Transaction in Own Shares

29 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 29 October 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 793.7685 pence per share:

Number of ordinary shares purchased:

353,200

Highest purchase price paid per share:

798.4000p

Lowest purchase price paid per share:

792.4000p

Following the above transaction, the Company has 868,581,846 ordinary shares in issue and holds 5,212,280 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 863,369,566 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

451

798.4

14:46:43

XLON

474

798.2

14:46:43

XLON

296

797.6

14:50:32

XLON

288

798.2

14:57:32

XLON

349

798.0

14:57:32

XLON

509

797.4

14:59:14

XLON

290

796.6

15:00:05

XLON

395

796.2

15:00:36

XLON

463

795.6

15:01:23

XLON

9

795.2

15:03:00

XLON

50

795.2

15:03:00

XLON

245

795.2

15:03:00

XLON

125

795.0

15:11:04

XLON

403

795.0

15:11:04

XLON

876

794.8

15:15:07

XLON

9

795.0

15:20:01

XLON

584

795.0

15:20:01

XLON

357

794.6

15:25:58

XLON

2

794.2

15:33:45

XLON

17

794.2

15:33:45

XLON

111

794.2

15:33:45

XLON

528

794.2

15:33:45

XLON

898

794.2

15:33:45

XLON

1,680

794.4

15:33:45

XLON

127

793.8

15:39:23

XLON

201

794.0

15:39:23

XLON

576

794.0

15:39:23

XLON

408

795.4

15:47:10

XLON

2,290

795.2

15:47:58

XLON

224

796.2

15:52:55

XLON

284

796.2

15:52:55

XLON

387

796.2

15:52:55

XLON

1,626

796.0

15:53:10

XLON

492

795.6

15:53:37

XLON

638

795.4

15:53:37

XLON

216

795.0

15:53:43

XLON

354

795.0

15:53:43

XLON

910

795.4

15:56:39

XLON

289

795.2

15:56:47

XLON

8

795.0

15:56:59

XLON

988

795.0

15:56:59

XLON

2,168

794.8

15:58:17

XLON

652

795.0

16:00:57

XLON

960

795.0

16:02:03

XLON

288

795.4

16:06:59

XLON

595

795.2

16:09:00

XLON

628

795.2

16:09:00

XLON

538

795.2

16:09:01

XLON

906

795.0

16:09:57

XLON

1,326

795.0

16:09:57

XLON

321

794.8

16:11:52

XLON

570

795.0

16:11:52

XLON

1

794.6

16:12:15

XLON

406

794.6

16:12:15

XLON

635

794.8

16:13:03

XLON

309

794.8

16:15:09

XLON

1,763

794.4

16:15:52

XLON

380

794.2

16:15:53

XLON

321

793.6

16:17:05

XLON

541

793.4

16:18:21

XLON

644

792.4

16:18:21

XLON

208

794.0

16:20:40

XLON

265

794.0

16:20:40

XLON

850

794.6

16:22:49

XLON

280

794.6

16:23:23

XLON

300

794.6

16:24:19

XLON

584

794.6

16:24:19

XLON

178

794.6

16:24:27

XLON

445

794.4

16:24:27

XLON

768

794.6

16:24:27

XLON

968

794.4

16:24:27

XLON

1,376

795.0

16:25:50

XLON

300

794.4

16:26:24

XLON

489

794.4

16:26:24

XLON

481

794.2

16:28:18

XLON

1,737

794.0

16:29:12

XLON

33

794.0

16:29:27

XLON

187

794.0

16:29:27

XLON

275

794.0

16:29:27

XLON

408

794.0

16:29:27

XLON

279

793.8

16:29:28

XLON

948

793.8

16:29:28

XLON

376

793.6

16:29:29

XLON

186

793.6

16:29:50

XLON

408

793.6

16:29:50

XLON

410

793.6

16:29:50

XLON

156

793.6

16:29:54

XLON

47

793.6

16:29:56

XLON

156

793.6

16:29:56

XLON

1,151

793.6

16:29:56

XLON

22

793.6

16:29:57

XLON

5

793.6

16:35:26

XLON

12

793.6

16:35:26

XLON

18

793.6

16:35:26

XLON

56

793.6

16:35:26

XLON

241

793.6

16:35:26

XLON

275

793.6

16:35:26

XLON

342

793.6

16:35:26

XLON

415

793.6

16:35:26

XLON

463

793.6

16:35:26

XLON

552

793.6

16:35:26

XLON

748

793.6

16:35:26

XLON

830

793.6

16:35:26

XLON

1,166

793.6

16:35:26

XLON

1,272

793.6

16:35:26

XLON

1,341

793.6

16:35:26

XLON

1,530

793.6

16:35:26

XLON

1,539

793.6

16:35:26

XLON

1,566

793.6

16:35:26

XLON

1,654

793.6

16:35:26

XLON

1,876

793.6

16:35:26

XLON

2,030

793.6

16:35:26

XLON

2,035

793.6

16:35:26

XLON

2,054

793.6

16:35:26

XLON

2,090

793.6

16:35:26

XLON

2,225

793.6

16:35:26

XLON

3,414

793.6

16:35:26

XLON

3,809

793.6

16:35:26

XLON

4,400

793.6

16:35:26

XLON

5,101

793.6

16:35:26

XLON

6,173

793.6

16:35:26

XLON

6,254

793.6

16:35:26

XLON

6,936

793.6

16:35:26

XLON

7,730

793.6

16:35:26

XLON

9,750

793.6

16:35:26

XLON

11,975

793.6

16:35:26

XLON

12,631

793.6

16:35:26

XLON

15,678

793.6

16:35:26

XLON

17,771

793.6

16:35:26

XLON

19,112

793.6

16:35:26

XLON

20,567

793.6

16:35:26

XLON

22,701

793.6

16:35:26

XLON

41,039

793.6

16:35:26

XLON

64,174

793.6

16:35:26

XLON