Chevrolet, 11 cars
2 Penske Racing (Will Power, Helio Castroneves)
1 Panther Racing (JR Hildebrand)
1 Panther DRR (Oriol Servia)
2 KV Racing (Tony Kanaan, Simona De Silvestro)
3 Andretti Autosport (Marco Andretti, James Hinchcliffe, Ryan Hunter-Reay)
1 Ed Carpenter Racing (Ed Carpenter)
1 Dragon Racing (Sebastien Bourdais)

Honda, 11 cars
3 Ganassi Racing (Scott Dixon, Dario Franchitti, Charlie Kimball)
1 Foyt (Takuma Sato)
2 Schmidt (Simon Pagenaud, Tristan Vautier)
1 Herta (Alex Tagliani)
1 Rahal Letterman Lanigan (Graham Rahal, plus Mike Conway at Long Beach)
1 Fisher Hartman (Josef Newgarden)
2 *Dale Coyne Racing (Justin Wilson and TBA)
*Coyne always comes through with two cars so we are listing him as confirmed

Outside chance for a fourth from Ganassi Racing, and one from HVM.