| 01 | van der Zande / Bourdais / Dixon / Palou | Cadillac Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 02 | Bamber / Lynn / Ericsson / Magnussen | Cadillac Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 2 | Vanthoor / Pilet / Olsen / Imperatori | KCMG (HK) | | Porsche | 991 GT3 R | | Porsche | GTD Pro |
| 3 | Garcia / Taylor / Catsburg | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R GTD | Chevrolet | GTD Pro |
| 4 | Milner / Tandy / Sørensen | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R GTD | Chevrolet | GTD Pro |
| 5 | Vautier / Westbrook / Duval / Keating | JDC Miller MotorSports (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 6 | Castro / Kranz / Ori / Miller | Muehlner Motorsports America (B) | | Duqueine | D08 | | Nissan | LMP3 |
| 7 | Kvamme / McCusker / Estep / Doquin | Forty7 Motorsports (USA) | | Duqueine | D08 | | Nissan | LMP3 |
| 8 | Farano / Deletraz / Pinto de Andrade / Habsburg | Tower Motorsport (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 9 | Campbell / Jaminet / Nasr | Pfaff Motorsports (CDN) | | Porsche | 991 GT3 R | | Porsche | GTD Pro |
| 10 | Taylor / Albuquerque / Rossi / Stevens | Konica Minolta Acura ARX-05 (USA) | Wayne Taylor | Acura | ARX-05 | | Acura | DPi |
| 11 | Thomas / Pierson / Bomarito / Tincknell | PR1 Mathiasen Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 12 | Montecalvo / Telitz / Heistand / Bell | VasserSullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 13 | Fidani / Wittmer / Kern / Bell | AWA (CDN) | Andrew Wojteczko | Duqueine | D08 | | Nissan | LMP3 |
| 14 | Hawksworth / Barnicoat / Kirkwood | VasserSullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD Pro |
| 15 | Müller / Assenheimer / Cindric | Proton USA (D) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD Pro |
| 16 | Hardwick / Robichon / Heylen / Lietz | Wright Motorsports (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 18 | Merriman / Tilley / Dalziel / Chatin | Era Motorsport (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 19 | Sweedler / Megrue / Altoè / Segal | TR3 Racing (USA) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 20 | Andersen / Fjordbach / Scherer / Müller | High Class Racing (DK) | | Oreca | 07 | | Gibson | LMP2 |
| 21 | Mann / Pérez Companc / Nielsen / Vilander | AF Corse (I) | Amato Ferrari | Ferrari | 488 | GT3 | Ferrari | GTD |
| 22 | McGuire / Smith / Hanson / Owen | United Autosports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 23 | Gunn / Riberas / *Martin | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD Pro |
| 24 | Eng / Wittmann / Yelloly / van der Linde | BMW M Team RLL (USA) | | BMW | M4 | G82 GT3 | BMW | GTD Pro |
| 25 | De Phillippi / Edwards / Farfus / Krohn | BMW M Team RLL (USA) | | BMW | M4 | G82 GT3 | BMW | GTD Pro |
| 26 | Siegel / Shields / Crews / de Wilde | Muehlner Motorsports America (B) | | Duqueine | D08 | | Nissan | LMP3 |
| 27 | de Angelis / James / Turner / Gamble | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 28 | de Quesada / Morad / Lundqvist / Götz | Alegra Motorsports (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 29 | van Eerd / Van Der Garde / Murry / VeeKay | Racing Team Nederland (NL) | | Oreca | 07 | | Gibson | LMP2 |
| 31 | Derani / Nunez / Conway | Whelen Engineering Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 32 | Skeen / Davison / McAleer / Andrews | Gilbert Korthoff Motorsports (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 33 | Barbosa / Jakobsen / Priaulx / Willsey | Sean Creech Motorsport (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 34 | Washington / Sofronas / *Bleekemolen / *Bachler | GMG Racing (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 36 | Andretti / Burdon / Lindh / Chaves | Andretti Autosport (USA) | Michael Andretti | Ligier | JS P320 | | Nissan | LMP3 |
| 38 | Goldburg / Abe / Grist / Pino | Performance Tech Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 39 | Megennis / Lewis / Mitchell / Westphal | CarBahn with Peregrine Racing (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 42 | Yount / Hites / Conwright / Palttala | NTE/SSR (USA) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 44 | Potter / Lally / Pumpelly / Adam | Magnus Racing (USA) | John Potter | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 47 | Lacorte / Sernagiotto / Fuoco / Rovera | Cetilar Racing (I) | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 48 | Rockenfeller / Kobayashi / Johnson / Lopez | Ally Cadillac (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 52 | Keating / Jensen / Huffaker / Lapierre | PR1 Mathiasen Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 54 | Bennett / Braun / Kurtz / Jönsson | CORE Autosport (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 57 | Ward / Ellis / Grenier / Auer | Winward Racing (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 59 | Bergstein / Miller / Gallagher / Holton | Crucial Motorsports (USA) | | McLaren | 720S | GT3 | McLaren | GTD |
| 60 | Jarvis / Blomqvist / Castroneves / Pagenaud | Meyer Shank Racing W/Curb-Agajanian (USA) | Michael Shank | Acura | ARX-05 | | Acura | DPi |
| 62 | Pier Guidi / Calado / Serra / Rigon | Risi Competizione (USA) | | Ferrari | 488 | GT3 | Ferrari | GTD Pro |
| 63 | Ineichen / Mapelli / Caldarelli / Bortolotti | TR3 Racing (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD Pro |
| 64 | Giovanis / Plumb / Plumb / Trinkler | TeamTGM (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 66 | Simpson / Bechtolsheimer / Miller / Farnbacher | Gradient Racing (USA) | | Acura | NSX | GT3 | Acura | GTD |
| 68 | Heriau / Rasmussen / Jones / Rast | G-Drive Racing By APR (RUS) | | Oreca | 07 | | Gibson | LMP2 |
| 69 | Falb / Allen / Ghiotto / van der Helm | G-Drive Racing By APR (RUS) | | Oreca | 07 | | Gibson | LMP2 |
| 70 | Iribe / Schandorff / Millroy / Pepper | Inception Racing (GB) | | McLaren | 720S | GT3 | McLaren | GTD |
| 71 | Goikhberg / Perera / Llarena / Paul | T3 Motorsport North America (D) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 74 | Robinson / Fraga / van Berlo / Cooper | Riley Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 75 | Habul / Stolz / *Schiller / *Marciello | Sun Energy 1 (AUS) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 79 | MacNeil / Andlauer / Cairoli / Picariello | WeatherTech Racing (USA) | | Porsche | 991 GT3 R | | Porsche | GTD Pro |
| 81 | Lux / DeFrancesco / O'Ward / Herta | DragonSpeed USA (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 96 | Foley / Auberlen / Dinan / Klingmann | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |
| 97 | MacNeil / Juncadella / Engel / Gounon | WeatherTech Racing (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD Pro |
| 98 | Dalla Lana / Pittard / Eastwood / Thiim | Northwest AMR (CDN) | | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 99 | Ferriol / Legge / Wilson / Boulle | Team Hardpoint (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |