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:

15 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:

2,482,148

1.61%

3,183,751

2.07%

(2)

Cash-settled derivatives:

2,522,820

1.64%

2,075,309

1.35%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

5,004,968

3.25%

5,259,060

3.42%

(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

75,000

56.0030 GBP

1p ordinary

Purchase

70,584

56.1508 GBP

1p ordinary

Purchase

62,155

56.1500 GBP

1p ordinary

Purchase

33,835

56.3500 GBP

1p ordinary

Purchase

25,000

56.2515 GBP

1p ordinary

Purchase

18,194

56.2358 GBP

1p ordinary

Purchase

15,173

56.1142 GBP

1p ordinary

Purchase

12,500

56.2159 GBP

1p ordinary

Purchase

11,767

56.0211 GBP

1p ordinary

Purchase

10,000

56.0389 GBP

1p ordinary

Purchase

9,516

56.1939 GBP

1p ordinary

Purchase

6,587

56.1064 GBP

1p ordinary

Purchase

6,381

56.4514 GBP

1p ordinary

Purchase

3,236

56.3556 GBP

1p ordinary

Purchase

3,100

56.4306 GBP

1p ordinary

Purchase

2,755

56.2446 GBP

1p ordinary

Purchase

2,574

56.1970 GBP

1p ordinary

Purchase

2,143

56.2022 GBP

1p ordinary

Purchase

1,981

56.4867 GBP

1p ordinary

Purchase

1,831

56.1878 GBP

1p ordinary

Purchase

1,830

55.9750 GBP

1p ordinary

Purchase

1,796

56.2018 GBP

1p ordinary

Purchase

1,454

56.2712 GBP

1p ordinary

Purchase

1,446

56.2696 GBP

1p ordinary

Purchase

1,314

56.0671 GBP

1p ordinary

Purchase

1,195

56.3000 GBP

1p ordinary

Purchase

927

56.2499 GBP

1p ordinary

Purchase

913

56.1415 GBP

1p ordinary

Purchase

797

55.9913 GBP

1p ordinary

Purchase

738

56.1263 GBP

1p ordinary

Purchase

699

56.4040 GBP

1p ordinary

Purchase

679

56.0250 GBP

1p ordinary

Purchase

625

56.3552 GBP

1p ordinary

Purchase

600

56.3784 GBP

1p ordinary

Purchase

510

56.0750 GBP

1p ordinary

Purchase

448

56.3754 GBP

1p ordinary

Purchase

420

56.4403 GBP

1p ordinary

Purchase

364

56.5149 GBP

1p ordinary

Purchase

309

56.2500 GBP

1p ordinary

Purchase

276

56.1000 GBP

1p ordinary

Purchase

222

56.1335 GBP

1p ordinary

Purchase

215

56.0500 GBP

1p ordinary

Purchase

205

56.0507 GBP

1p ordinary

Purchase

202

56.2000 GBP

ADR

Purchase

200

74.9700 USD

1p ordinary

Purchase

189

56.0416 GBP

1p ordinary

Purchase

169

56.1167 GBP

1p ordinary

Purchase

168

56.3261 GBP

1p ordinary

Purchase

145

56.2381 GBP

1p ordinary

Purchase

137

56.1523 GBP

1p ordinary

Purchase

129

56.2234 GBP

1p ordinary

Purchase

120

56.2300 GBP

1p ordinary

Purchase

120

56.0404 GBP

1p ordinary

Purchase

101

55.9990 GBP

1p ordinary

Purchase

92

56.1750 GBP

1p ordinary

Purchase

59

56.5271 GBP

1p ordinary

Purchase

54

56.3250 GBP

1p ordinary

Purchase

39

56.1250 GBP

1p ordinary

Purchase

33

55.9500 GBP

1p ordinary

Purchase

13

56.0000 GBP

1p ordinary

Purchase

12

56.1541 GBP

1p ordinary

Purchase

3

56.2750 GBP

1p ordinary

Purchase

2

56.1612 GBP

1p ordinary

Sale

184,895

56.1500 GBP

1p ordinary

Sale

87,480

56.1629 GBP

1p ordinary

Sale

62,300

56.0957 GBP

1p ordinary

Sale

21,431

56.2621 GBP

1p ordinary

Sale

12,819

56.3750 GBP

1p ordinary

Sale

12,500

56.1878 GBP

1p ordinary

Sale

12,420

56.0000 GBP

1p ordinary

Sale

10,007

56.1097 GBP

1p ordinary

Sale

8,142

56.1489 GBP

1p ordinary

Sale

7,800

56.1224 GBP

1p ordinary

Sale

6,500

56.2143 GBP

1p ordinary

Sale

6,430

56.0651 GBP

1p ordinary

Sale

6,409

56.5856 GBP

1p ordinary

Sale

3,665

56.4250 GBP

1p ordinary

Sale

3,400

56.1416 GBP

1p ordinary

Sale

3,367

56.1786 GBP

1p ordinary

Sale

3,073

56.2187 GBP

1p ordinary

Sale

2,723

56.0591 GBP

1p ordinary

Sale

2,521

56.0214 GBP

1p ordinary

Sale

2,420

56.4841 GBP

1p ordinary

Sale

2,098

56.1867 GBP

1p ordinary

Sale

1,761

56.1415 GBP

1p ordinary

Sale

1,745

56.1025 GBP

1p ordinary

Sale

1,583

56.4015 GBP

1p ordinary

Sale

1,356

56.1977 GBP

1p ordinary

Sale

1,235

56.2565 GBP

1p ordinary

Sale

1,233

56.3333 GBP

1p ordinary

Sale

1,227

56.5500 GBP

1p ordinary

Sale

1,055

56.1876 GBP

1p ordinary

Sale

1,007

56.2726 GBP

1p ordinary

Sale

922

56.1920 GBP

1p ordinary

Sale

889

56.1388 GBP

1p ordinary

Sale

834

56.0197 GBP

1p ordinary

Sale

768

56.4995 GBP

1p ordinary

Sale

679

56.0250 GBP

1p ordinary

Sale

664

56.4652 GBP

1p ordinary

Sale

533

56.2155 GBP

1p ordinary

Sale

510

56.0750 GBP

1p ordinary

Sale

486

56.2188 GBP

1p ordinary

Sale

484

56.3780 GBP

1p ordinary

Sale

452

56.2026 GBP

1p ordinary

Sale

446

56.4000 GBP

1p ordinary

Sale

415

56.4398 GBP

1p ordinary

Sale

396

56.0621 GBP

1p ordinary

Sale

384

56.3000 GBP

1p ordinary

Sale

379

56.6008 GBP

1p ordinary

Sale

357

56.3718 GBP

1p ordinary

Sale

326

56.0500 GBP

1p ordinary

Sale

320

56.1797 GBP

1p ordinary

Sale

309

56.2500 GBP

1p ordinary

Sale

276

56.1000 GBP

1p ordinary

Sale

222

56.0813 GBP

1p ordinary

Sale

219

56.1026 GBP

1p ordinary

Sale

215

56.5250 GBP

1p ordinary

Sale

211

56.2312 GBP

1p ordinary

Sale

210

55.9943 GBP

1p ordinary

Sale

200

56.5000 GBP

ADR

Sale

200

74.9700 USD

1p ordinary

Sale

200

56.3765 GBP

1p ordinary

Sale

191

56.3839 GBP

1p ordinary

Sale

178

56.2000 GBP

1p ordinary

Sale

174

56.0432 GBP

1p ordinary

Sale

164

56.2954 GBP

1p ordinary

Sale

162

56.0193 GBP

1p ordinary

Sale

161

56.2943 GBP

1p ordinary

Sale

120

56.3104 GBP

1p ordinary

Sale

106

56.0346 GBP

1p ordinary

Sale

103

56.0516 GBP

1p ordinary

Sale

95

56.0510 GBP

1p ordinary

Sale

84

56.3500 GBP

1p ordinary

Sale

75

56.4340 GBP

1p ordinary

Sale

68

55.9944 GBP

1p ordinary

Sale

64

56.1750 GBP

1p ordinary

Sale

62

56.1387 GBP

1p ordinary

Sale

58

56.0258 GBP

1p ordinary

Sale

56

56.2921 GBP

1p ordinary

Sale

53

55.9643 GBP

1p ordinary

Sale

48

56.2125 GBP

1p ordinary

Sale

42

56.0916 GBP

1p ordinary

Sale

39

56.1250 GBP

1p ordinary

Sale

37

56.1386 GBP

1p ordinary

Sale

21

56.2615 GBP

1p ordinary

Sale

9

56.4516 GBP

1p ordinary

Sale

8

56.1737 GBP

1p ordinary

Sale

7

56.1821 GBP

1p ordinary

Sale

4

56.1125 GBP

1p ordinary

Sale

4

56.3250 GBP

1p ordinary

Sale

3

56.2750 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

10,000

56.0389 GBP

1p ordinary

SWAP

Increasing Long

53

55.9643 GBP

1p ordinary

SWAP

Increasing Long

278

55.9944 GBP

1p ordinary

SWAP

Increasing Long

11,767

56.0000 GBP

1p ordinary

SWAP

Increasing Long

162

56.0193 GBP

1p ordinary

SWAP

Increasing Long

6,430

56.0651 GBP

1p ordinary

SWAP

Increasing Long

62,300

56.0957 GBP

1p ordinary

SWAP

Increasing Long

1,765

56.1025 GBP

1p ordinary

SWAP

Increasing Long

199

56.1026 GBP

1p ordinary

SWAP

Increasing Long

10,007

56.1096 GBP

1p ordinary

SWAP

Increasing Long

164

56.1242 GBP

1p ordinary

SWAP

Increasing Long

37

56.1386 GBP

1p ordinary

SWAP

Increasing Long

951

56.1387 GBP

1p ordinary

SWAP

Increasing Long

5,161

56.1415 GBP

1p ordinary

SWAP

Increasing Long

300

56.1472 GBP

1p ordinary

SWAP

Increasing Long

8,142

56.1489 GBP

1p ordinary

SWAP

Increasing Long

130,391

56.1500 GBP

1p ordinary

SWAP

Increasing Long

20,884

56.1580 GBP

1p ordinary

SWAP

Increasing Long

3,466

56.1724 GBP

1p ordinary

SWAP

Increasing Long

8

56.1738 GBP

1p ordinary

SWAP

Increasing Long

3,367

56.1786 GBP

1p ordinary

SWAP

Increasing Long

320

56.1797 GBP

1p ordinary

SWAP

Increasing Long

8

56.1843 GBP

1p ordinary

SWAP

Increasing Long

6,500

56.2143 GBP

1p ordinary

SWAP

Increasing Long

486

56.2188 GBP

1p ordinary

SWAP

Increasing Long

1,235

56.2565 GBP

1p ordinary

SWAP

Increasing Long

21

56.2614 GBP

1p ordinary

SWAP

Increasing Long

21,431

56.2621 GBP

1p ordinary

SWAP

Increasing Long

56

56.2921 GBP

1p ordinary

SWAP

Increasing Long

161

56.2943 GBP

1p ordinary

SWAP

Increasing Long

12

56.2994 GBP

1p ordinary

SWAP

Increasing Long

1,233

56.3333 GBP

1p ordinary

SWAP

Increasing Long

357

56.3718 GBP

1p ordinary

SWAP

Increasing Long

191

56.3839 GBP

1p ordinary

SWAP

Increasing Long

84

56.4500 GBP

1p ordinary

SWAP

Increasing Long

664

56.4652 GBP

1p ordinary

SWAP

Increasing Long

768

56.4995 GBP

1p ordinary

SWAP

Decreasing Long

1,549

55.9750 GBP

1p ordinary

SWAP

Decreasing Long

11,767

56.0211 GBP

1p ordinary

SWAP

Decreasing Long

104

56.0461 GBP

1p ordinary

SWAP

Decreasing Long

15,000

56.0901 GBP

1p ordinary

SWAP

Decreasing Long

102

56.0946 GBP

1p ordinary

SWAP

Decreasing Long

6,587

56.1064 GBP

1p ordinary

SWAP

Decreasing Long

15,173

56.1142 GBP

1p ordinary

SWAP

Decreasing Long

12,959

56.1500 GBP

1p ordinary

SWAP

Decreasing Long

12

56.1544 GBP

1p ordinary

SWAP

Decreasing Long

2

56.1600 GBP

1p ordinary

SWAP

Decreasing Long

9,516

56.1939 GBP

1p ordinary

SWAP

Decreasing Long

1,405

56.2048 GBP

1p ordinary

SWAP

Decreasing Long

12,500

56.2159 GBP

1p ordinary

SWAP

Decreasing Long

224

56.3000 GBP

1p ordinary

SWAP

Decreasing Long

35

56.3202 GBP

1p ordinary

SWAP

Decreasing Long

168

56.3261 GBP

1p ordinary

SWAP

Decreasing Long

33,751

56.3500 GBP

1p ordinary

SWAP

Decreasing Long

1,442

56.3545 GBP

1p ordinary

SWAP

Decreasing Long

625

56.3552 GBP

1p ordinary

SWAP

Decreasing Long

3,236

56.3556 GBP

1p ordinary

SWAP

Decreasing Long

3,100

56.4306 GBP

1p ordinary

SWAP

Decreasing Long

10,000

56.4935 GBP

1p ordinary

SWAP

Decreasing Long

59

56.5271 GBP

1p ordinary

CFD

Increasing Long

351

56.2117 GBP

1p ordinary

CFD

Opening Short

75,000

56.0029 GBP

1p ordinary

CFD

Increasing Short

363

56.1330 GBP

1p ordinary

CFD

Increasing Short

1,825

56.1539 GBP

1p ordinary

CFD

Increasing Short

7,180

56.4559 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:

18 May 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213