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:

24 Feb 2025

(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:

45,147,189

7.80%

570,745

0.10%

(2)

Cash-settled derivatives:

and/or controlled:

276,858

0.05%

44,775,612

7.74%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

45,424,047

7.85%

45,346,357

7.84%

(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

102,036

1.8746 GBP

3 1/3p ordinary

Purchase

26,726

1.8750 GBP

3 1/3p ordinary

Purchase

24,076

1.8698 GBP

3 1/3p ordinary

Purchase

12,764

1.8701 GBP

3 1/3p ordinary

Purchase

9,458

1.8719 GBP

3 1/3p ordinary

Purchase

7,179

1.8717 GBP

3 1/3p ordinary

Purchase

6,631

1.8720 GBP

3 1/3p ordinary

Purchase

5,767

1.8696 GBP

3 1/3p ordinary

Purchase

3,146

1.8730 GBP

3 1/3p ordinary

Purchase

3,073

1.8707 GBP

3 1/3p ordinary

Purchase

2,955

1.8695 GBP

3 1/3p ordinary

Purchase

2,912

1.8715 GBP

3 1/3p ordinary

Purchase

2,473

1.8721 GBP

3 1/3p ordinary

Purchase

1,972

1.8710 GBP

3 1/3p ordinary

Purchase

1,599

1.8686 GBP

3 1/3p ordinary

Purchase

1,574

1.8729 GBP

3 1/3p ordinary

Purchase

1,533

1.8640 GBP

3 1/3p ordinary

Purchase

1,306

1.8709 GBP

3 1/3p ordinary

Purchase

1,190

1.8650 GBP

3 1/3p ordinary

Purchase

981

1.8735 GBP

3 1/3p ordinary

Purchase

924

1.8660 GBP

3 1/3p ordinary

Purchase

903

1.8704 GBP

3 1/3p ordinary

Purchase

863

1.8676 GBP

3 1/3p ordinary

Purchase

276

1.8732 GBP

3 1/3p ordinary

Purchase

200

1.8725 GBP

3 1/3p ordinary

Purchase

42

1.8740 GBP

3 1/3p ordinary

Purchase

2

1.8700 GBP

3 1/3p ordinary

Sale

56,957

1.8750 GBP

3 1/3p ordinary

Sale

50,495

1.8741 GBP

3 1/3p ordinary

Sale

50,280

1.8700 GBP

3 1/3p ordinary

Sale

38,913

1.8713 GBP

3 1/3p ordinary

Sale

21,951

1.8730 GBP

3 1/3p ordinary

Sale

9,292

1.8706 GBP

3 1/3p ordinary

Sale

8,728

1.8698 GBP

3 1/3p ordinary

Sale

7,639

1.8721 GBP

3 1/3p ordinary

Sale

6,110

1.8691 GBP

3 1/3p ordinary

Sale

5,395

1.8693 GBP

3 1/3p ordinary

Sale

3,215

1.8711 GBP

3 1/3p ordinary

Sale

3,207

1.8689 GBP

3 1/3p ordinary

Sale

3,174

1.8718 GBP

3 1/3p ordinary

Sale

2,327

1.8724 GBP

3 1/3p ordinary

Sale

1,459

1.8696 GBP

3 1/3p ordinary

Sale

1,190

1.8650 GBP

3 1/3p ordinary

Sale

1,076

1.8710 GBP

3 1/3p ordinary

Sale

1,045

1.8640 GBP

3 1/3p ordinary

Sale

1,012

1.8720 GBP

3 1/3p ordinary

Sale

924

1.8660 GBP

3 1/3p ordinary

Sale

619

1.8735 GBP

3 1/3p ordinary

Sale

540

1.8714 GBP

3 1/3p ordinary

Sale

510

1.8694 GBP

3 1/3p ordinary

Sale

460

1.8715 GBP

3 1/3p ordinary

Sale

232

1.8678 GBP

3 1/3p ordinary

Sale

226

1.8676 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

Decreasing Short

64

1.8510 GBP

3 1/3p ordinary

SWAP

Decreasing Short

9,209

1.8685 GBP

3 1/3p ordinary

SWAP

Decreasing Short

6,110

1.8691 GBP

3 1/3p ordinary

SWAP

Decreasing Short

38,913

1.8713 GBP

3 1/3p ordinary

SWAP

Decreasing Short

540

1.8714 GBP

3 1/3p ordinary

SWAP

Decreasing Short

3,174

1.8718 GBP

3 1/3p ordinary

SWAP

Decreasing Short

50,701

1.8721 GBP

3 1/3p ordinary

SWAP

Decreasing Short

6,477

1.8728 GBP

3 1/3p ordinary

SWAP

Decreasing Short

18,805

1.8730 GBP

3 1/3p ordinary

SWAP

Decreasing Short

212

1.8734 GBP

3 1/3p ordinary

SWAP

Decreasing Short

1,990

1.8748 GBP

3 1/3p ordinary

SWAP

Decreasing Short

234

1.8750 GBP

3 1/3p ordinary

SWAP

Increasing Short

12,764

1.8701 GBP

3 1/3p ordinary

SWAP

Increasing Short

323

1.8710 GBP

3 1/3p ordinary

SWAP

Increasing Short

192

1.8711 GBP

3 1/3p ordinary

SWAP

Increasing Short

5,674

1.8720 GBP

3 1/3p ordinary

SWAP

Increasing Short

590

1.8722 GBP

3 1/3p ordinary

SWAP

Increasing Short

200

1.8725 GBP

3 1/3p ordinary

SWAP

Increasing Short

10,858

1.8728 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,574

1.8730 GBP

3 1/3p ordinary

SWAP

Increasing Short

15

1.8746 GBP

3 1/3p ordinary

SWAP

Increasing Short

38

1.8748 GBP

3 1/3p ordinary

SWAP

Increasing Short

47,847

1.8750 GBP

3 1/3p ordinary

CFD

Increasing Short

333

1.8736 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:

25 Feb 2025

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213