Form 8.3 INTERTEK GROUP PLC

FORM 8.3

PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY

A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR

MORE

Rule 8.3 of the Takeover Code (the "Code")

1.

KEY INFORMATION

(a)

Full name of discloser:

Barclays PLC.

(b)

Owner or controller of interest and short

positions disclosed, if different from 1(a):

(c)

Name of offeror/offeree in relation to whose

INTERTEK GROUP PLC

relevant securities this form relates:

(d)

If an exempt fund manager connected with an

offeror/offeree, state this and specify identity of

offeror/offeree:

(e)

Date position held/dealing undertaken:

12 Jun 2026

(f)

In addition to the company in 1(c) above, is the discloser making

NO

disclosures in respect of any other party to the offer?

2.

POSITIONS OF THE PERSON MAKING THE DISCLOSURE

(a)

Interests and short positions in the relevant securities of the offeror or offeree

to which the disclosure relates following the dealing(if any)

Class of relevant security:

1p ordinary

Interests

Short Positions

Number

(%)

Number

(%)

(1)

Relevant securities owned

and/or controlled:

2,689,871

1.75%

3,588,520

2.33%

(2)

Cash-settled derivatives:

2,925,490

1.90%

2,363,909

1.54%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

5,615,361

3.65%

5,952,429

3.87%

(b)

Rights to subscribe for new securities (including directors and other executive

options)

Class of relevant security in relation to

which subscription right exists

Details, including nature of the rights

concerned and relevant percentages:

3.

DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE

(a)

Purchases and sales

Class of relevant

Purchase/sale

Number of

Price per unit

security

securities

1p ordinary

Purchase

82,538

56.6019 GBP

1p ordinary

Purchase

73,717

57.0342 GBP

1p ordinary

Purchase

63,349

56.6000 GBP

1p ordinary

Purchase

30,510

57.0330 GBP

1p ordinary

Purchase

26,818

56.0096 GBP

1p ordinary

Purchase

17,552

57.1089 GBP

1p ordinary

Purchase

17,317

56.5925 GBP

1p ordinary

Purchase

13,536

55.7000 GBP

1p ordinary

Purchase

12,817

57.2500 GBP

1p ordinary

Purchase

11,182

56.1553 GBP

1p ordinary

Purchase

10,397

57.2111 GBP

1p ordinary

Purchase

9,001

56.2890 GBP

1p ordinary

Purchase

6,683

56.7177 GBP

1p ordinary

Purchase

6,072

56.8222 GBP

1p ordinary

Purchase

5,834

55.8756 GBP

1p ordinary

Purchase

5,500

57.4038 GBP

1p ordinary

Purchase

4,790

56.5999 GBP

1p ordinary

Purchase

4,312

56.5968 GBP

1p ordinary

Purchase

3,913

57.1827 GBP

1p ordinary

Purchase

3,791

55.9275 GBP

1p ordinary

Purchase

2,750

57.3045 GBP

1p ordinary

Purchase

2,706

56.5886 GBP

1p ordinary

Purchase

2,625

56.7292 GBP

1p ordinary

Purchase

2,422

57.1586 GBP

1p ordinary

Purchase

1,706

56.3300 GBP

1p ordinary

Purchase

1,688

55.5820 GBP

1p ordinary

Purchase

1,677

57.0800 GBP

1p ordinary

Purchase

1,445

55.8494 GBP

1p ordinary

Purchase

1,443

56.7899 GBP

1p ordinary

Purchase

1,152

55.9492 GBP

1p ordinary

Purchase

853

57.1300 GBP

1p ordinary

Purchase

758

57.0769 GBP

1p ordinary

Purchase

638

56.8757 GBP

1p ordinary

Purchase

606

57.1057 GBP

1p ordinary

Purchase

603

56.8643 GBP

1p ordinary

Purchase

543

57.0518 GBP

1p ordinary

Purchase

531

56.7509 GBP

1p ordinary

Purchase

519

57.1189 GBP

1p ordinary

Purchase

472

56.0835 GBP

1p ordinary

Purchase

434

56.1225 GBP

1p ordinary

Purchase

411

56.9182 GBP

1p ordinary

Purchase

406

56.8045 GBP

1p ordinary

Purchase

381

55.9000 GBP

1p ordinary

Purchase

360

57.2057 GBP

1p ordinary

Purchase

351

57.2083 GBP

1p ordinary

Purchase

334

56.1021 GBP

ADR

Purchase

300

75.9200 USD

ADR

Purchase

300

76.7666 USD

1p ordinary

Purchase

266

56.1000 GBP

1p ordinary

Purchase

241

56.4514 GBP

1p ordinary

Purchase

232

57.2482 GBP

1p ordinary

Purchase

202

56.6010 GBP

1p ordinary

Purchase

163

55.8250 GBP

1p ordinary

Purchase

141

55.7378 GBP

1p ordinary

Purchase

107

56.9000 GBP

1p ordinary

Purchase

100

55.8500 GBP

1p ordinary

Purchase

89

57.1735 GBP

1p ordinary

Purchase

87

55.7500 GBP

1p ordinary

Purchase

66

57.0000 GBP

1p ordinary

Purchase

24

57.2791 GBP

1p ordinary

Purchase

22

56.0750 GBP

1p ordinary

Purchase

19

56.0500 GBP

1p ordinary

Purchase

18

56.1750 GBP

1p ordinary

Sale

185,000

56.7720 GBP

1p ordinary

Sale

168,380

56.6000 GBP

1p ordinary

Sale

81,153

56.7286 GBP

1p ordinary

Sale

71,839

56.6320 GBP

1p ordinary

Sale

50,000

57.0714 GBP

1p ordinary

Sale

45,244

56.9976 GBP

1p ordinary

Sale

30,900

56.4880 GBP

1p ordinary

Sale

25,000

57.2036 GBP

1p ordinary

Sale

8,126

56.7621 GBP

1p ordinary

Sale

7,378

56.7719 GBP

1p ordinary

Sale

7,115

56.6392 GBP

1p ordinary

Sale

6,426

55.7750 GBP

1p ordinary

Sale

5,924

57.1427 GBP

1p ordinary

Sale

5,869

55.8750 GBP

1p ordinary

Sale

5,656

56.6421 GBP

1p ordinary

Sale

4,806

57.1086 GBP

1p ordinary

Sale

4,524

55.8000 GBP

1p ordinary

Sale

3,073

56.5860 GBP

1p ordinary

Sale

2,750

57.3045 GBP

1p ordinary

Sale

2,660

57.0004 GBP

1p ordinary

Sale

2,589

56.6424 GBP

1p ordinary

Sale

2,230

56.0000 GBP

1p ordinary

Sale

2,129

56.4747 GBP

1p ordinary

Sale

1,493

56.3715 GBP

1p ordinary

Sale

1,470

56.8654 GBP

1p ordinary

Sale

1,200

55.8608 GBP

1p ordinary

Sale

1,126

56.1880 GBP

1p ordinary

Sale

563

56.2380 GBP

1p ordinary

Sale

563

56.1380 GBP

1p ordinary

Sale

562

56.6570 GBP

1p ordinary

Sale

532

56.1000 GBP

1p ordinary

Sale

518

56.2740 GBP

1p ordinary

Sale

514

55.9250 GBP

1p ordinary

Sale

484

56.3612 GBP

1p ordinary

Sale

479

55.9839 GBP

1p ordinary

Sale

416

57.0000 GBP

1p ordinary

Sale

325

56.0428 GBP

ADR

Sale

300

76.7666 USD

1p ordinary

Sale

300

56.1953 GBP

ADR

Sale

300

75.9200 USD

1p ordinary

Sale

232

57.2500 GBP

1p ordinary

Sale

231

55.9522 GBP

1p ordinary

Sale

220

56.4295 GBP

1p ordinary

Sale

219

56.7652 GBP

1p ordinary

Sale

170

56.2073 GBP

1p ordinary

Sale

168

55.8250 GBP

1p ordinary

Sale

147

56.7074 GBP

1p ordinary

Sale

109

56.0750 GBP

1p ordinary

Sale

100

55.8500 GBP

1p ordinary

Sale

87

55.7500 GBP

1p ordinary

Sale

70

55.9978 GBP

1p ordinary

Sale

68

55.9750 GBP

1p ordinary

Sale

55

55.9086 GBP

1p ordinary

Sale

43

56.7472 GBP

1p ordinary

Sale

19

56.0500 GBP

1p ordinary

Sale

18

56.1750 GBP

1p ordinary

Sale

14

56.7785 GBP

1p ordinary

Sale

11

56.0443 GBP

1p ordinary

Sale

11

57.0918 GBP

1p ordinary

Sale

10

56.5500 GBP

1p ordinary

Sale

9

56.5911 GBP

1p ordinary

Sale

7

56.5914 GBP

1p ordinary

Sale

4

56.0222 GBP

1p ordinary

Sale

3

56.4000 GBP

1p ordinary

Sale

2

57.0200 GBP

1p ordinary

Sale

1

56.2000 GBP

1p ordinary

Sale

1

56.0250 GBP

1p ordinary

Sale

1

56.5900 GBP

(b)

Cash-settled derivative transactions

Class of

Product

Nature of dealing

Number of

Price per

relevant

description

reference

unit

security

securities

1p ordinary

SWAP

Increasing Long

30,900

56.4880 GBP

1p ordinary

SWAP

Increasing Long

1,003

56.3715 GBP

1p ordinary

SWAP

Increasing Long

15

56.3612 GBP

1p ordinary

SWAP

Increasing Long

55

55.9086 GBP

1p ordinary

SWAP

Decreasing Short

32

55.7994 GBP

1p ordinary

SWAP

Increasing Long

5,476

56.6000 GBP

1p ordinary

SWAP

Decreasing Long

4

56.6008 GBP

1p ordinary

SWAP

Increasing Long

54,981

56.6000 GBP

1p ordinary

SWAP

Increasing Short

401

57.1655 GBP

1p ordinary

SWAP

Increasing Short

3

56.0250 GBP

1p ordinary

SWAP

Increasing Long

43

56.7471 GBP

1p ordinary

SWAP

Decreasing Short

3

56.0250 GBP

1p ordinary

SWAP

Increasing Long

2,420

55.8000 GBP

1p ordinary

SWAP

Decreasing Short

563

56.2387 GBP

1p ordinary

SWAP

Increasing Long

2,104

55.8000 GBP

1p ordinary

CFD

Decreasing Short

6,426

55.7750 GBP

1p ordinary

CFD

Decreasing Short

2,017

56.0949 GBP

1p ordinary

CFD

Increasing Long

223

56.8026 GBP

1p ordinary

CFD

Closing Short

490

56.5960 GBP

1p ordinary

CFD

Opening Long

4,391

56.5960 GBP

1p ordinary

CFD

Increasing Long

1,392

56.5136 GBP

1p ordinary

CFD

Decreasing Long

738

56.1966 GBP

1p ordinary

CFD

Increasing Long

4,131

56.5575 GBP

1p ordinary

SWAP

Decreasing Short

168

55.8955 GBP

1p ordinary

SWAP

Increasing Short

5,763

55.8756 GBP

1p ordinary

SWAP

Increasing Short

50,000

57.2557 GBP

1p ordinary

SWAP

Increasing Short

71

55.8756 GBP

1p ordinary

SWAP

Decreasing Short

350

56.9943 GBP

1p ordinary

SWAP

Decreasing Long

3,791

55.9275 GBP

1p ordinary

SWAP

Decreasing Short

125

57.1750 GBP

1p ordinary

SWAP

Increasing Long

11

56.3612 GBP

1p ordinary

SWAP

Increasing Long

400

56.3612 GBP

1p ordinary

SWAP

Increasing Long

57

56.3612 GBP

1p ordinary

SWAP

Increasing Long

1

56.3612 GBP

1p ordinary

SWAP

Increasing Short

5,500

57.4038 GBP

1p ordinary

SWAP

Increasing Long

6,834

56.6392 GBP

1p ordinary

SWAP

Increasing Long

4,141

56.6421 GBP

1p ordinary

SWAP

Decreasing Short

1,466

56.5886 USD

1p ordinary

SWAP

Increasing Long

289

56.3715 GBP

1p ordinary

SWAP

Increasing Long

1

56.5900 GBP

1p ordinary

SWAP

Opening Long

7

56.5914 GBP

1p ordinary

SWAP

Increasing Short

4,312

56.5968 GBP

1p ordinary

SWAP

Opening Long

9

56.5911 GBP

1p ordinary

SWAP

Decreasing Short

281

56.6392 GBP

1p ordinary

SWAP

Increasing Long

201

56.3715 GBP

1p ordinary

SWAP

Closing Short

23,430

57.0714 GBP

1p ordinary

SWAP

Closing Short

25,000

57.0714 GBP

1p ordinary

SWAP

Increasing Short

14,567

56.6575 GBP

1p ordinary

SWAP

Increasing Short

229

56.6575 GBP

1p ordinary

SWAP

Decreasing Short

1,570

57.0714 GBP

1p ordinary

SWAP

Opening Short

26,818

56.0096 GBP

1p ordinary

SWAP

Increasing Long

286

55.9840 GBP

1p ordinary

SWAP

Increasing Short

162

57.0505 GBP

1p ordinary

SWAP

Increasing Short

275

57.1750 GBP

1p ordinary

SWAP

Increasing Long

2

57.0192 GBP

1p ordinary

SWAP

Decreasing Short

150

57.1750 GBP

1p ordinary

SWAP

Increasing Long

315

55.7000 GBP

1p ordinary

SWAP

Increasing Short

1,688

55.5824 GBP

1p ordinary

SWAP

Increasing Long

24

56.5520 GBP

1p ordinary

CFD

Decreasing Short

2,318

55.8750 GBP

1p ordinary

CFD

Increasing Long

76

56.7013 GBP

1p ordinary

SWAP

Increasing Short

6,257

56.1553 GBP

1p ordinary

SWAP

Decreasing Short

50,000

57.0305 GBP

1p ordinary

SWAP

Increasing Short

77

56.1553 GBP

1p ordinary

SWAP

Closing Long

141

55.7378 GBP

1p ordinary

SWAP

Increasing Long

83

55.9840 GBP

1p ordinary

SWAP

Increasing Long

1,515

56.6421 GBP

1p ordinary

SWAP

Increasing Short

2,625

56.7292 GBP

1p ordinary

SWAP

Increasing Long

110

55.9840 GBP

1p ordinary

SWAP

Increasing Short

29,153

57.0342 GBP

1p ordinary

SWAP

Increasing Short

459

57.0342 GBP

1p ordinary

SWAP

Increasing Short

235

57.1138 GBP

1p ordinary

SWAP

Increasing Short

202

56.6010 GBP

1p ordinary

SWAP

Increasing Long

231

55.9522 GBP

1p ordinary

SWAP

Increasing Long

1,200

55.8608 GBP

1p ordinary

SWAP

Decreasing Short

563

56.1887 GBP

1p ordinary

SWAP

Increasing Long

1,127

56.6309 GBP

1p ordinary

CFD

Decreasing Short

3,551

55.8750 GBP

1p ordinary

CFD

Decreasing Long

87

57.1689 GBP

1p ordinary

SWAP

Increasing Short

4,789

56.1553 GBP

1p ordinary

SWAP

Decreasing Short

25,000

57.0088 GBP

1p ordinary

SWAP

Increasing Short

59

56.1553 GBP

1p ordinary

SWAP

Increasing Short

43,063

57.0342 GBP

1p ordinary

SWAP

Increasing Short

798

57.0341 GBP

1p ordinary

SWAP

Increasing Short

6,072

56.8222 GBP

1p ordinary

SWAP

Increasing Long

14

56.7788 GBP

1p ordinary

SWAP

Decreasing Long

12,324

56.5680 GBP

1p ordinary

SWAP

Decreasing Short

563

56.1887 GBP

1p ordinary

SWAP

Decreasing Long

257

56.6000 GBP

1p ordinary

CFD

Decreasing Long

212

57.2087 GBP

1p ordinary

SWAP

Increasing Short

7,516

57.1089 GBP

1p ordinary

SWAP

Decreasing Short

60,000

56.1895 GBP

1p ordinary

SWAP

Increasing Short

121

57.1089 GBP

1p ordinary

SWAP

Increasing Short

360

57.2057 GBP

1p ordinary

SWAP

Increasing Long

11

57.0925 GBP

1p ordinary

SWAP

Decreasing Long

1,152

55.9492 GBP

1p ordinary

SWAP

Increasing Short

9,001

56.2893 GBP

1p ordinary

SWAP

Increasing Long

18,115

56.6000 GBP

1p ordinary

SWAP

Increasing Short

9,821

57.1089 GBP

1p ordinary

SWAP

Decreasing Short

50,000

57.0941 GBP

1p ordinary

SWAP

Increasing Short

94

57.1089 GBP

1p ordinary

SWAP

Increasing Short

1,515

57.0832 GBP

1p ordinary

SWAP

Increasing Long

4

56.0222 GBP

1p ordinary

SWAP

Increasing Long

8

56.4875 GBP

1p ordinary

SWAP

Decreasing Short

563

56.1387 GBP

1p ordinary

SWAP

Increasing Long

7,378

56.7719 GBP

1p ordinary

SWAP

Decreasing Short

25,000

57.2036 GBP

1p ordinary

SWAP

Increasing Short

142

56.7306 GBP

1p ordinary

SWAP

Increasing Long

11

56.0443 GBP

1p ordinary

SWAP

Increasing Long

5,758

56.9692 GBP

1p ordinary

SWAP

Increasing Long

4,806

57.1086 GBP

1p ordinary

SWAP

Increasing Short

523

57.0603 GBP

1p ordinary

SWAP

Decreasing Long

11

56.6000 GBP

1p ordinary

SWAP

Decreasing Long

853

57.1300 GBP

1p ordinary

SWAP

Increasing Short

606

57.1057 GBP

1p ordinary

SWAP

Decreasing Long

2,908

56.6000 GBP

1p ordinary

SWAP

Increasing Long

45,244

56.9976 GBP

1p ordinary

SWAP

Increasing Long

8,294

56.7431 GBP

1p ordinary

SWAP

Increasing Long

2,589

56.6424 GBP

1p ordinary

SWAP

Decreasing Long

853

56.7207 GBP

1p ordinary

SWAP

Increasing Long

81,153

56.7286 GBP

1p ordinary

SWAP

Decreasing Long

6,683

56.7177 GBP

(c)

Stock-settled derivative transactions (including options)

(i)

Writing, selling, purchasing or varying

Class

Product

Writing,

Number

Exercise

Type

Expiry

Option

of

description

purchasing,

of

price

date

money

relevant

selling,

securities

per unit

paid/

security

varying etc

to which

received

option

per unit

relates

(ii)

Exercise

Class of relevant

Product description

Exercising/ exercised against

Number of

Exercise price per

security

securities

unit

(d)

Other dealings (including subscribing for new securities)

Class of relevant

Nature of Dealings

Details

Price per unit (if

security

applicable)

4.

OTHER INFORMATION

(a)

Indemnity and other dealings arrangements

Details of any indemnity or option arrangement, or any agreement or understanding,

formal or informal, relating to relevant securities which may be an inducement to deal

or refrain from dealing entered into by the exempt principal trader making the disclosure and any party

to the offer or any person acting in concert with a party to the offer:

NONE

(b)

Agreements, arrangements or understandings relating to options or derivatives

Details of any agreement, arrangement or understanding, formal or informal, between

the person making the disclosure and any other person relating to:

(i) the voting rights of any relevant securities under any option; or

(ii) the voting rights of future acquisition or disposal of any relevant securities to which

any derivative is referenced:

NONE

(c)

Attachments

Is a Supplemental Form 8 (Open Positions) attached?

NO

Date of disclosure:

15 Jun 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213