It is not specific to UK citizens, it requires an investment of at least $500,000 and provide employment to at least 10 US citizens/residents and is called E5 employment visa. Here is an extract from US state dept:
Employment Fifth Preference (E5)
Employment Creation Investors receive 7.1 percent of the yearly worldwide limit. All applicants must file a Form I-526, Immigrant Petition by Alien Entrepreneur, with the BCIS. To qualify, an alien must invest between U.S. $500,000 and $1,000,000, depending on the employment rate in the geographical area, in a commercial enterprise in the United States which creates at least 10 new full-time jobs for U.S. citizens, permanent resident aliens, or other lawful immigrants, not including the investor and his or her family.
