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 relevant securities this form relates:

SPIRENT COMMUNICATIONS PLC

(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:

02 May 2025

(f)

In addition to the company in 1(c) above, is the discloser making disclosures in respect of any other party to the offer?

NO

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:

42,145,443

7.25%

2,356,016

0.40%

(2) Cash-settled derivatives:

1,631,971

0.28%

41,687,786

7.17%

(3) Stock-settled derivatives (including options) and agreements to purchase/sell: 

0

0.00%

0

0.00%

TOTAL: 

43,777,414

7.53%

44,043,802

7.57%

(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 PERSON MAKING THE DISCLOSURE

(a)

Purchase and sales

Class of relevant security

Purchase/sale

Number of securities

Price per unit

3 1/3p ordinary

Purchase

96,514

1.8628 GBP

3 1/3p ordinary

Purchase

92,083

1.8591 GBP

3 1/3p ordinary

Purchase

110,779

1.8658 GBP

3 1/3p ordinary

Purchase

59,456

1.8489 GBP

3 1/3p ordinary

Purchase

44,510

1.8729 GBP

3 1/3p ordinary

Purchase

35,845

1.8682 GBP

3 1/3p ordinary

Purchase

35,543

1.8703 GBP

3 1/3p ordinary

Purchase

24,611

1.8658 GBP

3 1/3p ordinary

Purchase

12,358

1.8440 GBP

3 1/3p ordinary

Purchase

10,064

1.8484 GBP

3 1/3p ordinary

Purchase

9,865

1.8559 GBP

3 1/3p ordinary

Purchase

4,136

1.8672 GBP

3 1/3p ordinary

Purchase

3,239

1.8686 GBP

3 1/3p ordinary

Purchase

3,096

1.8620 GBP

3 1/3p ordinary

Purchase

3,089

1.8441 GBP

3 1/3p ordinary

Purchase

2,844

1.8600 GBP

3 1/3p ordinary

Purchase

2,617

1.8740 GBP

3 1/3p ordinary

Purchase

1,683

1.8711 GBP

3 1/3p ordinary

Purchase

1,648

1.8653 GBP

3 1/3p ordinary

Purchase

1,358

1.8717 GBP

3 1/3p ordinary

Purchase

1,262

1.8720 GBP

3 1/3p ordinary

Purchase

590

1.8654 GBP

3 1/3p ordinary

Purchase

573

1.8780 GBP

3 1/3p ordinary

Purchase

530

1.8640 GBP

3 1/3p ordinary

Purchase

432

1.8700 GBP

3 1/3p ordinary

Purchase

361

1.8487 GBP

3 1/3p ordinary

Purchase

318

1.8730 GBP

3 1/3p ordinary

Purchase

151

1.8480 GBP

3 1/3p ordinary

Purchase

86

1.8710 GBP

3 1/3p ordinary

Sale

490,339

1.8668 GBP

3 1/3p ordinary

Sale

75,878

1.8440 GBP

3 1/3p ordinary

Sale

18,192

1.8652 GBP

3 1/3p ordinary

Sale

8,043

1.8633 GBP

3 1/3p ordinary

Sale

2,194

1.8509 GBP

3 1/3p ordinary

Sale

2,092

1.8741 GBP

3 1/3p ordinary

Sale

1,489

1.8686 GBP

3 1/3p ordinary

Sale

1,021

1.8696 GBP

3 1/3p ordinary

Sale

821

1.8620 GBP

3 1/3p ordinary

Sale

746

1.8603 GBP

3 1/3p ordinary

Sale

573

1.8781 GBP

3 1/3p ordinary

Sale

530

1.8640 GBP

3 1/3p ordinary

Sale

527

1.8720 GBP

3 1/3p ordinary

Sale

508

1.8690 GBP

3 1/3p ordinary

Sale

508

1.8480 GBP

3 1/3p ordinary

Sale

432

1.8700 GBP

3 1/3p ordinary

Sale

173

1.8660 GBP

3 1/3p ordinary

Sale

86

1.8711 GBP

(b)

Cash-settled derivative transactions

Class of relevant security

Product description

Nature of dealing

Number of reference securities

Price per unit

3 1/3p ordinary

SWAP

Decreasing Short

44,481

1.8440 GBP

3 1/3p ordinary

SWAP

Decreasing Short

248

1.8478 GBP

3 1/3p ordinary

SWAP

Decreasing Short

746

1.8603 GBP

3 1/3p ordinary

SWAP

Decreasing Short

13,878

1.8651 GBP

3 1/3p ordinary

SWAP

Decreasing Short

3,017

1.8662 GBP

3 1/3p ordinary

SWAP

Decreasing Short

490,339

1.8668 GBP

3 1/3p ordinary

SWAP

Decreasing Short

1,049

1.8677 GBP

3 1/3p ordinary

SWAP

Increasing Short

36,334

1.8440 GBP

3 1/3p ordinary

SWAP

Increasing Short

3,089

1.8441 GBP

3 1/3p ordinary

SWAP

Increasing Short

59,456

1.8488 GBP

3 1/3p ordinary

SWAP

Increasing Short

9,424

1.8541 GBP

3 1/3p ordinary

SWAP

Increasing Short

9,865

1.8559 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,673

1.8620 GBP

3 1/3p ordinary

SWAP

Increasing Short

76,214

1.8628 GBP

3 1/3p ordinary

SWAP

Increasing Short

3,658

1.8630 GBP

3 1/3p ordinary

SWAP

Increasing Short

24,611

1.8658 GBP

3 1/3p ordinary

SWAP

Increasing Short

35,845

1.8682 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,360

1.8698 GBP

3 1/3p ordinary

SWAP

Increasing Short

35,543

1.8703 GBP

3 1/3p ordinary

SWAP

Increasing Short

44,510

1.8729 GBP

3 1/3p ordinary

SWAP

Increasing Short

525

1.8740 GBP

3 1/3p ordinary

CFD

Increasing Short

2,103

1.8601 GBP

3 1/3p ordinary

CFD

Increasing Short

20,300

1.8628 GBP

3 1/3p ordinary

CFD

Increasing Short

45,487

1.8668 GBP

(c)

Stock-settled derivative transactions (including options)

(i)

Writing, selling, purchasing or varying

Class of relevant security

Product description

Writing, purchasing, selling, varying etc

Number of securities to which option relates

Exercise price per unit

Type

Expiry date

Option money paid/ received per unit

(ii)

Exercising

Class of relevant security

Product description

Exercising/ exercised against

Number of securities

Exercise price per unit

(d)

Other dealings (including subscribing for new securities)

Class of relevant security

Nature of Dealings

Details

Price per unit (if 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 person 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-May-25

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213