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Page 1
  PT TBS Energi Utama Tbk
Kuartal-I/ the 1 Quarter of 2026
  PT TBS Energi 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    pertambangan       Company") is a coal mining company
batubara yang melakukan kegiatan           conducting      mining    activities in
penambangan di daerah Sangasanga,          Sangasanga area, Kutai Kartanegara
Kabupaten Kutai Kartanegara, Provinsi      Regency, East Kalimantan, where the
Kalimantan Timur, dimana area konsesi      concession area of the three
ketiga   anak    perusahaan     terletak   subsidiaries is located side by side. All
berdampingan. Seluruh infrastruktur        the supporting infrastructure of mining
pendukung operasional penambangan          operations such as coal hauling roads,
seperti    jalan   angkut    batubara,     offices, workshop, coal-only jetty and
perkantoran, perbengkelan, pelabuhan       other infrastructures are located in
khusus batubara dan infrastruktur          Kutai Kartanegara Regency, East
lainnya berada di daerah Kabupaten         Kalimantan.
Kutai Kartanegara, Provinsi Kalimantan
Timur.

Perseroan mempunyai 3 (tiga) anak          The     Company       has   3   (three)
perusahaan yang bergerak di bidang         subsidiaries engaged in the coal mining
pertambangan batubara, terletak di         sector, located in the Sangasanga area,
daerah Sangasanga, Kabupaten Kutai         Kutai Kartanegara Regency, East
Kartanegara, Provinsi Kalimantan Timur.    Kalimantan.         The      company's
Adapun ketiga      anak perusahaan         subsidiaries are:
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)

Dalam rangka memenuhi Ketentuan            In order to comply with the Provisions
III.1.6, Peraturan Nomor I-E tentang       III.1.6,  Regulation     Number     I-E
Kewajiban Penyampaian Informasi,           concerning      Information   Delivery
Lampiran Keputusan Direksi PT Bursa        Obligations, Attachment to the Decree
Efek       Jakarta   Nomor      Kep-       of the Board of Directors of PT Bursa
00066/BEI/09-2022       tanggal   30       Efek      Jakarta     Number     Kep-
September 2022, maka bersama ini           00066/BEI/09-2022               dated
kami sampaikan Laporan Kegiatan            September 30, 2022, we here jointly
Eksplorasi Perseroan untuk Kuartal-1       submit the Company's Exploration
2026.                                      Activity Report for the 1st Quarter of
                                           2026.
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                  BAB I                                        CHAPTER I
              PENDAHULUAN                                    INTRODUCTION


I. Latar Belakang                               I. Background

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

Pengusahaan pertambangan karena sifat           Strive of the Mining business because of
kegiatannya      pada    dasarnya      selalu   the nature of its activities basically always
menimbulkan perubahan pada alam                 cause changes in the nature of its
lingkungannya. Di balik perubahan pada          environment. Behind the changes in nature
alam dan lingkungannya, suatu kenyataan         and the environment, it is also a fact that
pula bahwa usaha pertambangan telah             mining businesses have succeeded in
berhasil   meningkatkan       kesejahteraan     improving human welfare by providing raw
manusia dengan menyediakan bahan baku           materials for industry, energy, and others.
untuk industri, energi, dan lain-lain.




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

Pada    Kuartal-1    2026,    pelaksanaan   In The 1st Quarter of 2026, the
pekerjaan yang dilakukan oleh TMU telah     implementation of work carried out by TMU
menyerap tenaga kerja sebanyak 92 orang     has absorbed a workforce of 92 people
sedangkan untuk kontraktor dan sub-         while for contractors and sub-contractors
kontraktornya 770 orang dan dibagi          770 people and divided into 2 shifts of
menjadi 2 shift kerja. Kontraktor tambang   work. The mining contractor used is PT
yang digunakan adalah PT Multindo Prima     Multindo Prima Teknik (MPT). Mining is
Teknik (MPT). Penambangan yang              done by surface open pit mining system
dilakukan dengan sistem tambang terbuka     with truck and shovel method.
(surface open pit mining) dengan metode
truck dan shovel.

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

Kegiatan pengelolaan dan pemantauan          Environmental       management        and
lingkungan yang dilakukan TMU meliputi       monitoring activities carried out by TMU
kegiatan penghijauan yang dilakukan di       include greening activities carried out at
tanggul jalan, tanggul stockpile, tanggul    the road embankment, embankment
depan timbangan, settling pond, waste        stockpile, front embankment scales,
dump dan bench office baru. Pada saat ini,   settling pond, waste dump and new bench
TMU juga melakukan pengelolaan dan           office. Currently, TMU also manages and
pemantauan kualitas air, debu, kebisingan,   monitors water quality, dust, noise, B3
limbah B3 dan limbah domestik, serta         waste and domestic waste, as well as
pemantauan tingkat erosi.                    monitoring erosion rates.


I. 2. PT INDOMINING (“IM”)

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

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

Pada Kuartal-1 2026, sumber daya             As of 1st Quarter 2026, human resources
manusia yang bekerja dalam kegiatan          working in IM's operational activities
operasional IM mencapai 258 tenaga kerja     reached 258 workers including contractors
termasuk kontraktor dan sub-kontraktor.      and sub-contractors. Of those 258 people,
Dari 258 orang tersebut sekitar 80%          about 80% are local workers to support
merupakan tenaga kerja lokal sebagai         community development programs with
penunjang        program     community       the aim of improving the welfare of the
development dengan tujuan untuk              communities around the mine.
meningkatkan kesejahteraan masyarakat
di sekitar tambang.
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Produk batubara IM memiliki kualitas           IM coal products have quality between
antara 4200-5600 GAR dengan total              4200-5600 GAR with total sulphur
sulphur antara 0.2% - 2.0%. Produk cukup       between 0.2% - 2.0%. The product is quite
bersaing di dalam pasar internasional          competitive in the international and
maupun domestik.                               domestic markets.


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

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

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

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

Pada Kuartal-I 2026, sumber daya manusia   In The 1st Quarter of 2026, human
yang terlibat dalam kegiatan operasional   resources involved in ABN's operational
ABN mencapai sekitar 508 orang, yang       activities reached about 508 people,
terdiri dari 221 orang tenaga kerja pada   consisting of 221 workers in ABN and 287
ABN dan 287 orang tenaga kerja pada        workers in contractors and sub-
kontraktor maupun sub-kontraktor.          contractors.

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       contractors and sub-contractors currently
saat ini telah menampung tenaga kerja      have accommodated local workers in
lokal    Kecamatan    Sangasanga    &      Sangasanga District & Muara Jawa District,
Kecamatan Muara Jawa, Kabupaten Kutai      Kutai Kartanegara Regency approximately
Kartanegara kurang lebih 80% dari          about 80% of the labor needs, while the
kebutuhan tenaga kerja, sedangkan          remaining about 20% comes from outside
sisanya sekitar 20% berasal dari luar      the area of the two sub-districts.
daerah dua kecamatan tersebut.
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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-1 2026 tidak ada kegiatan         In the 1st 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           temporarily not carried out because the
karena data kualitas yang sudah ada masih      existing quality data is still sufficient.
cukup.


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

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


Sampling                                       Sampling

Tim geologi juga melakukan sampling            Geologies team also sampling seams in the
seam–seam di pit guna mengetahui               pit to find out the updated quality of the
kualitas ter update dari seam–seam yang        seams that will be mine.
akan ditambang.
Metode yang digunakan adalah:                  The methods used are:
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1. Jarak antar titik sampling maksimal 20        1. The distance between sampling points
   m per seam searah strike bukaan                  maximum 20 m per seam direct strike
   batubara yang akan diambil (getting).            coal openings to be taken (getting).

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

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

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


                                   Q1 2026                        Year To Date
     Biaya Operasional      Anggaran     Realisasi           Anggaran      Realisasi
    Operating Expense         Budget         Realization      Budget         Realization
                               (IDR)           (IDR)           (IDR)           (IDR)
   Januari/ January         4,600,000            0          50,000,000           0
   Februari/ February       4,600,000            0          50,000,000           0
   Maret/ March             4,600,000            0          50,000,000           0

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

1. 4. PELAKSANAAN DAN                            1. 4. IMPLEMENTATION AND
      PENGAWASAN                                       SUPERVISION
Pengawasan Test Pit/Trenching dan                Supervision of Test Pit/ Trenching
sampling batubara di pit TMU dilakukan           sampling of coal in the TMU pit conducted
oleh Geologist TMU.                              by TMU’geologist.
Page 11
1. 5. KEMAJUAN EKSPLORASI                      1. 5. EXPLORATION PROGRESS

Kesimpulan    Eksplorasi   TMU    Kuartal-1    Conclusion of TMU Exploration in the 1stt
2026                                           Quarter of 2026

Kegiatan eksplorasi untuk kuartal ke- 1 ini    Exploration activities for 1st quartal is
berupa pengeboran cropline:                    cropline drilling:

1. Tim Geologist memonitoring seam-            1. The Geologist team monitors the seams
   seam yang tertambang di pit aktif              mined in the active pit, mainly for their
   terutama untuk kemenerusan dan                 continuity and thickness.
   ketebalannya.


1. 6. RENCANA KEGIATAN                         1. 6. PLANS FOR FURTHER
      EKSPLORASI SELANJUTNYA                         EXPLORATION ACTIVITIES
Rencana Kegiatan Divisi Geologi Kuartal-2      The Geological Division Plan for 2nd
2026:                                          Quarter 2026:

1. Melakukan       pembaharuan/updating        1. Updating the Geological model based
   model Geologi berdasarkan data                 on monthly roof/floor updating data
   updating roof/floor bulanan dari data          from pit survey data and cs holes data
   survey Pit serta cs_holes dari data            from coal sampling channel data. The
   channel sampling batubara. Hasil dari          results of this model update are then
   pembaharuan model ini kemudian                 sent to the mine plan engineering
   dikirim ke bagian mine plan engineering        section as a basis for submissions for
   sebagai dasar acuan untuk pembuatan            making pit designs for next month.
   design pit untuk bulan depan.

2. Memonitoring adanya anomali pada            2. Monitoring the presence of anomalies in
   suatu bukaan PIT yang aktif.                   an active PIT aperture.

3. Tim geologist akan melakukan sampling       3. The geological team will conduct
   pada bukaan seam seam yang berada di           sampling on the seam openings in the
   pit     aktif   terutama       mengontrol      active pit, especially to control changes
   perubahan nilai total sulfur, persentase       in the Total Sulfur value, Ash
   nilai ash dan nilai kalori di seam –seam       percentage value and Calorie value in
   berkalori tinggi baik ke arah down dip         high-calorie seams both down dip and
   maupun ke arah strike nya.                     towards the strike.

4. Memonitoring kualitas dari seam –seam       4. Monitoring the quality of seams that is
   yang tertambang di bulan April – Juni          mined in April until June 2026,
   2026 terutama dalam hal perubahan              especially in terms of changes in TS
   nilai TS seiring penurunan elevasi dari        value in line with the decrease in
   masing–masing         seam        yang         elevation of each seam that is mined.
   tertambang.
                                               5. Quality data update based on mining
Page 12
5. Update data kualitas berdasarkan                 progress on seam–seam target in
   kemajuan penambangan pada seam–                  previous month.
   seam target di bulan sebelumnya.



II. 2. PT INDOMINING (“IM”)

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

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

Pemboran geoteknik dilakukan juga                Geotechnical drilling is also carried out
dengan menggunakan metode Standard               using the Standard Penetration Test (SPT)
Penetration Test (SPT). Prinsip kerja SPT        method. The working principle of SPT is to
adalah dengan memukul sebuah tabung              hit a standard tube into a drill hole 45 cm
standar ke dalam lubang bor sedalam 45           deep using a hammer weighing 63.5 kg
cm menggunakan palu dengan berat 63.5            that falls freely from a height of 76 cm.
kg yang jatuh bebas dari ketinggian 76 cm.       What counts is the number of blows to
Yang dihitung adalah jumlah pukulan untuk        penetrate as deep as 15 cm. The number of
melakukan penetrasi sedalam 15 cm.               blows used is penetration as deep as the
Jumlah pukulan yang digunakan adalah             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 1st
Kuartal-1 2026 sebagai berikut:                  Quarter of 2026 as follows:


                                     Q1 2026                     Year To Date
      Biaya Operasional       Anggaran     Realisasi         Anggaran     Realisasi
      Operating Expense        Budget        Realization      Budget        Realization
                                 (IDR)         (IDR)           (IDR)           (IDR)
     Januari/ January         83,333,333          -         83,333,333            -
     Februari/ February       83,333,333          -        166,666,666            -
     Maret/ March             83,333,333          -        249,999,999            -
Page 13
2. 4. PELAKSANAAN DAN                             2. 4. IMPLEMENTATION AND
     PENGAWASAN                                         SUPERVISION
Kegiatan    Pemboran    diawasi    oleh           Drilling activities are supervised by the
Departemen     Engineering      Section           Department of Engineering geologist
Geologist.                                        section.

2. 5. KEMAJUAN EKSPLORASI                         2. 5. EXPLORATION PROGRESS
Pada Kuartal-1 2026 belum ada kegiatan            As of the 1st Quarter of 2026, there are no
pemboran lanjutan. Namun ada beberapa             further drilling activities. But there are
kegiatan Geologi yang berlanjut dilakukan,        several geological activities that continue
diantaranya:                                      to be carried out, including:

1. Melakukan       pembaharuan/updating           1. Updating the Geological model based
   model Geologi berdasarkan data                    on monthly roof/floor updating data
   updating roof/floor bulanan dari data             from pit survey data and cs_holes data
   survey Pit serta cs_holes dari data               from coal sampling channel data, and
   channel sampling batubara, dan                    supervision in the activities of taking
   pengawasan          dalam      kegiatan           roof/floor measurement data and
   pengambilan        data     pengukuran            cs_holes.
   roof/floor serta cs_holes tersebut.


2. Melakukan kegiatan channel sampling            2. Conducting channel sampling activities
   serta pengukuran tebal aktual batubara            as well as actual thick measurement of
   di lokasi Pit AB Blok 15 & sekitarnya             coal at the pit AB location Block 15 &
   untuk keperluan pembuatan data                    surrounding areas for the purposes of
   channel sampling untuk support                    making data sampling channels to
   pembaharuan/updating model Geologi                support the renewal/updating of
   dan variasi kualitas batubara dari coal           geological models and variations in the
   inventory yang akan ditambang.                    quality of coal from coal inventory to be
                                                     mined.

3. Melakukan analisis kestabilan lereng di        3. Perform slope stability analysis in the
   area pit aktif Pit, baik pada sisi low wall,      active pit area, both on the low wall side,
   high wall maupun sidewall serta                   high wall and sidewall and disposal IPD
   disposal IPD border Selatan, kaitannya            South border, related to know the value
   untuk mengetahui nilai safety factor              of safety factor (FoS) to control the
   (FoS) untuk kontrol pembentukan                   formation of Active Pit design to be
   desain Pit Aktif supaya stabil dan aman.          stable and safe.


4. Melakukan update kajian geoteknik dan          4. Updating the geotechnical study and
   pembaruan kajian hidrogeologi di area             renewing the hydrogeological study
   pit dan sekitarnya                                within the pit area and its surroundings.

2. 6. RENCANA KEGIATAN                            2. 6. PLANS FOR FURTHER
     EKSPLORASI SELANJUTNYA                            EXPLORATION ACTIVITIES
Page 14
IM pada periode Kuartal-2 2026 belum           IM for the 2nd Quarter of 2026 doesn’t have
merencanakan    melakukan       aktivitas      planned to resume further exploration
kembali pengeboran eksplorasi lanjutan,        drilling activities, be it infill drilling or
baik itu pengeboran infill maupun              Geotechnical drilling in the IM concession
pengeboran Geoteknik di area konsesi IM.       area.

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


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

3. 1. DAERAH EKSPLORASI                        3. 1. EXPLORATION AREA
Pada Kuartal-I 2026, ABN melakukan             In the 1st Quarter of 2026, ABN conducted
pengujian cone penetration test (CPT) di       cone penetration test (CPT) at the planned
lokasi rencana infrastruktur & high wall Pit   infrastructure & high wall Pit 6B and
6B dan update model geologi berdasarkan        updated the geological model based on
data channel sampling serta data roof &        channel sampling data and actual roof &
floor aktual dari hasil pengukuran survey,     floor measurements from survey results, as
serta melakukan rekonsiliasi model geologi     well as reconciling geological model
terhadap data survey aktual.                   reconciliation against actual survey data.

Selain kegiatan eksplorasi di dalam konsesi    Apart from exploration activities within the
IUP ABN, tim eksplorasi juga melakukan         ABN IUP concession, the exploration team
studi prospeksi dan review terhadap            also carried out prospecting studies and
potensi pengembangan bahan galian di           reviews of the potential for developing
luar IUP ABN. Pada kuartal-I, tim eksplorasi   minerals outside the ABN IUP. In the 1st
telah menyelesaikan sebanyak 4 desk studi      Quarter, the exploration team completed 4
prospeksi terhadap potensi batubara, pasir     of prospecting studies on the potential
kuarsa, dan emas.                              coal, quartz sand, and gold.

3. 2. METODE PENGUKURAN                        3. 2. MEASUREMENT METHODS
Channel sampling dilakukan dengan              Channel sampling is done by mapping and
mapping dan pengukuran aktual batubara         actual measurement of coal that has been
Page 15
yang telah terekspos (thickness, strike,           exposed (thickness, strike, dip, collar) then
dip, collar) kemudian diambil sampel               taken as a composite sample to be
secara komposit untuk dilakukan analisa            analyzed for coal quality as the basis for
kualitas batubara sebagai dasar untuk              geology model update in line with the
update model geologi seiring dengan                progress of the mine. Channel sampling in
kemajuan tambang. Channel sampling                 the 1st Quarter of 2026 was conducted at
pada Kuartal-I 2026 dilakukan pada seam            seam S41U Pit 6 Ext
S41U Pit 6 Ext

3. 3. BIAYA EKSPLORASI                             3. 3. EXPLORATION COSTS
Biaya Eksplorasi ABN yang dikeluarkan di           ABN Exploration Costs issued in The 1st
Kuartal-1 2026 sebagai berikut:                    Quarter of 2026 as follows:


       Biaya                 Q1 2026                             Year To Date
     Operasional     Anggaran       Realisasi              Anggaran        Realisasi
      Operating        Budget         Realization           Budget           Realization
      Expense           (IDR)              (IDR)             (IDR)              (IDR)
    Januari/
                    400.200.000     398.960.000          400.200.000       398.960.000
    January
    Februari/
                    250.000.000     245.000.000          650.200.000       643.960.000
    February
    Maret/
                    250.000.000     245.000.000          900.200.000       888.960.000
    March


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

3. 5. KEMAJUAN EKSPLORASI                          3. 5. EXPLORATION PROGRESS
Pada Kuartal-I 2026 team geologi telah             In The 1st Quarter of 2026, the geology
menyelesaikan 28 titik penyelidikan cone           team completed 28 cone penetration test
penetration test (CPT).                            (CPT) investigation points.
Selain   kegiatan    penyelidikan   cone           In addition to the Cone Penetration Test
penetration test (CPT), berikut kegiatan           (CPT) investigations, the following
team geologi selama Kuartal-I 2026:                activities were conducted by the geology
                                                   team during Q1 2026:
1. Melakukan monitoring di area Pit Aktif,
   baik monitoring kestabilan lereng                1. Conducted monitoring in active pit
   maupun monitoring batubara untuk                    areas, covering both slope stability
   memantau kesesuaian antara Model                    monitoring and coal seams to ensure
   Geologi & aktual di lapangan.                       alignment between the geological
                                                       model and actual field conditions.
2. Update Model Geologi berdasarkan                 2. Updated the geological model based on
Page 16
   data roof/floor batu bara dari data          coal roof/floor data derived from actual
   survey aktual dan dari data pemboran         survey and drilling data.
3. Analisa kestabilan lereng di area Low     3. Slope stability analysis for active pit
   Wall Pit Aktif & area disposal.              low walls and disposal areas.
4. Monitoring kestabilan lereng untuk pit    4. Pit and disposal slope stability
   dan disposal dengan titik pantau prisma      monitoring using monitoring point
   dan SSR (Slope Stability Radar).             prism and SSR (Slope Stability Radar).
5. Menindaklanjuti beberapa IUP yang         5. Followed up on several potential IUP for
   potensial untuk dilakukan eksplorasi         detailed exploration.
   detail.

3. 6. RENCANA KEGIATAN                       3. 6. PLANS FOR FURTHER
     EKSPLORASI SELANJUTNYA                       EXPLORATION ACTIVITIES
Rencana ABN pada Kuartal-II 2026, tidak      In the 2nd Quarter of 2026, ABN has no
ada    rencana   pemboran      eksplorasi.   exploration drilling plan. Exploration and
Kegiatan    eksplorasi    dan     geologi    geology activities are focused on the
difokuskan pada kegiatan berikut:            following activities:

1. Pengambilan sampel untuk update           1. Sampling for coal quality updates &
   kualitas batubara & model geologi di         geological models in the Active Pit area.
   area Pit Aktif.                           2. Monitoring in the Active Pit area to
2. Monitoring di area Pit Aktif untuk           monitor the suitability between actual
   memantau kesesuaian antara Model             and Geological Models in the field.
   Geologi dan aktual di lapangan.
3. Melakukan update Model Geologi            3. Update geological model based on
   berdasarkan data channel sampling,           sampling channel, actual survey data
   data survey aktual dan data pemboran.        and drilling data.
4. Rekonsiliasi antara Model Geologi         4. Reconciliation between Geological
   terhadap data survey actual.                 Model to actual survey data.
5. Monitoring geotek di area Pit &           5. Geotech monitoring in Pit & Disposal
   Disposal.                                    Areas.
6. Analisa kestabilan lereng pit dan         6. Slope stability analysis for Pit and
   disposal.                                    Disposal.
7. Pemasangan monitoring point untuk         7. Monitoring point installation for slope
   pemantauan pergerakan lereng.                movement monitoring program.

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Names mentioned 14 people and organisations named in the text · linked when the evidence is strong

linked org TBS Energi Utama Tbk p.1 ×29
linked org Sukses Makmur p.8
unresolved org PT Trisensa Mineral Utama p.2 ×5
unresolved org PT Indomining p.2 ×6
unresolved org PT Adimitra Baratama Nusantara p.2 ×4
unresolved org Menteri Investasi p.5
unresolved org Koordinasi Penanaman p.5
unresolved org PT Multindo Prima p.5
unresolved org PT RPP p.6
unresolved org PT RPP Contractors Contractors Indonesia p.6
unresolved org PT ABN p.7 ×2
unresolved org PT Gunungmas Sukses p.7
unresolved org PT. Gunungmas Sukses Makmur p.8
unresolved org Departemen Mining p.15

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