AIB Group Plc

Major Shareholding Notification • Dec 10, 2025

Standard Form TR-1

Standard form for notification of major holdings

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

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

AIB Group Public Limited Company

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):

3. Details of person subject to the notification obligation:

Name:

Wellington Management Group LLP

City and country of registered office (if applicable): c/o Wellington Management Company LLP, 280 Congress Street, Boston, MA 02210 USA

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

BP2S London

BNY Custodial Nominees (Ireland) Ltd.

BONY (Nominees) Ltd.

Brown Brothers Harriman

Citibank NA

Chase Nominees Ltd.

Goldman Sachs Securities (Nominees)

Ltd.

Nortrust Nominees Limited

Morgan Nominees Limited

ROY Nominees Limited

State Street Nominees Ltd.

USBK William Blair Wellington

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

09 Dec 2025

6. Date on which issuer notified:

10 Dec 2025

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

4%

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 issuer
Resulting situation on the date on which threshold was crossed or reached	3.97%	0.08%	4.05%	2,136,766,718
Position of previous notification (if applicable)	4.01%	0.04%	4.05%

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

A: Voting rights attached to shares

Class/type of	Number of voting rights		% of voting rights
shares ISIN code (if possible)	Direct	Indirect	Direct	Indirect
IE00BF0L3536 Common Stock		84,983,703		3.97%
SUBTOTAL A		84,983,703		3.97%

B 1: Financial Instruments according to Regulation 17(1)(a) of the Regulations
Type of financial instrument	Expiration date	Exercise/ Conversion Period	Number of voting rights that may be acquired if the instrument is exercised/converted	% of voting rights
Depository Receipt			57 Depository Receipt shares or 114 votes on a converted basis	0.00%
		SUBTOTAL B.1	114	0.00%

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

Type of financial instrument	Expiration date	Exercise/ Conversion Period	Physical or cash settlement	Number of voting rights	% of voting rights
Equity Swap	15 May 2033	15 May 2033	Cash settlement	1,290,812 Equity Swap shares or 1,290,812 votes on a	0.06%

				converted basis
Equity Swap	31 May 2033	31 May 2033	Cash settlement	175,019 Equity Swap shares or 175,019 votes on a converted basis	0.01%
Equity Swap	30 May 2028	30 May 2028	Cash settlement	174,986 Equity Swap shares or 174,986 votes on a converted basis	0.01%
Equity Swap	05 May 2028	05 May 2028	Cash settlement	77,568 Equity Swap shares or 77,568 votes on a converted basis	0.00%
Equity Swap	20 May 2033	20 May 2033	Cash settlement	11,548 Equity Swap shares or 11,548 votes on a converted basis	0.00%
			SUBTOTAL B.2	1,729,933	0.08%

• 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.
• [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 entity:

Name	% 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
Wellington Management Group LLP	3.97%		4.05%
Wellington Group Holdings LLP	3.97%		4.05%
Wellington Investment Advisors Holdings LLP	3.97%		4.05%
Wellington Management Company LLP
Wellington Management Group LLP	3.97%		4.05%
Wellington Group Holdings LLP	3.97%		4.05%
Wellington Investment Advisors Holdings LLP	3.97%		4.05%
Wellington Management Global Holdings, Ltd.
Wellington Management International Ltd

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

12. Additional information:

Done in London on 10 Dec 2025.