Form 8.3 -SPIRENT COMMUNICATIONS 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

SPIRENT COMMUNICATIONS 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:

21 May 2024

(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:

3 1/3p ordinary

Interests

Short Positions

Number

(%)

Number

(%)

(1)

Relevant securities owned

and/or controlled:

14,081,779

2.43%

5,967,544

1.03%

(2)

Cash-settled derivatives:

and/or controlled:

1,957,139

0.34%

14,016,617

2.42%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

16,038,918

2.77%

19,984,161

3.45%

(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 EXEMPT PRINCIPAL TRADER

(a)

Purchases and sales

Class of relevant

Purchase/sale

Number of

Price per unit

security

securities

3 1/3p ordinary

Purchase

5,000,000

1.9000 GBP

3 1/3p ordinary

Purchase

171,602

1.8690 GBP

3 1/3p ordinary

Purchase

61,510

1.8772 GBP

3 1/3p ordinary

Purchase

50,010

1.8684 GBP

3 1/3p ordinary

Purchase

48,977

1.8732 GBP

3 1/3p ordinary

Purchase

40,361

1.8777 GBP

3 1/3p ordinary

Purchase

37,561

1.8698 GBP

3 1/3p ordinary

Purchase

28,554

1.8761 GBP

3 1/3p ordinary

Purchase

22,377

1.8805 GBP

3 1/3p ordinary

Purchase

21,826

1.8774 GBP

3 1/3p ordinary

Purchase

21,710

1.8799 GBP

3 1/3p ordinary

Purchase

10,707

1.8786 GBP

3 1/3p ordinary

Purchase

2,331

1.8762 GBP

3 1/3p ordinary

Purchase

1,875

1.8680 GBP

3 1/3p ordinary

Purchase

1,526

1.8721 GBP

3 1/3p ordinary

Purchase

1,018

1.8802 GBP

3 1/3p ordinary

Purchase

855

1.8716 GBP

3 1/3p ordinary

Purchase

845

1.8833 GBP

3 1/3p ordinary

Purchase

527

1.8729 GBP

3 1/3p ordinary

Purchase

501

1.8700 GBP

3 1/3p ordinary

Purchase

62

1.8726 GBP

3 1/3p ordinary

Purchase

1

1.8760 GBP

3 1/3p ordinary

Sale

5,000,000

1.9000 GBP

3 1/3p ordinary

Sale

721,840

1.8670 GBP

3 1/3p ordinary

Sale

238,543

1.8700 GBP

3 1/3p ordinary

Sale

195,020

1.8690 GBP

3 1/3p ordinary

Sale

89,721

1.8704 GBP

3 1/3p ordinary

Sale

59,519

1.8750 GBP

3 1/3p ordinary

Sale

57,317

1.8812 GBP

3 1/3p ordinary

Sale

12,094

1.8718 GBP

3 1/3p ordinary

Sale

6,425

1.8713 GBP

3 1/3p ordinary

Sale

3,842

1.8755 GBP

3 1/3p ordinary

Sale

1,526

1.8723 GBP

3 1/3p ordinary

Sale

1,115

1.8745 GBP

3 1/3p ordinary

Sale

845

1.8835 GBP

3 1/3p ordinary

Sale

540

1.8800 GBP

3 1/3p ordinary

Sale

56

1.8818 GBP

3 1/3p ordinary

Sale

33

1.8790 GBP

3 1/3p ordinary

Sale

1

1.8760 GBP

3 1/3p ordinary

Sale

50,002

1.8684 GBP

(b)

Cash-settled derivative transactions

Class of

Product

Nature of dealing

Number of

Price per

relevant

description

reference

unit

security

securities

3 1/3p ordinary

SWAP

Closing Short

238,543

1.8700 GBP

3 1/3p ordinary

SWAP

Closing Short

721,840

1.8670 GBP

3 1/3p ordinary

SWAP

Decreasing Long

527

1.8729 GBP

3 1/3p ordinary

SWAP

Decreasing Long

1,883

1.8690 GBP

3 1/3p ordinary

SWAP

Decreasing Long

3,903

1.8749 GBP

3 1/3p ordinary

SWAP

Decreasing Short

155

1.8998 GBP

3 1/3p ordinary

CFD

Decreasing Short

383

1.8800 GBP

3 1/3p ordinary

SWAP

Decreasing Short

388

1.8737 GBP

3 1/3p ordinary

CFD

Decreasing Short

578

1.8689 GBP

3 1/3p ordinary

SWAP

Decreasing Short

1,699

1.8792 GBP

3 1/3p ordinary

SWAP

Decreasing Short

5,677

1.8787 GBP

3 1/3p ordinary

SWAP

Decreasing Short

57,317

1.8812 GBP

3 1/3p ordinary

CFD

Decreasing Short

169,336

1.8690 GBP

3 1/3p ordinary

SWAP

Increasing Long

81,957

1.8696 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,331

1.8762 GBP

3 1/3p ordinary

SWAP

Increasing Short

3,655

1.8690 GBP

3 1/3p ordinary

SWAP

Increasing Short

4,132

1.8690 GBP

3 1/3p ordinary

CFD

Increasing Short

7,798

1.8719 GBP

3 1/3p ordinary

SWAP

Increasing Short

28,554

1.8761 GBP

3 1/3p ordinary

SWAP

Increasing Short

40,361

1.8777 GBP

3 1/3p ordinary

CFD

Increasing Short

45,677

1.8792 GBP

3 1/3p ordinary

CFD

Increasing Short

54,794

1.8800 GBP

3 1/3p ordinary

CFD

Increasing Short

169,719

1.8689 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)

Exercising

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:

22 May 2024

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213