Cairn Homes Plc: 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:

CAIRN HOMES PLC

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

[ ] An acquisition or disposal of voting rights

[ ] An acquisition or disposal of financial instruments

[ ] An event changing the breakdown of voting rights

[ X ] Other (please specify)iii: Group restructure following the acquisition of Global Infrastructure Management LLC (“GIP”)

3. Details of person subject to the notification obligationiv :

Name:

BlackRock, Inc.

City and country of registered office (if applicable):

Wilmington, DE, U.S.A.

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

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

01/10/2024

6. Date on which issuer notified:

02/10/2024

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

Group restructure following the acquisition of Global Infrastructure Management LLC (“GIP”)

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

3.14%

1.47%

4.62%

630,913,979

Position of previous notification (if applicable)

3.06%

1.34%

4.41%

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 the
financial 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

See attachment

11. In case of proxy voting: [name of the proxy holder] will cease to hold [% and number] voting rights as of [date]

12. Additional informationxvi:

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

BlackRock, Inc.

BlackRock Finance, Inc.

BlackRock Holdco 2, Inc.

BlackRock Financial Management, Inc.

BlackRock International Holdings, Inc.

BR Jersey International Holdings L.P.

BlackRock Holdco 3, LLC