Transaction in Own Shares

15 December 2025

Auto Trader Group plc ("Auto Trader" or the "Company")

Auto Trader Group plc Transaction in Own Shares

In addition to the announcement made on 12 December 2025, Auto Trader Group plc (the "Company") announces that on 11 December 2025 it purchased through Deutsche Bank AG, London Branch (trading for these purposes as Deutsche Numis) ("Deutsche Numis") the following number of its ordinary shares for Cancellation at an average price of 596.6269 pence per share:

Number of ordinary shares purchased:

700,000

Highest purchase price paid per share:

598.80p

Lowest purchase price paid per share:

593.20p

Following the above transaction, but not including the impact of the earlier announcement made on 12 December 2025, the Company had 854,812,722 ordinary shares in issue and held 4,786,344 ordinary shares in treasury. Therefore, as at 11 December 2025, the total number of voting rights in the Company was 850,026,378 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 Deutsche Numis 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 ordinary shares purchased

Transaction price(GBp share)

Time of transaction (UK Time)

Trading venue

169

598.00

 08:19:04

XLON

182

598.00

 08:19:04

XLON

1734

598.60

 08:20:49

XLON

1680

598.40

 08:21:25

XLON

1684

597.60

 08:23:19

XLON

135

598.00

 08:28:20

XLON

1459

598.00

 08:28:20

XLON

156

598.00

 08:28:20

XLON

952

597.60

 08:28:50

XLON

1004

597.60

 08:28:50

XLON

1731

597.60

 08:29:16

XLON

1724

596.60

 08:32:01

XLON

1663

597.20

 08:36:15

XLON

131

598.20

 08:39:58

XLON

250

598.20

 08:39:58

XLON

293

598.20

 08:39:58

XLON

1543

598.00

 08:40:05

XLON

1744

597.80

 08:40:12

XLON

905

598.60

 08:42:41

XLON

796

598.60

 08:42:41

XLON

657

598.80

 08:42:41

XLON

178

598.80

 08:42:41

XLON

380

598.80

 08:42:41

XLON

222

598.80

 08:42:41

XLON

1651

598.40

 08:45:10

XLON

1665

598.20

 08:46:18

XLON

33

598.20

 08:46:18

XLON

1554

597.40

 08:47:09

XLON

1606

596.80

 08:48:40

XLON

1543

597.60

 08:52:13

XLON

1749

597.20

 08:53:50

XLON

1637

597.00

 08:55:31

XLON

380

596.80

 08:55:45

XLON

250

596.80

 08:55:45

XLON

605

596.80

 08:55:45

XLON

172

596.80

 08:55:45

XLON

92

596.80

 08:55:45

XLON

383

597.20

 09:00:14

XLON

1265

597.20

 09:00:14

XLON

1562

597.00

 09:00:40

XLON

1527

596.60

 09:01:10

XLON

1565

597.00

 09:07:10

XLON

1460

597.00

 09:10:47

XLON

102

597.00

 09:10:47

XLON

1586

596.80

 09:12:20

XLON

346

596.20

 09:15:08

XLON

1214

596.20

 09:15:08

XLON

657

597.40

 09:20:01

XLON

966

597.20

 09:20:02

XLON

1031

597.20

 09:20:02

XLON

1742

597.00

 09:20:11

XLON

1621

596.80

 09:20:30

XLON

1594

596.80

 09:21:12

XLON

657

596.80

 09:21:12

XLON

139

596.80

 09:21:12

XLON

1045

596.80

 09:21:12

XLON

139

596.80

 09:21:12

XLON

95

596.80

 09:21:12

XLON

1485

596.80

 09:21:12

XLON

1666

597.00

 09:23:11

XLON

1149

596.80

 09:24:05

XLON

456

596.80

 09:24:05

XLON

170

596.80

 09:24:26

XLON

1246

596.80

 09:24:26

XLON

1583

596.60

 09:25:10

XLON

1600

596.40

 09:26:40

XLON

1530

596.20

 09:27:17

XLON

1096

596.00

 09:27:35

XLON

603

596.00

 09:27:35

XLON

1713

596.00

 09:28:06

XLON

1579

596.80

 09:29:30

XLON

658

596.80

 09:30:22

XLON

788

596.80

 09:30:22

XLON

1642

597.00

 09:37:19

XLON

1666

596.80

 09:37:22

XLON

1618

596.80

 09:44:30

XLON

1521

598.00

 09:50:03

XLON

1646

598.00

 09:50:03

XLON

966

597.80

 09:50:03

XLON

555

597.80

 09:50:05

XLON

1567

597.80

 09:50:05

XLON

668

598.00

 09:54:18

XLON

1060

598.00

 09:54:18

XLON

1599

597.80

 09:59:55

XLON

1505

597.60

 10:01:33

XLON

1535

597.60

 10:02:47

XLON

1565

598.00

 10:06:14

XLON

650

598.00

 10:06:14

XLON

969

598.00

 10:06:14

XLON

1676

598.40

 10:12:29

XLON

1742

598.20

 10:12:53

XLON

1588

597.80

 10:15:37

XLON

1678

597.80

 10:19:03

XLON

1569

598.00

 10:24:25

XLON

782

598.20

 10:26:12

XLON

782

598.20

 10:26:12

XLON

1502

598.00

 10:26:38

XLON

1481

597.80

 10:27:32

XLON

1733

597.40

 10:30:06

XLON

752

597.60

 10:37:40

XLON

33

597.60

 10:37:40

XLON

293

597.60

 10:37:40

XLON

146

597.40

 10:37:59

XLON

1899

597.40

 10:37:59

XLON

650

597.40

 10:37:59

XLON

993

597.40

 10:37:59

XLON

1499

597.20

 10:38:27

XLON

1495

597.20

 10:41:37

XLON

119

596.80

 10:41:38

XLON

1630

596.80

 10:41:56

XLON

1714

596.60

 10:47:30

XLON

1749

596.40

 10:49:25

XLON

1569

596.20

 10:50:04

XLON

1437

596.40

 10:53:02

XLON

73

596.20

 10:56:15

XLON

1527

596.20

 10:56:15

XLON

1638

596.00

 10:58:16

XLON

5024

596.00

 10:58:16

XLON

3531

596.00

 10:58:16

XLON

1708

596.40

 11:01:11

XLON

1411

596.40

 11:01:11

XLON

423

596.40

 11:01:40

XLON

294

596.40

 11:01:40

XLON

380

596.40

 11:01:40

XLON

431

596.20

 11:02:09

XLON

1009

596.20

 11:02:09

XLON

761

597.00

 11:08:20

XLON

869

597.00

 11:08:20

XLON

1679

596.80

 11:11:53

XLON

1168

596.60

 11:13:23

XLON

239

596.60

 11:13:23

XLON

510

596.40

 11:13:23

XLON

1117

596.40

 11:13:23

XLON

961

596.40

 11:17:00

XLON

778

596.40

 11:17:00

XLON

1554

596.00

 11:20:07

XLON

3850

596.00

 11:20:07

XLON

4608

596.00

 11:20:07

XLON

694

596.00

 11:20:07

XLON

957

596.00

 11:20:07

XLON

9113

596.00

 11:20:07

XLON

2345

596.00

 11:20:07

XLON

530

596.00

 11:20:07

XLON

8304

596.00

 11:20:07

XLON

1039

596.00

 11:20:07

XLON

8708

596.00

 11:20:07

XLON

635

596.00

 11:20:07

XLON

800

596.00

 11:20:07

XLON

8103

596.00

 11:20:07

XLON

1969

596.00

 11:20:07

XLON

1870

596.00

 11:20:07

XLON

190

596.00

 11:20:07

XLON

1342

596.00

 11:20:07

XLON

7711

596.00

 11:20:07

XLON

12123

596.20

 11:23:32

XLON

1514

596.20

 11:23:32

XLON

1308

596.00

 11:23:32

XLON

489

596.20

 11:25:43

XLON

1579

596.20

 11:25:43

XLON

1693

597.00

 11:30:00

XLON

650

597.00

 11:30:00

XLON

1612

596.80

 11:30:22

XLON

1587

596.60

 11:33:17

XLON

1820

596.60

 11:39:44

XLON

297

596.60

 11:39:44

XLON

584

596.60

 11:39:44

XLON

648

596.60

 11:39:44

XLON

1140

596.60

 11:40:50

XLON

364

596.60

 11:40:50

XLON

710

596.40

 11:42:19

XLON

814

596.40

 11:42:19

XLON

800

596.60

 11:47:00

XLON

933

596.60

 11:47:00

XLON

770

596.60

 11:48:48

XLON

637

596.60

 11:48:48

XLON

1068

596.60

 11:51:00

XLON

210

596.60

 11:51:00

XLON

142

596.60

 11:51:00

XLON

279

596.60

 11:51:00

XLON

1633

596.40

 11:53:56

XLON

353

596.40

 11:55:39

XLON

1121

596.40

 11:55:39

XLON

338

596.40

 12:01:20

XLON

250

596.40

 12:01:20

XLON

1068

596.40

 12:01:20

XLON

1691

596.20

 12:01:40

XLON

16

596.20

 12:01:40

XLON

463

596.00

 12:02:38

XLON

3

596.00

 12:02:38

XLON

7509

596.00

 12:02:38

XLON

3

596.00

 12:02:38

XLON

4668

596.00

 12:02:38

XLON

4976

596.00

 12:02:38

XLON

5520

596.00

 12:02:38

XLON

4668

596.00

 12:02:38

XLON

1091

596.00

 12:02:38

XLON

979

595.80

 12:02:38

XLON

1000

595.80

 12:02:38

XLON

1068

595.80

 12:02:38

XLON

1885

595.60

 12:02:39

XLON

1599

595.40

 12:03:14

XLON

1441

595.40

 12:07:52

XLON

1422

595.20

 12:12:08

XLON

290

595.20

 12:12:08

XLON

1753

594.60

 12:12:08

XLON

1068

595.20

 12:19:49

XLON

250

595.20

 12:19:49

XLON

182

595.20

 12:19:49

XLON

380

595.20

 12:19:49

XLON

2540

595.20

 12:19:49

XLON

1068

595.20

 12:19:49

XLON

426

595.20

 12:19:49

XLON

1363

594.80

 12:22:23

XLON

480

594.80

 12:22:23

XLON

544

595.20

 12:25:10

XLON

929

595.20

 12:25:10

XLON

1068

595.20

 12:25:57

XLON

254

595.40

 12:27:50

XLON

270

595.40

 12:28:52

XLON

250

595.40

 12:28:52

XLON

909

595.40

 12:28:52

XLON

1413

595.20

 12:29:13

XLON

1586

595.20

 12:32:24

XLON

1424

595.20

 12:32:24

XLON

1633

595.00

 12:32:25

XLON

1745

595.00

 12:34:53

XLON

1672

594.40

 12:37:38

XLON

1202

594.20

 12:41:15

XLON

442

594.20

 12:41:15

XLON

348

594.80

 12:45:40

XLON

703

594.80

 12:45:40

XLON

1663

594.60

 12:47:40

XLON

1466

594.80

 12:53:42

XLON

1068

594.80

 12:53:42

XLON

2565

594.80

 12:57:44

XLON

1612

594.60

 12:57:44

XLON

1461

594.60

 12:59:47

XLON

1457

594.60

 13:01:58

XLON

260

594.60

 13:01:58

XLON

304

594.40

 13:03:50

XLON

1399

594.40

 13:03:50

XLON

1727

594.40

 13:07:16

XLON

1489

594.20

 13:10:32

XLON

1108

594.20

 13:18:28

XLON

411

594.20

 13:20:00

XLON

1551

594.20

 13:20:00

XLON

1802

594.00

 13:21:39

XLON

555

594.80

 13:25:30

XLON

660

594.80

 13:25:30

XLON

1336

594.80

 13:25:30

XLON

1489

594.80

 13:29:36

XLON

1619

594.80

 13:29:36

XLON

1579

594.60

 13:32:00

XLON

1668

594.40

 13:32:00

XLON

770

595.00

 13:35:40

XLON

8

595.00

 13:36:41

XLON

801

595.00

 13:36:58

XLON

1438

595.00

 13:39:00

XLON

711

594.80

 13:39:40

XLON

727

594.80

 13:39:40

XLON

1744

594.60

 13:39:45

XLON

26

594.60

 13:44:35

XLON

140

594.60

 13:44:56

XLON

301

594.60

 13:46:35

XLON

347

594.60

 13:46:35

XLON

87

594.60

 13:46:37

XLON

740

594.60

 13:46:37

XLON

1714

594.60

 13:46:37

XLON

1541

594.60

 13:48:15

XLON

1514

594.40

 13:49:13

XLON

1440

594.20

 13:53:40

XLON

1860

594.00

 13:53:57

XLON

377

593.80

 13:55:10

XLON

1245

593.80

 13:55:10

XLON

2117

593.60

 14:01:29

XLON

428

593.40

 14:01:29

XLON

1570

593.40

 14:01:29

XLON

229

593.20

 14:03:15

XLON

1394

593.20

 14:04:25

XLON

335

593.40

 14:08:15

XLON

323

593.60

 14:09:30

XLON

1253

593.60

 14:09:30

XLON

938

594.20

 14:11:57

XLON

337

594.20

 14:11:57

XLON

2443

594.00

 14:11:57

XLON

338

594.20

 14:14:48

XLON

250

594.20

 14:14:48

XLON

938

594.20

 14:14:48

XLON

1443

594.00

 14:15:48

XLON

210

594.00

 14:15:48

XLON

1423

594.40

 14:16:12

XLON

653

594.60

 14:18:15

XLON

981

594.60

 14:18:15

XLON

909

594.60

 14:20:35

XLON

806

594.60

 14:20:35

XLON

298

594.60

 14:23:15

XLON

1400

594.60

 14:23:15

XLON

192

594.60

 14:26:09

XLON

1513

594.60

 14:26:09

XLON

1459

594.40

 14:27:25

XLON

886

595.00

 14:28:38

XLON

439

595.00

 14:28:38

XLON

236

595.00

 14:28:38

XLON

1406

595.00

 14:30:08

XLON

1739

596.20

 14:33:34

XLON

1649

596.40

 14:36:30

XLON

1543

596.20

 14:37:06

XLON

1625

596.20

 14:41:40

XLON

812

596.80

 14:46:29

XLON

1288

596.80

 14:46:50

XLON

431

596.80

 14:46:50

XLON

1481

596.60

 14:46:52

XLON

1516

596.60

 14:46:52

XLON

1821

596.40

 14:46:52

XLON

953

597.40

 14:50:00

XLON

1525

597.40

 14:50:00

XLON

905

597.40

 14:50:00

XLON

647

597.40

 14:50:00

XLON

1972

597.20

 14:50:17

XLON

2666

597.80

 14:52:51

XLON

1460

597.80

 14:52:51

XLON

1484

598.00

 14:55:53

XLON

880

598.00

 14:55:53

XLON

1419

597.80

 14:56:20

XLON

254

597.80

 14:56:20

XLON

772

598.00

 14:57:22

XLON

1101

598.00

 14:57:22

XLON

347

598.00

 14:57:22

XLON

47

598.00

 14:57:22

XLON

2452

598.00

 14:57:22

XLON

1576

597.80

 14:57:38

XLON

1324

597.80

 15:01:20

XLON

1579

597.80

 15:01:20

XLON

183

597.80

 15:01:20

XLON

1194

597.60

 15:01:31

XLON

711

597.60

 15:01:31

XLON

1628

597.40

 15:02:01

XLON

160

597.00

 15:02:02

XLON

1483

597.00

 15:02:03

XLON

1606

597.00

 15:04:50

XLON

1737

596.80

 15:04:57

XLON

378

596.80

 15:04:57

XLON

257

597.00

 15:08:08

XLON

324

597.00

 15:08:08

XLON

1628

597.00

 15:09:26

XLON

222

597.00

 15:09:26

XLON

1680

597.00

 15:09:26

XLON

531

596.80

 15:11:32

XLON

1202

596.80

 15:11:32

XLON

1740

596.60

 15:11:32

XLON

1676

596.60

 15:12:27

XLON

216

596.40

 15:13:51

XLON

1303

596.40

 15:13:51

XLON

251

596.60

 15:14:33

XLON

1101

596.60

 15:14:33

XLON

2415

596.40

 15:14:39

XLON

579

597.00

 15:16:32

XLON

2724

597.00

 15:16:32

XLON

3808

597.00

 15:16:32

XLON

315

597.20

 15:17:40

XLON

253

597.20

 15:17:40

XLON

2718

597.20

 15:17:40

XLON

35018

597.20

 15:17:40

XLON

952

597.20

 15:17:40

XLON

1459

597.20

 15:17:40

XLON

1459

597.20

 15:17:40

XLON

1077

597.20

 15:17:40

XLON

28

597.20

 15:17:40

XLON

3828

597.20

 15:17:40

XLON

495

597.00

 15:17:40

XLON

1468

597.00

 15:18:37

XLON

2718

597.00

 15:18:37

XLON

1640

596.80

 15:19:07

XLON

10

596.80

 15:21:33

XLON

1570

596.80

 15:21:33

XLON

1436

596.80

 15:21:33

XLON

888

596.40

 15:21:35

XLON

1626

596.40

 15:21:35

XLON

2764

596.60

 15:24:15

XLON

1995

596.60

 15:25:10

XLON

2718

596.80

 15:26:16

XLON

755

596.80

 15:28:13

XLON

1677

596.80

 15:28:13

XLON

60

596.80

 15:28:13

XLON

1849

596.80

 15:28:13

XLON

258

596.80

 15:28:13

XLON

333

596.80

 15:28:13

XLON

422

596.80

 15:29:06

XLON

1247

596.80

 15:29:06

XLON

250

596.80

 15:29:15

XLON

390

596.80

 15:29:15

XLON

250

596.80

 15:29:15

XLON

950

596.80

 15:30:10

XLON

1236

596.60

 15:30:11

XLON

409

596.60

 15:30:11

XLON

12

596.60

 15:31:11

XLON

1592

596.60

 15:31:11

XLON

260

596.60

 15:31:11

XLON

1522

596.60

 15:32:58

XLON

1604

596.60

 15:32:58

XLON

1891

596.40

 15:33:44

XLON

1822

596.20

 15:33:47

XLON

1502

596.80

 15:39:12

XLON

3149

596.80

 15:39:12

XLON

1737

596.80

 15:39:12

XLON

1032

596.80

 15:39:12

XLON

264

596.80

 15:39:12

XLON

1087

596.60

 15:39:28

XLON

337

596.60

 15:39:28

XLON

1751

596.60

 15:39:28

XLON

1939

596.80

 15:41:45

XLON

791

596.80

 15:41:45

XLON

2021

596.80

 15:42:45

XLON

1527

596.80

 15:42:45

XLON

289

596.80

 15:42:45

XLON

526

596.80

 15:42:45

XLON

1733

596.60

 15:42:45

XLON

1701

596.40

 15:42:46

XLON

1567

597.40

 15:46:05

XLON

2704

597.40

 15:47:05

XLON

2193

597.20

 15:47:31

XLON

2280

597.00

 15:47:32

XLON

142

597.40

 15:49:08

XLON

2026

597.40

 15:49:08

XLON

1615

597.40

 15:50:41

XLON

1684

597.40

 15:50:41

XLON

2151

597.20

 15:51:41

XLON

2481

597.00

 15:51:48

XLON

2046

597.20

 15:53:48

XLON

318

597.20

 15:53:48

XLON

453

597.20

 15:54:24

XLON

752

597.20

 15:54:24

XLON

268

597.20

 15:54:24

XLON

835

597.80

 15:56:29

XLON

7

597.80

 15:56:29

XLON

4740

597.80

 15:56:29

XLON

1

597.80

 15:56:29

XLON

9

597.80

 15:56:29

XLON

4

597.80

 15:56:29

XLON

121

597.80

 15:56:29

XLON

328

597.80

 15:56:29

XLON

579

597.80

 15:57:19

XLON

1103

597.80

 15:57:19

XLON

22

597.80

 15:57:19

XLON

1674

597.80

 15:57:19

XLON

2360

598.00

 15:58:35

XLON

1210

598.00

 15:58:35

XLON

372

598.00

 15:58:35

XLON

329

598.00

 16:00:02

XLON

2161

598.00

 16:00:02

XLON

1750

598.00

 16:00:02

XLON

1615

598.00

 16:00:41

XLON

21

598.00

 16:00:41

XLON

757

598.00

 16:00:41

XLON

1527

598.00

 16:00:41

XLON

54

598.00

 16:00:41

XLON

1744

598.00

 16:00:41

XLON

2217

597.80

 16:02:45

XLON

2195

598.00

 16:03:45

XLON

1527

598.00

 16:04:45

XLON

1084

598.00

 16:04:45

XLON

1803

598.00

 16:04:45

XLON

1527

598.00

 16:04:48

XLON

401

598.00

 16:04:48

XLON

1421

597.80

 16:04:52

XLON

245

597.80

 16:04:52

XLON

57

597.80

 16:05:42

XLON

1409

598.00

 16:07:22

XLON

4371

598.00

 16:07:22

XLON

261

598.00

 16:07:22

XLON

1580

597.80

 16:09:06

XLON

2039

597.80

 16:09:06

XLON

1742

597.80

 16:09:06

XLON

700

597.80

 16:09:06

XLON

1503

597.60

 16:09:15

XLON

1740

597.60

 16:09:15

XLON

1725

597.40

 16:09:42

XLON

286

597.40

 16:11:05

XLON

1009

597.40

 16:11:06

XLON

301

597.40

 16:11:06

XLON

939

598.00

 16:12:28

XLON

410

598.00

 16:12:28

XLON

175

598.00

 16:12:28

XLON

250

598.00

 16:12:28

XLON

2980

598.00

 16:12:28

XLON

803

597.80

 16:12:28

XLON

762

597.80

 16:12:28

XLON

1653

597.80

 16:12:28

XLON

202

598.00

 16:14:17

XLON

2489

598.00

 16:14:17

XLON

282

598.00

 16:14:17

XLON

661

598.00

 16:14:35

XLON

236

598.00

 16:14:35

XLON

283

598.00

 16:14:35

XLON

420

598.00

 16:14:35

XLON

1501

597.80

 16:15:14

XLON

348

597.80

 16:15:45

XLON

975

597.80

 16:15:45

XLON

2362

597.80

 16:17:12

XLON

3127

597.80

 16:17:12

XLON

700

597.80

 16:17:12

XLON

420

597.80

 16:17:12

XLON

950

597.80

 16:17:32

XLON

1124

597.80

 16:17:32

XLON

4

597.80

 16:17:32

XLON

1501

597.60

 16:18:00

XLON

484

597.60

 16:18:00

XLON

2228

597.60

 16:19:00

XLON

1803

597.40

 16:19:01

XLON

4204

597.80

 16:20:23

XLON

1527

597.80

 16:20:54

XLON

255

597.80

 16:20:54

XLON

1744

597.80

 16:20:54

XLON

2411

597.60

 16:20:58

XLON

1930

598.00

 16:22:11

XLON

1637

597.80

 16:22:14

XLON

469

597.80

 16:22:22

XLON

102

597.80

 16:22:22

XLON

129

597.80

 16:22:22

XLON

700

597.80

 16:22:22

XLON

1000

597.80

 16:22:22

XLON

420

597.80

 16:22:22

XLON

3414

597.80

 16:22:55

XLON

1527

597.80

 16:24:22

XLON

380

597.80

 16:24:22

XLON

3240

597.80

 16:24:22

XLON