California-based Anduril said the production plant, dubbed Arsenal-2, will manufacture torpedo tubes and other submarine components. The company will receive a $2.9bn Navy contract for the work.
US President Donald Trump was set to unveil the project and announce a major naval shipyard expansion in Baltimore, Maryland, on Tuesday afternoon.
The contract marks a significant shift for Anduril, founded in 2017 by Palmer Luckey and best known for military drones, autonomous systems and software. Valued at nearly $117bn, the company has expanded into uncrewed underwater vehicles, ocean vessels and command-and-control software designed to connect military sensors, weapons and other systems.
News of the shipyard comes alongside Project Meridian, a newly disclosed Pentagon initiative in which Luckey and technology billionaire Elon Musk will lead a 120-day study on the future of warfare, including autonomous, AI-powered and maritime capabilities. The initiative was announced at Defense Secretary Pete Hegseth's State of the Force address last week in Virginia.
The Maryland investment is the latest in a series of steps by the Pentagon to accelerate naval shipbuilding and weapons production, spurred by the war on Iran and other regional conflicts that continue to threaten global oil traffic while highlighting the critical role of maritime power.