| 01 | Bourdais / Dixon / van der Zande | Cadillac Racing (USA) | Chip Ganassi | Cadillac | V-Series.R | | Cadillac | GTP |
| 023 | Rovera / Scardina / Triarsi | Triarsi Competizione (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 04 | Braun / Kurtz / Sowery | Crowdstrike Racing by APR (P) | | Oreca | 07 | | Gibson | LMP2 |
| 1 | Sellers / Snow / Verhagen | Paul Miller Racing (USA) | | BMW | M4 | G82 GT3 | BMW | GTD Pro |
| 2 | Hanley / Keating / Pino | United Autosports USA (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 3 | Garcia / Juncadella / Sims | Corvette Racing by Pratt Miller Motorsports (USA) | | Chevrolet | Corvette C8 | Z06 GT3.R | Chevrolet | GTD Pro |
| 4 | Bamber / Catsburg / Milner | Corvette Racing by Pratt Miller Motorsports (USA) | | Chevrolet | Corvette C8 | Z06 GT3.R | Chevrolet | GTD Pro |
| 5 | Andlauer / Bruni / Picariello | Proton Competition Mustang Sampling (D) | Christian Ried | Porsche | 963 | | Porsche | GTP |
| 6 | Jaminet / Makowiecki / Tandy | Porsche Penske Motorsports (D) | Roger Penske | Porsche | 963 | | Porsche | GTP |
| 7 | Cameron / Campbell / Nasr | Porsche Penske Motorsports (D) | Roger Penske | Porsche | 963 | | Porsche | GTP |
| 8 | Dinan / Eastwood / Farano | Tower Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 9 | Hinchcliffe / Jarvis / Kirchhöfer | Pfaff Motorsports (CDN) | | McLaren | 720S | GT3 Evo | McLaren | GTD Pro |
| 10 | Albuquerque / Hartley / Taylor | Wayne Taylor Racing with Andretti (USA) | Wayne Taylor | Acura | ARX-06 | | Acura | GTP |
| 11 | Jensen / McElrea / Thomas | TDS Racing (F) | | Oreca | 07 | | Gibson | LMP2 |
| 12 | Montecalvo / Telitz / Thompson | Vasser Sullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 13 | Bell / Fidani / Kern | AWA (CDN) | Andrew Wojteczko | Chevrolet | Corvette C8 | Z06 GT3.R | Chevrolet | GTD |
| 14 | Barnicoat / Hawksworth / Kirkwood | Vasser Sullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD Pro |
| 17 | Mantella / *Merrill / *Varrone | AWA (CDN) | Andrew Wojteczko | Chevrolet | Corvette C8 | Z06 GT3.R | Chevrolet | GTD |
| 18 | Dalziel / Merriman / Zilisch | Era Motorsport (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 19 | Bortolotti / Pepper / Perera | Iron Lynx (I) | Andrea Piccini | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD Pro |
| 20 | Andersen / Hörr / Lucas | MDK by High Class Racing (DK) | | Oreca | 07 | | Gibson | LMP2 |
| 21 | Hériau / Mann / Molina | AF Corse (I) | Amato Ferrari | Ferrari | 296 | GT3 | Ferrari | GTD |
| 22 | di Resta / Garg / Goldburg | United Autosports USA (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 23 | Farnbacher / Gunn / Riberas | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 Evo | Aston Martin | GTD Pro |
| 24 | Eng / Farfus / Krohn | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 25 | De Phillippi / Martin / Yelloly | BMW M Team RLL (USA) | | BMW | M Hybrid V8 | | BMW | GTP |
| 27 | de Angelis / James / Robichon | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 Evo | Aston Martin | GTD |
| 31 | Aitken / Blomqvist / Derani | Whelen Cadillac Racing (USA) | Bob Johnson | Cadillac | V-Series.R | | Cadillac | GTP |
| 32 | Grenier / *Koch / *Skeen | Korthoff/Preston Motorsports (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 33 | Barbosa / Edgar / Willsey | Sean Creech Motorsport (USA) | | Ligier | JS P217 | | Gibson | LMP2 |
| 34 | Costa / Franco / Sbirrazzuoli | Conquest Racing (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 40 | Deletraz / Herta / Taylor | Wayne Taylor Racing with Andretti (USA) | Wayne Taylor | Acura | ARX-06 | | Acura | GTP |
| 43 | Andretti / Chaves / Hargrove | Andretti Motorsports (USA) | Jarett Andretti | Porsche | 992 GT3 R | I | Porsche | GTD |
| 44 | Lally / Potter / Pumpelly | Magnus Racing (USA) | John Potter | Aston Martin | Vantage AMR | GT3 Evo | Aston Martin | GTD |
| 45 | Doyle / Formal / Marcelli | Wayne Taylor Racing with Andretti (USA) | | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 47 | Fuoco / Lacorte / Sernagiotto | Cetilar Racing (I) | | Ferrari | 296 | GT3 | Ferrari | GTD |
| 52 | Boulle / Dillmann / Smiechowski | Inter Europol by PR1 Mathiasen Motorsports (PL) | | Oreca | 07 | | Gibson | LMP2 |
| 55 | Hardwick / Levorato / Lewis | Proton Competition (D) | | Ford | Mustang GT3 | Gen 7 | Ford | GTD |
| 57 | Dontje / Ellis / Ward | Winward Racing (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 60 | Cressoni / Pulcini / Schiavoni | Iron Lynx (I) | Andrea Piccini | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD Pro |
| 62 | Calado / Rigon / Serra | Risi Competizione (USA) | | Ferrari | 296 | GT3 | Ferrari | GTD Pro |
| 63 | Cairoli / Caldarelli / Grosjean | Lamborghini Iron Lynx (I) | Andrea Piccini | Lamborghini | SC63 | | Lamborghini | GTP |
| 64 | Mies / Rockenfeller / Tincknell | Ford Multimatic Motorsports (CDN) | | Ford | Mustang GT3 | Gen 7 | Ford | GTD Pro |
| 65 | Hand / Müller / Vervisch | Ford Multimatic Motorsports (CDN) | | Ford | Mustang GT3 | Gen 7 | Ford | GTD Pro |
| 66 | Calderón / Legge / Monk | Gradient Racing (USA) | | Acura | NSX | GT3 Evo | Acura | GTD |
| 70 | Iribe / Millroy / Schandorff | Inception Racing (UK) | | McLaren | 720S | GT3 Evo | McLaren | GTD |
| 74 | Burdon / Fraga / Robinson | Riley (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 77 | Christensen / Heinrich / Priaulx | AO Racing (USA) | Gunnar Jeannette | Porsche | 992 GT3 R | I | Porsche | GTD Pro |
| 78 | DeFrancesco / Goikhberg / Spinelli | Forte Racing (USA) | | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 80 | Andrade / Andrews / Yoluc | Lone Star Racing (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 81 | Hedman / Jakobsen / Lindh | DragonSpeed (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 83 | Bovy / Frey / Gatting | Iron Dames (I) | Deborah Mayer | Lamborghini | Huracán | GT3 Evo2 | Lamborghini | GTD |
| 85 | Hanson / van der Helm / Westbrook | JDC-Miller MotorSports (USA) | | Porsche | 963 | | Porsche | GTP |
| 86 | Bachler / Fjordbach / Li | MDK Motorsports (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |
| 88 | Pérez Companc / Wadoux / *Nielsen | Richard Mille AF Corse (I) | | Oreca | 07 | | Gibson | LMP2 |
| 96 | Foley / Gallagher / Walker | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |
| 99 | Brabham / Chatin / Hyett | AO Racing (USA) | Gunnar Jeannette | Oreca | 07 | | Gibson | LMP2 |
| 120 | Adelson / Heylen / Skeer | Wright Motorsports (USA) | | Porsche | 992 GT3 R | I | Porsche | GTD |