| 2 | Hartley / Dalziel / Sharp | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 3 | Garcia / Magnussen / Rockenfeller | Corvette Racing (USA) | Gary Pratt | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 4 | Milner / Gavin / Fässler | Corvette Racing (USA) | Gary Pratt | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 5 | Fittipaldi / Albuquerque / Barbosa | Mustang Sampling Racing | | Cadillac | DPi-V.R | | Cadillac | P |
| 6 | Castroneves / Montoya / Pagenaud | Team Penske | | Oreca | 07 | | Gibson | P |
| 10 | Taylor / Hunter-Reay / *Taylor | Konica Minolta Cadillac DPi-V.R (USA) | Wayne Taylor | Cadillac | DPi-V.R | | Cadillac | P |
| 13 | Beche / Menezes / Heidfeld | Rebellion Racing (CH) | Bart Hayden | Oreca | 07 | | Gibson | P |
| 14 | Karam / Alon / James | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 15 | Hawksworth / Cindric / Pruett | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 16 | Mul / Lewis / Sandberg | Change Racing | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 20 | Yount / Burkett / Rice | BAR1 Motorsports | | Oreca | FLM 09 | | Chevrolet | PC |
| 22 | Derani / Senna / Van Overbeek | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 23 | Bell / Montecalvo / Sweedler | Alex Job Racing | | Audi | R8 LMS | GT3 | Audi | GTD |
| 24 | Tomczyk / Edwards / Catsburg | BMW Team RLL (USA) | | BMW | M6 | F13 GTLM | BMW | GTLM |
| 25 | Auberlen / Sims / Wittmer | BMW Team RLL (USA) | | BMW | M6 | F13 GTLM | BMW | GTLM |
| 26 | Grist / Falb / Drissi | BAR1 Motorsports | | Oreca | FLM 09 | | Chevrolet | PC |
| 28 | Christensen / Morad / de Quesada | Alegra Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 29 | De Phillippi / Mies / van der Linde | Montaplast by Land-Motorsport (D) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Curran / Cameron / Conway | Whelen Engineering Racing | | Cadillac | DPi-V.R | | Cadillac | P |
| 33 | Keating / Bleekemolen / Farnbacher | Riley Motorsports - Team AMG | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 38 | French / O'Ward / Masson | Performance Tech Motorsports | | Oreca | FLM 09 | | Chevrolet | PC |
| 48 | Snow / Sellers / Hindman | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 50 | MacNeil / *Long / *Jeannette | Riley Motorsports - WeatherTech Racing | | Porsche | 991 GT3 R | | Porsche | GTD |
| 52 | Pla / Gutierrez / *Canal | PR1/Mathiasen Motorsports | | Ligier | JS P217 | | Gibson | P |
| 54 | Bennett / Braun / Jönsson | CORE autosport | | Porsche | 991 GT3 R | | Porsche | GTD |
| 57 | Davis / Aschenbach / Bell | Stevenson Motorsports | | Audi | R8 LMS | GT3 | Audi | GTD |
| 62 | Vilander / Pier Guidi / Fisichella | Risi Competizione (USA) | | Ferrari | 488 | GTE | Ferrari | GTLM |
| 63 | Cressoni / Balzan / Nielsen | Scuderia Corsa | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 66 | Hand / Bourdais / Müller | 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 |
| 73 | Lindsey / Bergmeister / McMurry | Park Place Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 75 | von Moltke / Habul / Vautier | SunEnergy1 Racing | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 85 | Goikhberg / Simpson / Miller | JDC-Miller Motorsports | | Oreca | 07 | | Gibson | P |
| 86 | Negri / Segal / Dyer | Michael Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 90 | van der Zande / Bomarito / Goossens | Visit Florida Racing | | Ligier | JS P217 | | Gibson | P |
| 93 | Lally / Legge / Wilkins | Michael Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 96 | Marks / Krohn / Klingmann | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 911 | Pilet / Tandy / Werner | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |
| 912 | Bruni / Bamber / Vanthoor | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |