Form 8.3 SPIRENT COMMUNICATIONS PLC

FORM 8.3

Amendment - this form replaces RNS number 9533E published at 15:15 on 14/04/2025 changes made to section 2a and 3a

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 Apr 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:

41,916,309

7.21%

3,182,601

0.54%

(2)

Cash-settled derivatives:

and/or controlled:

1,768,337

0.30%

41,614,208

7.16%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

43,684,646

7.52%

44,796,809

7.70%

(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

75,834

1.7728 GBP

3 1/3p ordinary

Purchase

49,778

1.7688 GBP

3 1/3p ordinary

Purchase

11,103

1.7566 GBP

3 1/3p ordinary

Purchase

10,548

1.7800 GBP

3 1/3p ordinary

Purchase

9,716

1.7616 GBP

3 1/3p ordinary

Purchase

8,274

1.7679 GBP

3 1/3p ordinary

Purchase

6,887

1.7509 GBP

3 1/3p ordinary

Purchase

6,375

1.7700 GBP

3 1/3p ordinary

Purchase

2,701

1.7759 GBP

3 1/3p ordinary

Purchase

2,508

1.7550 GBP

3 1/3p ordinary

Purchase

2,106

1.7780 GBP

3 1/3p ordinary

Purchase

1,319

1.7460 GBP

3 1/3p ordinary

Purchase

1,283

1.7564 GBP

3 1/3p ordinary

Purchase

1,097

1.7760 GBP

3 1/3p ordinary

Purchase

455

1.7670 GBP

3 1/3p ordinary

Purchase

404

1.7459 GBP

3 1/3p ordinary

Purchase

396

1.7539 GBP

3 1/3p ordinary

Purchase

394

1.7500 GBP

3 1/3p ordinary

Purchase

360

1.7420 GBP

3 1/3p ordinary

Sale

500,000

1.6668 GBP

3 1/3p ordinary

Sale

100,000

1.7791 GBP

3 1/3p ordinary

Sale

75,724

1.7658 GBP

3 1/3p ordinary

Sale

73,892

1.7648 GBP

3 1/3p ordinary

Sale

19,896

1.7700 GBP

3 1/3p ordinary

Sale

13,173

1.7655 GBP

3 1/3p ordinary

Sale

10,350

1.7800 GBP

3 1/3p ordinary

Sale

9,716

1.7615 GBP

3 1/3p ordinary

Sale

8,718

1.7591 GBP

3 1/3p ordinary

Sale

8,382

1.7684 GBP

3 1/3p ordinary

Sale

6,872

1.7707 GBP

3 1/3p ordinary

Sale

6,196

1.7603 GBP

3 1/3p ordinary

Sale

5,900

1.7631 GBP

3 1/3p ordinary

Sale

3,296

1.7431 GBP

3 1/3p ordinary

Sale

2,224

1.7629 GBP

3 1/3p ordinary

Sale

2,182

1.7752 GBP

3 1/3p ordinary

Sale

691

1.7559 GBP

3 1/3p ordinary

Sale

487

1.7300 GBP

3 1/3p ordinary

Sale

67

1.7500 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

500,000

1.7187 GBP

3 1/3p ordinary

SWAP

Decreasing Short

16,617

1.7473 GBP

3 1/3p ordinary

SWAP

Decreasing Short

691

1.7559 GBP

3 1/3p ordinary

SWAP

Decreasing Short

6,196

1.7603 GBP

3 1/3p ordinary

SWAP

Decreasing Short

5,900

1.7631 GBP

3 1/3p ordinary

SWAP

Decreasing Short

13,173

1.7655 GBP

3 1/3p ordinary

SWAP

Decreasing Short

75,724

1.7658 GBP

3 1/3p ordinary

SWAP

Decreasing Short

8,382

1.7684 GBP

3 1/3p ordinary

SWAP

Decreasing Short

33,573

1.7700 GBP

3 1/3p ordinary

SWAP

Decreasing Short

14,889

1.7714 GBP

3 1/3p ordinary

SWAP

Decreasing Short

11,675

1.7716 GBP

3 1/3p ordinary

SWAP

Decreasing Short

2,182

1.7752 GBP

3 1/3p ordinary

SWAP

Decreasing Short

100,000

1.7791 GBP

3 1/3p ordinary

SWAP

Increasing Short

200

1.7380 GBP

3 1/3p ordinary

SWAP

Increasing Short

404

1.7460 GBP

3 1/3p ordinary

SWAP

Increasing Short

6,887

1.7509 GBP

3 1/3p ordinary

SWAP

Increasing Short

396

1.7540 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,508

1.7550 GBP

3 1/3p ordinary

SWAP

Increasing Short

11,103

1.7566 GBP

3 1/3p ordinary

SWAP

Increasing Short

12,606

1.7653 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,837

1.7700 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,499

1.7701 GBP

3 1/3p ordinary

SWAP

Increasing Short

75,834

1.7728 GBP

3 1/3p ordinary

SWAP

Increasing Short

6,017

1.7734 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,701

1.7759 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,097

1.7760 GBP

3 1/3p ordinary

SWAP

Increasing Short

5,577

1.7790 GBP

3 1/3p ordinary

CFD

Increasing Short

2,595

1.7661 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:

23 Apr 2025

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213