Multi-American | How immigrants are redefining 'American' in Southern California

Read the report: Immigrant entrepreneurs behind many of the nation's top venture-funded companies

Much has been written lately about immigrants and entrepreneurship, including a U.S. visa system that allows the wealthiest of investors to obtain green cards through one program, but which makes it far more difficult for less privileged aspiring foreign-born entrepreneurs to stay.

Previous research has found immigrants to be more likely than native-born Americans to start a business. Now a report from a trade and immigration policy think tank is counting immigrants as being behind nearly half the nation's top venture-funded companies. According to the new report from the National Foundation for American Policy, 23 out of 50 of the United States' top venture-funded companies had at least one immigrant founder; immigrants also played a part on the management or development teams of 75 percent of these. The full report is below: