| 01 | Bourdais / van der Zande / Dixon | Cadillac Racing (USA) | Chip Ganassi | Cadillac | V-Series.R | | Cadillac | GTP |
| 023 | Triarsi / Scardina / Rovera | Triarsi Competizione (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 04 | Kurtz / Hanley / Siegel | Crowdstrike Racing by APR (P) | | Oreca | 07 | | Gibson | LMP2 |
| 1 | Sellers / Snow / 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 |
| 5 | van der Helm / Rockenfeller / Button | JDC Miller MotorSports (USA) | | Porsche | 963 | | Porsche | GTP |
| 6 | Tandy / Jaminet / Vanthoor | Porsche Penske Motorsports (D) | Roger Penske | Porsche | 963 | | Porsche | GTP |
| 7 | Campbell / Nasr / Newgarden | Porsche Penske Motorsports (D) | Roger Penske | Porsche | 963 | | Porsche | GTP |
| 8 | Balogh / McLaughlin / Simpson | Tower Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 9 | Bachler / Pilet / Estre | 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 / Jensen / Huffaker | TDS Racing (F) | | Oreca | 07 | | Gibson | LMP2 |
| 12 | Montecalvo / Telitz / Thompson | Vasser Sullivan (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 | Hardwick / Robichon / Heylen | Wright Motorsports (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 17 | Mantella / Boyd / *Varrone | AWA (CDN) | Andrew Wojteczko | Duqueine | D08 | | Nissan | LMP3 |
| 18 | Merriman / Dalziel / Rasmussen | Era Motorsport (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 20 | Andersen / Jones / Fjordbach | High Class Racing (DK) | | Oreca | 07 | | Gibson | LMP2 |
| 23 | Gunn / Riberas / Pittard | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD Pro |
| 24 | Eng / Wittmann / Farfus | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 25 | van der Linde / De Phillippi / Yelloly | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 27 | de Angelis / Sørensen / James | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 30 | Dickerson / Garg / Grist | Jr III Racing (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 31 | Derani / Sims / Aitken | Whelen Engineering Cadillac Racing (USA) | Bob Johnson | Cadillac | V-Series.R | | Cadillac | GTP |
| 32 | Skeen / Grenier / Koch | Team Korthoff Motorsports (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 35 | Falb / Van Der Garde / Pierson | TDS Racing (F) | | Oreca | 07 | | Gibson | LMP2 |
| 36 | Andretti / van Berlo / *Chaves | Andretti Autosport (USA) | Michael Andretti | Ligier | JS P320 | | Nissan | LMP3 |
| 38 | Thienes / Woolridge / Shields | Performance Tech Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 44 | Potter / Lally / Pumpelly | Magnus Racing (USA) | John Potter | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 47 | Lacorte / Sernagiotto / Fuoco | Cetilar Racing (I) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 52 | Keating / Chatin / Quinn | PR1 Mathiasen Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 57 | Ward / Ellis / Dontje | Winward Racing (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 59 | Tincknell / Bruni / Jani | Proton Competition (D) | Christian Ried | Porsche | 963 | | Porsche | GTP |
| 60 | Blomqvist / Braun / Castroneves | Meyer Shank Racing w/ Curb Agajanian (USA) | | Acura | ARX-06 | | Acura | GTP |
| 61 | Mann / Molina / Calado | AF Corse (I) | Amato Ferrari | Ferrari | 296 | GT3 | Ferrari | GTD Pro |
| 62 | Pier Guidi / Serra / Rigon | Risi Competizione (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD Pro |
| 63 | Bortolotti / Pepper / Perera | Iron Lynx (I) | Andrea Piccini | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD Pro |
| 66 | Monk / Legge / Miller | Gradient Racing (USA) | | Acura | NSX | GT3 Evo | Acura | GTD |
| 70 | Iribe / *Schandorff / *Millroy | Inception Racing (GB) | | McLaren | 720S | GT3 Evo | McLaren | GTD |
| 74 | Robinson / Fraga / Burdon | Riley (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 77 | Brynjolfsson / Hindman / Root | Wright Motorsports (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 78 | Goikhberg / Spinelli / Liddy | Forte Racing Powered by USRT (USA) | | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 79 | Juncadella / Gounon / Engel | 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 / Pin / Gatting | Iron Dames (I) | Deborah Mayer | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 85 | Bechtolsheimer / Goldburg / Lindh | JDC Miller MotorSports (USA) | | Duqueine | D08 | | Nissan | LMP3 |
| 88 | Perrodo / Vaxiviere / Collard | AF Corse (I) | | Oreca | 07 | | Gibson | LMP2 |
| 92 | Brule / Udell / Andlauer | Kellymoss with Riley (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 93 | Harrison / Formal / Marcelli | Racers Edge Motorsports with WTR (USA) | | Acura | NSX | GT3 Evo 22 | Acura | GTD |
| 96 | Gallagher / Foley / Dinan | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |
| 97 | Auberlen / Hull / Merrill | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |