| 2 | Nato / Dalziel / Sharp | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 3 | Garcia / Magnussen / Fässler | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 4 | Milner / Gavin / Fässler | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 5 | Albuquerque / Fittipaldi / Vautier | Mustang Sampling Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | P |
| 6 | Montoya / Cameron / Pagenaud | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | P |
| 7 | Taylor / Castroneves / Rahal | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | P |
| 10 | van der Zande / Taylor / Hunter-Reay | Konica Minolta Cadillac DPi-V.R (USA) | Wayne Taylor | Cadillac | DPi-V.R | | Cadillac | P |
| 14 | Frommenwiler / Baumann / Marcelli | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 15 | Hawksworth / Heinemeier Hansson / Rayhall | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 22 | Derani / Bernhard / Van Overbeek | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 24 | Edwards / Mostert / Krohn | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 25 | De Phillippi / Sims / Auberlen | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 29 | van der Linde / Mies / Morad | Montaplast by Land-Motorsport (D) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Nasr / Curran / Chaves | Whelen Engineering Racing | | Cadillac | DPi-V.R | | Cadillac | P |
| 33 | Keating / Bleekemolen / Stolz | Mercedes-AMG Team Riley Motorsports | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 38 | French / Masson / Boulle | Performance Tech Motorsports | | Oreca | 07 | | Gibson | P |
| 44 | Potter / Lally / Davis | Magnus Racing (USA) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 48 | Sellers / Snow / Lewis | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 52 | Gutierrez / Saavedra / Owen | AFS/PR1 Mathiasen Motorsports | Bobby Oergel | Oreca | 07 | | Gibson | P |
| 54 | Bennett / Dumas / Braun | CORE autosport | Jon Bennett | Oreca | 07 | | Gibson | P |
| 55 | Bomarito / Pigot / Franchitti | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | P |
| 58 | Nielsen / Long / Renauer | Wright Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 62 | Vilander / Molina / Bertolini | Risi Competizione (USA) | Guiseppe Risi | Ferrari | 488 | GTE | Ferrari | GTLM |
| 63 | Serra / Jeannette / MacNeil | Scuderia Corsa | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 64 | Cressoni / Bell / Montecalvo | Scuderia Corsa | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 66 | Hand / Müller / Bourdais | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 67 | Westbrook / Briscoe / Dixon | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 71 | Perez / Fraga / Buhk | P1 Motorsports | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 73 | Pappas / Pumpelly / *Henzler | Park Place Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 77 | Jarvis / di Grassi / Nunez | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | P |
| 85 | Trummer / DeFrancesco / Alon | JDC-Miller Motorsports | | Oreca | 07 | | Gibson | P |
| 86 | Parente / Hindman / Legge | Meyer Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 93 | Marks / Farnbacher / Aschenbach | Meyer Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 96 | Yount / Machavern / *Palttala | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 99 | Simpson / Goikhberg / Miller | JDC-Miller Motorsports | | Oreca | 07 | | Gibson | P |
| 911 | Pilet / Makowiecki / Tandy | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |
| 912 | Bamber / Vanthoor / Jaminet | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |