Holding(s) in Company

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

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

Glanbia plc, an Irish incorporated Company, with a Stock Exchange Listing on Euronext Dublin and a premium listing in the UK.

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:

Increase in percentage holding as a result of concentration from a share buy-back programme undertaken by Glanbia plc.

3. Details of person subject to the notification obligationiv :

Name:

Tirlán Co-operative Society Limited (formerly named Glanbia Co-operative Society Limited)

City and country of registered office (if applicable):

Tirlán Abbey Quarter Kilkenny, R95 DXR1 Ireland

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

Tirlán Co-operative Society Limited (formerly named Glanbia Co-operative Society Limited)

Euroclear Nominees Limited

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

9 October 2024

6. Date on which issuer notified:

9 October 2024

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

Above 29%

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

29.004%

0%

29.004%

29.004% of a total issued share capital of 260,438,736

Position of previous notification (if applicable)

28.00%

0%

28.00%

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

IE0000669501

75,537,305

0

29.004%

0%

SUBTOTAL A

75,537,305

0

29.004%

0

B 1: Financial Instruments according to Regulation 17(1)(a) of the Regulations/ DTR5.3.1R (1) (b)

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

SUBTOTAL B.1

B 2: Financial Instruments with similar economic effect according to Regulation 17(1)(b) of the Regulations/ DTR5.3.1R (1) (b)

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):

[X] 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

[ ] 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

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:

The above interest has been calculated using the issued share capital of the Issuer per the RNS announcement issued on Wednesday, 9 October 2024 (260,438,736).