Holding(s) in Company

NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the Central Bank of Ireland)i

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attachedii:

GRAFTON GROUP PLC

2. Reason for the notification (please tick the appropriate box or boxes):

[X ] An acquisition or disposal of voting rights

[ ] An acquisition or disposal of financial instruments

[ ] An event changing the breakdown of voting rights

[ ] Other (please specify)iii:

3. Details of person subject to the notification obligationiv :

Name:

Aviva plc & its subsidiaries

City and country of registered office (if applicable):

London, England

4. Full name of shareholder(s) (if different from 3.)v:

5. Date on which the threshold was crossed or reachedvi:

11 January 2021

6. Date on which issuer notified:

12 January 2021

7. Threshold(s) that is/are crossed or reached:

3% (Box 9a & 9b)

8. Total positions of person(s) subject to the notification obligation:

% of voting rights attached to shares (total of 9.A)

% of voting rights through financial instruments(total of 9.B.1 + 9.B.2)

Total of both in % (9.A + 9.B)

Total number of voting rights of issuervii

Resulting situation on the date on which threshold was crossed or reached

2.88%

0.16%

3.04%

239,035,567

Position of previous notification (if applicable)

N/A

N/A

N/A

9. Notified details of the resulting situation on the date on which the threshold was crossed or reachedviii:

A: Voting rights attached to shares

Class/type ofshares

ISIN code (if possible)

Number of voting rightsix

% of voting rights

Direct

Indirect

Direct

Indirect

IE00B00MZ448

3,204,698

3,686,059

1.34%

1.54%

SUBTOTAL A

6,890,757

2.88%

B 1: Financial Instruments according to Regulation 17(1)(a) of the Regulations

Type of financial instrument

Expirationdatex

Exercise/Conversion Periodxi

Number of voting rights that may be acquired if the instrument is exercised/converted.

% of voting rights

RIGHT TO RECALL LOANED SHARES

N/A

N/A

390,000

0.16%

SUBTOTAL B.1

390,000

0.16%

B 2: Financial Instruments with similar economic effect according to Regulation 17(1)(b) of the Regulations

Type of financial instrument

Expirationdatex

Exercise/Conversion Period xi

Physical or cash settlementxii

Number of voting rights

% of voting rights

SUBTOTAL B.2

10. Information in relation to the person subject to the notification obligation (please tick the applicable box):

[ ] Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer.xiii

[x ] Full chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held starting with the ultimate controlling natural person or legal entityxiv:

Namexv

% of voting rights if it equals or is higher than the notifiable threshold

% of voting rights through financial instruments if it equals or is higher than the notifiable threshold

Total of both if it equals or is higher than the notifiable threshold

Aviva plc (Parent Company)

3.04%

Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)

3.04%

Aviva Investors Holdings Limited (wholly owned subsidiary of Aviva Group Holdings Limited)

3.04%

Aviva Investors Global Services Limited (wholly owned subsidiary of Aviva Investors Holdings Limited)

3.04%

12. Additional informationxvi:

This notification is prompted by a