Hmm, for NP and I think also for HEP, it's essentially only two: NSF and DOE. That's not so different from Germany, where it's BMBF and DFG. That's at least for

Hmm, for NP and I think also for HEP, it's essentially only two: NSF and DOE. That's not so different from Germany, where it's BMBF and DFG. That's at least for the main stream grants. There is little money from private foundations (Moore foundation for example).