| 01 | Bourdais / van der Zande / Dixon | Cadillac Racing (USA) | Chip Ganassi | Cadillac | V-Series.R | | Cadillac | GTP |
| 023 | Rigon / Triarsi / Scardina / Agostini | Triarsi Competizione (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 04 | Kurtz / Braun / Sowery | Crowdstrike Racing by APR (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 1 | Sellers / Snow | Paul Miller Racing (USA) | | BMW | M4 | G82 GT3 | BMW | GTD Pro |
| 3 | Garcia / Sims / Juncadella | Corvette Racing by Pratt Miller Motorsports (USA) | | Chevrolet | Corvette C8 | Z06 GT3.R | Chevrolet | GTD Pro |
| 4 | Milner / Catsburg | Corvette Racing by Pratt Miller Motorsports (USA) | | Chevrolet | Corvette C8 | Z06 GT3.R | Chevrolet | GTD Pro |
| 6 | Estre / Tandy / Vanthoor / Jaminet | Porsche Penske Motorsport (D) | | Porsche | 963 | | Porsche | GTP |
| 7 | Cameron / Nasr / Campbell / Newgarden | Porsche Penske Motorsport (D) | Roger Penske | Porsche | 963 | | Porsche | GTP |
| 8 | Eastwood / Dinan | Tower Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 10 | Taylor / Albuquerque / Deletraz / Ericsson | Wayne Taylor Racing with Andretti (USA) | | Acura | ARX-06 | | Acura | GTP |
| 11 | Thomas / Jensen / McElrea | TDS Racing (F) | | Oreca | 07 | | Gibson | LMP2 |
| 12 | Montecalvo / Thompson / Telitz / Miyata | VasserSullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 14 | | VasserSullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD Pro |
| 19 | Perera / Pepper / Bortolotti / Caldarelli | Iron Lynx (I) | Andrea Piccini | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD Pro |
| 21 | | AF Corse (I) | Amato Ferrari | Ferrari | 296 | GT3 | Ferrari | GTD |
| 23 | de Angelis / Gunn / Riberas / Farnbacher | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage GT3 Evo | | Aston Martin | GTD Pro |
| 24 | Krohn / Farfus | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 25 | De Phillippi / Martin | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 31 | Derani / Aitken / Blomqvist | Whelen Cadillac Racing (USA) | Bob Johnson | Cadillac | V-Series.R | | Cadillac | GTP |
| 32 | Adam Christodoulou | Korthoff/Preston Motorsports (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 33 | Barbosa / Willsey / Edgar | Sean Creech Motorsports (USA) | | Ligier | JS P217 | | Gibson | LMP2 |
| 34 | Franco / Costa / Sbirrazzuoli / Balzan | Conquest Racing (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 40 | Taylor / Herta / Button / Deletraz | Wayne Taylor Racing with Andretti (USA) | | Acura | ARX-06 | | Acura | GTP |
| 44 | | Magnus Racing (USA) | | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 45 | Marcelli / Formal / Harrison / Doyle | Wayne Taylor Racing with Andretti (USA) | | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 47 | | Cetilar Racing (I) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 52 | Dillmann / Novalak / Smiechowski | Inter Europol by PR1 Mathiasen Motorsports (PL) | | Oreca | 07 | | Gibson | LMP2 |
| 57 | Morad / Ward | Winward Racing (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 60 | | Iron Lynx (I) | Andrea Piccini | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 62 | Alessandro Pier Guidi | Risi Competizione (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD Pro |
| 63 | Grosjean / Caldarelli / Bortolotti / Kvyat | Lamborghini Iron Lynx (I) | Andrea Piccini | Lamborghini | SC63 | | Lamborghini | GTP |
| 64 | Rockenfeller / Tincknell | Ford Multimatic Motorsports (CDN) | | Ford | Mustang GT3 | Gen 7 | Ford | GTD Pro |
| 65 | Müller / Hand | Ford Multimatic Motorsports (CDN) | | Ford | Mustang GT3 | Gen 7 | Ford | GTD Pro |
| 66 | Legge / Monk / Calderón / McAleer | Gradient Racing (USA) | | Acura | NSX | GT3 | Acura | GTD |
| 70 | | Inception Racing (GB) | | McLaren | 720S | GT3 Evo | McLaren | GTD |
| 74 | Robinson / Fraga / Burdon / Massa | Riley (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 78 | Goikhberg / Spinelli / DeFrancesco | Forte Racing (USA) | | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 83 | Frey / Pin / Gatting / Bovy | Iron Dames (I) | | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 88 | Pérez Companc / Nielsen | Richard Mille AF Corse (I) | | Oreca | 07 | | Gibson | LMP2 |
| 91 | | Kellymoss with Riley (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 92 | Brule / Udell | Kellymoss with Riley (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 96 | Foley / Gallagher | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |
| 120 | Adelson / Skeer / Heylen | Wright Motorsports (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |