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:

11 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:

1,714,350

1.11%

2,086,560

1.36%

(2)

Cash-settled derivatives:

1,415,662

0.92%

1,165,310

0.78%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

3,130,012

2.03%

3,251,870

2.14%

(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

200,432

49.8000 GBP

1p ordinary

Purchase

94,748

49.7517 GBP

1p ordinary

Purchase

49,953

49.7466 GBP

1p ordinary

Purchase

25,682

49.3654 GBP

1p ordinary

Purchase

17,571

49.8003 GBP

1p ordinary

Purchase

11,823

49.3459 GBP

1p ordinary

Purchase

10,117

49.1454 GBP

1p ordinary

Purchase

8,615

49.6226 GBP

1p ordinary

Purchase

8,519

49.9146 GBP

1p ordinary

Purchase

8,427

49.2566 GBP

1p ordinary

Purchase

7,926

49.7674 GBP

1p ordinary

Purchase

6,102

49.5378 GBP

1p ordinary

Purchase

4,912

49.8074 GBP

1p ordinary

Purchase

4,434

49.3601 GBP

1p ordinary

Purchase

3,845

49.8446 GBP

1p ordinary

Purchase

3,810

49.4481 GBP

1p ordinary

Purchase

3,604

49.8329 GBP

1p ordinary

Purchase

3,602

49.7257 GBP

1p ordinary

Purchase

3,189

49.5513 GBP

1p ordinary

Purchase

2,954

49.8021 GBP

1p ordinary

Purchase

2,500

49.8400 GBP

1p ordinary

Purchase

2,460

49.6507 GBP

1p ordinary

Purchase

2,435

49.7123 GBP

1p ordinary

Purchase

2,208

49.6220 GBP

1p ordinary

Purchase

1,527

49.7325 GBP

1p ordinary

Purchase

1,489

49.7900 GBP

1p ordinary

Purchase

1,454

49.3038 GBP

1p ordinary

Purchase

1,408

49.2673 GBP

1p ordinary

Purchase

1,125

48.5460 GBP

1p ordinary

Purchase

1,125

49.0470 GBP

1p ordinary

Purchase

1,125

48.4940 GBP

1p ordinary

Purchase

1,124

48.8470 GBP

1p ordinary

Purchase

1,055

49.3200 GBP

1p ordinary

Purchase

839

49.5421 GBP

1p ordinary

Purchase

794

49.6784 GBP

1p ordinary

Purchase

708

49.5909 GBP

1p ordinary

Purchase

694

49.8036 GBP

1p ordinary

Purchase

634

49.1670 GBP

1p ordinary

Purchase

550

49.6420 GBP

1p ordinary

Purchase

368

49.3443 GBP

ADR

Purchase

350

68.3685 USD

1p ordinary

Purchase

305

50.0112 GBP

1p ordinary

Purchase

271

49.7254 GBP

1p ordinary

Purchase

259

49.8507 GBP

1p ordinary

Purchase

238

49.8801 GBP

1p ordinary

Purchase

192

49.0218 GBP

1p ordinary

Purchase

191

49.6324 GBP

1p ordinary

Purchase

185

49.1200 GBP

1p ordinary

Purchase

118

49.8425 GBP

ADR

Purchase

100

68.5000 USD

1p ordinary

Purchase

84

49.7333 GBP

1p ordinary

Purchase

66

49.8100 GBP

1p ordinary

Purchase

64

50.0150 GBP

1p ordinary

Purchase

54

49.0600 GBP

1p ordinary

Purchase

25

49.9900 GBP

1p ordinary

Purchase

23

50.0200 GBP

ADR

Purchase

20

68.5700 USD

1p ordinary

Purchase

11

50.1250 GBP

1p ordinary

Purchase

5

50.1500 GBP

1p ordinary

Sale

141,851

49.8000 GBP

1p ordinary

Sale

21,700

49.8277 GBP

1p ordinary

Sale

11,939

49.7993 GBP

1p ordinary

Sale

10,667

49.7953 GBP

1p ordinary

Sale

10,633

49.8600 GBP

1p ordinary

Sale

10,000

49.7751 GBP

1p ordinary

Sale

8,145

49.5415 GBP

1p ordinary

Sale

7,856

49.8029 GBP

1p ordinary

Sale

7,586

49.8557 GBP

1p ordinary

Sale

6,800

49.9250 GBP

1p ordinary

Sale

6,755

49.5299 GBP

1p ordinary

Sale

6,409

48.6399 GBP

1p ordinary

Sale

5,000

49.8901 GBP

1p ordinary

Sale

4,525

49.8993 GBP

1p ordinary

Sale

3,375

46.9530 GBP

1p ordinary

Sale

3,004

49.5832 GBP

1p ordinary

Sale

2,911

49.6805 GBP

1p ordinary

Sale

2,812

46.7410 GBP

1p ordinary

Sale

2,640

49.2763 GBP

1p ordinary

Sale

2,561

49.3400 GBP

1p ordinary

Sale

2,223

49.5855 GBP

1p ordinary

Sale

2,000

49.9900 GBP

1p ordinary

Sale

1,848

49.2254 GBP

1p ordinary

Sale

1,753

49.7282 GBP

1p ordinary

Sale

1,173

49.8528 GBP

1p ordinary

Sale

1,162

49.7891 GBP

1p ordinary

Sale

1,125

48.9080 GBP

1p ordinary

Sale

943

49.8239 GBP

1p ordinary

Sale

920

49.7987 GBP

1p ordinary

Sale

804

49.3588 GBP

1p ordinary

Sale

616

49.0292 GBP

1p ordinary

Sale

571

49.4793 GBP

1p ordinary

Sale

566

49.8046 GBP

1p ordinary

Sale

563

48.7800 GBP

1p ordinary

Sale

448

49.3396 GBP

1p ordinary

Sale

362

49.8139 GBP

ADR

Sale

350

68.3685 USD

1p ordinary

Sale

283

49.5416 GBP

1p ordinary

Sale

281

49.9400 GBP

1p ordinary

Sale

269

49.4466 GBP

1p ordinary

Sale

265

49.8202 GBP

1p ordinary

Sale

235

49.1967 GBP

1p ordinary

Sale

229

50.0000 GBP

1p ordinary

Sale

200

49.1775 GBP

1p ordinary

Sale

185

49.1200 GBP

1p ordinary

Sale

152

49.5192 GBP

1p ordinary

Sale

149

49.3365 GBP

1p ordinary

Sale

138

49.5497 GBP

1p ordinary

Sale

136

49.7216 GBP

1p ordinary

Sale

135

49.8193 GBP

1p ordinary

Sale

118

49.8440 GBP

1p ordinary

Sale

110

49.9116 GBP

1p ordinary

Sale

102

49.2995 GBP

ADR

Sale

100

68.5000 USD

1p ordinary

Sale

86

49.3548 GBP

1p ordinary

Sale

76

49.7323 GBP

1p ordinary

Sale

66

49.8100 GBP

1p ordinary

Sale

65

49.8572 GBP

1p ordinary

Sale

31

49.3435 GBP

ADR

Sale

20

68.5700 USD

1p ordinary

Sale

15

50.0286 GBP

1p ordinary

Sale

6

48.9924 GBP

1p ordinary

Sale

1

49.3063 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

2,812

46.7410 GBP

1p ordinary

SWAP

Increasing Long

3,375

46.9531 GBP

1p ordinary

SWAP

Increasing Long

6,409

48.6399 GBP

1p ordinary

SWAP

Increasing Long

563

48.7802 GBP

1p ordinary

SWAP

Increasing Long

1,125

48.9089 GBP

1p ordinary

SWAP

Increasing Long

616

49.0292 GBP

1p ordinary

SWAP

Increasing Long

200

49.1775 GBP

1p ordinary

SWAP

Increasing Long

235

49.1967 GBP

1p ordinary

SWAP

Increasing Long

102

49.2995 GBP

1p ordinary

SWAP

Increasing Long

26

49.3161 GBP

1p ordinary

SWAP

Increasing Long

448

49.3396 GBP

1p ordinary

SWAP

Increasing Long

2,561

49.3400 GBP

1p ordinary

SWAP

Increasing Long

31

49.3434 GBP

1p ordinary

SWAP

Increasing Long

86

49.3548 GBP

1p ordinary

SWAP

Increasing Long

269

49.4466 GBP

1p ordinary

SWAP

Increasing Long

6,755

49.5299 GBP

1p ordinary

SWAP

Increasing Long

138

49.5497 GBP

1p ordinary

SWAP

Increasing Long

2,223

49.5855 GBP

1p ordinary

SWAP

Increasing Long

131

49.6089 GBP

1p ordinary

SWAP

Increasing Long

1,539

49.6703 GBP

1p ordinary

SWAP

Increasing Long

2,911

49.6805 GBP

1p ordinary

SWAP

Increasing Long

161

49.7727 GBP

1p ordinary

SWAP

Increasing Long

10,000

49.7751 GBP

1p ordinary

SWAP

Increasing Long

1,162

49.7891 GBP

1p ordinary

SWAP

Increasing Long

1,113

49.7900 USD

1p ordinary

SWAP

Increasing Long

10,667

49.7953 GBP

1p ordinary

SWAP

Increasing Long

1

49.7960 GBP

1p ordinary

SWAP

Increasing Long

27,542

49.8000 GBP

1p ordinary

SWAP

Increasing Long

566

49.8046 GBP

1p ordinary

SWAP

Increasing Long

21,700

49.8277 GBP

1p ordinary

SWAP

Increasing Long

5,000

49.8901 GBP

1p ordinary

SWAP

Increasing Long

6,800

49.9250 GBP

1p ordinary

SWAP

Increasing Long

229

50.0000 GBP

1p ordinary

SWAP

Decreasing Long

1,125

48.4942 GBP

1p ordinary

SWAP

Decreasing Long

1,125

48.5468 GBP

1p ordinary

SWAP

Decreasing Long

562

48.6592 GBP

1p ordinary

SWAP

Decreasing Long

562

48.8470 GBP

1p ordinary

SWAP

Decreasing Long

1,125

49.0477 GBP

1p ordinary

SWAP

Decreasing Long

10,117

49.1454 GBP

1p ordinary

SWAP

Decreasing Long

8,427

49.2566 GBP

1p ordinary

SWAP

Decreasing Long

1,408

49.2673 GBP

1p ordinary

SWAP

Decreasing Long

1,454

49.3038 GBP

1p ordinary

SWAP

Decreasing Long

25,682

49.3654 GBP

1p ordinary

SWAP

Decreasing Long

2,763

49.3966 GBP

1p ordinary

SWAP

Decreasing Long

6,467

49.6170 GBP

1p ordinary

SWAP

Decreasing Long

18,966

49.6215 GBP

1p ordinary

SWAP

Decreasing Long

2,208

49.6219 GBP

1p ordinary

SWAP

Decreasing Long

191

49.6324 GBP

1p ordinary

SWAP

Decreasing Long

794

49.6784 GBP

1p ordinary

SWAP

Decreasing Long

5,214

49.7065 GBP

1p ordinary

SWAP

Decreasing Long

2,435

49.7122 GBP

1p ordinary

SWAP

Decreasing Long

24,171

49.7854 GBP

1p ordinary

SWAP

Decreasing Long

20,433

49.7975 GBP

1p ordinary

SWAP

Decreasing Long

167,106

49.8000 GBP

1p ordinary

SWAP

Decreasing Long

17,571

49.8003 GBP

1p ordinary

SWAP

Decreasing Long

2,954

49.8021 GBP

1p ordinary

SWAP

Decreasing Long

4,912

49.8074 GBP

1p ordinary

SWAP

Decreasing Long

3,604

49.8330 GBP

1p ordinary

SWAP

Decreasing Long

3,845

49.8446 GBP

1p ordinary

SWAP

Decreasing Long

259

49.8506 GBP

1p ordinary

SWAP

Decreasing Long

92

49.8704 GBP

1p ordinary

SWAP

Decreasing Short

194

49.2081 GBP

1p ordinary

CFD

Increasing Long

2,023

49.7965 GBP

1p ordinary

CFD

Increasing Long

386

49.8175 GBP

1p ordinary

CFD

Increasing Long

110

49.9962 GBP

1p ordinary

CFD

Increasing Long

40

50.1465 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:

12 May 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213