| 2 | Derani / 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 / *Fässler / *Gavin | Corvette Racing (USA) | | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 5 | Fittipaldi / Barbosa / Albuquerque | Mustang Sampling Racing | | Cadillac | DPi-V.R | | Cadillac | P |
| 8 | Grist / Rayhall / Hanratty | 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 / Antinucci / Engelhart / Ineichen | GRT Grasser Racing Team (A) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 13 | Jani / Buemi / Heidfeld | Rebellion Racing (CH) | Bart Hayden | Oreca | 07 | | Gibson | P |
| 14 | Pruett / Karam / James | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 15 | Alon / Hawksworth / Cindric | 3GT Racing | | Lexus | RC F | GT3 | Lexus | GTD |
| 16 | Lewis / Mul / Sandberg | Change Racing | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 18 | Gdovic / Anassis / Massari | DAC Motorsports | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 20 | Rice / Burkett / Yount / Kvamme | BAR1 Motorsports | | Oreca | FLM 09 | | Chevrolet | PC |
| 22 | Hartley / Senna / Van Overbeek / Brown | Tequila Patron ESM | Scott Sharp | Nissan | Onroak DPi | | Nissan | P |
| 23 | Bell / Montecalvo / Sweedler | Alex Job Racing | | Audi | R8 LMS | GT3 | Audi | GTD |
| 24 | Catsburg / Tomczyk / Edwards | BMW Team RLL (USA) | | BMW | M6 | F13 GTLM | BMW | GTLM |
| 25 | Sims / Auberlen / Wittmer | BMW Team RLL (USA) | | BMW | M6 | F13 GTLM | BMW | GTLM |
| 26 | Yacaman / Thompson / Ducote / Drumwright | BAR 1 Motorsports | | Oreca | FLM 09 | | Chevrolet | PC |
| 27 | Sbirrazzuoli / Ruberti / Persiani / *DeGeorge | Dream Racing Motorsport | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 28 | Morad / Pumpelly / Christensen / de Quesada | Alegra Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 29 | De Phillippi / Mies / Gounon | Montaplast by Land-Motorsport (D) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Cameron / Conway / Curran | Whelen Engineering Racing (USA) | | 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 |
| 46 | Collard / Babini / Beretta / Busnelli | Ebimotors (I) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 48 | Snow / Sellers / von Moltke | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 50 | MacNeil / Van Gisbergen / Jeannette | Riley Motorsports - WeatherTech Racing (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 52 | Gutierrez / Kimber-Smith / Guasch | PR1/Mathiasen Motorsports | | Ligier | JS P217 | | Gibson | P |
| 54 | Bennett / Braun / Jönsson | Core Autosport | | Porsche | 991 GT3 R | | Porsche | GTD |
| 55 | Bomarito / Pigot / Nunez | Mazda Motorsports | | Mazda | RT24-P | | Mazda | P |
| 57 | Davis / Aschenbach / Bell | Stevenson Motorsports | | Audi | R8 LMS | GT3 | Audi | GTD |
| 62 | Fisichella / Calado / Vilander | Risi Competizione (USA) | | Ferrari | 488 | GTE | Ferrari | GTLM |
| 63 | Nielsen / Cressoni / Balzan | 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 | Briscoe / Westbrook / Dixon | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 68 | Mücke / Pla / Johnson | Ford Chip Ganassi Team UK (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 70 | Miller / Franchitti / Long | Mazda Motorsports | | Mazda | RT24-P | | Mazda | P |
| 73 | McMurry / Lindsey / Bergmeister / Heylen | Park Place Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 75 | Said / Habul / Vautier | SunEnergy1 Racing | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 85 | Simpson / Goikhberg / 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 / Rast / Goossens | 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 |
| 96 | Marks / Krohn / Klingmann | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 911 | Werner / Pilet / Makowiecki | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |
| 912 | Estre / Lietz / Vanthoor | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |