Aib Group Regulatory News (AIBG)

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attachedii: AIB 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: Principal Global Investors, LLC

City and country of registered office (if applicable):

Des Moines, Iowa (United States)

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

5. Date on which the threshold was crossed or reachedvi: 04 November 2025

6. Date on which issuer notified: 06 November 2025

7. Threshold(s) that is/are crossed or reached: 5% of Regulatory requirement under the Transparency Regulations 2007

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

5.01%

0%

5.01%

2,136,766,718

Position of previous notification (if applicable)

4.98%

0%

4.98%

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 of shares

ISIN code (if possible)

Number of voting rightsix

% of voting rights

Direct

Indirect

Direct

Indirect

Ordinary Shares (ISIN:

IE00BF0L3536)

0

107,117,411

0

5.01%

SUBTOTAL A

107,117,411

5.01%

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

Type of financial instrument

Expiration datex

Exercise/ Conversion Periodxi

Number of voting rights that may be acquired if the instrument is

exercised/converted.

% of voting rights

N/A

N/A

N/A

N/A

N/A

SUBTOTAL B.1

N/A

N/A

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

Type of financial instrument

Expiration datex

Exercise/

Conversion Period xi

Physical or

cash settlementxii

Number of voting rights

% of voting rights

N/A

N/A

N/A

N/A

N/A

N/A

SUBTOTAL B.2

N/A

N/A

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

Principal Financial Group

Principal Financial Services Inc.

Principal Global Investors Holding Company (US) LLC

Principal Global Investors, LLC

5.01%

  1%