20260710_ARCI_Laporan Bulanan Aktivitas Eksplorasi_32110773_lamp1.pdf

                                                                         No. 0036/ARCHI/7/2026/G
PT Archi Indonesia Tbk. (the ”Company” or “ARCI”) owns 100% of Toka Tindung Gold Mine,
a gold mine located approximately 35 kilometers northeast of Manado, North Sulawesi,
through the Company’s wholly-owned subsidiaries, PT Meares Soputan Mining (“MSM”) and
PT Tambang Tondano Nusajaya (“TTN”).
Toka Tindung Gold Mine consists of two Contract of Works (“CoWs”) covering 39,817
hectares, which cover into two administration areas in North Sulawesi, North Minahasa and
Bitung City districts (Figure 1). The CoWs are valid until 2041 and held by MSM and TTN.
Pursuant to the Mining Law Amendment, MSM and TTN have been guaranteed two times
extensions of the CoWs in the form of Special Mining Business License/Izin Usaha
Pertambangan Khusus (“IUPK”), each for maximum period of 10 years.
                Figure 1. Map Location of MSM and TTN’s Contract of Works




Exploration activities carried out by the Company through its subsidiaries, MSM and TTN, from
January to June 2026 were focused on development of gold resources at Toka Tindung Gold
Mine.

                                                                          No. 0036/ARCHI/7/2026/G
In the first Semester of 2026, ARCI had conducted drilling at 157 holes with a total depth of
44,989 meters.
The work was performed by PT Maxidrill Indonesia and involved Diamond Drilling (“DD”) and
Reverse Circulation (“RC”) drilling methods. Please refer to Table 1 for the detailed of each
drilling method:
Table 1. Drilling Results Details for the Period January to June 2026 Based on Drilling Method

                          Diamond Drilling      Reverse Circulation
                                                                                  Total
                               (DD)                    (RC)
        Period
                         Number      Drilling   Number of     Drilling   Number       Drilling
                         of Holes    Meters       Holes       Meters     of Holes     Meters

 Jan - Mar 2026             31       12,013         45          8,780       76        20,793
 Apr - Jun 2026             38       12,579         43         11,617       81        24,196
 TOTAL                      69       24,592         88         20,397       157       44,989

Total Exploration expenditure from January to June 2026 was US$5.6 million.

The Exploration areas are selectively defined based on the results of previously conducted
historical exploration activities, which indicate the presence of prospective mineralization
potential. The determination of these areas takes into consideration the available geological
data and interpretations, with the objective of optimizing the potential for the discovery of
valuable mineral resources.

The Geological models have been updated based on the exploration drilling results, and the
following is a summary of the significant discoveries:

   1.   Interval of 4.60m with a gold grade of 10.20 g/t at a depth of 342.30m – 346.90m
   2.   Interval of 3.35m with a gold grade of 2.10 g/t at a depth of 359.65m – 363.00m
   3.   Interval of 18.15m with a gold grade of 2.24 g/t at a depth of 182.65m – 200.80m
   4.   Interval of 11.30m with a gold grade of 7.22 g/t at a depth of 285.80m – 297.10m
   5.   Interval of 3.10m with a gold grade of 25.18 g/t at a depth of 285.80m – 288.90m
   6.   Interval of 23.00m with a gold grade of 4.25 g/t at a depth of 213.00m – 236.00m