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:

18 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:

2,575,101

1.67%

2,496,336

1.62%

(2)

Cash-settled derivatives:

2,503,332

1.63%

2,177,348

1.41%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

5,078,433

3.30%

4,673,684

3.04%

(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

658,001

56.0000 GBP

1p ordinary

Purchase

139,305

55.5000 GBP

1p ordinary

Purchase

70,000

55.5278 GBP

1p ordinary

Purchase

36,874

55.5010 GBP

1p ordinary

Purchase

14,465

55.5964 GBP

1p ordinary

Purchase

11,684

55.8368 GBP

1p ordinary

Purchase

10,000

55.8222 GBP

1p ordinary

Purchase

7,590

55.4917 GBP

1p ordinary

Purchase

6,051

55.4889 GBP

1p ordinary

Purchase

4,200

56.0495 GBP

1p ordinary

Purchase

4,103

55.8889 GBP

1p ordinary

Purchase

4,012

55.6388 GBP

1p ordinary

Purchase

3,088

55.7000 GBP

1p ordinary

Purchase

2,320

55.6406 GBP

1p ordinary

Purchase

2,298

55.5245 GBP

1p ordinary

Purchase

2,113

55.6670 GBP

1p ordinary

Purchase

1,343

55.6296 GBP

1p ordinary

Purchase

1,289

56.0431 GBP

1p ordinary

Purchase

1,195

56.0091 GBP

1p ordinary

Purchase

927

55.9172 GBP

1p ordinary

Purchase

632

55.6555 GBP

1p ordinary

Purchase

542

55.6421 GBP

1p ordinary

Purchase

486

55.9417 GBP

1p ordinary

Purchase

482

56.0936 GBP

1p ordinary

Purchase

399

55.9644 GBP

1p ordinary

Purchase

380

56.1508 GBP

1p ordinary

Purchase

310

56.0250 GBP

1p ordinary

Purchase

302

55.6824 GBP

1p ordinary

Purchase

269

55.8030 GBP

1p ordinary

Purchase

266

55.6449 GBP

1p ordinary

Purchase

241

55.9191 GBP

1p ordinary

Purchase

230

55.9500 GBP

ADR

Purchase

200

75.1300 USD

1p ordinary

Purchase

176

55.8630 GBP

1p ordinary

Purchase

170

56.0500 GBP

1p ordinary

Purchase

121

55.5044 GBP

1p ordinary

Purchase

120

56.0525 GBP

1p ordinary

Purchase

120

55.9425 GBP

1p ordinary

Purchase

108

55.9736 GBP

ADR

Purchase

100

74.5500 USD

1p ordinary

Purchase

100

55.6056 GBP

1p ordinary

Purchase

98

55.7750 GBP

1p ordinary

Purchase

67

55.8552 GBP

1p ordinary

Purchase

61

55.8754 GBP

1p ordinary

Purchase

58

55.4890 GBP

1p ordinary

Purchase

40

55.7250 GBP

1p ordinary

Purchase

36

55.6500 GBP

1p ordinary

Purchase

32

55.7500 GBP

1p ordinary

Purchase

30

55.9000 GBP

1p ordinary

Purchase

29

55.5006 GBP

1p ordinary

Purchase

29

56.0244 GBP

1p ordinary

Purchase

26

55.4888 GBP

1p ordinary

Purchase

22

55.5750 GBP

1p ordinary

Purchase

21

55.6309 GBP

1p ordinary

Purchase

15

55.4887 GBP

1p ordinary

Purchase

14

55.6292 GBP

1p ordinary

Purchase

6

55.8583 GBP

1p ordinary

Sale

66,027

55.5000 GBP

1p ordinary

Sale

35,534

55.6052 GBP

1p ordinary

Sale

24,670

55.7235 GBP

1p ordinary

Sale

21,501

55.4961 GBP

1p ordinary

Sale

9,571

55.9225 GBP

1p ordinary

Sale

7,233

55.5083 GBP

1p ordinary

Sale

5,885

56.0000 GBP

1p ordinary

Sale

4,921

56.0164 GBP

1p ordinary

Sale

4,323

55.8437 GBP

1p ordinary

Sale

3,301

55.9100 GBP

1p ordinary

Sale

2,917

55.9344 GBP

1p ordinary

Sale

2,646

55.7054 GBP

1p ordinary

Sale

2,423

55.5344 GBP

1p ordinary

Sale

2,251

55.5773 GBP

1p ordinary

Sale

1,795

55.7083 GBP

1p ordinary

Sale

1,640

55.9113 GBP

1p ordinary

Sale

1,538

55.5996 GBP

1p ordinary

Sale

1,414

55.9038 GBP

1p ordinary

Sale

1,243

55.9822 GBP

1p ordinary

Sale

989

55.8746 GBP

1p ordinary

Sale

761

55.9908 GBP

1p ordinary

Sale

736

55.8902 GBP

1p ordinary

Sale

549

55.6311 GBP

1p ordinary

Sale

534

55.9500 GBP

1p ordinary

Sale

340

55.8087 GBP

1p ordinary

Sale

247

56.0174 GBP

ADR

Sale

200

75.1300 USD

1p ordinary

Sale

152

55.5084 GBP

1p ordinary

Sale

135

56.0500 GBP

1p ordinary

Sale

125

55.6500 GBP

1p ordinary

Sale

120

55.7254 GBP

1p ordinary

Sale

101

55.8616 GBP

ADR

Sale

100

74.5500 USD

1p ordinary

Sale

98

55.6305 GBP

1p ordinary

Sale

72

55.9750 GBP

1p ordinary

Sale

59

55.9894 GBP

1p ordinary

Sale

39

55.9666 GBP

1p ordinary

Sale

35

55.8185 GBP

1p ordinary

Sale

32

55.6352 GBP

1p ordinary

Sale

18

56.1000 GBP

1p ordinary

Sale

16

55.7000 GBP

1p ordinary

Sale

15

55.7060 GBP

1p ordinary

Sale

12

55.9250 GBP

1p ordinary

Sale

12

55.8611 GBP

1p ordinary

Sale

6

55.5333 GBP

1p ordinary

Sale

3

55.6083 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 Short

302

55.6824 GBP

1p ordinary

SWAP

Increasing Short

40

55.7249 GBP

1p ordinary

SWAP

Increasing Long

222

55.4889 GBP

1p ordinary

SWAP

Increasing Long

2,037

55.4889 USD

1p ordinary

SWAP

Increasing Long

7,259

55.4917 GBP

1p ordinary

SWAP

Increasing Long

21,501

55.4961 GBP

1p ordinary

SWAP

Increasing Long

17,505

55.5000 GBP

1p ordinary

SWAP

Increasing Long

2,423

55.5344 GBP

1p ordinary

SWAP

Increasing Long

1,538

55.5996 GBP

1p ordinary

SWAP

Increasing Long

4

55.6187 GBP

1p ordinary

SWAP

Increasing Long

9

55.6222 GBP

1p ordinary

SWAP

Increasing Long

2,646

55.7054 GBP

1p ordinary

SWAP

Increasing Long

15

55.7062 GBP

1p ordinary

SWAP

Increasing Long

1,795

55.7083 GBP

1p ordinary

SWAP

Increasing Long

524

55.7301 GBP

1p ordinary

SWAP

Increasing Long

340

55.8086 GBP

1p ordinary

SWAP

Increasing Long

10,799

55.8506 GBP

1p ordinary

SWAP

Increasing Long

1,640

55.9113 GBP

1p ordinary

SWAP

Increasing Long

9,571

55.9225 GBP

1p ordinary

SWAP

Increasing Long

12

55.9495 GBP

1p ordinary

SWAP

Increasing Long

58

55.9649 GBP

1p ordinary

SWAP

Increasing Long

761

55.9908 GBP

1p ordinary

SWAP

Increasing Long

47

55.9995 GBP

1p ordinary

SWAP

Increasing Long

5,951

56.0000 GBP

1p ordinary

SWAP

Increasing Long

4,921

56.0164 GBP

1p ordinary

SWAP

Increasing Long

451

56.0274 GBP

1p ordinary

SWAP

Increasing Long

18

56.1000 GBP

1p ordinary

SWAP

Increasing Long

1,406

56.1718 GBP

1p ordinary

SWAP

Decreasing Long

55,217

55.5000 GBP

1p ordinary

SWAP

Decreasing Long

29

55.5008 GBP

1p ordinary

SWAP

Decreasing Long

36,874

55.5010 GBP

1p ordinary

SWAP

Decreasing Long

8,225

55.5027 GBP

1p ordinary

SWAP

Decreasing Long

121

55.5044 GBP

1p ordinary

SWAP

Decreasing Long

2,298

55.5244 GBP

1p ordinary

SWAP

Decreasing Long

79

55.5781 GBP

1p ordinary

SWAP

Decreasing Long

69

55.6022 GBP

1p ordinary

SWAP

Decreasing Long

128

55.6055 GBP

1p ordinary

SWAP

Decreasing Long

4,728

55.6274 GBP

1p ordinary

SWAP

Decreasing Long

14

55.6291 GBP

1p ordinary

SWAP

Decreasing Long

213

55.6305 GBP

1p ordinary

SWAP

Decreasing Long

320

55.6366 GBP

1p ordinary

SWAP

Decreasing Long

680

55.6367 GBP

1p ordinary

SWAP

Decreasing Long

1,525

55.6372 GBP

1p ordinary

SWAP

Decreasing Long

680

55.6408 GBP

1p ordinary

SWAP

Decreasing Long

1,738

55.6409 GBP

1p ordinary

SWAP

Decreasing Long

947

55.6417 GBP

1p ordinary

SWAP

Decreasing Long

465

55.6419 GBP

1p ordinary

SWAP

Decreasing Long

115

55.6438 GBP

1p ordinary

SWAP

Decreasing Long

165

55.6440 GBP

1p ordinary

SWAP

Decreasing Long

234

55.6442 GBP

1p ordinary

SWAP

Decreasing Long

829

55.6444 GBP

1p ordinary

SWAP

Decreasing Long

266

55.6448 GBP

1p ordinary

SWAP

Decreasing Long

632

55.6555 GBP

1p ordinary

SWAP

Decreasing Long

2,113

55.6670 GBP

1p ordinary

SWAP

Decreasing Long

3,088

55.7000 GBP

1p ordinary

SWAP

Decreasing Long

10,000

55.8222 GBP

1p ordinary

SWAP

Decreasing Long

11,684

55.8368 GBP

1p ordinary

SWAP

Decreasing Long

4,103

55.8889 GBP

1p ordinary

SWAP

Decreasing Long

718

55.9497 GBP

1p ordinary

SWAP

Decreasing Long

179

55.9513 GBP

1p ordinary

SWAP

Decreasing Long

488

55.9544 GBP

1p ordinary

SWAP

Decreasing Long

1

56.0005 GBP

1p ordinary

SWAP

Decreasing Long

29

56.0243 GBP

1p ordinary

SWAP

Decreasing Long

1,289

56.0431 GBP

1p ordinary

SWAP

Decreasing Long

482

56.0936 GBP

1p ordinary

SWAP

Decreasing Long

380

56.1508 GBP

1p ordinary

CFD

Decreasing Short

8,671

55.7655 GBP

1p ordinary

CFD

Decreasing Short

1,269

55.8157 GBP

1p ordinary

CFD

Increasing Short

2,412

55.5038 GBP

1p ordinary

CFD

Increasing Short

70,000

55.5277 GBP

1p ordinary

CFD

Increasing Short

235

55.9540 GBP

1p ordinary

CFD

Increasing Short

786

56.0247 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:

19 May 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213