| 2 | Pla / *Dalziel / *Sharp | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 3 | Garcia / Rockenfeller / Magnussen | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 4 | Milner / Fässler / Gavin | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 5 | Albuquerque / Barbosa / Fittipaldi | Mustang Sampling Racing | | 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 | Marcelli / Baumann / Frommenwiler | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 15 | Hawksworth / Rayhall / Heinemeier Hansson | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 22 | Derani / Lapierre / Van Overbeek | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 24 | Krohn / Edwards / Catsburg | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 25 | De Phillippi / Sims / Auberlen | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 29 | Mies / van der Linde / Picariello | Montaplast by Land-Motorsport (D) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Nasr / Conway / Curran | Whelen Engineering Racing | | Cadillac | DPi-V.R | | Cadillac | P |
| 32 | di Resta / Brundle / Hanson | United Autosports (USA) | Richard Dean/Zak Brown | Ligier | JS P217 | | Gibson | P |
| 33 | Keating / Bleekemolen / Stolz | Mercedes-AMG Team Riley Motorsports | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 36 | Miller / Wittmer / Bechtolsheimer | CJ Wilson Racing | | Acura | NSX | GT3 | Acura | GTD |
| 38 | O'Ward / Masson / French | Performance Tech Motorsports | | Oreca | 07 | | Gibson | P |
| 44 | Potter / Lally / Davis | Magnus Racing (USA) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 48 | Snow / Sellers / Lewis | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 51 | Serra / Lamy / Lauda / Dalla Lana | Spirit of Race (CH) | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 52 | Saavedra / Yacaman / Gonzalez | AFS/PR1 Mathiasen Motorsports | | Ligier | JS P217 | | Gibson | P |
| 54 | Braun / Dumas / Bennett | CORE autosport | Jon Bennett | Oreca | 07 | | Gibson | P |
| 55 | Bomarito / Tincknell / Pigot | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | P |
| 58 | Nielsen / Jaminet / Long / Renauer | Wright Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 62 | Calado / Pier Guidi / Vilander | Risi Competizione (USA) | Guiseppe Risi | Ferrari | 488 | GTE | Ferrari | GTLM |
| 63 | Jeannette / Balzan / MacNeil | Scuderia Corsa | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 64 | Montecalvo / *Sweedler / *Bell | 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 / Dixon / Briscoe | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 69 | Dyer / Eversley / Gilsinger | HART | | Acura | NSX | GT3 | Acura | GTD |
| 71 | Koch / Spinelli / Perez | P1 Motorsports | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 73 | Pappas / Bergmeister / Lindsey | Park Place Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 75 | Grenier / Jäger / Habul | SunEnergy1 Racing | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 77 | Rast / Jarvis / Nunez | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | P |
| 85 | Trummer / Panciatici / Alon | JDC-Miller Motorsports | | Oreca | 07 | | Gibson | P |
| 86 | Legge / Parente / Hindman | Michael Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 90 | McMurry / Cheever / Vautier | Spirit of Daytona Racing | | Cadillac | DPi-V.R | | Cadillac | P |
| 93 | Marks / Aschenbach / Farnbacher | Michael Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 96 | Yount / Palttala / Machavern | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 99 | Simpson / Miller / Goikhberg | JDC-Miller Motorsports | | Oreca | 07 | | Gibson | P |
| 911 | Tandy / Makowiecki / Pilet | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |
| 912 | Vanthoor / Bruni / Bamber | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |