INTERRA RESOURCES LIMITED — Regulatory Filings 2026

May 15, 2026

interraresources

INTERRA RESOURCES LIMITED

Company Registration No. 197300166Z

SGX ANNOUNCEMENT

Trading Code: 5GI

15 May 2026

PRODUCTION, DEVELOPMENT AND EXPLORATION ACTIVITIES FOR THE FIRST QUARTER ENDED 31 MARCH 2026

Interra Resources Limited (the "Company" or "Interra") wishes to provide an update on its production, development and exploration activities in respect of the quarter ended 31 March 2026 ("Q1 2026").

Development and Production Activities

Myanmar: Chauk and Yenangyaung Improved Petroleum Recovery Contracts (Interra 60%)

In Q1 2026, the combined shareable production of both fields was 47,142 barrels of oil, a decrease of 20% over the fourth quarter of 2025 of 58,626 barrels of oil.

The operator, Goldpetrol Joint Operating Company Inc. ("Goldpetrol") (Interra 60%) has budgeted the drilling of two new wells for the financial year 2026, which is are scheduled for the second and third quarters of 2026.

The Chauk well completed in the first half of 2025 yielded a cumulative production of 1,782 barrels of oil from its upper zone completion as of 31 March 2026. The additional perforation of the upper zone completion has been rescheduled and is expected to be carried out in the first half of 2026.

The average wellhead production gain since the commencement of the waterflood project was approximately 312 bopd from all the oil-producing wells in twelve waterflood areas. Additional waterflood projects were performed in three areas and currently being closely monitored for further injection optimisation.

Normal field operations and improvements have been ongoing with respect to boreholes and surface infrastructure, together with scheduled maintenance of existing wells, with the objective of minimizing production declines.

"bopd" denotes "barrels of oil per day".

Interra Resources Limited 1 Grange Road #05-04 Orchard Building Singapore 239693 www.interraresources.com

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interr resources

SGX ANNOUNCEMENT

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Exploration Activities

Indonesia: Kuala Pambuang Production Sharing Contract (Interra 72.75%)

The third Additional Exploration Period ("TWE-3") with the main programme of drilling an additional exploration well, WKP-1, expired on 14 March 2025.

An application for a further exploration extension proposal was submitted to Satuan Kerja Khusus Pelaksana Kegiatan Usaha Hulu Minyak Dan Gas Bumi ("SKKMIGAS") in January 2025 and discussed with both SKKMIGAS and Minyak Dan Gas Bumi ("MIGAS"). As recorded in the minutes of the meeting, SKKMIGAS has issued a recommendation letter to the Director General of MIGAS and the Ministry of Energi Dan Sumber Daya Mineral ("ESDM") for approval by the ESDM Minister.

Workplans for the drilling of WKP-1 have been postponed, pending the extension approval. The Company will make the necessary announcement on the outcome of the extension approval in due course.

By Order of the Board of Directors of INTERRA RESOURCES LIMITED

Ng Soon Kai

Executive Chairman

About Interra

Interra Resources Limited is a Singapore-incorporated company listed on the SGX Mainboard, traditionally engaged in petroleum exploration and production (E&P). As part of a strategic forward-looking diversification, Interra is actively expanding its portfolio into sustainable and high-demand resources. The company is advancing renewable energy initiatives, including floating solar farms in Indonesia and other solar photovoltaic solutions including power plant developments as a shortlisted Long List Strategic Partner for PT PLN Nusantara Power.

Furthermore, Interra is collaborating with its Indonesian joint venture partner to develop three silica sand concessions located in West Kalimantan, Indonesia. It also holds a strategic stake of approximately 12% in ASX-listed Morella Corporation Limited, an exploration company focused on advancing critical minerals across Tier 1 jurisdictions in Australia and the United States.