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:

05 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:

44,781,741

7.74%

778,531

0.13%

(2)

Cash-settled derivatives:

and/or controlled:

459,572

0.08%

44,344,259

7.66%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

45,241,313

7.82%

45,122,790

7.80%

(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

198,266

1.8591 GBP

3 1/3p ordinary

Purchase

57,308

1.8507 GBP

3 1/3p ordinary

Purchase

36,356

1.8494 GBP

3 1/3p ordinary

Purchase

31,348

1.8583 GBP

3 1/3p ordinary

Purchase

30,657

1.8506 GBP

3 1/3p ordinary

Purchase

16,745

1.8600 GBP

3 1/3p ordinary

Purchase

10,326

1.8496 GBP

3 1/3p ordinary

Purchase

8,397

1.8602 GBP

3 1/3p ordinary

Purchase

5,932

1.8515 GBP

3 1/3p ordinary

Purchase

5,464

1.8546 GBP

3 1/3p ordinary

Purchase

3,649

1.8513 GBP

3 1/3p ordinary

Purchase

2,856

1.8558 GBP

3 1/3p ordinary

Purchase

2,470

1.8531 GBP

3 1/3p ordinary

Purchase

1,871

1.8492 GBP

3 1/3p ordinary

Purchase

1,516

1.8521 GBP

3 1/3p ordinary

Purchase

1,210

1.8530 GBP

3 1/3p ordinary

Purchase

1,170

1.8598 GBP

3 1/3p ordinary

Purchase

1,052

1.8485 GBP

3 1/3p ordinary

Purchase

975

1.8508 GBP

3 1/3p ordinary

Purchase

806

1.8545 GBP

3 1/3p ordinary

Purchase

780

1.8490 GBP

3 1/3p ordinary

Purchase

762

1.8518 GBP

3 1/3p ordinary

Purchase

679

1.8495 GBP

3 1/3p ordinary

Purchase

429

1.8480 GBP

3 1/3p ordinary

Purchase

396

1.8450 GBP

3 1/3p ordinary

Purchase

396

1.8448 GBP

3 1/3p ordinary

Purchase

329

1.8520 GBP

3 1/3p ordinary

Sale

133,138

1.8600 GBP

3 1/3p ordinary

Sale

121,044

1.8587 GBP

3 1/3p ordinary

Sale

29,843

1.8506 GBP

3 1/3p ordinary

Sale

23,633

1.8597 GBP

3 1/3p ordinary

Sale

11,509

1.8514 GBP

3 1/3p ordinary

Sale

7,786

1.8493 GBP

3 1/3p ordinary

Sale

6,768

1.8519 GBP

3 1/3p ordinary

Sale

4,327

1.8490 GBP

3 1/3p ordinary

Sale

3,367

1.8527 GBP

3 1/3p ordinary

Sale

3,029

1.8522 GBP

3 1/3p ordinary

Sale

832

1.8479 GBP

3 1/3p ordinary

Sale

823

1.8495 GBP

3 1/3p ordinary

Sale

780

1.8491 GBP

3 1/3p ordinary

Sale

685

1.8500 GBP

3 1/3p ordinary

Sale

396

1.8450 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

7,786

1.8493 GBP

3 1/3p ordinary

SWAP

Decreasing Short

100

1.8499 GBP

3 1/3p ordinary

SWAP

Decreasing Short

130

1.8505 GBP

3 1/3p ordinary

SWAP

Decreasing Short

3,367

1.8527 GBP

3 1/3p ordinary

SWAP

Decreasing Short

74,856

1.8556 GBP

3 1/3p ordinary

SWAP

Decreasing Short

89,728

1.8561 GBP

3 1/3p ordinary

SWAP

Decreasing Short

84

1.8600 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,898

1.8442 GBP

3 1/3p ordinary

SWAP

Increasing Short

496

1.8453 GBP

3 1/3p ordinary

SWAP

Increasing Short

4,024

1.8493 GBP

3 1/3p ordinary

SWAP

Increasing Short

36,356

1.8494 GBP

3 1/3p ordinary

SWAP

Increasing Short

10,326

1.8496 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,109

1.8501 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,325

1.8505 GBP

3 1/3p ordinary

SWAP

Increasing Short

34,943

1.8506 GBP

3 1/3p ordinary

SWAP

Increasing Short

57,932

1.8507 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,516

1.8521 GBP

3 1/3p ordinary

SWAP

Increasing Short

4,220

1.8527 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,470

1.8531 GBP

3 1/3p ordinary

SWAP

Increasing Short

3

1.8550 GBP

3 1/3p ordinary

SWAP

Increasing Short

5,402

1.8571 GBP

3 1/3p ordinary

SWAP

Increasing Short

25,946

1.8586 GBP

3 1/3p ordinary

SWAP

Increasing Short

50,634

1.8600 GBP

3 1/3p ordinary

SWAP

Increasing Short

8,397

1.8602 GBP

3 1/3p ordinary

CFD

Decreasing Short

23,184

1.8598 GBP

3 1/3p ordinary

CFD

Increasing Short

734

1.8461 GBP

3 1/3p ordinary

CFD

Increasing Short

4,976

1.8526 GBP

3 1/3p ordinary

CFD

Increasing Short

9,274

1.8535 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:

06 Feb 2025

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213