| 3 | Magnussen / Garcia / Rockenfeller | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 4 | Gavin / Fässler / Milner | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 5 | Albuquerque / Barbosa / Conway / Fittipaldi | Mustang Sampling Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 6 | Montoya / Cameron / Pagenaud | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | DPi |
| 7 | Taylor / Rossi / Castroneves | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | DPi |
| 8 | Pérez Companc / Chase / Haase / Dalziel | Starworks Motorsport | | Audi | R8 LMS | GT3 | Audi | GTD |
| 9 | Kern / Robichon / Olsen / Hargrove | Pfaff Motorsports (CDN) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 10 | van der Zande / Taylor / Alonso / Kobayashi | Konica Minolta Cadillac DPi-V.R. (USA) | Wayne Taylor | Cadillac | DPi-V.R | | Cadillac | DPi |
| 11 | Bortolotti / Ineichen / Engelhart / Ling | GRT Grasser Racing Team (A) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 12 | Montecalvo / Bell / Telitz / Segal | AIM Vasser Sullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 13 | Franzoni / Gomes / Longo | Via Italia Racing (BR) | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 14 | Heistand / Hawksworth / Cassidy / Cindric | AIM Vasser Sullivan | | Lexus | RC F | GT3 | Lexus | GTD |
| 18 | Maldonado / Gonzalez / Cullen / Saavedra | DragonSpeed (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 19 | Davis / Riberas / Hardeman / *Winkelhock | Moorespeed | | Audi | R8 LMS | GT3 | Audi | GTD |
| 24 | Edwards / Krohn / Mostert / Zanardi | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 25 | De Phillippi / Eng / Herta / Blomqvist | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 29 | Morad / Vanthoor / Feller | Montaplast by Land Motorsport (D) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Nasr / Curran / Derani | Whelen Engineering Racing | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 33 | Keating / Bleekemolen / Fraga / Stolz | Riley Motorsports - Team AMG | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 38 | Masson / Wright / Masson / Cassels | Performance Tech Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 44 | Mapelli / Lally / Pumpelly / Potter | Magnus Racing (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 46 | Keen / Busnelli / Babini | Ebimotors srl (I) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 47 | Pavlovic / Lundqvist / Yount / Gdovic / Dunn | Precision Performance Motorsports (PPM) (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 48 | Caldarelli / Lewis / Sellers / Hardwick | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 50 | Canapino / Kaiser / Owen / Binder | Juncos Racing | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 51 | Serra / Lamy / Lauda / Dalla Lana | Spirit of Race | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 52 | Aubry / McMurry / Kvamme | PR1 Mathiasen Motorsports | Bobby Oergel | Oreca | 07 | | Gibson | LMP2 |
| 54 | Dumas / Duval / Braun / Bennett | CORE autosport | | Nissan | Onroak DPi | | Nissan | DPi |
| 55 | Tincknell / Bomarito / Pla | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | DPi |
| 57 | Beatriz / Legge / Nielsen / de Silvestro / *Heinricher | Meyer Shank Racing w/ Curb-Agajanian | | Acura | NSX | GT3 | Acura | GTD |
| 62 | Rigon / Molina | Risi Competizione (USA) | Guiseppe Risi | Ferrari | 488 | GTE | Ferrari | GTLM |
| 63 | Westphal / MacNeil / Vilander / Farnbacher | 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 |
| 71 | Buhk / Schiller / Baumann / Perez | P1 Motorsports | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 73 | Long / Lindsey / Campbell / Boulle | Park Place Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 77 | Jarvis / Rast / Bernhard / Nunez | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | DPi |
| 81 | Hanley / Lapierre / Allen / Hedman | DragonSpeed (USA) | Elton Julian | Oreca | 07 | | Gibson | LMP2 |
| 84 | Trummer / Simpson / Miller / Piedrahita | JDC-Miller MotorSports | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 85 | DeFrancesco / Barrichello / Vautier / Goikhberg | JDC-Miller MotorSports | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 86 | Hindman / Allmendinger / Farnbacher / Marks | Meyer Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 88 | van der Linde / de Angelis / Vervisch / James | WRT Speedstar Audi Sport (B) | Vincent Vosse | Audi | R8 LMS | GT3 | Audi | GTD |
| 96 | Klingmann / Machavern / Foley / Auberlen | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 99 | Müller / Bachler / Renauer / Görig / Häring | NGT Motorsport | | Porsche | 991 GT3 R | | Porsche | GTD |
| 540 | Seefried / Cairoli / Pappas / *Werner | Black Swan Racing | | Porsche | 991 GT3 R | | Porsche | GTD |
| 911 | Tandy / Pilet / Makowiecki | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |
| 912 | Bamber / Jaminet | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |