| 3 | Garcia / Magnussen | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 4 | Milner / *Gavin | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C7 | .R | Chevrolet | GTLM |
| 5 | Albuquerque / Conway / Barbosa | Mustang Sampling Racing | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 6 | Montoya / Cameron | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | DPi |
| 7 | Taylor / Castroneves | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | DPi |
| 8 | Chase / Dalziel / Skeen | Starworks Motorsport | | Audi | R8 LMS | GT3 | Audi | GTD |
| 9 | Robichon / Hargrove / Kern | Pfaff Motorsports (CDN) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 10 | van der Zande / Taylor | Konica Minolta Cadillac DPi-V.R. (USA) | Wayne Taylor | Cadillac | DPi-V.R | | Cadillac | DPi |
| 12 | Montecalvo / Telitz / Bell | AIM Vasser Sullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 14 | Heistand / Hawksworth / Frommenwiler | AIM Vasser Sullivan | | Lexus | RC F | GT3 | Lexus | GTD |
| 19 | Hardeman / Riberas / Davis | Moorespeed | | Audi | R8 LMS | GT3 | Audi | GTD |
| 24 | Edwards / Krohn | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 25 | De Phillippi / Blomqvist | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 29 | Feller / Mies / Morad | Montaplast by Land Motorsport (D) | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Nasr / Derani / Curran | Whelen Engineering Racing | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 33 | Keating / *Fraga / *Bleekemolen | Riley Motorsports - Team AMG | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 38 | Masson / Cassels / Evans | Performance Tech Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 44 | Potter / Lally / Pumpelly | Magnus Racing (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 47 | Gdovic / Eidson / Yount | Precision Performance Motorsports (PPM) (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 48 | Hardwick / Lewis / *Sellers | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 50 | Binder / Owen | Juncos Racing | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 52 | Aubry / McMurry / Lux | PR1 Mathiasen Motorsports | Bobby Oergel | Oreca | 07 | | Gibson | LMP2 |
| 54 | Bennett / Braun / Dumas | CORE autosport | | Nissan | Onroak DPi | | Nissan | DPi |
| 55 | Tincknell / Pla / Bomarito | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | DPi |
| 57 | Nielsen / Legge / Figueiredo | Heinricher Racing w/Meyer Shank Racing | | Acura | NSX | GT3 | Acura | GTD |
| 63 | Westphal / Vilander / MacNeil | Scuderia Corsa | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 66 | Hand / Müller | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 67 | Westbrook / Briscoe | Ford Chip Ganassi Racing (USA) | Chip Ganassi | Ford | GT | LM GTE | Ford | GTLM |
| 73 | Boulle / Lindsey / *Long | Park Place Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 77 | Jarvis / Bernhard / Nunez | Mazda Team Joest (D) | Reinhold Jöst | Mazda | RT24-P | | Mazda | DPi |
| 84 | Trummer / Miller / Simpson | JDC-Miller MotorSports | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 85 | Goikhberg / Piedrahita / Vautier | JDC-Miller MotorSports | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 86 | Hindman / Farnbacher / Marks | Meyer Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 96 | Machavern / Auberlen / Foley | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 540 | Seefried / Werner / Miller | Black Swan Racing | | Porsche | 991 GT3 R | | Porsche | GTD |
| 911 | Tandy / Pilet | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |
| 912 | Vanthoor / Bamber | Porsche GT Team (USA) | Jon Bennett | Porsche | 991 RSR | II | Porsche | GTLM |