| 01 | van der Zande / Magnussen / Dixon | Cadillac Chip Ganassi Racing | Cadillac | DPi-V.R | | Cadillac | DPi |
| 1 | Sellers / Snow / Lewis | Paul Miller Racing | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 3 | Taylor / Catsburg / Garcia | Corvette Racing | Chevrolet | Corvette C8.R | | Chevrolet | GTLM |
| 4 | Tandy / Sims / Milner | Corvette Racing | Chevrolet | Corvette C8.R | | Chevrolet | GTLM |
| 5 | Vautier / Duval / Bourdais | Mustang Sampling/JDC-Miller MotorSports | Cadillac | DPi-V.R | | Cadillac | DPi |
| 7 | McAleer / Askew / McCusker | Forty7 Motorsports | Duqueine | M30-D08 | | Nissan | LMP3 |
| 8 | Farano / Aubry / Buret | Tower Motorsport | Oreca | 07 | | Gibson | LMP2 |
| 9 | Robichon / Vanthoor / Kern | Pfaff Motorsports | Porsche | 991 GT3 R | | Porsche | GTD |
| 10 | Taylor / Albuquerque / Rossi | Konica Minolta Acura (USA) | Acura | ARX-05 | | Acura | DPi |
| 11 | Thomas / Nunez / Merrill | WIN Autosport | Oreca | 07 | | Gibson | LMP2 |
| 12 | Veach / Megennis / Montecalvo | Vasser-Sullivan Racing | Lexus | RC F | GT3 | Lexus | GTD |
| 14 | Telitz / Hawksworth / Kirkwood | Vasser-Sullivan Racing | Lexus | RC F | GT3 | Lexus | GTD |
| 16 | Long / Heylen / Hindman | Wright Motorsports | Porsche | 991 GT3 R | | Porsche | GTD |
| 18 | Merriman / Tilley / Dalziel | Era Motorsport | Oreca | 07 | | Gibson | LMP2 |
| 19 | Simpson / Perera / Zimmermann | GRT Grasser Racing Team (A) | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 22 | McGuire / Boyd / Smith | United Autosports | Oreca | 07 | | Gibson | LMP2 |
| 23 | James / de Angelis / Gunn | Heart of Racing Team | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 24 | Farfus / Edwards / Krohn | BMW Team RLL (USA) | BMW | M8 | GTE | BMW | GTLM |
| 25 | Eng / De Phillippi / Spengler | BMW Team RLL (USA) | BMW | M8 | GTE | BMW | GTLM |
| 28 | Morad / de Quesada / Johnson | Alegra Motorsports | Mercedes-AMG | GT3 | | Mercedes-Benz | GTD |
| 31 | Nasr / Derani / Conway | Whelen Engineering Racing | Cadillac | DPi-V.R | | Cadillac | DPi |
| 33 | Willsey / Barbosa / Clairay | Sean Creech Motorsport | Ligier | JS P320 | | Nissan | LMP3 |
| 38 | Lindh / Goldburg / Llarena | Performance Tech Motorsports | Ligier | JS P320 | | Nissan | LMP3 |
| 44 | Potter / Lally / Pumpelly | Magnus Racing with Archangel Motorsports | Acura | NSX | GT3 | Acura | GTD |
| 48 | Johnson / Kobayashi / Pagenaud | Ally Cadillac Racing | Cadillac | DPi-V.R | | Cadillac | DPi |
| 52 | Keating / Jensen / Huffaker | PR1 Mathiasen Motorsports | Oreca | 07 | | Gibson | LMP2 |
| 54 | Bennett / Kurtz / Braun | Core Motorsport | Ligier | JS P320 | | Nissan | LMP3 |
| 55 | Jarvis / Tincknell / Bomarito | Mazda Motorsports | Mazda | RT24-P | | Mazda | DPi |
| 60 | Cameron / Pla / Montoya | Meyer Shank Racing w/ Curb-Agajanian (USA) | Acura | ARX-05 | | Acura | DPi |
| 74 | Robinson / Pigot / Andrews | Riley Motorsports | Ligier | JS P320 | | Nissan | LMP3 |
| 75 | Habul / Engel / Grenier | SunEnergy1 Racing | Mercedes-AMG | GT3 | | Mercedes-Benz | GTD |
| 79 | MacNeil / Jaminet / Campbell | WeatherTech Racing | Porsche | 991 RSR | 19 | Porsche | GTLM |
| 83 | Krütten / Bell / Sales | WIN Autosport | Duqueine | M30-D08 | | Nissan | LMP3 |
| 88 | Nielsen / Legge / Figueiredo | Team Hardpoint EBM | Porsche | 991 GT3 R | | Porsche | GTD |
| 91 | Cox / Murry / Bleekemolen | Riley Motorsports | Ligier | JS P320 | | Nissan | LMP3 |
| 96 | Auberlen / Foley / Read | Turner Motorsport | BMW | M6 | F13 GT3 | BMW | GTD |
| 99 | Ferriol / Bamber / Estep | Team Hardpoint EBM | Porsche | 991 GT3 R | | Porsche | GTD |