20250901_MEDC_Public Expose_31936285_lamp1.pdf

(DP Public Expose 2025

MEDCOENERGI

Oyong Platform, Sampang PSC, East Java

Highlights
Operational Performance
Financial Performance
Outlook

Appendix

12
15
17

Tha following presentation has bean propared by PT Medco Energi Internasional Tbk. (“Campany" or “MedeoEnergi") and contains certain prajections, plans, business stratogiss, policios of the Company and industry data in which the Company aperates in, which could be traatod as forward
looking statements within the meaning of applicable law. Any forward-looking statements, by their nature, invove risks and uncertainties that coukd prove to be incorrect and cause actual results to differ materialy from those expressed or impliad in these statements. Tha Company does not

Guarantee that any action, which may have bean taken in reliance on this document will bring spacific rasults as expactad. The Company disclaims any Obligation to ravise fo1

rd-Iooking statements to reflect future events or circumstances

Tho use by MedcoEnargi of any MSCI ESG Research LLC ar its affiliatos (“IMSCI") data, and tha use of MSCI logos, tradomarks, service marks or index names herein, do not constitute a sponsorship, endorsement, recommendation, ar promotion of MedcoEnergi by MSCI. MSCI services and data

are the property of MSCI or it

information providers, and are provided 'as-is' and without warranty. MSCI names and logos are trademarks or service marks of MSCI

MEDCOENERGI

5—

Ci 1H 2025 Operating & Financial Highlights

MEDCOENERGI

Production &  Capex & Consolidated
Power Sales Cash Cost & RG Debt

143 1 s193mn $3.Dbn

Oil & Gas : $178mn
mboepd Power :$15mn

$2.8bn

US$/boe

First oil lift in June from the Natuna Forel field Amman smelter began operations
Ijen Geothermal & East Bali Solar PV COD 2024 Final Dividend of IDR 25/share
Acguisition of Repsol's 2474 Interest in Corridor PSC Active program of share buybacks

Ci

MEDCOENERGI

Acguisition of Repsol's 2476 Interest in the Corridor PSC

A total consideration of US$ 425 million, completed in July 2025

Transaction Highlights

Corridor Asset Highlights

“ Increased MedcoEnergi ownership to 7096 from 4696

- US$425mn purchase price funded with 3496 cash and 6696 debt,
with an economic date of 1 January 2025

“ Immediate production impact -25 mboepd

“ Attractive valuation at -US$7/boe for -63 mmboe acguired 2P
reserves

» At mid-cycle price of US$65/bbl generates additional EBITDA of
US$145mn in 2026, with US$90mn from fixed-price gas contracts

“ Post acguisition RG Net Debt to EBITDA at mid-cycle price
maintained below 2.5x

Net Production! (mboepd)

152 155-160
2024 2025F
JB Existing
1) 2025 Production annualized daily rate from 1 August 2025

2) Corridor reserves increased, based on the recertification report dated 18 June 2025

“ Fully contracted with take-or-pay gas sales contracts to 7 buyers

“ Operated by Medco, successfully extended the PSC to 2043 under
the Cost Recovery scheme

“ Ongoing US$50mn seismic program to support future gas
development over the next decade

“ Major Well Projects: Suban Compressor Revamping, Corridor
Drilling Campaign (Corridor ACD2X), LTR Gas Development, and
Sambar Gas Development

“ Installed -1MWp rooftop solar PV across Suban, Grissik, Dayung,
and Sumpal areas, reducing emissions by -934 tCO,e annually

2P Reserves (mmboe)

184

107

2024 2024?
24” Corridor

2 La
@ Operational Performance

MEDCOENERGI

Belida Platform, Block B, Riau Islands

Ci Oil & Gas Operational Results

MEDCOENERGI -effectively maintaining 5. and replenishing reserves

g 1H Oil & Gas Production (mboepd) Oil & Gas Cash Cost (US$/boe)

155-160

Production!

Oil, MBOPD 403 404 (0) 422 (4) M3 oo om
Gas, MMSCFD 5585 6001 (7) 6066 (8) 6034

Lifting/Sales

Oil Lifting, MBOPD 400 399 0 414 (8) 406

Gas Sales, BBTUPD 5264 5617 (6) 5622 (6) 5619

Oman Service Contract, MBOPD 9.0 91 (1) 88 2 8.9

2021 2022 2023 2024 4H24 1H 25 2025 2021 2022 2023 2024 1H24 1H25 2025
Reserves Guid. Guid.
2P Reserve Life Index, years 107 104 3 93 15 104 IM Liguids IM Gas Indexed Priced Gas IMB Fixed Priced Gas —O- Realized Oil Price
S-yr 2P RRR, 96 1630 187.0 (13) 1520 7 1870 Oil & Gas Capex (USSm Net 2P Reserves, MMBOE
5-yr 2P FD&A, US$/BOE 54 50 7 54 (1) 50 400 !

365
481

BI 493 an 333
ESG Indicators2? 262 389
231 355 |
Scope 1&2 GHG emissions, million tCOze 3.8 152 178 336 376 327
Scope 182 GHG emissions intensity (tCO2 eg/1,000 TOE HC 303 212 ct
Production) 146 184 17 na
Methane emissions, thousand tCO»e 88.9 -

2021 2022 2023 2024 .1H24 1H25 2025 H
E&P Recordable Incident Rate (TRIR) 0.1 Guid. 2071 2022 2023 2074 :IH20241H2025

IBI Oil & Gas Oman 60 JB Liguids MM Gas

1) Includes Oman Service Contract 3) Based on the operational control approach: GHG refers to Greenhouse Gas
2) ESG Indicators have been assured by EY, for the scope and calculation methodology, please refer to 2024 Sustainability Report

On Operational Progress on Key Oil & Gas Assets

MEDCOENERGI Maximizin

Block B

“ The Forel and Terubuk fields, inaugurated by President
Prabowo in May 2025, will produce up to 20 mbopd and 60
mmscfd, - 30 mboepd' total.

D
«

“  Terubuk Lonstream, Terubuk M drilling completed expected
onstream in 03 2025

“ PSC Extension application in progress

Bangkanai

“ Gross production Phase | facilities 20 mmscfd ramping up to
55 mmscfd with Phase II, targeting onstream in 01 2029

“ PSC Extension application in progress

“  Completed -130km Pipeline Study for 35 bbtud gas offtake to
mini LNG plant in Melak

“  Potential to monetize further -300 bcf uncommitted gas

1) Gross 1006 participating interest

Ci

MEDCOENERGI

Power Operational Results

Accelerating growth in renewables power

2H 1H

Metrics 2024 2024

IPP Sold and O&M Capacity'

IPP Sold, GWh 1994 2105 (5) 2,003 (0) 4,108
Renewables, GWh 497 422 18 409 21 831
Non Renewables, GWh 1,497 1,683 (11) 1,594 (6) 3,277

08&M Capacity, MW 2,060 1,975 4 1,925 7 1,975

ESG Indicators2?

Renewable installed capacity (Yo) 3

Scope 182 GHG emissions (thousand tCOze) 1,381
Scope 1&2 GHG emissions intensity (tCO» eg/MWh) 0.5
Power Recordable Incident Rate (TRIR) 0.4

IPP Power Sold, Gross 10076, GWh Gross Operating Installed Capacity, MW

4,300

3,993 4155 4,108 | 3038

1,000 2864 2851 2901 ' 2,851

2,003 1,994

2021 2022 2023 2024 1H24 1H25 2025

2021 2022 2023 2024 1H24 1H25
Guid.
JMM Renewables IPP IM Gas IPP IRI pp MN oz
Power Capex (US$mn) 0&M Power Capacity, Gross 10096, MW
2. NX

1,925 1,925 1975 | 1,925 2,060

2021 2022 2023 2024

1H 24

1H25 2025 2021 2022 2023 2024
Guid.

1H 24

1H 25

IMMI Renewables OM MMI OM

1) Gross 10086 participating interest and includes Sarulla production

2) ESG Indicators numbers have been assured by EY: for the scope and calculation methodology, please refer to 2024 Sustainability Report

3) Based on the operational control approach: GHG refersto Greenhouse Gas
4) Eguity share

“| Completion of Phase 1 New Power Assets

MEDCOENERGI

Ijen Geothermal

“Ijen Banyuwangi, Bondowoso, East Java
“ PPA Contract 110MW, sold to PLN

“ Phase1 capacity 33MW

“ Phase 2t0o expand capacity to 55MW

“ COD 012025

“ Project cost: US$140mn

“ Medco 5175, Ormat 49Y6

East Bali Solar PV

« Kubu, Karangasem, East Bali
“ PPA Contract 25MWp, sold to PLN
“- COD 022025
Ns “Project cost: Dea |
, 5 “ Medco 5146, Solar Philippines 494

li N N N ' : : “ Phase 2 under review

( Tracking Our Climate Commitments and ESG Performance

E&P Scope 1&2 GHG Emissions ntCO2
307o reduction from Base Year 2019

MEDCOENERGI

2019 2020 2021 2022 2023 2024 2025 2030

E&P Methane Emissions'3, thousand tCO2e
46” reduction from Base Year 2019

2019 2020 2021 2022 2023 2024 2025 2030

Renewable Mix Install acity2 (Yo)

1H 2025 Renewables Mix Installed Capacity 27 ACHIEVED

2019 2020 2021 2022 2023 2024 2025 2030
IMEI Renewable IPP Capacity MW Gas IPP Capacity

Based on the operational control, including assets acguired post 2019
? Power renewable eguity share installed capacity. Government of Indonesia target 2025: 2346 and 2030: 2546
3 The number is assured by EY: for the scope and calculation methodology, please refer to 2028 Sustainability Report

AAA

AA

BBB

BB

MSCI
ESG RATINGS

cec| 8 | »» | nan

AIM KAA

As of 2024, PT Medco Energi
Internasional Tbk received an MSCI
ESG Rating of AA.

Dec-20 Nov-21

MSCI Disclaimer Statement

Dec-22 Nov-23 Nov-24 provided on page 2

ASEAN Risk Champion
Awards 2025

MedcoEnergi was named Runner-up in
Category 2. recognizing excellence in
integrated risk management to address
complex business challenges and
opportunities

(Organized by ERMA: Category 2:
Companies with sales turnover »USD 75
milion or »200 employees: 1 of 5 ASEAN
finalists)

We support TCFD|

IDX

—. fe

MEDC admitted to:

“ IDX LO45 Low Carbon
Leaders since Nov 2022

“ ESG Sector Leaders IDX
KEHATI since Dec 2024

CDP Score Report
Climate Change

2021” 2022 2023 2024
MedcoEnergi's
Oil & Gas
3 ion &

.. ee
« INK KN
Average

Average
Performance

1 First time reporter, score not published
Leadership (A/A-) Implementing current best practices
Management (B/B-) — : Taking coordinated action on climate issues
Awareness (C/C-) Knowledge of impacts on, and of, climate issues

Disclosure (D/D-) Transparent about climate issues

( Financial Results

MEDCOENERGI Financial resilience with

Profit & Loss (US$ mn) aa 1 2024 aa

Revenue 1,138 1,234 (8) 1,165 (2) 2,399
Oil & Gas 1,036 1,137 (9) 1,043 (1) 2,180
Power 87 4 18 (23) 205 1255 1,272
Services 12. 100 19 4 182 15
Average Realized Price
Oil, US$/boe 695 750 (7) 808 (14) 780
Gas, US$/MMBTU 10-10 (1) 70 (0) 7.0 2021 2022 2023 2024 1H 25 2021 2022 2023 2024 ' AH
Fixed gas price, USS/MMBTU — 59 58 2 58 3 58  NYFY Mk MH JM Gross Debt MMI Net Debt si
Indexed gas price, USS/MMBTU 91 9.9 (8) 100 (9) 10.0 —O- Production (mboepd) —0- RG Net Debt to EBITDA
Gross Profit 436 482 (10) 451 (3) 933 1,220
SG&A (68) (121) (19) (96) 2 (217) 1116
Operating Income 338 361 (7) 355 (5) 717
EBITDA 623 622 0 650 (4) 1,272 381
Net Income 37. 166 (78) 201 (81) 367
Oil and Gas M5 149 (23) 165 (30) 315
Power OB 0 2 Un 3 3
Amman (31). 34 (192) 99 (131) 133 2021 2022 2023 2024 1H 25 2021 2022 2023 2024 1H 25
Services and Others? (7). -. (63) (26) (63) ar IM Mx
1) RG Net Debtto EBITDA calculated based on realized oil price (refer to slide 7) 2) Excludes Fuel Component

RG Net Debt to EBITDA at mid-cycle price of US$65/boe: 2021 2.9x, 2022 1.8x, 2023 2.4x, 2024 2.1x, IH 2024 2.2x and 1H 2025 1.9x 3) Others incl. headguarters, financing, and corporate adjustments

Ci Delivering Shareholder Value through Prudent Capital Management

MEDCOENERGI Strong debt discipline and access to diverse funding sources support shareholder returns

Relative Share Price' Dividend History (IDR/share) Eguity

“ Outperforming both Brent and IDX LO45
» Dividend policy driven by performance and
market conditions

il « Continuing share buyback programs

2018 2019 2020 2021 2022 2023 2024 Blah 2021 2024 Credit
— MEDC IJ Eguity — BRENT — IDX L045 IBI Final IMB Interim “ Access to diverse capital sources from
n international, regional, and local banks
Access to Capital
64 64 62 62 62 65 61 63 “ Diversified capital access providing a ready
2 i i source of additional liguidity
389 » Active refinancing initiatives to strengthen
Capital structure, maintain funding costs and
"- 6699 nh Tn ma expand balance sheet capacity
2018 2019 2020 2021 2022 2023 2024 1H 2025

Bank Loan (96) IM IDR Bond (56) MMI USD Bond (fc) — —O— Cost of Debt

1) Source: Bloomberg

Outlook

MEDCOENERGI

Senoro-Toili PSC, Central Sulawesi

MEDCOENERGI

1H 2025 Financial Results and 2025 Post-Corridor Guidance

Oil & Gas Power RG Net Debt
Production Sales to EBITDA

1H 2025 Financial Results

ROE

1.8x

1H 2025
US$ 70/boe 1.9x

Mid-cycle Price
US$65/boe

2025 Guidance

Mid-cycle price
at US$65/boe

N . . Complete key projects on Block B, Senoro Phase 2A,
(9 PSC extensions for Natuna, Sampang, and Bangkanai @ ea antem Ba temen antam

8 . . Progress expansions for Ijen Geothermal Phase 2,
KS (@) setective portfolio management GP gatam IPP3, and Bulan Solar PV
5 Continued dividend payment & debt repayments (@strenatnen energy transition capabilities

AA BEN

E

Appendix

Si

MEDCOENERGI

Energi Listrik Batam,Riau Islands

ru

MEDCOENERGI

Our Business Strategy is Delivering Long-Term Value

N

mboepd

Offshore
Production Assets

| Onshore
Production Assets

MMI

1) Reserves & Resources position as of 30 Jun 2025
2) 1H 2025 results

Clean Power

Sales
Guidance

35 Mw

Ijen Geothermal
Phase 1

4,300

GWh IPP Power Sold

25 aw

East Bali Solar PV

Onstream in 2025

Operated
Gas-Fired IPPs

1,9942 cwn IPP Power Sold

Operated Solar PV
Geothermal IPP IPP

0/2 Renewable Mix
21 Installed Capacity

-5) Copper & Gold Mining

Production 228 90

Guidance mbs Copper Koz Gold

19,805 | 18,522

Production Tonnes Sales

Smelter & Refining Operations in 02 2

“21K
23.P
EYA bana

Medco's Ownership
Stake in Amman Mineral

Copper Reserves

Gold Reserves

3) JORC Code compliant reserves estimates as of 31 Dec 2024

( Diversified Oil & Gas portfolio across Southeast Asia and the Middle East

MEDCOENERGI

16 @13

Thailand

7 &— 2 19
.

@ Production Pipeline .

@ Development — West Natuna Transportation System

@ Exploration "— Grissik-Batam-Singapore

Oil Gas "— Grissik-Duri

| Block 6. Beluga 11. Tarakan 16. Block 10 & 12, Mexico 19. Block 48, 56, 60, & KSF, Oman
2. Gorridor 1. North Sokang 12. West Bangkanai 17. Block 1 & 4, Tanzania 20. Onshore Receiving Facility, Singapore
3. South Sumatra Region 8. Sampang 13. Bangkanai 18. Block 9 Malik, Yemen 21. Bualuang, Thailand
4. Amanah 9. Madura 14. Donggi-Senoro LNG
5. South Natuna Sea Block B 10. Simenggaris 15. Senoro Toili

(DP Power and Mining portfolio

@ Installed @ Production
& Development @ Development
@ Exploration @ Exploration

Copper & Cold

Mining

1.  Sarulla Geothermal 5.  Cibalapulang Mini-hydro 9. Ijen Geothermal 12. Batu Hijau
2. Samosir Geothermal 6. Pusaka Mini-hydro 10. East and West Bali Solar PVs 13. Elang
3. Riau Gas-fired 7. DEB,MEB & ELB Gas-fired 11. Sumbawa Solar PV
4. Bonjol Geothermal 8. EPE & MPE Gas-fired

( Amman Mineral Statistics

MEDCOENERGI 1H FY
2025 2024

Mining Operations

Copper (in concentrate)

Production, Mlbs 892 2356 (62) 3949 3120 27 Ia
Sales, Mlbs - 1726 (100) 288.5 3037 (5) 264
16.5

Average Realized Price (nett),

aa -..45 (too) 42 38 10 aa 130

Gold (in concentrate) Reserves Reserves & Resources Bow Reserves &
Production, Koz 59.6 4949 (88) 8027 4635 73 Resources
Sales, Koz -. 8442 (100) 611.3 4546 34

. . EI Batu Hij
Average Realized Price (nett), IR Elang atu Hijau

US$/oz

Smelting and Refining
ata Demand D0 Sentatatmtat
Copper Cathode

- 803

- 2,263 (100) 2,397 1,948 23

Production, tonnes 19,805 — - - - - 301
Sales, tonnes 18,522 - - - - - 478 464 731

Average Realized Price (nett),
USS/Ib 9,808

Refined Gold
Production, oz
Sales, oz

Average Realized Price (nett),
US$/lb

463
398

11 56 60

20162017 2018201920202021202220232024 1H  201620172018201920202021202220232024 1H
2025 2025

( Financial Statistics

MenooEnan 022025vs 1 02 2025 vs 1H 2025 vs

Metrics Uu 02 03 O4 Ki 02 02 2024 01 2025 ul 1H 1H 2024
2024 2024 2024 2024 2025 2025 Ah of, 2024 2025 Ah

Average Realized Price

Oil 79.8 81.9 781 72.0 72.2 66.7 (19) (8) 80.8 69.5 (14)

Gas 7.0 7.0 7.0 74 7A 6.9 (2) (3) 7.0 7.0 (0)

Revenue

Consolidated 556 609 618 616 560 578 (5) 3 1165 1138 (2)

RG 502 545 570 574 511 526 (3) 3 1,047 1,037 (1)

Gross Profit

Consolidated 233 219 228 254 229 207 (6) (10) 451 436 (3)

RG 215 200 212 235 210 178 (11) (15) M5 388 (6)

EBITDA

Consolidated 328 322 330 293 332 291 (10) (13) 650 623 (4)

RG 317 310 320 284 321 210 (13) (16) 627 592 (6)

Net Income 73 128 72 94 18 20 (85) 1 201 37 (81)

Cash & Cash Eguivalent'

Consolidated 477 653 672 697 876 883 35 1 653 883 35

RG 370 524 547 586 707 709 35 0 524 709 35

Total Debt

Consolidated 3310 3,238 3321 3,300 3,430 3,458 7 1 3,288 3,458 7

RG 2,835 2,710 2,153 2,145 2,829 2,840 5 0 2,710 2,840 5

Net Debt to EBITDA

Consolidated 22 2.0 2.0 22 1.9 2.2 10 15 2.0 21 4

RG 1.9 18 17 19 17 2.0 12 19 (7 1.8 3

1) Cash & Cash Eguivalent includes restricted cash in banks

MEDCOENERGI (D

PT Medco Energi Internasional Tbk
The Energy Building 53"! Floor

SCBD Lot 11A

Jl. Jend. Sudirman, Jakarta 12190

Indonesia

P. 462-21 2995 3000

F. 62-21 2995 3001

E. investor.relations@medcoenergi.com

Website : www.medcoenergi.com