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    PT TBS Energi Utama Tbk
Kuartal-III/
    PT TBSthe  3rd Quarter
             Energi        of 2026
                    Utama Tbk
 Kuartal-I/ the 1 Quarter of 2026
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           KATA PENGANTAR                                 INTRODUCTION

PT TBS Energi Utama Tbk (“Perseroan”)        PT TBS Energi Utama Tbk (the
adalah perusahaan tercatat di Bursa Efek     “Company”) is a company listed on the
Indonesia yang tengah bertransisi dari       Indonesia Stock Exchange that is
bisnis batu bara di Indonesia menuju         transitioning from its coal business in
pengembangan infrastruktur berkelanjutan     Indonesia toward the development of
di    Asia.     TBS     membangun      dan   sustainable infrastructure in Asia. TBS
mengoperasikan       bisnis   di    bidang   builds and operates businesses in waste
pengelolaan limbah, energi terbarukan, dan   management, renewable energy, and
mobilitas listrik, sembari mengelola sisa    electric mobility, while responsibly
operasi batu bara secara bertanggung         managing its remaining coal operations
jawab selama masa transisi.                  during the transition period.

Perseroan mempunyai 3 (tiga) anak            The Company has 3 (three) subsidiaries
perusahaan yang bergerak di bidang           engaged in the coal mining sector, located
pertambangan batu bara, terletak di daerah   in the Sangasanga area, Kutai Kartanegara
Sangasanga, Kabupaten Kutai Kartanegara,     Regency, East Kalimantan. The company's
Provinsi Kalimantan Timur. Adapun ketiga     subsidiaries are:
anak perusahaan Perseroan tersebut
adalah:                                      1. PT Trisensa Mineral Utama (TMU)
1. PT Trisensa Mineral Utama (TMU)           2. PT Indomining (IM)
2. PT Indomining (IM)                        3. PT Adimitra Baratama Nusantara
3. PT Adimitra Baratama Nusantara (ABN)         (ABN)

Area konsesi ketiga anak perusahaan          The concession areas of the three
terletak      berdampingan.        Seluruh   subsidiaries are located adjacent to one
infrastruktur    pendukung     operasional   another. All supporting infrastructure for
penambangan seperti jalan angkut batu        mining operations, including coal haul
bara,      perkantoran,      perbengkelan,   roads, offices, workshops, dedicated coal
pelabuhan     khusus    batu   bara    dan   terminals, and other infrastructure, is
infrastruktur lainnya berada di daerah       located in Kutai Kartanegara Regency,
Kabupaten Kutai Kartanegara, Provinsi        East Kalimantan.
Kalimantan Timur.

Dalam rangka memenuhi Ketentuan III.1.6,     In compliance with Provision III.1.6 of
Peraturan Nomor I-E tentang Kewajiban        Regulation     Number      I-E    regarding
Penyampaian      Informasi,     Lampiran     Information Disclosure Obligations—as set
Keputusan Direksi PT Bursa Efek Jakarta      forth in the Attachment to the Decree of
Nomor Kep-00087/BEI/12-2025 tanggal 12       the Board of Directors of PT Bursa Efek
Desember 2025, maka bersama ini kami         Jakarta Number Kep-00087/BEI/12-2025
sampaikan Laporan Kegiatan Eksplorasi        dated December 12, 2025, we hereby
Perseroan untuk Kuartal-3 2026.              submit the Company’s Exploration Activity
                                             Report for the third quarter of 2026.
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                   BAB I                                            CHAPTER I
               PENDAHULUAN                                        INTRODUCTION


I. Latar Belakang                                 I. Background

Batu bara merupakan bahan galian yang             Coal is an economically valuable excavation
bernilai ekonomis, sehingga diminati oleh         material, so it is in demand by foreign investors
investor asing maupun investor dalam negeri.      as well as domestic investors. The coal mining
Usaha pertambangan batu bara mempunyai            business has prospects as a mainstay sector of
prospek sebagai sektor andalan pengganti          oil and gas replacement in building the
migas dalam membangun perekonomian                economy of East Kalimantan in the future. It is
Kalimantan Timur di masa mendatang. Hal ini       based on available coal resources and
didasarkan pada sumber daya dan potensi batu      potentials, marketing prospects as well as local
bara yang tersedia, prospek pemasaran serta       government policy support.
dukungan kebijakan pemerintah daerah.


Kegiatan pertambangan pada dasarnya tidak         Mining activities, by their nature, inevitably
terlepas dari perubahan terhadap kondisi alam     bring about changes to the surrounding natural
dan lingkungan di sekitarnya. Di sisi lain,       environment. At the same time, the mining
kegiatan pertambangan juga memiliki peran         industry plays an important role in supporting
penting dalam mendukung kesejahteraan             human well-being by providing essential raw
masyarakat melalui penyediaan bahan baku          materials for various industries, energy needs,
bagi berbagai sektor industri, energi, dan        and other purposes.
kebutuhan lainnya.




                       Gambar 1.1. Lokasi Tambang PT TBS Energi Utama Tbk
                          Image 1.1. PT TBS Energi Utama Tbk Mining Site
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Gambar 1.2. Skema Kegiatan Operasional Penambangan PT TBS Energi Utama Tbk
               Image 1.2. Scheme of Mining Operations of PT TBS Energi Utama Tbk




         Gambar 1.3. Lokasi Konsesi Ketiga Anak Perusahaan PT TBS Energi Utama Tbk
       Image 1.3. Concession area of The Three Subsidiaries of PT TBS Energi Utama Tbk
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I. 1. PT TRISENSA MINERAL UTAMA (“TMU”)

TMU merupakan perusahaan tambang batu            TMU is a coal mining company with an
bara dengan daerah penambangan secara            administrative mining area including the sub-
administratif termasuk wilayah Kecamatan Loa     districts of Loa Janan, Sangasanga, Muara
Janan, Sangasanga, Muara Jawa, Kabupaten         Jawa, Kutai Kartanegara Regency, East
Kutai Kartanegara Provinsi Kalimantan Timur      Kalimantan Province with an area of 3,414 ha
dengan Luas wilayah 3.414 ha dan kode            and the 2010 KTN area code 3133 OP. TMU has
Wilayah KTN 2010 3133 OP. TMU telah              received approval to carry out mining activities
mendapat persetujuan untuk melakukan             and sell excavated products with the Decree of
aktivitas penambangan dan penjualan hasil        the Minister of Investment/Head of the
galian dengan Keputusan Menteri Investasi/       Investment Coordinating Board Number:
Kepala Badan Koordinasi Penanaman Modal          1098/1/IUP/PMDN/2022 concerning approval
Nomor: 1098/1/IUP/PMDN/2022 Tentang              for granting extensions of mining business
persetujuan Pemberian Perpanjangan Izin          permits at the production operation activity
Usaha Pertambangan Pada Tahap Kegiatan           stage for coal commodities to PT Trisensa
Operasi Produksi untuk Komoditas Batu bara       Mineral        Utama         (area        code
kepada PT Trisensa Mineral Utama (kode           3364023032014055) on September 21, 2022.
wilayah 3364023032014055) pada tanggal 21
September 2022.

Pada Kuartal-3 2026, pelaksanaan pekerjaan       In the 3rd Quarter of 2026, the implementation
yang dilakukan oleh TMU telah menyerap           of work carried out by TMU absorbed a
tenaga kerja sebanyak 92 orang sedangkan         workforce of 92 people while for contractors
untuk kontraktor dan sub-kontraktornya 770       and sub-contractors 770 people were divided
orang dan dibagi menjadi 2 shift kerja.          into 2 shifts of work. The mining contractor
Kontraktor tambang yang digunakan adalah PT      used is PT Multindo Prima Teknik (MPT).
Multindo Prima Teknik (MPT). Penambangan         Mining is done by surface open pit mining
yang dilakukan dengan sistem tambang             system with truck and shovel method.
terbuka (surface open pit mining) dengan
metode truck dan shovel.

Produk batu bara yang dihasilkan TMU memiliki    Coal products produced by TMU have an
kalori rata-rata 4500 GAR dengan Total           average calorie of 4500 GAR with Total
Sulphur (TS) di bawah 1%. Kualitas batu bara     Sulphur (TS) below 1%. The quality of this coal
ini cukup memenuhi permintaan pasar yang         is enough to meet the demand of the market
menginginkan batu bara dengan sulphur            who want low sulphur coal. Implementation of
rendah.        Pelaksanaan        pengelolaan    Occupational Safety and Health management
Keselamatan dan Kesehatan Kerja yang             implemented in TMU refers to the program /
diterapkan di TMU mengacu kepada                 plan of Occupational Safety and Health
program/rencana Pengelolaan Keselamatan          Management in accordance with applicable
dan    Kesehatan     Kerja   sesuai dengan       laws and regulations.
perundang-undangan yang berlaku.

Kegiatan pengelolaan dan pemantauan              Environmental management and monitoring
lingkungan yang dilakukan TMU meliputi           activities carried out by TMU include greening
kegiatan penghijauan yang dilakukan di           activities carried out at the Road Embankment,
Tanggul Jalan, Tanggul Stockpile, Tanggul        Embankment Stockpile, Front Embankment
Depan Timbangan, Settling Pond, Waste Dump       Scales, Settling Pond, Waste Dump and New
dan Bench Office Baru. Pada saat ini, TMU juga   Bench Office. Currently, TMU also manages
melakukan pengelolaan dan pemantauan             and monitors water quality, dust, noise, B3
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kualitas air, debu, kebisingan, limbah B3 dan   waste and domestic waste, as well as
limbah domestik, serta pemantauan tingkat       monitoring erosion rates.
erosi.


I. 2. PT INDOMINING (“IM”)

Berdasarkan Izin Usaha Produksi Nomor:          Based on Production Business License Nomor:
540/004/IUP-OP/MB-PBAT/III/2013 tanggal         540/004/IUP-OP/MB-PBAT/III/2013 dated
15 Maret 2013, IM melakukan kegiatan            March 15, 2013, IM conducted coal exploration
eksplorasi dan penambangan batu bara serta      and mining activities and its production in
hasil produksinya di daerah Kecamatan           Sangasanga District, Kutai Kartanegara
Sangasanga, Kabupaten Kutai Kartanegara,        Regency, East Kalimantan Province. IM's
Provinsi Kalimantan Timur. Tahap produksi IM    production phase began in August 2007, while
dimulai pada bulan Agustus 2007, sedangkan      commercial production began in October
produksi komersial dimulai pada bulan Oktober   2007.
2007.

Kegiatan    penambangan      IM   dilakukan     IM mining activities are carried out by mining
kontraktor penambangan yaitu PT RPP             contractor PT RPP Contractors Indonesia
Contractors Indonesia (RCI) dan CV Multindo     (RCI) and CV Multindo Prima Teknik (MPT).
Prima Teknik (MPT). Kegiatan penambangan        Mining activities are surface open pit mining
merupakan penambangan terbuka (surface          with truck and shovel methods.
open pit mining) dengan metoda truck dan
shovel.

Pada Kuartal-3 2026, sumber daya manusia        As of 3rd Quarter 2026, human resources
yang bekerja dalam kegiatan operasional IM      working in IM's operational activities reached
mencapai 23 tenaga kerja termasuk kontraktor    23 workers including contractors and sub-
dan subkontraktor. Dari 23 orang tersebut       contractors. Of those 23 people, about 80%
sekitar 80% merupakan tenaga kerja lokal        are local workers to support community
sebagai penunjang program community             development programs with the aim of
development      dengan     tujuan    untuk     improving the welfare of the communities
meningkatkan kesejahteraan masyarakat di        around the mine.
sekitar tambang.

Produk batu bara IM memiliki kualitas antara    IM coal products have quality between 4200 -
4200 - 5600 GAR dengan total sulphur antara     5600 GAR with total sulphur between 0.2% -
0.2% - 2.0%. Produk cukup bersaing di dalam     2.0%. The product is quite competitive in the
pasar internasional maupun domestik.            international and domestic markets.


I. 3. PT ADIMITRA BARATAMA NUSANTARA (“ABN”)

ABN didirikan pada tahun 2004, dan mengelola    ABN was established in 2004, and manages a
daerah pertambangan dengan luas area sekitar    mining area of about 2,990 ha located in
2.990 ha yang berlokasi di Desa Kampung         Kampung Jawa Village, Sangasanga District
Jawa, Kecamatan Sangasanga dan Desa             and Muara Kembang Village, Muara Jawa
Muara Kembang, Kecamatan Muara Jawa,            District, Kutai Kartanegara Regency, East
Kabupaten Kutai Kartanegara, Kalimantan         Kalimantan. Based on Mining Business License
Timur. Berdasarkan pada         Izin  Usaha     Production Operation Number: 540/1691/IUP-
Pertambangan Operasi Produksi Nomor:            OP/MB-{BAT/XII/2009 dated December 1,
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540/1691/IUP-OP/MB-{BAT/XII/2009                 2009, ABN conducts exploration, coal mining,
tanggal 1 Desember 2009, ABN melakukan           and marketing of production at its mine site.
kegiatan eksplorasi, penambangan batu bara,
dan pemasaran hasil produksi di lokasi
tambangnya tersebut.

ABN mulai melakukan kegiatan eksplorasi dan      ABN began its exploration and infrastructure
pembangunan infrastruktur pada tahun 2007,       development activities in 2007, while
sedangkan produksi komersial dimulai pada        commercial production began in 2008. ABN
tahun 2008. Produk batu bara ABN termasuk        coal products belong to thermal coal group
dalam kelompok thermalcoal dengan rank sub-      with sub-bituminous and bituminous rank, with
bituminous dan bituminous, dengan 4 jenis        4 types of ABN 52 (CV 5200 GAR & TS < 1),
tipe yaitu ABN 52 ( CV 5200 gar & TS < 1), ABN   ABN 50 (CV 5000 GAR & TS < 1), ABN 42 (CV
50 ( CV 5000 gar & TS < 1), ABN 42 ( CV 4200     4200 GAR & TS < 1) and ABN 56 HS (CV 5600
gar & TS < 1) dan ABN 56 HS(CV 5600 gar &        gar & TS <2)). Thermal coal is marketed to
TS < 2)). Thermal coal dipasarkan ke beberapa    several countries in the world, including India,
negara di dunia, diantaranya India, Cina,        China, Japan, Italy, Thailand, and Korea. ABN
Jepang, Italia, Thailand, dan Korea. ABN juga    also supplies for domestic market, including
mensuplai untuk kebutuhan dalam negeri, yaitu    coal-fired power plants (PLTUs) cement
PLTU, industri semen dan beberapa industri       industry and several other industries.
lainnya.

Sistem penambangan yang dilakukan ABN            ABN's mining system is surface open pit
yaitu sistem penambangan terbuka (surface        mining. Coal ABN has a low ash content, so it is
open pit mining). Batu bara ABN memiliki         not done by washing process, only done by
kandungan abu yang rendah, sehingga tidak        crushing process. Mining activities of PT ABN
dilakukan   pencucian    (washing),   hanya      is carried out by one main contractor, PT
dilakukan proses peremukan (crushing).           Gunungmas Sukses Makmur (GSM).
Kegiatan penambangan PT ABN dilakukan oleh
satu kontraktor utama, yaitu PT. Gunungmas
Sukses Makmur (GSM).

Pada Kuartal-III 2026, sumber daya manusia       In The 3rd Quarter of 2026, human resources
yang terlibat dalam kegiatan operasional ABN     involved in ABN's operational activities
mencapai sekitar 273 orang, yang terdiri dari    reached about 273 people, consisting of 159
159 orang tenaga kerja pada ABN dan 114          workers in ABN and 114 workers in contractors
orang tenaga kerja pada kontraktor maupun        and sub-contractors.
sub-kontraktor.

Sebagai salah satu wujud pemberdayaan            As the form of empowerment of the
masyarakat sekitar, ABN bersama-sama             surrounding community, ABN along with
dengan kontraktor dan sub-kontraktor saat ini    contractors and sub-contractors currently
telah menampung tenaga kerja lokal               have accommodated local workers in
Kecamatan Sangasanga & Kecamatan Muara           Sangasanga District & Muara Jawa District,
Jawa, Kabupaten Kutai Kartanegara kurang         Kutai Kartanegara Regency approximately
lebih 80 % dari kebutuhan tenaga kerja,          about 80% of the labor needs, while the
sedangkan sisanya sekitar 20 % berasal dari      remaining about 20% comes from outside the
luar daerah dua kecamatan tersebut.              area of the two sub-districts.
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                   BAB II                                       CHAPTER II
            KEGIATAN EKSPLORASI                            EXPLORATION ACTIVITY



II. 1. PT TRISENSA MINERAL UTAMA (“TMU”)

1. 1. DAERAH EKSPLORASI                        1. 1. EXPLORATION AREA
Pada Kuartal-3 2026 tidak ada kegiatan         In the 3rd Quarter of 2026, there will be no
eksplorasi berupa pengeboran. Kegiatan         exploration activities in the form of drilling.
sampling pit pada seam-seam yang               Sampling pit activities on mined seams are
tertambang sementara tidak dilakukan karena    temporarily not carried out because the
data kualitas yang sudah ada masih cukup.      existing quality data is still sufficient.



1. 2. METODE PENGUKURAN                        1. 2. MEASUREMENT METHODS

Trenching                                      Trenching

Secara teknis di lapangan tim geologist        Technically in the field, the geologist team
melakukan trenching dengan membuat paritan     conducted trenching by making an elongated
memanjang memotong strike seam – seam          trench cutting the strike seam – seam target to
target sebatas titik plan yang dibuat          the point plan made earlier. This serves to
sebelumnya.    Hal   ini   berfungsi  untuk    cover the entire region so that all seams can be
mengcover seluruh wilayah agar semua seam      found. The average length of trenching in a day
dapat ditemukan. Rata – rata panjang paritan   can reach 80 m -100 m depending on the
trenching dalam sehari bisa mencapai 80 m -    terrain / area of work whether in a ramp,
100 m tergantung dari medan/areal kerjanya     swamp or hilly with a steep slope.
apakah di tempat landai, rawa atau berbukit
dengan kemiringan terjal.

Pengambilan sampel untuk di mengetahui nilai   Sampling to find out the values of quality is
–nilai kualitasnya dilakukan per jarak 100 m   done per distance of 100 m between trenching
antar lubang trenching.                        holes.

Sampling                                       Sampling

Tim geologi juga melakukan sampling seam –     The geology team also samples seams in the pit
seam di pit guna mengetahui kualitas terbaru   to find out the updated quality of the seams
dari seam–seam yang akan ditambang.            that will be mined.
Metode yang digunakan adalah:                  The methods used are:


1. Jarak antar titik sampling maksimal 20 m    1. The distance between sampling points
   per seam searah strike bukaan batu bara        maximum 20 m per seam direct strike coal
   yang akan diambil (getting).                   openings to be taken (getting).

                                               2. Re-sampling/update on each new layer
2. Sampling ulang/update pada tiap bukaan         opening on a seam (maximum 1 layer
   layer baru pada suatu seam (maksimal 1         opening as high as 3 m).
Page 9
   bukaan layer setinggi 3 m).

3. Sampling pada seam–seam bukaan                      3. Sampling on seams new openings/ seam
   baru/seam yang pertama kalinya akan di                 the first time will be in getting. The mining
   getting. Adapun plan penambangan sampai                plan until the end of the year is targeted at
   dengan akhir tahun ditargetkan pada seam               a seam with calorie value (ar)_g above
   dengan nilai Calori (ar)_g di atas 4500.               4500.

1. 3. BIAYA EKSPLORASI                                 1. 3. EXPLORATION COSTS
Biaya Eksplorasi TMU yang dikeluarkan di               TMU Exploration Costs incurred in the 3rd
Kuartal-3 2026 sebagai berikut:                        Quarter of 2026 as follows:


                                         Q3 2026                          Year To Date
      Biaya Operasional          Anggaran      Realisasi            Anggaran        Realisasi
      Operating Expense           Budget           Realization        Budget          Realization
                                   (IDR)             (IDR)            (IDR)              (IDR)
   Juli / July                   4,600,000             0           50,000,000              0
   Agustus / August              4,600,000             0           50,000,000              0
   September                     4,600,000             0           50,000,000              0

Biaya Eksplorasi untuk tahun 2026 yang sesuai          Exploration Cost for 2026 in accordance with
dengan RKAB 2026 bagian geologi berupa                 RKAB 2026 geological section in the form of
biaya analisa kualitas batu bara di laboratorium       coal quality analysis cost at laboratory
maksimal 3 sampel/bulan. Biaya untuk                   maximum 3 samples per month. The cost for
kegiatan trenching yang menggunakan unit PC            trenching activities that use PC 200 units is
200 biayanya dimasukkan ke departemen                  accommodated to the production department
produksi untuk pekerjaan general dengan                for general work with a record of trenching
catatan kegiatan trenching pada lembar                 activities on the unit usage timesheet.
timesheet pemakaian unit.

1. 4. PELAKSANAAN DAN                                  1. 4. IMPLEMENTATION AND
      PENGAWASAN                                             SUPERVISION
Pengawasan Test Pit/Trenching dan sampling             Supervision of Test Pit/ Trenching sampling of
batu bara di pit TMU dilakukan oleh Geologist          coal in the TMU pit conducted by TMU
TMU.                                                   geologist.


1. 5. KEMAJUAN EKSPLORASI                              1. 5. EXPLORATION PROGRESS

Kesimpulan Eksplorasi TMU Kuartal-3 2026               Conclusion of TMU Exploration in the 3rd
                                                       Quarter of 2026

Kegiatan eksplorasi untuk kuartal ke- 3 ini            Exploration activities for this quarter is pit
berupa sampel batu bara di pit aktif B1WA pada         sampling on active pit B1WA on seam Y, Z, and
seam Y, Z, dan ZA.                                     ZA:

1. Tim Geologist memonitoring seam -seam
   yang tertambang di pit aktif terutama untuk         1. The Geologist team monitors the seams
   nilai   kualitas,   kemenerusan         dan            mined in the active pit, mainly for their
   ketebalannya.                                          quality value, continuity and thickness.
Page 10
1. 6. RENCANA KEGIATAN                              1. 6. PLANS FOR FURTHER
      EKSPLORASI SELANJUTNYA                              EXPLORATION ACTIVITIES
Rencana Kegiatan Divisi Geologi Kuartal-4           The Geological Division Plan for 4th Quarter
2026:                                               2026:

1. Tidak ada rencana kegiatan eksplorasi            1. There are no exploration activities for the
   untuk kuartal ke 4 tahun 2026. Masih                4th quarter of 2026. Still waiting for further
   menunggu arahan selanjutnya.                        directions.


II. 2. PT INDOMINING (“IM”)

2. 1. DAERAH EKSPLORASI                             2. 1. EXPLORATION AREA
Pada Kuartal-3 2026, IM tidak ada kegiatan          In the 3rd Quarter of 2026, IM had no drilling
pemboran.                                           activities.

2. 2. METODE PENGUKURAN                             2. 2. MEASUREMENT METHODS
Untuk kegiatan pemboran infill menggunakan          For infill drilling activities using touch coring
metode touch coring, sedangkan untuk                method, while for geotechnical drilling is done
pemboran geoteknik dilakukan dengan                 by drilling Full Coring method.
pemboran metode Full Coring.

Pemboran geoteknik dilakukan juga dengan            Geotechnical drilling is also carried out using
menggunakan metode Standard Penetration             the Standard Penetration Test (SPT) method.
Test (SPT). Prinsip kerja SPT adalah dengan         The working principle of SPT is to hit a
memukul sebuah tabung standar ke dalam              standard tube into a drill hole 45 cm deep using
lubang bor sedalam 45 cm menggunakan palu           a hammer weighing 63.5 KG that falls freely
dengan berat 63.5 KG yang jatuh bebas dari          from a height of 76 cm. What counts is the
ketinggian 76 cm. Yang dihitung adalah jumlah       number of blows to penetrate as deep as 15 cm.
pukulan untuk melakukan penetrasi sedalam 15        The number of blows used is penetration as
cm. Jumlah pukulan yang digunakan adalah            deep as the last 30 cm.
penetrasi sedalam 30 cm terakhir.


2. 3. BIAYA EKSPLORASI                              2. 3. EXPLORATION COSTS
Biaya Eksplorasi IM yang dikeluarkan di             IM Exploration Costs incurred in the 3rd Quarter
Kuartal-3 2026 sebagai berikut:                     of 2026 as follows:


                                       Q3 2026                        Year To Date
        Biaya Operasional       Anggaran     Realisasi           Anggaran       Realisasi
       Operating Expense         Budget         Realization       Budget         Realization
                                  (IDR)           (IDR)           (IDR)             (IDR)
     Juli / July               83,333,333            -         583,333,331             -
     Agustus / August          83,333,333            -         666,666,664             -
     September                 83,333,333            -         749,999,997             -
Page 11
2. 4. PELAKSANAAN DAN                                  2. 4. IMPLEMENTATION AND
     PENGAWASAN                                              SUPERVISION
Kegiatan Pemboran diawasi oleh Departemen              Drilling activities are supervised by the
Engineering Section Geologist.                         Department of Engineering geologist section.

2. 5. KEMAJUAN EKSPLORASI                              2. 5. EXPLORATION PROGRESS
Pada Kuartal-3 2026 belum ada kegiatan                 As of the 3rd Quarter of 2026, there are no
pemboran lanjutan. Namun ada beberapa                  further drilling activities. But there are several
kegiatan Geologi yang berlanjut dilakukan,             geological activities that continue to be carried
diantaranya:                                           out, including:

1. Melakukan analisis kestabilan lereng di area        1. Perform slope stability analysis in the active
   pit aktif Pit, baik pada sisi low wall, high wall      pit area, both on the low wall side, high wall
   maupun sidewall serta disposal IPD border              and sidewall and disposal IPD South
   Selatan, kaitannya untuk mengetahui nilai              border, related to knowing the value of
   safety factor (FoS) untuk kontrol                      safety factor (FoS) to control the formation
   pembentukan desain Pit Aktif supaya stabil             of Active Pit design to be stable and safe.
   dan aman.
                                                       2. Updating the geotechnical study and
2. Melakukan update kajian geoteknik dan                  renewing the hydrogeological study within
   pembaruan kajian hidrogeologi di area pit              the pit area and it’s surroundings.
   dan sekitarnya.

2. 6. RENCANA KEGIATAN                                 2. 6. PLANS FOR FURTHER
     EKSPLORASI SELANJUTNYA                                  EXPLORATION ACTIVITIES
IM pada periode Kuartal-4 2026 belum                   IM for the 4th Quarter of 2026 doesn’t have
merencanakan melakukan aktifitas kembali               planned to resume further exploration drilling
pengeboran eksplorasi lanjutan, baik itu               activities, be it infill drilling or Geotechnical
pengeboran     infill maupun  pengeboran               drilling in the IM concession area.
Geoteknik di area konsesi IM.

Sehubungan dengan rencana pengoptimalan                In relation to the mining optimization plan at
penambangan pada pit utama Indomining                  Indomining's main pit to a depth of RL-95
hingga kedalaman RL-95 meter sesuai target             meters according to the Mine Plan target for
Mine Plan untuk pit IM dan dalam rangka                the IM pit and in order to optimize the mineable
mengoptimalkan mineable reserve seam-seam              reserve of potential seams, the quality and
potensial, kualitas dan kuantitas jumlah data          quantity of exploration data owned by PT
eksplorasi yang dimiliki oleh PT Indomining            Indomining through the current geological
melalui model geologi saat ini sudah cukup             model are sufficiently representative and meet
mewakili serta memenuhi dengan jumlah                  the number of distribution of existing
distribusi titik – titik bor yang ada sangat baik      boreholes very well to cover the optimization of
untuk mengcover optimasi cadangan batu bara            coal reserves in the planning of the mining
dalam perencanaan proses penambangan                   process of the PIT design geometry during the
geometri desain PIT selama periode untuk               period for 2026.
Tahun 2026.

II. 3. PT ADIMITRA BARATAMA NUSANTARA (“ABN”)

3. 1. DAERAH EKSPLORASI                                3. 1. EXPLORATION AREA
Pada Kuartal-III 2026, ABN melakukan                   In Q3 2026, ABN updated the geological model
pembaruan model geologi di area Pit 6                  for the Pit 6 area based on actual roof and floor
Page 12
berdasarkan data roof & floor aktual dari hasil       data from survey measurements, reconciled
pengukuran survey, melakukan rekonsiliasi             the geological model against actual survey data
model geologi terhadap data survey actual,            and conducted real-time slope stability
serta melakukan pemantauan kestabilan                 monitoring using SSR (Slope Stability Radar).
lereng secara real time dengan menggunakan
SSR (Slope Stability Radar)                           Apart from exploration activities within the ABN
                                                      IUP concession, the exploration team also
Selain kegiatan eksplorasi di dalam konsesi IUP       carried out prospecting studies and reviews of
ABN, tim eksplorasi juga melakukan studi              the potential for developing minerals outside
prospeksi dan review terhadap potensi                 the ABN IUP. In the 3rd Quarter, the exploration
pengembangan bahan galian di luar IUP ABN.            team completed 1 of prospecting studies on the
Pada    kuartal-III,  tim    eksplorasi   telah       potential coal.
menyelesaikan sebanyak 1 desk studi
prospeksi terhadap potensi Batu bara.

3. 2. METODE PENGUKURAN                               3. 2. MEASUREMENT METHODS
Channel sampling dilakukan melalui pemetaan           Channel sampling is conducted through
dan pengukuran aktual batu bara yang telah            mapping and actual measurement of the
terekspos (thickness, strike, dip, collar).           exposed coal (thickness, strike, dip, collar).
Selanjutnya, sampel diambil secara komposit           Furthermore,      samples      are      collected
untuk analisis kualitas batu bara sebagai dasar       compositely for coal quality analysis to serve as
pemutakhiran (update) model geologi seiring           a basis for updating the geological model in line
dengan kemajuan tambang. Kegiatan ini tidak           with mine advancement. This activity was not
dilakukan pada Kuartal III-2026 karena tidak          carried out in the 3rd Quarter of 2026 because
ada perubahan kualitas batu bara yang                 there were no significant changes in coal
signifikan.                                           quality.

3. 3. BIAYA EKSPLORASI                                3. 3. EXPLORATION COSTS
Biaya Eksplorasi ABN yang dikeluarkan di              ABN Exploration Costs incurred in The 3rd
Kuartal-3 2026 sebagai berikut:                       Quarter of 2026 as follows:


        Biaya                     Q3 2026                            Year To Date
      Operasional        Anggaran        Realisasi             Anggaran         Realisasi
       Operating          Budget            Realization         Budget            Realization
         Expense          (IDR)               (IDR)             (IDR)               (IDR)
     Juli / July       472.000.000         463.115.000      2.122.200.000       2.087.075.000
     Agustus /
                       250.000.000         245.000.000      2.372.200.000       2.332.075.000
     August
     September         250.000.000         245.000.000      2.622.200.000       2.577.075.000


3. 4. PELAKSANAAN DAN                                 3. 4. IMPLEMENTATION AND
     PENGAWASAN                                            SUPERVISION
Kegiatan dilaksanakan dan diawasi oleh                Activities are carried out and supervised by the
Departemen Mining section Geotech &                   Department of Mining section Geotech &
Exploration Development.                              Exploration Development.

3. 5. KEMAJUAN EKSPLORASI                             3. 5. EXPLORATION PROGRESS
Page 13
Pada Kuartal-III 2026 tidak ada kegiatan            In The 3rd Quarter of 2026, there are no
pemboran eksplorasi, namun berikut kegiatan         exploration drilling activities, but the following
tim geologi selama Kuartal-III 2026:                are the activities of the geological team during
1. Melakukan monitoring di area Pit Aktif, baik     the 3rd Quarter of 2026:
    monitoring kestabilan lereng maupun            1. Conducted monitoring in active pit areas,
    monitoring batu bara untuk memantau               covering both slope stability monitoring and
    kesesuaian antara Model Geologi & aktual          coal seams to ensure alignment between the
    di lapangan.                                      geological model and actual field conditions.
2. Update Model Geologi berdasarkan data           2. Updated the geological model based on coal
    roof/floor batu bara dari data survey aktual       roof/floor data derived from actual survey
    dan dari data pemboran                             and drilling data.
3. Analisa kestabilan lereng di area Low Wall      3. Slope stability analysis for active pit low
    Pit Aktif & area disposal.                        walls and disposal areas.
4. Monitoring kestabilan lereng untuk pit dan      4. Pit and disposal slope stability monitoring
    disposal dengan titik pantau prisma dan            using monitoring point prism and SSR
    SSR (Slope Stability Radar).                       (Slope Stability Radar).
5. Menindaklanjuti beberapa IUP yang               5. Followed up on several potential IUP for
    potensial untuk dilakukan eksplorasi detail.       detailed exploration.
6. Melakukan kajian geoteknik pada area            6. Conducting a geotechnical assessment of
    rencana pengembangan pit & rencana                 the proposed pit development areas and
    pembangunan infrastruktur oleh pihak               planned infrastructure development by an
    konsultan eksternal.                               external consultant.

3. 6. RENCANA KEGIATAN                              3. 6. PLANS FOR FURTHER
     EKSPLORASI SELANJUTNYA                              EXPLORATION ACTIVITIES

Rencana ABN pada Kuartal-IV 2026, tidak ada         In the 4th Quarter of 2026, ABN has no
rencana pemboran eksplorasi.                        exploration drilling plan.
Kegiatan eksplorasi dan geologi difokuskan          Exploration and geology activities are focused
pada kegiatan berikut:                              on the following activities:

1. Pengambilan sampel untuk update kualitas         1. Sampling for coal quality updates &
   batu bara & model geologi di area Pit Aktif.        geological models in the Active Pit area.
2. Monitoring di area Pit Aktif untuk               2. Monitoring in the Active Pit area to monitor
   memantau kesesuaian antara Model                    the suitability between actual and
   Geologi dan aktual di lapangan.                     Geological Models in the field.
3. Melakukan      update     Model      Geologi     3. Update geological model based on
   berdasarkan data channel sampling, data             sampling channel, actual survey data and
   survey aktual dan data pemboran.                    drilling data.
4. Rekonsiliasi antara Model Geologi terhadap       4. Reconciliation between Geological Model
   data survey actual.                                 to actual survey data.
5. Monitoring geotek di area Pit & Disposal.        5. Geotech monitoring in Pit & Disposal Areas.
6. Analisa kestabilan lereng pit dan disposal.      6. Slope stability analysis for Pit and Disposal.
7. Pemasangan monitoring point untuk                7. Monitoring point installation for slope
   pemantauan pergerakan lereng.                       movement monitoring program.
8. Melakukan        penyusunan          laporan
                                                    8. Prepare the Mineral Resources and
   sumberdaya dan cadangan sesuai dengan
   standar KCMI oleh konsultan eksternal.              Reserves Report in accordance with the
9. Melakukan kajian hidrogeologi pada area             KCMI Standard by an external consultant.
   rencana pengembangan pit oleh konsultan          9. Conduct a hydrogeological study in the
   eksternal.                                          planned pit development area by an
Page 14
external consultant.

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