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:

26 Mar 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:

42,920,810

7.39%

1,082,419

0.19%

(2)

Cash-settled derivatives:

and/or controlled:

362,479

0.06%

42,659,423

7.34%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

43,283,289

7.45%

43,741,842

7.53%

(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

155,123

1.8890 GBP

3 1/3p ordinary

Purchase

55,060

1.8905 GBP

3 1/3p ordinary

Purchase

20,213

1.8891 GBP

3 1/3p ordinary

Purchase

14,250

1.8949 GBP

3 1/3p ordinary

Purchase

14,064

1.8913 GBP

3 1/3p ordinary

Purchase

14,016

1.8925 GBP

3 1/3p ordinary

Purchase

13,739

1.8893 GBP

3 1/3p ordinary

Purchase

9,371

1.8902 GBP

3 1/3p ordinary

Purchase

7,886

1.8945 GBP

3 1/3p ordinary

Purchase

5,210

1.8954 GBP

3 1/3p ordinary

Purchase

4,644

1.8951 GBP

3 1/3p ordinary

Purchase

4,378

1.8952 GBP

3 1/3p ordinary

Purchase

3,762

1.8981 GBP

3 1/3p ordinary

Purchase

3,683

1.8909 GBP

3 1/3p ordinary

Purchase

3,421

1.8938 GBP

3 1/3p ordinary

Purchase

2,662

1.8877 GBP

3 1/3p ordinary

Purchase

2,142

1.8977 GBP

3 1/3p ordinary

Purchase

1,063

1.8900 GBP

3 1/3p ordinary

Purchase

828

1.8975 GBP

3 1/3p ordinary

Purchase

797

1.8978 GBP

3 1/3p ordinary

Purchase

789

1.8920 GBP

3 1/3p ordinary

Purchase

628

1.8873 GBP

3 1/3p ordinary

Purchase

246

1.8950 GBP

3 1/3p ordinary

Sale

49,865

1.8890 GBP

3 1/3p ordinary

Sale

16,464

1.8985 GBP

3 1/3p ordinary

Sale

9,509

1.8916 GBP

3 1/3p ordinary

Sale

9,014

1.8889 GBP

3 1/3p ordinary

Sale

7,793

1.8880 GBP

3 1/3p ordinary

Sale

7,229

1.8879 GBP

3 1/3p ordinary

Sale

6,333

1.8888 GBP

3 1/3p ordinary

Sale

4,828

1.8953 GBP

3 1/3p ordinary

Sale

4,149

1.8937 GBP

3 1/3p ordinary

Sale

3,942

1.8915 GBP

3 1/3p ordinary

Sale

2,256

1.8938 GBP

3 1/3p ordinary

Sale

2,126

1.8900 GBP

3 1/3p ordinary

Sale

1,549

1.8884 GBP

3 1/3p ordinary

Sale

1,129

1.8904 GBP

3 1/3p ordinary

Sale

824

1.8939 GBP

3 1/3p ordinary

Sale

481

1.8941 GBP

3 1/3p ordinary

Sale

46

1.8980 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

Increasing Short

14,137

1.8918 GBP

3 1/3p ordinary

SWAP

Decreasing Short

10,943

1.8879 GBP

3 1/3p ordinary

SWAP

Decreasing Short

4,269

1.8880 GBP

3 1/3p ordinary

SWAP

Decreasing Short

6,324

1.8884 GBP

3 1/3p ordinary

SWAP

Decreasing Short

7,867

1.8886 GBP

3 1/3p ordinary

SWAP

Decreasing Short

6,333

1.8888 GBP

3 1/3p ordinary

SWAP

Decreasing Short

9,014

1.8889 GBP

3 1/3p ordinary

SWAP

Decreasing Short

1,885

1.8890 GBP

3 1/3p ordinary

SWAP

Decreasing Short

1,129

1.8904 GBP

3 1/3p ordinary

SWAP

Decreasing Short

607

1.8912 GBP

3 1/3p ordinary

SWAP

Decreasing Short

824

1.8939 GBP

3 1/3p ordinary

SWAP

Decreasing Short

481

1.8941 GBP

3 1/3p ordinary

SWAP

Decreasing Short

21,026

1.8983 GBP

3 1/3p ordinary

SWAP

Decreasing Short

18

1.9150 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,662

1.8877 GBP

3 1/3p ordinary

SWAP

Increasing Short

92,419

1.8890 GBP

3 1/3p ordinary

SWAP

Increasing Short

20,213

1.8891 GBP

3 1/3p ordinary

SWAP

Increasing Short

13,739

1.8893 GBP

3 1/3p ordinary

SWAP

Increasing Short

51,719

1.8910 GBP

3 1/3p ordinary

SWAP

Increasing Short

3,690

1.8915 GBP

3 1/3p ordinary

SWAP

Increasing Short

8,538

1.8924 GBP

3 1/3p ordinary

SWAP

Increasing Short

14,016

1.8925 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,114

1.8932 GBP

3 1/3p ordinary

SWAP

Increasing Short

10,700

1.8935 GBP

3 1/3p ordinary

SWAP

Increasing Short

454

1.8943 GBP

3 1/3p ordinary

SWAP

Increasing Short

7,886

1.8945 GBP

3 1/3p ordinary

SWAP

Increasing Short

14,250

1.8949 GBP

3 1/3p ordinary

SWAP

Increasing Short

321

1.8952 GBP

3 1/3p ordinary

SWAP

Increasing Short

80

1.8953 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,412

1.8961 GBP

3 1/3p ordinary

SWAP

Increasing Short

3,762

1.8981 GBP

3 1/3p ordinary

CFD

Increasing Short

1,445

1.8889 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:

27 Mar 2025

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213