Barclays Regulatory News (BARC)

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:

11 Mar 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:

14,669,873

2.54%

463,496

0.08%

(2)

Cash-settled derivatives:

and/or controlled:

392,175

0.07%

14,509,645

2.51%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

15,062,048

2.60%

14,973,141

2.59%

(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

608,199

1.7676 GBP

3 1/3p ordinary

Purchase

58,605

1.7677 GBP

3 1/3p ordinary

Purchase

27,496

1.7684 GBP

3 1/3p ordinary

Purchase

25,349

1.7678 GBP

3 1/3p ordinary

Purchase

24,235

1.7635 GBP

3 1/3p ordinary

Purchase

22,379

1.7708 GBP

3 1/3p ordinary

Purchase

14,194

1.7691 GBP

3 1/3p ordinary

Purchase

11,595

1.7664 GBP

3 1/3p ordinary

Purchase

10,374

1.7750 GBP

3 1/3p ordinary

Purchase

9,893

1.7672 GBP

3 1/3p ordinary

Purchase

8,264

1.7737 GBP

3 1/3p ordinary

Purchase

7,757

1.7697 GBP

3 1/3p ordinary

Purchase

7,686

1.7716 GBP

3 1/3p ordinary

Purchase

5,486

1.7721 GBP

3 1/3p ordinary

Purchase

3,249

1.7700 GBP

3 1/3p ordinary

Purchase

3,227

1.7618 GBP

3 1/3p ordinary

Purchase

2,608

1.7660 GBP

3 1/3p ordinary

Purchase

2,608

1.7659 GBP

3 1/3p ordinary

Purchase

2,360

1.7667 GBP

3 1/3p ordinary

Purchase

1,629

1.7740 GBP

3 1/3p ordinary

Purchase

1,095

1.7748 GBP

3 1/3p ordinary

Purchase

813

1.7610 GBP

3 1/3p ordinary

Purchase

358

1.7725 GBP

3 1/3p ordinary

Purchase

296

1.7730 GBP

3 1/3p ordinary

Purchase

42

1.7749 GBP

3 1/3p ordinary

Purchase

34

1.7690 GBP

3 1/3p ordinary

Sale

287,304

1.7741 GBP

3 1/3p ordinary

Sale

251,210

1.7722 GBP

3 1/3p ordinary

Sale

93,429

1.7750 GBP

3 1/3p ordinary

Sale

72,666

1.7643 GBP

3 1/3p ordinary

Sale

55,607

1.7605 GBP

3 1/3p ordinary

Sale

31,659

1.7668 GBP

3 1/3p ordinary

Sale

19,796

1.7610 GBP

3 1/3p ordinary

Sale

13,691

1.7642 GBP

3 1/3p ordinary

Sale

12,817

1.7748 GBP

3 1/3p ordinary

Sale

8,802

1.7666 GBP

3 1/3p ordinary

Sale

8,353

1.7703 GBP

3 1/3p ordinary

Sale

4,021

1.7740 GBP

3 1/3p ordinary

Sale

3,200

1.7678 GBP

3 1/3p ordinary

Sale

2,608

1.7660 GBP

3 1/3p ordinary

Sale

2,049

1.7655 GBP

3 1/3p ordinary

Sale

1,656

1.7600 GBP

3 1/3p ordinary

Sale

1,405

1.7690 GBP

3 1/3p ordinary

Sale

358

1.7726 GBP

3 1/3p ordinary

Sale

296

1.7730 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 Long

34

1.7690 GBP

3 1/3p ordinary

SWAP

Decreasing Long

196

1.7610 GBP

3 1/3p ordinary

CFD

Decreasing Long

10,112

1.7750 GBP

3 1/3p ordinary

CFD

Decreasing Long

16,383

1.7691 GBP

3 1/3p ordinary

CFD

Decreasing Long

22,379

1.7708 GBP

3 1/3p ordinary

SWAP

Decreasing Short

1,634

1.7698 GBP

3 1/3p ordinary

SWAP

Decreasing Short

2,049

1.7655 GBP

3 1/3p ordinary

SWAP

Decreasing Short

3,200

1.7678 GBP

3 1/3p ordinary

SWAP

Decreasing Short

4,359

1.7699 GBP

3 1/3p ordinary

SWAP

Decreasing Short

19,723

1.7650 GBP

3 1/3p ordinary

SWAP

Decreasing Short

20,738

1.7684 GBP

3 1/3p ordinary

SWAP

Decreasing Short

36,820

1.7692 GBP

3 1/3p ordinary

SWAP

Decreasing Short

50,015

1.7605 GBP

3 1/3p ordinary

SWAP

Decreasing Short

72,666

1.7643 GBP

3 1/3p ordinary

SWAP

Decreasing Short

244,091

1.7750 GBP

3 1/3p ordinary

CFD

Increasing Long

5,621

1.7709 GBP

3 1/3p ordinary

CFD

Increasing Long

32,491

1.7750 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,629

1.7740 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,677

1.7700 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,608

1.7660 GBP

3 1/3p ordinary

SWAP

Increasing Short

3,227

1.7618 GBP

3 1/3p ordinary

SWAP

Increasing Short

7,757

1.7697 GBP

3 1/3p ordinary

SWAP

Increasing Short

87,473

1.7713 GBP

3 1/3p ordinary

SWAP

Increasing Short

89,891

1.7714 GBP

3 1/3p ordinary

SWAP

Increasing Short

250,000

1.7601 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:

12 Mar 2024

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213