EX-99.1 2 ex991changeinsubstantial.htm EX-99.1
James Hardie Industries plc 1st Floor, Block A, One Park Place, Upper Hatch Street, Dublin 2, D02 FD79, Ireland T: +353 (0) 1 411 6924 F: +353 (0) 1 479 1128 James Hardie Industries plc is a limited liability company incorporated in Ireland with its registered office at 1st Floor, Block A, One Park Place, Upper Hatch Street, Dublin 2, D02 FD79, Ireland. Directors: Anne Lloyd (Chairperson, USA), Peter-John Davis (Aus), Howard Heckes (USA), Gary Hendrickson (USA), Persio Lisboa (USA), Renee Peterson (USA), John Pfeifer (USA), Rada Rodriguez (Sweden), Suzanne B. Rowland (USA), Jesse Singh (USA), Nigel Stein (UK). Chief Executive Officer and Director: Aaron Erter (USA) Company number: 485719 ARBN: 097 829 895 28 October 2025 The Manager Company Announcements Office Australian Securities Exchange Limited 20 Bridge Street SYDNEY NSW 2000 Dear Sir/Madam Substantial Holding Notice As required under ASX Listing Rule 3.17.3 please see attached copy of the substantial holding notice received by James Hardie Industries plc on 27 October 2025. Regards Aoife Rockett Company Secretary This announcement has been authorised for release by the Company Secretary, Ms Aoife Rockett.

Standard Form TR-1 Standard form for notification of major holdings 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 obligation iv : Name: City and country of registered office (if applicable): 4. Full name of shareholder(s) (if different from 3.) v: 8. Total positions of person(s) subject to the notification obligation: A: Voting rights attached to shares Class/type of JAMES HARDIE INDUSTRIES plc shares ISIN CODE (if possible) 0.22% 2.78% Position of previous notification (if applicable) Indirect % of voting rights through financial instruments (total of 9.B.1 + 9.B.2) 7. Threshold(s) that is/are crossed or reached: IE000R94NGM2 AU000000JHX1 STATE STREET GLOBAL ADVISORS TRUST COMPANY 579,252,286 5. Date on which the threshold was crossed or reached vi: 20-Oct-2025 STATE STREET GLOBAL ADVISORS EUROPE LIMITED STATE STREET GLOBAL ADVISORS, LTD. 17,382,480 Direct Number of voting rights ix 2.88% Above 3.00% 27-Oct-2025 NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the Central Bank of Ireland) i Ordinary Total of both in % (9.A + 9.B) 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached ii: BOSTON, US 9. Notified details of the resulting situation on the date on which the threshold was crossed or reached viii: Resulting situation on the date on which threshold was crossed or reached Indirect 1,299,624 6. Date on which issuer notified: 16,082,856 SSGA FUNDS MANAGEMENT, INC. STATE STREET CORPORATION STATE STREET GLOBAL ADVISORS, AUSTRALIA, LIMITED STATE STREET GLOBAL ADVISORS LIMITED STATE STREET BANK AND TRUST COMPANY Direct 3.00% SUBTOTAL A Ordinary STATE STREET GLOBAL ADVISORS (JAPAN) CO., LTD. STATE STREET GLOBAL ADVISORS ASIA LIMITED Total number of voting rights of issuer vii 3.00% % of voting rights attached to shares (total of 9.A) % of voting rights 3.00% 2.88%

B 1: Financial Instruments according to Regulation 17(1)(a) of the Regulations [ ] Person subject to the notification obligation is not controlled by any natural person or legal [ X ] Full chain of controlled undertakings through which the voting rights and/or the and voting 12. Additional information xvi: Done at on 10. Information in relation to the person subject to the notification obligation (please tick the applicable box): Type of financial instrument % of voting rights through financial instruments if it equals or is higher than the notifiable threshold % of voting rights if it equals or is higher than the notifiable threshold 0.02% 0.21% 0.02% 11. In case of proxy voting: rights as of 1.08% Physical or cash settlement xii B 2: Financial Instruments with similar economic effect according to Regulation 17(1)(b) of the Regulations SUBTOTAL B.2 0.44% 0.02% 0.21% financial instruments are effectively held starting with the ultimate controlling natural person or legal entity xiv: SUBTOTAL B.1 SSGA FUNDS MANAGEMENT, INC. STATE STREET GLOBAL ADVISORS LIMITED STATE STREET GLOBAL ADVISORS, AUSTRALIA, LIMITED Exercise/ Conversion Period xi 3.00% 0.02% 1.08% 0.44% 0.01% STATE STREET GLOBAL ADVISORS TRUST COMPANY will cease to hold STATE STREET GLOBAL ADVISORS, LTD. Number of voting rights Total of both if it equals or is higher than the notifiable threshold Expiration date x entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer. xiii Name xv Number of voting rights that may be acquired if the instrument is exercised/converted. % of voting rights Type of financial instrument 0.15% 3.00% 0.15% Expiration date x % of voting rights Exercise/ Conversion Period xi BOSTON MA USA STATE STREET CORPORATION STATE STREET GLOBAL ADVISORS (JAPAN) CO., LTD. STATE STREET GLOBAL ADVISORS EUROPE LIMITED STATE STREET BANK AND TRUST COMPANY STATE STREET GLOBAL ADVISORS ASIA LIMITED 27-Oct-2025. 0.07% 1.00% 0.01% 0.07% 1.00%