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20260410_ANTM_Laporan Bulanan Aktivitas Eksplorasi_32069948_lamp2.pdf

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Page 1
                                   Exploration Report

Until March 31, 2026, ANTAM’s      Jakarta, April 10, 2026
total exploration preliminary
unaudited cost of Rp18.35          PT ANTAM (Persero) Tbk (ANTAM; IDX: ANTM; ASX: ATM) is
billion focusing on gold, nickel   pleased to announce its exploration report for periods ended
and bauxite.                       March 31, 2026 in accordance with the Indonesia Stock
                                   Exchange listing rules.

                                   ANTAM’s exploration activities until March 31, 2026 were
                                   focused on gold, nickel and bauxite with total unaudited
                                   preliminary cost of Rp18.35 billion.

                                   GOLD

                                   Until March 31, 2026, ANTAM conducted gold exploration
                                   activities in Pongkor, West Java. In Pongkor, ANTAM
                                   conducted in underground drilling, surface drilling , traverse
                                   survey, geological mapping , sampling , and geochemical
                                   analysis.


                                   NICKEL

                                   As of March 31, 2026, ANTAM remains in the process of
                                   undertaking field preparation activities for the Company’s
FOR MORE INFORMATION
                                   nickel exploration. ANTAM’s nickel exploration is planned to
PLEASE CONTACT:
                                   North Konawe and Pomalaa, Southeast Sulawesi, as well as
                                   within the Mining Business License (IUP) areas of ANTAM’s
                                   subsidiary, PT Sumberdaya Arindo (PT SDA),         in Buli, North
Wisnu Danandi Haryanto
                                   Maluku. The exploration program planned for 2026 include s,
(Corporate Secretary)
                                   among others, single -tube drilling, geological mapping, core
Tel : (6221) 789 1234
                                   sampling, core logging, drill hole measurement , geophysical
Email : corsec@antam.com           surveys, drilling activities, sample preparation, and sample
Website : www.antam.com            analysis.




                                                                                                 1
Page 2
                                        Exploration Report

BAUXITE

Bauxite exploration activities until March 31, 2026 were conducted in Tayan       and Landak, West
Kalimantan. In the Tayan area, the planned activities conducted drilling, geological mapping, drill
hole measurement , and geochemical analysis. Meanwhile the exploration activities until March
2026 are the land identification and permitting . In the Landak area, the activity carried out was
geological mapping , land identification and permitting .


ANTAM through the Geomin Unit undertakes integrated mineral exploration activities which
include area survey activities, geological exploration, geophysical exploration, geodesy survey,
drilling, physical and chemical analysis, calculation of mineral reser ves and resources supported by
integrated Geographic Information System (GIS). Exploration activities conducted to ensure the
adequacy of the Company's strategic mineral resources and reserves potential.

                       ANTAM’S EXPLORATION AREAS UNTIL MARCH 31, 2026



                                                                     Bauxite:
                                                                      Tayan




            Bauxite:
            Landak




                              Gold:
                             Pongkor




The information in this report that relates to Exploration Results, Miner al Resources or Ore Reserves is based
  on information compiled by Mr. Bronto Sutopo who is a Member of The Australasian In stitute of Mining
and Metallurgy. Mr. Bronto Sutopo is a full -time employee of the company. Mr. Bronto Sutopo has sufficient
 experience which is relevant to the style of mineralis ation and type of deposit under consideration and to
 the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the
  ‘Australasian Code for Reporting of Exploration Res ults, Mineral Resources and Ore Reserves’. Mr. Bronto
   Sutopo consents to the inclu sion in the rep ort of the matters based on his information in the form and
                                           context in which it appears.




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Names mentioned 6 people and organisations named in the text · linked when the evidence is strong

linked person Wisnu Danandi Haryanto p.1
possible org ANTAM (Persero) Tbk p.1 ×2
unresolved org Indonesia Stock Exchange p.1
unresolved org PT Sumberdaya Arindo p.1
unresolved org PT SDA p.1
unresolved person Bronto Sutopo p.2 ×4

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