

223

781.2

15:13:21

XLON

120

781.2

15:13:47

XLON

774

781

15:14:45

XLON

911

781.8

15:22:50

XLON

125

781.4

15:22:52

XLON

1,362

781.4

15:22:52

XLON

1,190

781.4

15:26:01

XLON

1,104

781.4

15:28:40

XLON

1,279

781

15:29:07

XLON

1,588

781

15:29:07

XLON

654

780.8

15:30:27

XLON

694

780.6

15:30:35

XLON

1,309

780.4

15:30:35

XLON

370

780.2

15:30:39

XLON

619

780.2

15:30:39

XLON

480

780.2

15:40:43

XLON

301

780

15:45:51

XLON

714

780

15:45:51

XLON

740

780.6

15:48:35

XLON

1,496

780.4

15:50:37

XLON

72

780

15:51:22

XLON

567

780

15:51:22

XLON

315

779.6

15:51:26

XLON

415

779.8

15:51:26

XLON

872

779.6

15:51:26

XLON

701

779.4

15:51:27

XLON

490

780.6

15:59:00

XLON

663

782

16:00:07

XLON

3,708

781.8

16:00:12

XLON

288

782.2

16:04:19

XLON

826

782.2

16:04:19

XLON

112

784.4

16:14:20

XLON

3,725

784.8

16:18:51

XLON

132

784.6

16:19:37

XLON

251

784.6

16:19:37

XLON

1,097

784.6

16:19:37

XLON

1,821

784.4

16:21:08

XLON

2,370

784.4

16:21:08

XLON

210

784.2

16:21:16

XLON

1,044

784.2

16:21:16

XLON

55

783.8

16:21:24

XLON

554

784

16:21:24

XLON

610

784

16:21:24

XLON

864

783.8

16:21:24

XLON

679

783.4

16:23:49

XLON

1,020

784

16:26:02

XLON

633

783.6

16:26:21

XLON

209

783.6

16:26:38

XLON

421

783.6

16:26:38

XLON

945

783.4

16:26:41

XLON

160

783.4

16:26:59

XLON

376

783.2

16:26:59

XLON

398

783.4

16:26:59

XLON

1,574

783.2

16:26:59

XLON

173

783.2

16:27:41

XLON

118

783.2

16:27:48

XLON

147

783.2

16:27:57

XLON

12

783.6

16:28:10

XLON

128

783.6

16:28:10

XLON

227

783.6

16:28:10

XLON

421

783.6

16:28:10

XLON

122

783.6

16:28:18

XLON

117

783.2

16:28:36

XLON

157

783.2

16:28:46

XLON

102

783.6

16:29:18

XLON

187

783.4

16:35:09

XLON

327

783.4

16:35:09

XLON

358

783.4

16:35:09

XLON

825

783.4

16:35:09

XLON

994

783.4

16:35:09

XLON

1,882

783.4

16:35:09

XLON

1,948

783.4

16:35:09

XLON

4,166

783.4

16:35:09

XLON

9,928

783.4

16:35:09

XLON

10,719

783.4

16:35:09

XLON

12,811

783.4

16:35:09

XLON

14,778

783.4

16:35:09

XLON

19,948

783.4

16:35:09

XLON

23,724

783.4

16:35:09

XLON

24,505

783.4

16:35:09

XLON

36,181

783.4

16:35:09

XLON

42,733

783.4

16:35:09

XLON