20250826_DSSA_Laporan Informasi dan Fakta Material_31935070_lamp3.pdf

PT DSSR Daya Mas Sakti and FirstGen Geothermal Indonesia Form Strategic Partnership
                  to Power Indonesia’s Clean Energy Transition


Jakarta, August 27, 2025 – PT DSSR Daya Mas Sakti (“DSSR”), a subsidiary of PT Dian
Swastatika Sentosa Tbk (“DSSA”) part of Sinar Mas, has entered into an agreement to establish
a joint venture with PT FirstGen Geothermal Indonesia, a subsidiary of Energy Development
Corporation ("EDC”), part of First Gen Corporation (“First Gen”). EDC is the largest renewable
energy producer in the Philippines.

The agreement marks the beginning of a collaboration aimed at transferring global expertise,
enhancing domestic capacity, and unlocking Indonesia’s vast geothermal potential in support of
the country’s energy transition agenda.

Indonesia holds around 40 percent of the world’s geothermal reserves, equivalent to 24 gigawatts,
but only about 10 percent has been developed. Through this partnership, PT DSSR Daya Mas
Sakti and PT FirstGen Geothermal Indonesia aim to accelerate the development of geothermal
resources that will contribute to national energy security and provide a sustainable source of clean
power.

The joint venture will focus on the development and management of geothermal resources with
a combined potential of approximately 440 megawatts, across six strategic fields located in West
Java, Flores, Jambi, West Sumatra, and Central Sulawesi.

“This agreement goes beyond investment. It is a strategic collaboration to bring world-class
knowledge and best practices from EDC to Indonesia. Our goal is to strengthen national capacity
in geothermal development and to fully harness the country’s natural potential for clean energy.
Together, we aim to create real value for communities, the economy, and the environment,” said
Lokita Prasetya, President Director of PT DSSR Daya Mas Sakti and Vice President Director of
PT Dian Swastatika Sentosa Tbk.

Reinforcing this goal, EDC through PT FirstGen Geothermal Indonesia emphasized that the
partnership reflects a shared mission to advance Indonesia’s energy transition. Recognized as
the largest vertically integrated geothermal company globally, the collaboration provides EDC an
opportunity to apply its global expertise in geothermal development to strengthen Indonesia’s
renewable energy capacity and contribute to a cleaner, more sustainable energy future.

 “EDC has decades of experience in harnessing geothermal energy in the Philippines, and we are
proud to share this expertise with Indonesia through our partnership with DSSR. By combining
EDC’s global capabilities with DSSR’s strong local presence, this joint venture will not only
develop projects, but also build capacity and transfer knowledge that will leave a lasting impact
on Indonesia’s renewable energy sector,” said Francis Giles B. Puno, Vice-Chairman and CEO
of EDC, and President & COO of First Gen.