Iron Dome is a native Israeli system, as is Arrow (equivalent to THAAD) and Davids Sling, which is replacing Patriot PAC-2.
All of these however were developed with R&D participation and component sourcing from US companies like Boeing and Raytheon. This is a win-win for both countries as they share R&D benefits.
Thanks. The Israelis have made significant mods to the F16, too, especially adding conformal fuel tanks.