Form 8.3 - AVAST PLC

(a) Full name of discloser:

Barclays PLC.

(b) Owner or controller of interests and short positions disclosed, if different from 1(a):

The naming of nominee or vehicle companies is insufficient. For a trust, the trustee(s), settlor and beneficiaries must be named.

(c) Name of offeror/offeree in relation to whose relevant securities this form relates:

Use a separate form for each offeror/offeree

AVAST 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:

For an opening position disclosure, state the latest practicable date prior to the disclosure

16 FEB 2022

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

If it is a cash offer or possible cash offer, state “N/A”

YES NORTONLIFELOCK INC

(1)

42,563,900

4.09%

323,936

0.03%

(2)

87,725

0.01%

35,688,347

3.43%

(3)

0

0.00%

0

0.00%

(4)

42,651,625

4.10%

36,012,283

3.46%

Class of relevant security in relation to which subscription right exists:

Details, including nature of the rights concerned and relevant percentages:

142

485

526

599

681

722

954

994

1,000

1,084

1,119

1,130

1,131

1,345

1,451

1,530

1,546

1,594

1,679

1,778

2,793

3,060

3,113

3,393

3,829

3,941

4,141

5,214

7,285

10,297

11,392

12,836

13,978

23,873

24,580

38,621

62,407

64,211

104,015

136,812

366,674

371

485

526

681

722

954

1,069

1,131

1,238

1,379

1,451

1,546

1,594

1,778

2,068

2,093

2,577

3,439

4,313

4,766

5,642

5,891

6,172

7,354

15,852

24,633

25,780

184,440

1,069

1,109

1,465

2,425

3,596

7,953

14,087

15,144

18,358

26,600

57,929

607

3,393

5,467

9,036

9,216

15,434

30,580

30,968

31,792

32,419

33,033

35,380

49,538

82,928

180,833

195,100

Class of relevant security

Product description e.g. call option

Writing, purchasing, selling, varying etc.

Number of securities to which option relates

Exercise price per unit

Type

e.g. American, European etc.

Expiry date

Option money paid/ received per unit

Class of relevant security

Product description

e.g. call option

Exercising/ exercised against

Number of securities

Exercise price per unit

Class of relevant security

Nature of dealing

e.g. subscription, conversion

Details

Price per unit (if applicable)

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:

Irrevocable commitments and letters of intent should not be included. If there are no such agreements, arrangements or understandings, state “none”

None

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 or future acquisition or disposal of any relevant securities to which any derivative is referenced:

If there are no such agreements, arrangements or understandings, state “none”

None

Is a Supplemental Form 8 (Open Positions) attached?

NO

Date of disclosure:

17 FEB 2022

Contact name:

Large Holdings Regulatory Operations

Telephone number*:

020 3134 7213