APTN Inc.

APTN provides hydrothermal and geothermal heating and cooling systems in South Korea. It provides solar energy and fuel cell systems, as well as hydrothermal heating and cooling systems, as well as the lithium extraction business.

The company serves domestic customers and public institutions. Founded in 2002 and headquartered in Seongnam-si, South Korea, APTN was formerly known as APT Neuroscience, Inc. before rebranding in August 2025.