Allkem Shareholders vote in favour of merger with Livent - Seite 3

Canadian Register Shareholders: 5:00 pm (Toronto time) / 10:00 pm (UTC) on 20 December 2023 Arcadium Lithium admitted to the official list of ASX 21 December 2023 Effective Date 21 December 2023 Suspension of Allkem Shares from trading on ASX Close of trading on 21 December 2023 (AEDT) Suspension of Allkem Shares from trading on TSX 4:00 pm (Toronto time) / 9:00 pm (UTC) on 21 December 2023 Arcadium Lithium CDIs to commence trading on ASX on a deferred settlement basis 22 December 2023 Record Date for determining entitlements to receive Scheme Consideration 7:00 pm (AEDT) on 27 December 2023 Scheme Implementation Date 4 January 2024 US Merger Effective Time 4 January 2024 (New York time) Last day of deferred settlement trading for Arcadium Lithium CDIs 4 January 2024 Arcadium Lithium Shares anticipated to commence trading on NYSE 9:30 am (New York time) on 4 January 2024 Dispatch of holding statements for Arcadium Lithium CDIs 5 January 2024 Arcadium Lithium CDIs to commence trading on ASX on a normal settlement basis 10:00 am (AEDT) on 5 January 2024 Expected date for Allkem to be delisted from ASX Close of trading on 5 January 2024 (AEDT) Expected date for Allkem to be delisted from TSX Close of trading on 5 January 2024 (Toronto time) First settlement of deferred settlement and normal settlement trading of Arcadium Lithium CDIs 9 January 2024

Note: All references to time above are references to AEDT (Sydney time), unless otherwise specified.

All dates are indicative only and, among other things, are subject to all necessary approvals from the Court and other Governmental Entities and the satisfaction or permissible waiver of all other applicable closing conditions. Allkem reserves the right to vary the times and dates set out above. Any changes to the above timetable will be announced through ASX, filed under Allkem’s profile on SEDAR+ and notified on www.allkem.co.