AIB Group Plc

Major Shareholding Notification • Dec 15, 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)i

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: 11 December 2025
6. Date on which issuer notified: 15 December 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	4.99%	0%	4.99%	2,136,766,718
Position of previous notification (if applicable)	5.01%	0%	5.01%

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	106,810,986	0	4.99%
SUBTOTAL A	106,810,986		4.99%

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	4.99%		4.99%

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:

Principal Global Investors, LLC ("PGI") is an investment adviser registered with the U.S. Securities and Exchange Commission under the U.S. Investment Advisers Act of 1940. Principal Financial Group is the parent entity for a group of investment management companies, the chain of which is set out above (in section 10) and includes Principal Global Investors LLC, which is acting on behalf of various clients. Some of these clients, pursuant to advisory contracts, provide the power to PGI to vote their shares at its own discretion (i.e. without specific written instructions). The shares reported on this notification are owned by accounts under the investment management of PGI.