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:

10 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:

2,769,525

1.80%

2,969,348

1.93%

(2)

Cash-settled derivatives:

2,280,223

1.48%

2,430,650

1.58%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

5,049,748

3.28%

5,399,998

3.51%

(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

140,171

54.6500 GBP

1p ordinary

Purchase

60,000

54.8235 GBP

1p ordinary

Purchase

55,669

55.3000 GBP

1p ordinary

Purchase

26,398

54.6596 GBP

1p ordinary

Purchase

25,000

55.1770 GBP

1p ordinary

Purchase

19,840

54.8981 GBP

1p ordinary

Purchase

13,559

54.8555 GBP

1p ordinary

Purchase

11,963

54.9536 GBP

1p ordinary

Purchase

6,113

55.0909 GBP

1p ordinary

Purchase

1,593

55.0294 GBP

1p ordinary

Purchase

1,347

54.7712 GBP

1p ordinary

Purchase

1,238

55.0750 GBP

1p ordinary

Purchase

1,131

54.6764 GBP

1p ordinary

Purchase

1,116

55.5995 GBP

1p ordinary

Purchase

1,107

55.0806 GBP

1p ordinary

Purchase

1,074

54.7474 GBP

1p ordinary

Purchase

1,061

54.9889 GBP

1p ordinary

Purchase

887

54.9759 GBP

1p ordinary

Purchase

859

55.0755 GBP

1p ordinary

Purchase

748

54.9357 GBP

1p ordinary

Purchase

665

55.0301 GBP

1p ordinary

Purchase

660

55.0888 GBP

1p ordinary

Purchase

587

55.2747 GBP

1p ordinary

Purchase

572

55.0872 GBP

1p ordinary

Purchase

528

54.9479 GBP

1p ordinary

Purchase

360

55.1175 GBP

1p ordinary

Purchase

309

55.1137 GBP

1p ordinary

Purchase

303

55.2501 GBP

1p ordinary

Purchase

301

54.8008 GBP

1p ordinary

Purchase

184

55.5000 GBP

1p ordinary

Purchase

140

55.0000 GBP

1p ordinary

Purchase

133

55.0091 GBP

1p ordinary

Purchase

126

54.8250 GBP

1p ordinary

Purchase

96

54.8500 GBP

1p ordinary

Purchase

10

55.0059 GBP

1p ordinary

Purchase

66

55.1966 GBP

1p ordinary

Purchase

21

54.9000 GBP

1p ordinary

Purchase

20

55.2835 GBP

1p ordinary

Purchase

18

55.1500 GBP

1p ordinary

Purchase

4

54.8750 GBP

ADR

Purchase

3

73.5600 USD

1p ordinary

Purchase

1

55.2500 GBP

1p ordinary

Sale

201,333

54.6500 GBP

1p ordinary

Sale

58,321

54.8255 GBP

1p ordinary

Sale

36,785

54.9401 GBP

1p ordinary

Sale

25,000

55.7109 GBP

1p ordinary

Sale

25,000

55.5746 GBP

1p ordinary

Sale

10,329

54.9615 GBP

1p ordinary

Sale

10,084

54.6947 GBP

1p ordinary

Sale

8,600

54.8246 GBP

1p ordinary

Sale

7,225

54.9519 GBP

1p ordinary

Sale

5,953

54.6778 GBP

1p ordinary

Sale

5,250

54.8508 GBP

1p ordinary

Sale

4,690

55.3251 GBP

1p ordinary

Sale

4,044

54.8952 GBP

1p ordinary

Sale

3,655

54.7631 GBP

1p ordinary

Sale

3,585

54.8735 GBP

1p ordinary

Sale

3,061

55.0224 GBP

1p ordinary

Sale

2,464

54.9897 GBP

1p ordinary

Sale

2,328

55.0082 GBP

1p ordinary

Sale

2,325

54.7637 GBP

1p ordinary

Sale

2,086

54.9756 GBP

1p ordinary

Sale

1,943

54.6489 GBP

1p ordinary

Sale

1,835

54.7270 GBP

1p ordinary

Sale

1,772

54.6920 GBP

1p ordinary

Sale

1,713

54.9750 GBP

1p ordinary

Sale

1,560

55.4333 GBP

1p ordinary

Sale

1,099

54.9287 GBP

1p ordinary

Sale

1,091

54.9765 GBP

1p ordinary

Sale

1,042

55.1090 GBP

1p ordinary

Sale

945

55.3458 GBP

1p ordinary

Sale

918

55.0253 GBP

1p ordinary

Sale

904

55.1198 GBP

1p ordinary

Sale

773

54.7879 GBP

1p ordinary

Sale

697

54.7699 GBP

1p ordinary

Sale

681

55.0251 GBP

1p ordinary

Sale

655

55.0761 GBP

1p ordinary

Sale

519

55.1605 GBP

1p ordinary

Sale

467

55.2271 GBP

1p ordinary

Sale

422

55.0233 GBP

1p ordinary

Sale

411

54.9080 GBP

1p ordinary

Sale

356

54.8174 GBP

1p ordinary

Sale

334

54.7523 GBP

1p ordinary

Sale

269

55.0595 GBP

1p ordinary

Sale

263

54.9768 GBP

1p ordinary

Sale

260

55.0791 GBP

1p ordinary

Sale

194

54.9703 GBP

1p ordinary

Sale

164

55.1000 GBP

1p ordinary

Sale

162

54.9445 GBP

1p ordinary

Sale

153

55.1800 GBP

1p ordinary

Sale

145

55.1363 GBP

1p ordinary

Sale

138

54.9985 GBP

1p ordinary

Sale

129

54.9337 GBP

1p ordinary

Sale

120

54.8500 GBP

1p ordinary

Sale

110

54.7195 GBP

1p ordinary

Sale

107

55.1514 GBP

1p ordinary

Sale

92

55.3250 GBP

1p ordinary

Sale

92

55.3500 GBP

1p ordinary

Sale

84

54.8869 GBP

1p ordinary

Sale

81

55.1599 GBP

1p ordinary

Sale

77

55.0750 GBP

1p ordinary

Sale

67

54.9000 GBP

1p ordinary

Sale

54

54.8739 GBP

1p ordinary

Sale

31

54.9250 GBP

1p ordinary

Sale

14

55.2977 GBP

1p ordinary

Sale

6

54.9767 GBP

1p ordinary

Sale

3

54.8425 GBP

ADR

Sale

3

73.5600 USD

1p ordinary

Sale

2

54.7500 GBP

1p ordinary

Sale

1

54.8000 GBP

1p ordinary

Sale

1

54.9500 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

8,600

54.8246 GBP

1p ordinary

SWAP

Increasing Long

324

54.9765 GBP

1p ordinary

SWAP

Increasing Long

31

54.7879 GBP

1p ordinary

SWAP

Increasing Short

528

54.9479 GBP

1p ordinary

SWAP

Closing Short

21

55.1224 GBP

1p ordinary

SWAP

Opening Long

53

55.1224 GBP

1p ordinary

SWAP

Decreasing Long

4

54.8758 GBP

1p ordinary

SWAP

Decreasing Short

7

54.9771 GBP

1p ordinary

SWAP

Increasing Long

62,830

54.6500 GBP

1p ordinary

SWAP

Decreasing Short

6

54.9767 GBP

1p ordinary

SWAP

Increasing Long

96

55.3000 GBP

1p ordinary

SWAP

Increasing Long

4,058

55.5472 GBP

1p ordinary

SWAP

Increasing Long

160

54.6546 GBP

1p ordinary

CFD

Decreasing Short

1,681

54.9750 GBP

1p ordinary

CFD

Decreasing Short

137

54.9450 GBP

1p ordinary

CFD

Closing Long

1,919

54.6538 GBP

1p ordinary

CFD

Opening Short

936

54.6538 GBP

1p ordinary

CFD

Increasing Long

552

55.1313 GBP

1p ordinary

CFD

Increasing Long

1,842

54.8508 GBP

1p ordinary

CFD

Increasing Long

1,494

54.8508 GBP

1p ordinary

CFD

Increasing Long

1,019

54.8508 GBP

1p ordinary

CFD

Increasing Long

3,066

55.0428 GBP

1p ordinary

CFD

Increasing Long

895

54.8508 GBP

1p ordinary

SWAP

Increasing Short

95

55.5995 GBP

1p ordinary

SWAP

Decreasing Short

10,329

54.9614 GBP

1p ordinary

SWAP

Increasing Short

13

55.5995 GBP

1p ordinary

SWAP

Decreasing Short

980

54.6919 GBP

1p ordinary

SWAP

Increasing Long

86

54.7879 GBP

1p ordinary

SWAP

Increasing Long

608

54.7879 GBP

1p ordinary

SWAP

Increasing Long

25

54.7879 GBP

1p ordinary

SWAP

Increasing Long

17

54.7879 GBP

1p ordinary

SWAP

Increasing Long

6

54.7879 GBP

1p ordinary

SWAP

Increasing Long

7,211

54.6946 GBP

1p ordinary

SWAP

Decreasing Short

945

55.3458 GBP

1p ordinary

SWAP

Increasing Long

2,551

54.6946 GBP

1p ordinary

SWAP

Decreasing Short

5,007

54.6390 USD

1p ordinary

SWAP

Increasing Long

95

54.9765 GBP

1p ordinary

SWAP

Increasing Long

322

54.6946 GBP

1p ordinary

SWAP

Increasing Short

2,540

54.8495 GBP

1p ordinary

SWAP

Decreasing Short

639

54.6919 GBP

1p ordinary

SWAP

Decreasing Short

153

54.6919 GBP

1p ordinary

SWAP

Increasing Long

672

54.9765 GBP

1p ordinary

SWAP

Decreasing Short

16,226

55.6428 GBP

1p ordinary

SWAP

Decreasing Short

33,774

55.6428 GBP

1p ordinary

SWAP

Increasing Long

687

54.7637 GBP

1p ordinary

SWAP

Closing Long

53

54.6500 GBP

1p ordinary

SWAP

Increasing Long

361

54.6500 GBP

1p ordinary

SWAP

Decreasing Short

14

55.2977 GBP

1p ordinary

SWAP

Decreasing Short

334

54.7523 GBP

1p ordinary

SWAP

Increasing Long

3,809

55.0049 GBP

1p ordinary

SWAP

Increasing Long

29,149

54.9504 GBP

1p ordinary

SWAP

Decreasing Long

422

54.6500 GBP

1p ordinary

CFD

Decreasing Short

5,254

54.9481 GBP

1p ordinary

CFD

Decreasing Long

729

54.8479 GBP

1p ordinary

SWAP

Increasing Short

1,006

55.5995 GBP

1p ordinary

SWAP

Increasing Short

20,000

55.0385 GBP

1p ordinary

SWAP

Increasing Short

2

55.5995 GBP

1p ordinary

SWAP

Increasing Long

202

54.7637 GBP

1p ordinary

SWAP

Decreasing Short

1,835

54.7270 GBP

1p ordinary

SWAP

Increasing Long

1,436

54.7637 GBP

1p ordinary

SWAP

Decreasing Short

269

55.0595 GBP

1p ordinary

SWAP

Decreasing Short

162

54.9445 GBP

1p ordinary

SWAP

Increasing Long

104

55.3509 GBP

1p ordinary

SWAP

Decreasing Long

5,178

54.6714 GBP

1p ordinary

SWAP

Increasing Long

24,690

54.6500 GBP

1p ordinary

SWAP

Increasing Short

3

55.2835 GBP

1p ordinary

SWAP

Increasing Short

20,000

54.7327 GBP

1p ordinary

SWAP

Increasing Short

250

54.8981 GBP

1p ordinary

SWAP

Increasing Short

1

55.2511 GBP

1p ordinary

SWAP

Increasing Short

92

54.6500 GBP

1p ordinary

SWAP

Decreasing Short

4,044

54.8952 GBP

1p ordinary

SWAP

Increasing Long

1,628

54.8366 GBP

1p ordinary

SWAP

Closing Long

36,752

54.6738 GBP

1p ordinary

SWAP

Opening Short

37,277

54.6738 GBP

1p ordinary

SWAP

Decreasing Long

46,716

55.3000 GBP

1p ordinary

SWAP

Increasing Short

17

55.2835 GBP

1p ordinary

SWAP

Increasing Short

20,000

54.6992 GBP

1p ordinary

SWAP

Decreasing Short

3,655

54.7631 GBP

1p ordinary

SWAP

Decreasing Short

697

54.7699 GBP

1p ordinary

SWAP

Increasing Long

681

55.0251 GBP

1p ordinary

SWAP

Decreasing Short

23,547

54.6500 GBP

1p ordinary

SWAP

Increasing Long

2,328

55.0081 GBP

1p ordinary

SWAP

Increasing Short

19,590

54.8981 GBP

1p ordinary

SWAP

Decreasing Short

110

54.7195 GBP

1p ordinary

SWAP

Decreasing Long

859

55.0755 GBP

1p ordinary

SWAP

Decreasing Short

3,366

54.6500 GBP

1p ordinary

SWAP

Increasing Long

2,464

54.9897 GBP

1p ordinary

SWAP

Decreasing Short

356

54.8174 GBP

1p ordinary

SWAP

Decreasing Long

7

54.6500 GBP

1p ordinary

SWAP

Decreasing Short

4,270

54.6500 GBP

1p ordinary

SWAP

Increasing Long

7,225

54.9519 GBP

1p ordinary

SWAP

Decreasing Short

1,943

54.6489 GBP

1p ordinary

SWAP

Decreasing Long

12,732

54.7400 GBP

1p ordinary

SWAP

Closing Short

6,094

54.6500 GBP

1p ordinary

SWAP

Opening Long

19,332

54.6500 GBP

1p ordinary

SWAP

Decreasing Long

1,074

54.7473 GBP

1p ordinary

SWAP

Decreasing Short

467

55.2271 GBP

1p ordinary

SWAP

Decreasing Long

8,049

54.6500 GBP

1p ordinary

SWAP

Decreasing Long

96

54.8500 GBP

1p ordinary

SWAP

Decreasing Long

8,953

55.3000 GBP

1p ordinary

SWAP

Decreasing Long

13,559

54.8555 GBP

1p ordinary

SWAP

Increasing Long

996

55.1410 GBP

1p ordinary

SWAP

Decreasing Long

25,000

55.1775 GBP

1p ordinary

SWAP

Increasing Long

655

55.0761 GBP

1p ordinary

SWAP

Increasing Long

36,785

54.9401 GBP

1p ordinary

SWAP

Decreasing Long

1,531

54.8587 GBP

1p ordinary

SWAP

Decreasing Long

660

55.0888 GBP

1p ordinary

SWAP

Decreasing Long

11,963

54.9536 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:

11 Jun 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213