Mr. Andrew Barber reports

DISPATCH OF SCHEME BOOKLET

Allkem Ltd. has today dispatch of the notice of meeting and explanatory statement in relation to the proposed scheme of arrangement pursuant to which Arcadium Lithium PLC will acquire all of the shares in Allkem under the transaction. Dispatch was completed in accordance with the orders of the Court (and in the manner described in Allkem's ASX announcement dated 8 November 2023).

In particular:

Allkem shareholders who have elected to receive hard copies of communications from Allkem have been sent (by post) a physical copy of the Scheme Booklet, as well as a personalised proxy form;

Allkem shareholders who have elected to receive electronic communications from Allkem have been sent an email containing instructions about how to access and download a copy of the Scheme Booklet, as well as how to lodge their proxy form and/or voting instructions; and

Allkem shareholders who have not made an election (to either receive electronic or hard copy communications from Allkem) have been sent a letter (by post) containing instructions about how to access and download a copy of the Scheme Booklet, along with a personalised proxy form for the Scheme Meeting.

The Scheme Booklet, including the Independent Expert's Report, is also available on Allkem's website at: www.allkem.co, and on Allkem's ASX announcements page at: www.asx.com.au .

Indicative Scheme Timetable

The key dates expected for the Transaction are set out below. Allkem will continue to update shareholders about any material developments in relation to the Transaction or the indicative timetable for the Transaction, as the timetable progresses.

All dates following the date of the Scheme Meeting 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 (which may include an earlier Second Court Hearing) will be announced through ASX, filed under Allkem's profile on SEDAR+ and notified on: www.allkem.co.

Shareholder Information Line

If you have any questions about the Scheme or the Scheme Booklet after reading the Scheme Booklet, please contact the Allkem Shareholder Information Line on 1300 367 804 (within Australia) or +61 2 9066 6162 (outside Australia) from 9:00 am to 5:00 pm (AEDT), Monday to Friday (excluding public holidays).