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:

28 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:

2,757,937

1.79%

2,620,998

1.70%

(2)

Cash-settled derivatives:

2,167,142

1.41%

2,378,497

1.55%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

4,925,079

3.20%

4,999,495

3.25%

(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

108,405

53.8000 GBP

1p ordinary

Purchase

43,373

53.8104 GBP

1p ordinary

Purchase

36,014

53.8071 GBP

1p ordinary

Purchase

29,958

53.8696 GBP

1p ordinary

Purchase

5,809

53.8479 GBP

1p ordinary

Purchase

5,676

53.7500 GBP

1p ordinary

Purchase

5,195

53.8989 GBP

1p ordinary

Purchase

4,299

53.9161 GBP

1p ordinary

Purchase

4,066

53.8603 GBP

1p ordinary

Purchase

3,603

53.8607 GBP

1p ordinary

Purchase

3,535

53.7573 GBP

1p ordinary

Purchase

2,500

53.9942 GBP

1p ordinary

Purchase

1,908

53.9300 GBP

1p ordinary

Purchase

1,676

53.8829 GBP

1p ordinary

Purchase

1,567

53.8352 GBP

1p ordinary

Purchase

1,262

53.8217 GBP

1p ordinary

Purchase

1,208

53.9886 GBP

1p ordinary

Purchase

1,091

53.8990 GBP

1p ordinary

Purchase

1,015

53.9466 GBP

1p ordinary

Purchase

974

53.8277 GBP

1p ordinary

Purchase

958

53.8936 GBP

1p ordinary

Purchase

864

53.8250 GBP

1p ordinary

Purchase

792

53.8466 GBP

ADR

Purchase

742

73.6684 USD

1p ordinary

Purchase

724

53.8811 GBP

1p ordinary

Purchase

711

53.9686 GBP

1p ordinary

Purchase

537

53.9234 GBP

ADR

Purchase

500

74.0180 USD

1p ordinary

Purchase

466

53.7822 GBP

1p ordinary

Purchase

421

53.7615 GBP

1p ordinary

Purchase

334

53.8852 GBP

1p ordinary

Purchase

293

54.0500 GBP

1p ordinary

Purchase

217

53.8092 GBP

1p ordinary

Purchase

182

54.0519 GBP

1p ordinary

Purchase

158

54.0625 GBP

1p ordinary

Purchase

133

53.8578 GBP

1p ordinary

Purchase

127

53.8500 GBP

1p ordinary

Purchase

97

54.1000 GBP

1p ordinary

Purchase

62

54.1072 GBP

1p ordinary

Purchase

51

54.1250 GBP

1p ordinary

Purchase

35

53.8828 GBP

1p ordinary

Purchase

30

54.0000 GBP

1p ordinary

Purchase

11

53.8590 GBP

1p ordinary

Purchase

9

53.9196 GBP

1p ordinary

Purchase

2

53.9446 GBP

1p ordinary

Purchase

2

54.0098 GBP

1p ordinary

Purchase

1

53.8750 GBP

1p ordinary

Sale

330,750

53.8000 GBP

1p ordinary

Sale

30,388

53.8834 GBP

1p ordinary

Sale

29,632

53.9795 GBP

1p ordinary

Sale

15,700

53.9043 GBP

1p ordinary

Sale

6,855

53.8821 GBP

1p ordinary

Sale

5,523

53.8396 GBP

1p ordinary

Sale

3,633

53.7989 GBP

1p ordinary

Sale

3,359

53.7892 GBP

1p ordinary

Sale

3,326

53.9017 GBP

1p ordinary

Sale

3,000

53.8261 GBP

1p ordinary

Sale

2,495

53.7500 GBP

1p ordinary

Sale

1,571

54.0103 GBP

1p ordinary

Sale

1,460

54.0978 GBP

1p ordinary

Sale

1,387

53.7962 GBP

1p ordinary

Sale

1,348

53.8235 GBP

1p ordinary

Sale

1,216

53.7919 GBP

1p ordinary

Sale

1,060

53.8352 GBP

1p ordinary

Sale

998

54.0828 GBP

1p ordinary

Sale

958

53.8953 GBP

ADR

Sale

742

73.6684 USD

1p ordinary

Sale

700

53.7744 GBP

1p ordinary

Sale

625

54.0175 GBP

1p ordinary

Sale

577

53.8601 GBP

1p ordinary

Sale

414

53.8188 GBP

1p ordinary

Sale

411

53.9000 GBP

1p ordinary

Sale

410

54.1072 GBP

1p ordinary

Sale

400

53.9980 GBP

ADR

Sale

400

74.1050 USD

1p ordinary

Sale

398

54.1000 GBP

1p ordinary

Sale

335

54.0292 GBP

1p ordinary

Sale

320

54.0000 GBP

1p ordinary

Sale

281

53.9217 GBP

1p ordinary

Sale

276

53.8495 GBP

1p ordinary

Sale

237

53.8250 GBP

1p ordinary

Sale

235

54.0898 GBP

1p ordinary

Sale

224

53.8840 GBP

1p ordinary

Sale

175

53.9085 GBP

1p ordinary

Sale

162

54.0111 GBP

1p ordinary

Sale

153

54.0833 GBP

1p ordinary

Sale

139

53.8376 GBP

1p ordinary

Sale

133

53.8632 GBP

1p ordinary

Sale

121

53.7845 GBP

1p ordinary

Sale

113

53.7676 GBP

1p ordinary

Sale

110

53.7543 GBP

1p ordinary

Sale

108

53.8252 GBP

ADR

Sale

100

73.6700 USD

1p ordinary

Sale

85

53.7456 GBP

1p ordinary

Sale

81

54.0253 GBP

1p ordinary

Sale

78

53.8208 GBP

1p ordinary

Sale

72

53.7893 GBP

1p ordinary

Sale

52

53.9086 GBP

1p ordinary

Sale

50

53.7560 GBP

1p ordinary

Sale

30

53.7750 GBP

1p ordinary

Sale

30

53.8500 GBP

1p ordinary

Sale

15

54.1500 GBP

1p ordinary

Sale

11

54.0250 GBP

1p ordinary

Sale

10

53.7960 GBP

1p ordinary

Sale

10

53.9353 GBP

1p ordinary

Sale

9

53.9250 GBP

1p ordinary

Sale

3

53.9333 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

85

53.7457 GBP

1p ordinary

SWAP

Increasing Long

238

53.7494 GBP

1p ordinary

SWAP

Increasing Long

1

53.7500 GBP

1p ordinary

SWAP

Increasing Long

121

53.7845 GBP

1p ordinary

SWAP

Increasing Long

3,359

53.7892 GBP

1p ordinary

SWAP

Increasing Long

1,655

53.7892 USD

1p ordinary

SWAP

Increasing Long

72

53.7893 GBP

1p ordinary

SWAP

Increasing Long

1,216

53.7919 GBP

1p ordinary

SWAP

Increasing Long

10

53.7960 GBP

1p ordinary

SWAP

Increasing Long

1,387

53.7962 GBP

1p ordinary

SWAP

Increasing Long

3,633

53.7989 GBP

1p ordinary

SWAP

Increasing Long

227,757

53.8000 GBP

1p ordinary

SWAP

Increasing Long

1,671

53.8134 GBP

1p ordinary

SWAP

Increasing Long

1,060

53.8352 GBP

1p ordinary

SWAP

Increasing Long

663

53.8370 GBP

1p ordinary

SWAP

Increasing Long

139

53.8376 GBP

1p ordinary

SWAP

Increasing Long

5,523

53.8396 GBP

1p ordinary

SWAP

Increasing Long

27,888

53.8620 GBP

1p ordinary

SWAP

Increasing Long

2

53.8994 GBP

1p ordinary

SWAP

Increasing Long

29,632

53.9795 GBP

1p ordinary

SWAP

Increasing Long

842

53.9866 GBP

1p ordinary

SWAP

Increasing Long

1

53.9994 GBP

1p ordinary

SWAP

Increasing Long

1,455

54.0008 GBP

1p ordinary

SWAP

Increasing Long

1,571

54.0103 GBP

1p ordinary

SWAP

Increasing Long

1,855

54.2000 GBP

1p ordinary

SWAP

Decreasing Long

1

53.7500 GBP

1p ordinary

SWAP

Decreasing Long

716

53.7520 GBP

1p ordinary

SWAP

Decreasing Long

421

53.7615 GBP

1p ordinary

SWAP

Decreasing Long

18,920

53.8000 GBP

1p ordinary

SWAP

Decreasing Long

103

53.8014 GBP

1p ordinary

SWAP

Decreasing Long

35,565

53.8026 GBP

1p ordinary

SWAP

Decreasing Long

18,583

53.8108 GBP

1p ordinary

SWAP

Decreasing Long

33

53.8113 GBP

1p ordinary

SWAP

Decreasing Long

1,661

53.8389 GBP

1p ordinary

SWAP

Decreasing Long

38

53.8500 GBP

1p ordinary

SWAP

Decreasing Long

10,000

53.8514 GBP

1p ordinary

SWAP

Decreasing Long

3,603

53.8607 GBP

1p ordinary

SWAP

Decreasing Long

4,163

53.8658 GBP

1p ordinary

SWAP

Decreasing Long

29,958

53.8696 GBP

1p ordinary

SWAP

Decreasing Long

724

53.8811 GBP

1p ordinary

SWAP

Decreasing Long

5,195

53.8989 GBP

1p ordinary

SWAP

Decreasing Long

1,015

53.9466 GBP

1p ordinary

SWAP

Decreasing Long

1,208

53.9886 GBP

1p ordinary

SWAP

Decreasing Long

25

54.0225 GBP

1p ordinary

SWAP

Decreasing Long

103

54.0291 GBP

1p ordinary

CFD

Decreasing Short

17

53.7964 GBP

1p ordinary

CFD

Decreasing Short

244

53.7992 GBP

1p ordinary

CFD

Decreasing Short

98

53.8176 GBP

1p ordinary

CFD

Decreasing Short

6,855

53.8821 GBP

1p ordinary

CFD

Decreasing Short

292

54.0483 GBP

1p ordinary

CFD

Increasing Short

5,532

53.7500 GBP

1p ordinary

CFD

Increasing Short

207

53.7515 GBP

1p ordinary

CFD

Increasing Short

365

53.8000 GBP

1p ordinary

CFD

Increasing Short

330

53.9737 GBP

1p ordinary

CFD

Increasing Short

70

54.0037 GBP

1p ordinary

CFD

Increasing Short

2

54.0100 GBP

1p ordinary

CFD

Increasing Short

293

54.0500 GBP

1p ordinary

CFD

Increasing Short

320

54.1532 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:

29 May 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213