Subco, a Privately Owned company headquartered in Australia, was founded in 2016 and operates with approximately 10 employees. The company specializes in data centre infrastructure, functioning as a provider of undersea network systems connecting Australia to the Middle East and beyond.
On September 4, 2026, Firmus announced a trans-Pacific connectivity agreement with SUBCO, making Firmus a cornerstone customer on SUBCO’s APX East submarine cable system. Firmus plans to invest approximately US$300 million (A$418 million) to secure up to 150 terabits per second (Tbps) of dedicated capacity for 25 years. This deal provides Firmus with a long-term fiber connection between its Australian data center campuses and US markets, with the APX East cable scheduled for service in the fourth quarter of 2028. Firmus views this infrastructure as crucial for exporting AI compute, aiming to position Australia as a global processing hub. Previously, on August 21, 2026, Subco urged the Australian Federal Police to investigate damage to two submarine cables, following reports of cable cuts in the Baltic Sea.
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