| 01 | Bourdais / van der Zande / Dixon | Cadillac Racing (USA) | Chip Ganassi | Cadillac | V-Series.R | | Cadillac | GTP |
| 023 | Rovera / Scardina / Triarsi | Triarsi Competizione (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 04 | Kurtz / Siegel / Hanley | Crowdstrike Racing by APR (P) | | Oreca | 07 | | Gibson | LMP2 |
| 1 | Snow / Sellers / Lewis | Paul Miller Racing (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |
| 3 | Garcia / Taylor / Milner | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R GTD | Chevrolet | GTD Pro |
| 4 | Kasemets / Estep / Lucas | Ave Motorsports | | Ligier | JS P320 | | Nissan | LMP3 |
| 6 | Jaminet / Cameron / Tandy | Porsche Penske Motorsports (D) | Roger Penske | Porsche | 963 | | Porsche | GTP |
| 7 | Campbell / Nasr / Christensen | Porsche Penske Motorsports (D) | Roger Penske | Porsche | 963 | | Porsche | GTP |
| 8 | Farano / McLaughlin / Simpson | Tower Motorsports | | Oreca | 07 | | Gibson | LMP2 |
| 9 | Bachler / Vanthoor / Pilet | Pfaff Motorsports (CDN) | | Porsche | 992 GT3 R | I | Porsche | GTD Pro |
| 10 | Taylor / Albuquerque / Deletraz | Konica Minolta Acura ARX-06 (USA) | | Acura | ARX-06 | | Acura | GTP |
| 11 | Thomas / Huffaker / Jensen | TDS Racing | | Oreca | 07 | | Gibson | LMP2 |
| 12 | Telitz / Thompson / Montecalvo | VasserSullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 13 | Fidani / Bell / Kern | AWA (CDN) | Andrew Wojteczko | Duqueine | D08 | | Nissan | LMP3 |
| 14 | Hawksworth / Barnicoat / Kirkwood | Vasser Sullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD Pro |
| 16 | Heylen / Robichon / Hardwick | Wright Motorsports | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 17 | Mantella / Varrone / Boyd | AWA (CDN) | Andrew Wojteczko | Duqueine | D08 | | Nissan | LMP3 |
| 18 | Merriman / Rasmussen / Dalziel | Era Motorsport | | Oreca | 07 | | Gibson | LMP2 |
| 20 | Andersen / Jones / Fjordbach | High Class Racing | | Oreca | 07 | | Gibson | LMP2 |
| 21 | Mann / Molina / Castellacci | AF Corse (I) | Amato Ferrari | Ferrari | 296 | GT3 | Ferrari | GTD |
| 23 | Riberas / Gunn / Pittard | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD Pro |
| 24 | Farfus / Eng / Wittmann | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 25 | De Phillippi / van der Linde / Yelloly | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 27 | James / Sørensen / de Angelis | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 30 | Balogh / Grist / Dickerson | Jr III Racing | | Ligier | JS P320 | | Nissan | LMP3 |
| 31 | Derani / Aitken / Sims | Whelen Engineering Racing Cadillac (USA) | Bob Johnson | Cadillac | V-Series.R | | Cadillac | GTP |
| 32 | Grenier / Koch / Skeen | Team Korthoff Motorsports | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 33 | Willsey / Barbosa / Pino | Sean Creech Motorsport | | Ligier | JS P320 | | Nissan | LMP3 |
| 35 | Heriau / Pierson / Van Der Garde | TDS Racing | | Oreca | 07 | | Gibson | LMP2 |
| 36 | van Berlo / Chaves / Andretti | Andretti Autosport (USA) | Michael Andretti | Ligier | JS P320 | | Nissan | LMP3 |
| 38 | Allen / Nunez / Mau | Performance Tech Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 44 | Potter / Pumpelly / Lally | Magnus Racing (USA) | John Potter | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 47 | Sernagiotto / Fuoco / Lacorte | Cetilar Racing (I) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 51 | Lux / DeFrancesco / Fittipaldi | Rick Ware Racing | | Oreca | 07 | | Gibson | LMP2 |
| 52 | Keating / Chatin / Quinn | PR1 Mathiasen Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 57 | Ellis / Dontje / Ward | Winward Racing (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 60 | Blomqvist / Castroneves / Braun | Meyer Shank Racing w/ Curb Agajanian (USA) | | Acura | ARX-06 | | Acura | GTP |
| 62 | Serra / Rigon / Casagrande | Risi Competizione | | Ferrari | 296 | GT3 | Ferrari | GTD Pro |
| 63 | Perera / Pepper / Grosjean | Iron Lynx | Andrea Piccini | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD Pro |
| 66 | Monk / Miller / Legge | Gradient Racing | | Acura | NSX | GT3 Evo | Acura | GTD |
| 70 | Iribe / Millroy / Schandorff | Inception Racing (GB) | | McLaren | 720S | GT3 Evo | McLaren | GTD |
| 74 | Robinson / Burdon / Fraga | Riley (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 77 | Brynjolfsson / Hindman / Root | Wright Motorsports | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 78 | Spinelli / Goikhberg / Hites | Forte Racing Powered by USRT (USA) | | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 79 | Juncadella / Engel / Gounon | WeatherTech Racing (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD Pro |
| 80 | Hyett / Priaulx / Jeannette | AO Racing (USA) | Gunnar Jeannette | Porsche | 992 GT3 R | I | Porsche | GTD |
| 83 | Frey / Bovy / Gatting | Iron Dames (I) | Deborah Mayer | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 85 | Goldburg / van der Helm / Bechtolsheimer | JDC Miller MotorSports (USA) | | Duqueine | D08 | | Nissan | LMP3 |
| 91 | Metni / van Berlo / Evans | Kellymoss with Riley (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 92 | Brule / Andlauer / Udell | Kellymoss with Riley (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 93 | Marcelli / Formal / Harrison | Racers Edge Motorsports with WTR (USA) | | Acura | NSX | GT3 Evo 22 | Acura | GTD |
| 95 | Auberlen / Edwards / Hull | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD Pro |
| 96 | Gallagher / Foley / Dinan | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |