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 May 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:

1,543,339

1.00%

2,318,527

1.51%

(2)

Cash-settled derivatives:

1,657,295

1.08%

1,109,617

0.72%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

3,200,634

2.08%

3,428,144

2.23%

(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

180,000

52.3931 GBP

1p ordinary

Purchase

70,394

52.8212 GBP

1p ordinary

Purchase

70,000

53.2979 GBP

1p ordinary

Purchase

50,942

52.9022 GBP

1p ordinary

Purchase

47,127

53.0000 GBP

1p ordinary

Purchase

41,556

53.0404 GBP

1p ordinary

Purchase

39,072

52.9838 GBP

1p ordinary

Purchase

27,700

52.7929 GBP

1p ordinary

Purchase

20,200

53.5267 GBP

1p ordinary

Purchase

19,578

52.7904 GBP

1p ordinary

Purchase

17,917

53.0032 GBP

1p ordinary

Purchase

16,543

52.3938 GBP

1p ordinary

Purchase

14,455

52.5244 GBP

1p ordinary

Purchase

10,000

52.6707 GBP

1p ordinary

Purchase

9,501

52.6896 GBP

1p ordinary

Purchase

7,891

53.6866 GBP

1p ordinary

Purchase

7,323

52.6852 GBP

1p ordinary

Purchase

6,101

52.9852 GBP

1p ordinary

Purchase

5,246

52.2821 GBP

1p ordinary

Purchase

5,200

52.2644 GBP

1p ordinary

Purchase

4,690

53.3743 GBP

1p ordinary

Purchase

4,382

52.9892 GBP

1p ordinary

Purchase

4,336

52.4676 GBP

1p ordinary

Purchase

3,500

53.5714 GBP

1p ordinary

Purchase

2,827

52.2948 GBP

1p ordinary

Purchase

2,790

52.5592 GBP

1p ordinary

Purchase

2,683

52.7078 GBP

1p ordinary

Purchase

2,655

52.2906 GBP

1p ordinary

Purchase

2,378

53.0052 GBP

1p ordinary

Purchase

2,378

52.3762 GBP

1p ordinary

Purchase

2,374

53.3878 GBP

1p ordinary

Purchase

2,051

53.0633 GBP

1p ordinary

Purchase

1,723

53.5958 GBP

1p ordinary

Purchase

1,508

52.7145 GBP

1p ordinary

Purchase

1,490

52.3781 GBP

1p ordinary

Purchase

1,479

52.4711 GBP

1p ordinary

Purchase

1,372

52.4453 GBP

1p ordinary

Purchase

1,306

52.1881 GBP

1p ordinary

Purchase

1,302

52.1500 GBP

1p ordinary

Purchase

1,248

52.5070 GBP

1p ordinary

Purchase

1,185

52.3644 GBP

1p ordinary

Purchase

1,176

52.1977 GBP

1p ordinary

Purchase

1,154

52.2311 GBP

1p ordinary

Purchase

1,125

49.5510 GBP

1p ordinary

Purchase

1,040

52.3712 GBP

1p ordinary

Purchase

991

52.2000 GBP

1p ordinary

Purchase

974

53.0173 GBP

1p ordinary

Purchase

957

52.6919 GBP

1p ordinary

Purchase

954

53.0998 GBP

1p ordinary

Purchase

895

52.4752 GBP

1p ordinary

Purchase

780

52.5673 GBP

1p ordinary

Purchase

738

52.6394 GBP

1p ordinary

Purchase

737

52.2374 GBP

1p ordinary

Purchase

678

52.9894 GBP

1p ordinary

Purchase

678

52.5550 GBP

ADR

Purchase

660

71.9404 USD

1p ordinary

Purchase

591

52.4135 GBP

1p ordinary

Purchase

548

52.1958 GBP

1p ordinary

Purchase

540

53.1069 GBP

1p ordinary

Purchase

454

52.5145 GBP

1p ordinary

Purchase

398

52.5000 GBP

1p ordinary

Purchase

380

52.4835 GBP

1p ordinary

Purchase

363

53.1139 GBP

1p ordinary

Purchase

359

52.7834 GBP

1p ordinary

Purchase

350

52.8491 GBP

1p ordinary

Purchase

321

53.6258 GBP

1p ordinary

Purchase

302

51.9233 GBP

1p ordinary

Purchase

290

52.1831 GBP

1p ordinary

Purchase

288

52.6270 GBP

1p ordinary

Purchase

285

52.5500 GBP

1p ordinary

Purchase

283

52.3750 GBP

1p ordinary

Purchase

280

52.1748 GBP

1p ordinary

Purchase

267

52.3634 GBP

1p ordinary

Purchase

263

52.3250 GBP

1p ordinary

Purchase

214

52.7000 GBP

1p ordinary

Purchase

194

52.4750 GBP

1p ordinary

Purchase

192

53.9201 GBP

1p ordinary

Purchase

171

52.8000 GBP

1p ordinary

Purchase

168

52.2500 GBP

1p ordinary

Purchase

151

52.9036 GBP

1p ordinary

Purchase

149

52.2508 GBP

1p ordinary

Purchase

143

52.6548 GBP

1p ordinary

Purchase

137

53.6750 GBP

1p ordinary

Purchase

136

53.2375 GBP

1p ordinary

Purchase

124

52.6000 GBP

1p ordinary

Purchase

110

53.4000 GBP

1p ordinary

Purchase

103

52.6281 GBP

1p ordinary

Purchase

93

52.8672 GBP

1p ordinary

Purchase

88

52.9094 GBP

1p ordinary

Purchase

71

52.4419 GBP

1p ordinary

Purchase

65

52.4000 GBP

1p ordinary

Purchase

63

52.6500 GBP

1p ordinary

Purchase

54

52.3625 GBP

1p ordinary

Purchase

44

52.4500 GBP

1p ordinary

Purchase

38

52.9769 GBP

1p ordinary

Purchase

31

52.9000 GBP

1p ordinary

Purchase

28

53.2250 GBP

1p ordinary

Purchase

25

53.8000 GBP

ADR

Purchase

20

71.6500 USD

1p ordinary

Purchase

6

52.1817 GBP

1p ordinary

Sale

128,615

52.8109 GBP

1p ordinary

Sale

103,464

52.9369 GBP

1p ordinary

Sale

100,000

52.2738 GBP

1p ordinary

Sale

75,000

52.9735 GBP

1p ordinary

Sale

70,516

52.9904 GBP

1p ordinary

Sale

69,654

52.9920 GBP

1p ordinary

Sale

63,206

53.0000 GBP

1p ordinary

Sale

50,000

53.0747 GBP

1p ordinary

Sale

50,000

53.2233 GBP

1p ordinary

Sale

30,000

52.8130 GBP

1p ordinary

Sale

29,961

52.6093 GBP

1p ordinary

Sale

26,528

52.4004 GBP

1p ordinary

Sale

25,000

53.0484 GBP

1p ordinary

Sale

22,893

53.3215 GBP

1p ordinary

Sale

21,194

52.2488 GBP

1p ordinary

Sale

16,120

53.1949 GBP

1p ordinary

Sale

16,095

52.8877 GBP

1p ordinary

Sale

15,736

52.4644 GBP

1p ordinary

Sale

14,594

53.3545 GBP

1p ordinary

Sale

14,455

52.5245 GBP

1p ordinary

Sale

13,999

52.9814 GBP

1p ordinary

Sale

12,747

52.5250 GBP

1p ordinary

Sale

12,600

53.0517 GBP

1p ordinary

Sale

11,987

52.9679 GBP

1p ordinary

Sale

9,553

53.1931 GBP

1p ordinary

Sale

8,235

53.0506 GBP

1p ordinary

Sale

7,412

51.3836 GBP

1p ordinary

Sale

7,407

53.4732 GBP

1p ordinary

Sale

7,243

53.0248 GBP

1p ordinary

Sale

7,216

52.4719 GBP

1p ordinary

Sale

7,182

52.9996 GBP

1p ordinary

Sale

6,968

52.7413 GBP

1p ordinary

Sale

6,454

52.4407 GBP

1p ordinary

Sale

6,214

53.1175 GBP

1p ordinary

Sale

5,862

53.4660 GBP

1p ordinary

Sale

5,634

52.3329 GBP

1p ordinary

Sale

4,410

53.0175 GBP

1p ordinary

Sale

3,936

52.8738 GBP

1p ordinary

Sale

3,215

52.9316 GBP

1p ordinary

Sale

3,014

53.1905 GBP

1p ordinary

Sale

3,000

53.2406 GBP

1p ordinary

Sale

2,813

48.9970 GBP

1p ordinary

Sale

2,801

52.6960 GBP

1p ordinary

Sale

2,634

52.2250 GBP

1p ordinary

Sale

2,509

53.2240 GBP

1p ordinary

Sale

2,250

51.3700 GBP

1p ordinary

Sale

2,196

51.5158 GBP

1p ordinary

Sale

1,675

52.5000 GBP

1p ordinary

Sale

1,642

53.0639 GBP

1p ordinary

Sale

1,592

52.9595 GBP

1p ordinary

Sale

1,496

53.3813 GBP

1p ordinary

Sale

1,401

52.6939 GBP

1p ordinary

Sale

1,331

52.9894 GBP

1p ordinary

Sale

1,221

52.4263 GBP

1p ordinary

Sale

1,193

53.3255 GBP

1p ordinary

Sale

1,125

51.6060 GBP

1p ordinary

Sale

1,010

53.4275 GBP

1p ordinary

Sale

998

53.4069 GBP

1p ordinary

Sale

930

53.1350 GBP

1p ordinary

Sale

893

52.9065 GBP

1p ordinary

Sale

844

53.3590 GBP

1p ordinary

Sale

795

53.2547 GBP

1p ordinary

Sale

795

53.3347 GBP

1p ordinary

Sale

678

52.7204 GBP

1p ordinary

Sale

563

51.2690 GBP

1p ordinary

Sale

562

51.4290 GBP

1p ordinary

Sale

562

51.4720 GBP

1p ordinary

Sale

518

53.2221 GBP

1p ordinary

Sale

457

52.1588 GBP

1p ordinary

Sale

410

52.8280 GBP

ADR

Sale

361

72.1421 USD

1p ordinary

Sale

355

53.3487 GBP

1p ordinary

Sale

325

53.8500 GBP

1p ordinary

Sale

319

52.4669 GBP

ADR

Sale

299

71.6970 USD

1p ordinary

Sale

284

53.3860 GBP

1p ordinary

Sale

260

53.3490 GBP

1p ordinary

Sale

259

53.2791 GBP

1p ordinary

Sale

250

54.2000 GBP

1p ordinary

Sale

220

52.4454 GBP

1p ordinary

Sale

214

52.7000 GBP

1p ordinary

Sale

194

52.4664 GBP

1p ordinary

Sale

171

52.8000 GBP

1p ordinary

Sale

167

52.5182 GBP

1p ordinary

Sale

152

53.3750 GBP

1p ordinary

Sale

143

52.9302 GBP

1p ordinary

Sale

138

52.8132 GBP

1p ordinary

Sale

136

53.2428 GBP

1p ordinary

Sale

127

53.0251 GBP

1p ordinary

Sale

124

52.6000 GBP

1p ordinary

Sale

124

52.8895 GBP

1p ordinary

Sale

122

53.2893 GBP

1p ordinary

Sale

121

52.5880 GBP

1p ordinary

Sale

121

53.0706 GBP

1p ordinary

Sale

88

52.8716 GBP

1p ordinary

Sale

77

53.4000 GBP

1p ordinary

Sale

73

52.6750 GBP

1p ordinary

Sale

70

52.1750 GBP

1p ordinary

Sale

65

52.4000 GBP

1p ordinary

Sale

63

52.6500 GBP

1p ordinary

Sale

56

53.7500 GBP

1p ordinary

Sale

44

52.4500 GBP

1p ordinary

Sale

44

52.5500 GBP

1p ordinary

Sale

39

53.2500 GBP

1p ordinary

Sale

31

52.9000 GBP

1p ordinary

Sale

30

53.0500 GBP

1p ordinary

Sale

29

52.2000 GBP

1p ordinary

Sale

25

53.8000 GBP

ADR

Sale

20

71.6500 USD

1p ordinary

Sale

7

53.0209 GBP

1p ordinary

Sale

4

54.1750 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

Decreasing Short

100,000

52.2738 GBP

1p ordinary

SWAP

Opening Long

75,000

52.9735 GBP

1p ordinary

SWAP

Increasing Long

25,000

53.0484 GBP

1p ordinary

SWAP

Increasing Long

50,000

53.0747 GBP

1p ordinary

SWAP

Increasing Long

50,000

53.2233 GBP

1p ordinary

SWAP

Increasing Long

2,813

48.9976 GBP

1p ordinary

SWAP

Increasing Long

563

51.2697 GBP

1p ordinary

SWAP

Increasing Long

2,250

51.3705 GBP

1p ordinary

SWAP

Increasing Long

7,412

51.3836 GBP

1p ordinary

SWAP

Increasing Long

562

51.4297 GBP

1p ordinary

SWAP

Increasing Long

562

51.4723 GBP

1p ordinary

SWAP

Increasing Long

847

51.5000 GBP

1p ordinary

SWAP

Increasing Long

1,125

51.6063 GBP

1p ordinary

SWAP

Increasing Long

2,634

52.2250 GBP

1p ordinary

SWAP

Increasing Long

3,511

52.2884 GBP

1p ordinary

SWAP

Increasing Long

20,000

52.3828 GBP

1p ordinary

SWAP

Increasing Long

4,000

52.4352 GBP

1p ordinary

SWAP

Increasing Long

72

52.4494 GBP

1p ordinary

SWAP

Increasing Long

1,401

52.6939 GBP

1p ordinary

SWAP

Increasing Long

2,801

52.6960 GBP

1p ordinary

SWAP

Increasing Long

678

52.7203 GBP

1p ordinary

SWAP

Increasing Long

706

52.7276 GBP

1p ordinary

SWAP

Increasing Long

688

52.8638 GBP

1p ordinary

SWAP

Increasing Long

88

52.8715 GBP

1p ordinary

SWAP

Increasing Long

143

52.9302 GBP

1p ordinary

SWAP

Increasing Long

103,464

52.9369 GBP

1p ordinary

SWAP

Increasing Long

141

52.9695 GBP

1p ordinary

SWAP

Increasing Long

13,999

52.9814 GBP

1p ordinary

SWAP

Increasing Long

1,331

52.9894 GBP

1p ordinary

SWAP

Increasing Long

388

52.9914 GBP

1p ordinary

SWAP

Increasing Long

69,654

52.9920 GBP

1p ordinary

SWAP

Increasing Long

7,182

52.9996 GBP

1p ordinary

SWAP

Increasing Long

63,035

53.0000 GBP

1p ordinary

SWAP

Increasing Long

1,700

53.0246 GBP

1p ordinary

SWAP

Increasing Long

7,243

53.0248 GBP

1p ordinary

SWAP

Increasing Long

18,801

53.0396 GBP

1p ordinary

SWAP

Increasing Long

1,642

53.0639 GBP

1p ordinary

SWAP

Increasing Long

121

53.0706 GBP

1p ordinary

SWAP

Increasing Long

1,180

53.1021 GBP

1p ordinary

SWAP

Increasing Long

2,968

53.1539 GBP

1p ordinary

SWAP

Increasing Long

45,400

53.1752 GBP

1p ordinary

SWAP

Increasing Long

1,010

53.4275 GBP

1p ordinary

SWAP

Increasing Long

7,407

53.4732 GBP

1p ordinary

SWAP

Increasing Long

10,000

53.6735 GBP

1p ordinary

SWAP

Increasing Long

1,000

53.7996 GBP

1p ordinary

SWAP

Decreasing Long

1,125

49.5517 GBP

1p ordinary

SWAP

Decreasing Long

1,200

52.0052 GBP

1p ordinary

SWAP

Decreasing Long

149

52.2507 GBP

1p ordinary

SWAP

Decreasing Long

6,543

52.2539 GBP

1p ordinary

SWAP

Decreasing Long

2,827

52.2948 GBP

1p ordinary

SWAP

Decreasing Long

7,279

52.3565 GBP

1p ordinary

SWAP

Decreasing Long

10,000

52.4854 GBP

1p ordinary

SWAP

Decreasing Long

358

52.6542 GBP

1p ordinary

SWAP

Decreasing Long

7,323

52.6852 GBP

1p ordinary

SWAP

Decreasing Long

1,508

52.7145 GBP

1p ordinary

SWAP

Decreasing Long

359

52.7834 GBP

1p ordinary

SWAP

Decreasing Long

70,394

52.8212 GBP

1p ordinary

SWAP

Decreasing Long

54

52.8255 GBP

1p ordinary

SWAP

Decreasing Long

217

52.8353 GBP

1p ordinary

SWAP

Decreasing Long

93

52.8672 GBP

1p ordinary

SWAP

Decreasing Long

4,835

52.8997 GBP

1p ordinary

SWAP

Decreasing Long

427

52.9140 GBP

1p ordinary

SWAP

Decreasing Long

12,021

53.0000 GBP

1p ordinary

SWAP

Decreasing Long

17,917

53.0032 GBP

1p ordinary

SWAP

Decreasing Long

2,378

53.0052 GBP

1p ordinary

SWAP

Decreasing Long

19,326

53.0154 GBP

1p ordinary

SWAP

Decreasing Long

363

53.1139 GBP

1p ordinary

SWAP

Decreasing Long

2,374

53.3878 GBP

1p ordinary

SWAP

Decreasing Long

20,200

53.5267 GBP

1p ordinary

SWAP

Decreasing Long

321

53.6258 GBP

1p ordinary

SWAP

Decreasing Long

7,891

53.6866 GBP

1p ordinary

SWAP

Decreasing Long

2,366

53.6923 GBP

1p ordinary

SWAP

Decreasing Long

4,171

53.6966 GBP

1p ordinary

SWAP

Decreasing Short

1,477

52.5861 GBP

1p ordinary

CFD

Increasing Long

120

52.6034 GBP

1p ordinary

CFD

Increasing Long

6,592

52.9962 GBP

1p ordinary

CFD

Increasing Long

320

53.1563 GBP

1p ordinary

CFD

Increasing Long

107

53.2962 GBP

1p ordinary

CFD

Increasing Long

254

53.3097 GBP

1p ordinary

CFD

Decreasing Long

682

52.3377 GBP

1p ordinary

CFD

Decreasing Long

180,000

52.3931 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:

13 May 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213