Sigma and CWG Merger Risks and Management Overview

NOT FOR DISTRIBUTION OR RELEASE IN THE UNITED STATES Entitlement Offer Timetable Event Announcement of Entitlement Offer (with voluntary suspension of Sigma shares to continue) Institutional Entitlement Offer opens Institutional Entitlement Offer closes Announcement of results of Institutional Entitlement Offer Voluntary suspension lifted and Sigma shares recommence trading Entitlement Offer Record Date (7:00pm AEDT) Retail Entitlement Offer opens and Retail Entitlement Offer Booklet made available Settlement of New Shares issued under the Institutional Entitlement Offer Allotment and normal trading of New Shares issued under the Institutional Entitlement Offer Retail Entitlement Offer closes (5:00pm AEDT) Announcement of results of Retail Entitlement Offer Settlement of New Shares issued under the Retail Entitlement Offer Allotment of New Shares issued under the Retail Entitlement Offer Date Monday, 11 December 2023 Monday, 11 December 2023 Tuesday, 12 December 2023 Wednesday, 13 December 2023 Wednesday, 13 December 2023 Wednesday, 13 December 2023 Monday, 18 December 2023 Tuesday, 19 December 2023 Wednesday, 20 December 2023 Friday, 19 January 2024 Wednesday, 24 January 2024 Thursday, 25 January 2024 Normal trading of New Shares issued under the Retail Entitlement Offer Holding statements dispatched in respect of New Shares issued under the Retail Entitlement Offer Monday, 29 January 2024 Tuesday, 30 January 2024 Tuesday, 30 January 2024 40 Notes: The above timetable is indicative only and subject to change. Subject to the requirements of the Corporations Act, the ASX Listing Rules and other applicable rules, Sigma reserves the right to amend this timetable at any time, including extending the period for the Entitlement Offer or accepting late applications, either generally or in particular cases, by lodging a revised timetable with the ASX

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