| 2 | Dalziel / Derani / Sharp / Brown | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 3 | Magnussen / Rockenfeller / Garcia | Corvette Racing (USA) | Gary Pratt | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 4 | Gavin / Fässler / Milner | Corvette Racing (USA) | | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 5 | Albuquerque / Fittipaldi / Barbosa | Mustang Sampling Racing | | Cadillac | DPi-V.R | | Cadillac | P |
| 8 | Quinton / Mayer / *Rayhall | Starworks Motorsports | | Oreca | FLM 09 | | Chevrolet | PC |
| 10 | Taylor / Taylor / Lynn | Konica Minolta Cadillac DPi-V.R (USA) | Wayne Taylor | Cadillac | DPi-V.R | | Cadillac | P |
| 11 | Bortolotti / Engelhart / Ineichen / Antinucci | GRT Grasser Racing Team (A) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 14 | Karam / Pruett / James / Alon | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 18 | Gdovic / Claman / Anassis / Massari | DAC Motorsports | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 22 | Van Overbeek / Brown / *Hartley | 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 | Sims / Wittmer / Auberlen | BMW Team RLL (USA) | | BMW | M6 | F13 GTLM | BMW | GTLM |
| 26 | Yacaman / Thompson / Ducote / Drumwright | BAR 1 Motorsports | | Oreca | FLM 09 | | Chevrolet | PC |
| 27 | Ruberti / Sbirrazzuoli / DeGeorge | Dream Racing Motorsport | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 28 | Pumpelly / Morad / de Quesada | Alegra Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 29 | Mies / De Phillippi / Gounon | Montaplast by Land-Motorsport (D) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Curran / Cameron / *Conway | Whelen Engineering Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | P |
| 46 | Babini / Busnelli | Ebimotors (I) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 48 | Sellers / Snow / von Moltke | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 50 | Jeannette / MacNeil | Riley Motorsports - WeatherTech Racing (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 52 | Pla / Gutierrez / Guasch / *Kimber-Smith | PR1/Mathiasen Motorsports | | Ligier | JS P217 | | Gibson | P |
| 54 | Braun / Jönsson / Bennett | Core Autosport | | Porsche | 991 GT3 R | | Porsche | GTD |
| 55 | Bomarito / Nunez / Pigot | Mazda Motorsports | | Mazda | RT24-P | | Mazda | P |
| 57 | Davis / Aschenbach / Bell | Stevenson Motorsports | | Audi | R8 LMS | GT3 | Audi | GTD |
| 62 | Vilander / Calado / Montoya | Risi Competizione (USA) | | Ferrari | 488 | GTE | Ferrari | GTLM |
| 66 | Hand / Bourdais / Müller | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 67 | Briscoe / Westbrook / Dixon | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 70 | Miller / Long / Franchitti | Mazda Motorsports | | Mazda | RT24-P | | Mazda | P |
| 73 | McMurry / Bergmeister / *Lindsey | Park Place Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 75 | Said / Habul / Vautier | SunEnergy1 Racing | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 85 | Simpson / Miller / Goikhberg | JDC-Miller Motorsports | | Oreca | 07 | | Gibson | P |
| 86 | Segal / Negri / Dyer | Michael Shank Racing w/Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 90 | van der Zande / Goossens / Rast | VisitFlorida Racing | | Riley | Mk.30 | | Gibson | P |
| 93 | Wilkins / Legge / Lally | Michael Shank Racing w/Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 912 | Werner / Pilet / Vanthoor | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |