That's a pretty amazing slide even with that error(? see below). 15 of the top 25 tech companies had 1st or 2nd gen immigrant (co-)founders.

As to booking.com: from reading the Wikipedia entry I gather the original dutch-founded booking.com was at some point acquired by Priceline Group (which had an American founder), which later changed its name back to booking.com. It seems the slide is (technically) correct, and any attempt to capture such cases in a workable definition would be complicated.

I think it's using owning entity's headquarter location (as opposed to founder ethnicity or pre-acquisition roots). Priceline is headquartered in CT.

But does/did he qualify as an immigrant founder?