Out of America (and the world's) only $1T companies: Brin and Huang are 1st gen immigrants. Nadella is a 1st gen immigrant; he brought Microsoft out of it's malaise.
(Jobs' bio father was an immigrant, as was Bezos' adoptive father)
3/5 ain't bad. (2/5 if you're a stickler)
Tesla, which at one point was a $T company and is currently pretty close, is also famously founded by an immigrant.
There are very few people in tech in America who will not have worked for an immigrant founder/CEO at some point in their career.