The Board of Directors of PT Tembaga Mulia Semanan, Tbk (the “Company”) hereby notifies all Shareholders that the Company will hold an Annual General Meeting of Shareholders (the “Meeting”) on Friday, June 12, 2026. In accordance with the provisions of the Company’s Articles of Association and in accordance with Financial Services Authority Regulation No. 15/POJK.04/2020 concerning the Planning and Implementation of General Meetings of Shareholders of Public Companies (“POJK 15/2020”), it is hereby announced that:

1. Shareholders entitled to attend/be represented and vote at the Meeting are the Company’s Shareholders whose names are registered in the Company’s Shareholder Register or Shareholders in sub-accounts at PT Kustodian Sentral Efek Indonesia (“KSEI”) at the close of trading of the Company’s shares on the Indonesia Stock Exchange (“IDX”) on Wednesday, May 20, 2026, at 4:00 PM Western Indonesian Time.
2. The Company’s shareholders may propose items for the Meeting agenda if they meet the requirements stipulated in Article 16 paragraph (3) of POJK 15/2020 and Article 12 of the Company’s Articles of Association, with the following provisions:
   1. 1 (one) or more shareholders representing at least 1/20 (one twentieth) of the total number of shares issued by the Company with valid voting rights;
   2. submitted in writing to the Company’s Board of Directors;
   3. the proposal must be received by the Company’s Board of Directors no later than 7 (seven) days prior to the date of the Meeting notice;
   4. the proposal must be made in good faith; take into account the interests of the Company; constitute an agenda item requiring a decision by the Meeting; include the reasons and materials for the proposed Meeting agenda item; and not conflict with the Company’s Articles of Association and laws and regulations.
3. The Meeting Invitation and Meeting Agenda will be announced on the IDX website, the Company’s website, and the KSEI website on Thursday, May 21, 2026.
4. Shareholders may attend electronically by providing electronic power of attorney through the KSEI Electronic General Meeting System (“eASY.KSEI”) facility, which will be provided by KSEI as an electronic power of attorney (“e-Proxy”) mechanism for holding the Meeting. The e-Proxy facility is available to Shareholders entitled to attend the Meeting from the date of the Meeting Invitation until 1 (one) business day prior to the Meeting, namely Thursday, June 11, 2026, at 4:00 PM WIB. In accordance with Article 8 paragraph (3) of POJK 16/2020, Shareholders or their Proxies may attend physically or electronically through the e-RUPS provided by KSEI.