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:

20 Sep 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:

36,926,000

6.38%

475,140

0.08%

(2)

Cash-settled derivatives:

and/or controlled:

182,197

0.03%

35,224,859

6.09%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

37,108,197

6.41%

35,699,999

6.17%

(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

506,756

1.7115 GBP

3 1/3p ordinary

Purchase

327,344

1.7100 GBP

3 1/3p ordinary

Purchase

317,154

1.7160 GBP

3 1/3p ordinary

Purchase

213,087

1.7108 GBP

3 1/3p ordinary

Purchase

200,000

1.7408 GBP

3 1/3p ordinary

Purchase

200,000

1.7508 GBP

3 1/3p ordinary

Purchase

157,594

1.7446 GBP

3 1/3p ordinary

Purchase

124,115

1.7559 GBP

3 1/3p ordinary

Purchase

71,355

1.7427 GBP

3 1/3p ordinary

Purchase

71,260

1.7455 GBP

3 1/3p ordinary

Purchase

60,671

1.7550 GBP

3 1/3p ordinary

Purchase

50,000

1.7305 GBP

3 1/3p ordinary

Purchase

47,434

1.7521 GBP

3 1/3p ordinary

Purchase

31,900

1.7464 GBP

3 1/3p ordinary

Purchase

30,217

1.7313 GBP

3 1/3p ordinary

Purchase

22,044

1.7520 GBP

3 1/3p ordinary

Purchase

16,165

1.7308 GBP

3 1/3p ordinary

Purchase

12,259

1.7283 GBP

3 1/3p ordinary

Purchase

11,918

1.7473 GBP

3 1/3p ordinary

Purchase

8,235

1.7513 GBP

3 1/3p ordinary

Purchase

7,252

1.7459 GBP

3 1/3p ordinary

Purchase

7,143

1.7444 GBP

3 1/3p ordinary

Purchase

7,096

1.7099 GBP

3 1/3p ordinary

Purchase

5,779

1.7405 GBP

3 1/3p ordinary

Purchase

5,676

1.7353 GBP

3 1/3p ordinary

Purchase

4,194

1.7501 GBP

3 1/3p ordinary

Purchase

3,699

1.7140 GBP

3 1/3p ordinary

Purchase

3,076

1.7529 GBP

3 1/3p ordinary

Purchase

1,856

1.7476 GBP

3 1/3p ordinary

Purchase

1,441

1.7475 GBP

3 1/3p ordinary

Purchase

648

1.7402 GBP

3 1/3p ordinary

Purchase

100

1.7590 GBP

3 1/3p ordinary

Purchase

3

1.7533 GBP

3 1/3p ordinary

Sale

450,000

1.7291 GBP

3 1/3p ordinary

Sale

149,838

1.7101 GBP

3 1/3p ordinary

Sale

89,391

1.7100 GBP

3 1/3p ordinary

Sale

58,858

1.7412 GBP

3 1/3p ordinary

Sale

47,683

1.7370 GBP

3 1/3p ordinary

Sale

32,117

1.7262 GBP

3 1/3p ordinary

Sale

15,800

1.7104 GBP

3 1/3p ordinary

Sale

3,699

1.7140 GBP

3 1/3p ordinary

Sale

3,600

1.7205 GBP

3 1/3p ordinary

Sale

3,076

1.7530 GBP

3 1/3p ordinary

Sale

2,690

1.7459 GBP

3 1/3p ordinary

Sale

2,100

1.7388 GBP

3 1/3p ordinary

Sale

1,596

1.7348 GBP

3 1/3p ordinary

Sale

1,164

1.7255 GBP

3 1/3p ordinary

Sale

294

1.7420 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

4,501

1.7312 GBP

3 1/3p ordinary

SWAP

Decreasing Short

50

1.7100 GBP

3 1/3p ordinary

SWAP

Decreasing Short

15,800

1.7104 GBP

3 1/3p ordinary

SWAP

Decreasing Short

8,900

1.7173 GBP

3 1/3p ordinary

SWAP

Decreasing Short

32,117

1.7262 GBP

3 1/3p ordinary

SWAP

Decreasing Short

2,100

1.7388 GBP

3 1/3p ordinary

SWAP

Decreasing Short

41,676

1.7404 GBP

3 1/3p ordinary

SWAP

Decreasing Short

18,608

1.7413 GBP

3 1/3p ordinary

SWAP

Increasing Short

141,236

1.7100 GBP

3 1/3p ordinary

SWAP

Increasing Short

213,087

1.7108 GBP

3 1/3p ordinary

SWAP

Increasing Short

217,329

1.7117 GBP

3 1/3p ordinary

SWAP

Increasing Short

533

1.7224 GBP

3 1/3p ordinary

SWAP

Increasing Short

30,217

1.7313 GBP

3 1/3p ordinary

SWAP

Increasing Short

7,480

1.7337 GBP

3 1/3p ordinary

SWAP

Increasing Short

5,676

1.7353 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,629

1.7354 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,500

1.7446 GBP

3 1/3p ordinary

SWAP

Increasing Short

71,260

1.7455 GBP

3 1/3p ordinary

SWAP

Increasing Short

7,252

1.7459 GBP

3 1/3p ordinary

SWAP

Increasing Short

31,900

1.7464 GBP

3 1/3p ordinary

SWAP

Increasing Short

15,471

1.7470 GBP

3 1/3p ordinary

SWAP

Increasing Short

4,194

1.7501 GBP

3 1/3p ordinary

SWAP

Increasing Short

3

1.7544 GBP

3 1/3p ordinary

SWAP

Increasing Short

124,115

1.7559 GBP

3 1/3p ordinary

CFD

Decreasing Short

55,533

1.7100 GBP

3 1/3p ordinary

CFD

Decreasing Short

3,111

1.7238 GBP

3 1/3p ordinary

CFD

Increasing Short

55,533

1.7100 GBP

3 1/3p ordinary

CFD

Increasing Short

3,577

1.7182 GBP

3 1/3p ordinary

CFD

Increasing Short

2,864

1.7575 GBP

3 1/3p ordinary

SWAP

Opening Short

50,000

1.7305 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 Sep 2024

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213