REG - Auto Trader Grp - Transaction in Own Shares

1 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 1 September 2025 it purchased through Merrill Lynch International the following number of its ordinary shares for Cancellation at an average price of 800.3265 pence per share:

Number of ordinary shares purchased:

163,448

Highest purchase price paid per share:

804.6000p

Lowest purchase price paid per share:

798.8000p

Following the above transaction, the Company has 877,994,758 ordinary shares in issue and holds 5,236,671 ordinary shares in treasury. Therefore, the total number of voting rights in the Company is 872,758,087 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

275

804.6

10:00:28

XLON

396

803

10:31:13

XLON

352

802.8

10:33:21

XLON

467

802.4

10:36:55

XLON

403

802

10:37:57

XLON

21

801.6

10:42:27

XLON

401

801.6

10:42:27

XLON

1,491

803.4

11:18:20

XLON

314

803

11:25:42

XLON

646

802.8

11:27:49

XLON

2,161

802.8

11:27:49

XLON

644

802.8

11:43:40

XLON

891

802.8

11:48:13

XLON

1,515

802.6

11:48:22

XLON

862

802.4

11:48:24

XLON

1,345

802.2

11:58:11

XLON

663

801.6

11:59:56

XLON

947

801.4

12:00:14

XLON

550

801.6

12:08:07

XLON

641

800.8

12:24:55

XLON

279

800.2

12:37:15

XLON

414

800

12:47:00

XLON

715

800.6

13:12:46

XLON

533

800.4

13:12:54

XLON

788

800.4

13:12:54

XLON

413

801.6

14:06:25

XLON

452

801.4

14:06:25

XLON

1,122

801.4

14:06:25

XLON

385

801

14:07:06

XLON

291

801

14:16:50

XLON

486

800.8

14:22:06

XLON

2,127

800.8

14:22:06

XLON

692

803

15:00:06

XLON

332

803

15:05:01

XLON

346

802.8

15:08:41

XLON

890

802.6

15:08:52

XLON

324

802

15:23:12

XLON

922

802

15:23:12

XLON

762

802.2

15:35:09

XLON

857

802.2

15:39:50

XLON

1,256

801.8

15:40:14

XLON

279

801.4

15:40:42

XLON

333

801.2

15:41:03

XLON

336

801

15:41:15

XLON

289

800.8

15:42:33

XLON

305

800.6

15:50:32

XLON

147

800.4

15:50:41

XLON

533

800.4

15:50:41

XLON

1,488

800.4

15:50:41

XLON

950

800

15:57:42

XLON

99

799.6

15:57:53

XLON

629

799.6

15:57:53

XLON

1,043

799.8

15:57:53

XLON

439

799.8

15:58:54

XLON

842

800.2

16:07:50

XLON

517

800.4

16:08:00

XLON

636

800

16:10:04

XLON

677

799.8

16:13:49

XLON

911

799.6

16:16:29

XLON

295

799.8

16:16:47

XLON

34

799.6

16:17:14

XLON

791

799.6

16:17:14

XLON

250

799.4

16:17:38

XLON

891

799.4

16:17:38

XLON

169

799.2

16:26:17

XLON

688

799.2

16:26:17

XLON

560

799

16:26:22

XLON

29

798.8

16:27:09

XLON

407

798.8

16:27:09

XLON

129

799.2

16:28:19

XLON

271

799.2

16:28:19

XLON

624

799.2

16:28:19

XLON

158

799

16:28:32

XLON

309

799

16:28:32

XLON

706

798.8

16:28:32

XLON

4

799

16:29:53

XLON

8

799

16:29:53

XLON

1,609

799

16:29:54

XLON

12

800

16:35:11

XLON

25

800

16:35:11

XLON

87

800

16:35:11

XLON

91

800

16:35:11

XLON

103

800

16:35:11

XLON

400

800

16:35:11

XLON

400

800

16:35:11

XLON

441

800

16:35:11

XLON

485

800

16:35:11

XLON

782

800

16:35:11

XLON

802

800

16:35:11

XLON

844

800

16:35:11

XLON

922

800

16:35:11

XLON

988

800

16:35:11

XLON

1,105

800

16:35:11

XLON

1,195

800

16:35:11

XLON

1,268

800

16:35:11

XLON

1,499

800

16:35:11

XLON

1,925

800

16:35:11

XLON

1,951

800

16:35:11

XLON

1,967

800

16:35:11

XLON

2,221

800

16:35:11

XLON

2,288

800

16:35:11

XLON

2,535

800

16:35:11

XLON

3,566

800

16:35:11

XLON

3,762

800

16:35:11

XLON

4,080

800

16:35:11

XLON

4,240

800

16:35:11

XLON

4,311

800

16:35:11

XLON

4,488

800

16:35:11

XLON

4,576

800

16:35:11

XLON

4,603

800

16:35:11

XLON

4,795

800

16:35:11

XLON

5,247

800

16:35:11

XLON

6,560

800

16:35:11

XLON

6,601

800

16:35:11

XLON

7,016

800

16:35:11

XLON

7,407

800

16:35:11

XLON

8,861

800

16:35:11

XLON

11,243

800

16:35:11

XLON