Arlington, Virginia-based OneWeb plans to build a network of satellites to provide global broadband access.
The two companies announced late Monday that OneWeb had obtained pledges of $1.2 billion from SoftBank and other investors.
The $1 billion commitment follows a promise by SoftBank founder Masayoshi Son to US President-elect Donald Trump to create 50,000 jobs and invest $50 billion in US start-ups.
The funds will finance the construction of a satellite factory in Exploration Park, Florida, to produce 15 satellites per week at a low cost. The companies said the business could create nearly 3,000 new engineering, manufacturing and other jobs.
Tokyo-based SoftBank is one of Japan's biggest telecoms providers, with more than 63,590 employees, a solar power business, humanoid robots for home use, ride-booking services and financial technology. It recently set up a $25 billion private fund for technology investments, along with Saudi Arabia and other investors, that Son says could grow to $100 billion.
It was unclear if they funds promised to OneWeb were part of that pledge.
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