CALGRO M3 HOLDINGS LIMITED (Incorporated in the Republic of South Africa) (Registration number: 2005/027663/06) JSE Share code: CGR ISIN: ZAE000109203 Company Alpha Code: CGRI1 LEI: 3789003B0859E9438F25 (“Calgro” or “the Company”) DISCLOSURE OF DISPOSAL OF SECURITIES In accordance with section 122(3)(b) of the Companies Act, No. 71 of 2008, as amended (“Companies Act”), and paragraph 3.83(b) of the JSE Limited Listings Requirements, shareholders are hereby advised that the Company has received formal notification in the prescribed form from Massachusetts Institute of Technology, acting herein for itself and as the controlling entity of the manager of 238 PLAN ASSOCIATES LLC (“Massachusetts Institute of Technology”), advising that it has disposed of a beneficial interest in securities of the Company, such that the total of all beneficial interests held by it, amounts to 3.2% of the Company’s total issued ordinary share capital. The requisite notice in terms of section 122(3)(a) of the Companies Act has been filed with the Takeover Regulation Panel. The board of the Company accepts responsibility for the information contained in this announcement and confirms that, to the best of its knowledge and belief, such information accurately reflects the information contained in the TRP 121.1 form received by the Company from Massachusetts Institute of Technology. Johannesburg 10 May 2023 Equity and Debt Sponsor PSG Capital