| 01 | van der Zande / Magnussen / Dixon | Cadillac Chip Ganassi Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 1 | Sellers / Snow / Lewis / Caldarelli | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 3 | Taylor / Catsburg / Garcia | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R | Chevrolet | GTLM |
| 4 | Tandy / Sims / Milner | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R | Chevrolet | GTLM |
| 5 | Vautier / Duval / Bourdais | Mustang Sampling/JDC-Miller MotorSports (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 6 | Kranz / Hörr / Koch / McAleer | Mühlner Motorsports America (B) | | Duqueine | D08 | | Nissan | LMP3 |
| 7 | Kvamme / Norman / Chaves / Estep | Forty7 Motorsports | | Duqueine | D08 | | Nissan | LMP3 |
| 8 | Farano / Aubry / Buret / Vaxiviere | Tower Motorsport | | Oreca | 07 | | Gibson | LMP2 |
| 9 | Robichon / Vanthoor / Kern / Campbell | Pfaff Motorsports (CDN) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 10 | Taylor / Albuquerque / Rossi / Castroneves | Konica Minolta Acura (USA) | Wayne Taylor | Acura | ARX-05 | | Acura | DPi |
| 11 | Thomas / Nunez / Merrill / Bell | WIN Autosport | | Oreca | 07 | | Gibson | LMP2 |
| 12 | Veach / Megennis / Bell / Montecalvo | Vasser-Sullivan Racing (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 14 | Telitz / Gavin / Hawksworth / Kirkwood | Vasser-Sullivan Racing (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 16 | Hindman / Long / Heylen / Bachler | Wright Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 18 | Merriman / Chatin / Tilley / Dalziel | Era Motorsport (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 19 | Goikhberg / Perera / Costa / Zimmermann | GRT Grasser Racing Team (A) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 20 | Andersen / Habsburg / Fjordbach / Kubica | High Class Racing (DK) | | Oreca | 07 | | Gibson | LMP2 |
| 21 | Mann / Nielsen / Serra / Cressoni | AF Corse (I) | Amato Ferrari | Ferrari | 488 | GT3 | Ferrari | GTD |
| 23 | James / de Angelis / Turner / Gunn | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 24 | Farfus / Wittmann / Edwards / Krohn | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 25 | Glock / Eng / De Phillippi / Spengler | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 28 | Morad / Skeen / Johnson / Buhk | Alegra Motorsports | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 29 | van Eerd / van der Garde / van Uitert / Milesi | Racing Team Nederland | | Oreca | 07 | | Gibson | LMP2 |
| 31 | Nasr / Derani / Conway / Elliott | Whelen Engineering Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 33 | Willsey / Barbosa / Boyd / Clairay | Sean Creech Motorsport | | Ligier | JS P320 | | Nissan | LMP3 |
| 38 | Lindh / Cassels / Llarena / Ori | Performance Tech Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 42 | Metni / Davis / Hildebrand / Yount | NTE Sport | | Audi | R8 LMS | GT3 | Audi | GTD |
| 44 | Potter / Lally / Pumpelly / Farnbacher | Magnus Racing with Archangel Motorsports | | Acura | NSX | GT3 | Acura | GTD |
| 47 | Lacorte / Fuoco / Belicchi / Sernagiotto | Cetilar Racing (I) | Raimondo Amadio | Dallara | P217 | | Gibson | LMP2 |
| 48 | Johnson / Kobayashi / Pagenaud / Rockenfeller | Ally Cadillac Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 51 | Ware / Yoluc / Dillon / Müller | RWR Eurasia (PHL) | Mark Goddard | Ligier | JS P217 | | Gibson | LMP2 |
| 52 | Keating / Jensen / Huffaker / Lapierre | PR1 Mathiasen Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 54 | Bennett / Kurtz / Braun / McMurry | Core Motorsport | | Ligier | JS P320 | | Nissan | LMP3 |
| 55 | Jarvis / Tincknell / Bomarito | Mazda Motorsports | | Mazda | RT24-P | | Mazda | DPi |
| 57 | Ward / Ellis / Dontje / Engel | Winward Racing (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 60 | Cameron / Pla / Montoya / Allmendinger | Meyer Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | ARX-05 | | Acura | DPi |
| 62 | Calado / Pier Guidi / Gounon / Rigon | Risi Competizione | | Ferrari | 488 | GTE | Ferrari | GTLM |
| 63 | Jones / Curtis / Briscoe / Gomes | Scuderia Corsa | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 64 | Giovanis / Trinkler / Plumb / Plumb | Team TGM | | Porsche | 991 GT3 R | | Porsche | GTD |
| 74 | Robinson / Pigot / Andrews / Askew | Riley Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 75 | Habul / Marciello / Grenier / Stolz | SunEnergy1 Racing | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 79 | MacNeil / Estre / Lietz / Bruni | WeatherTech Racing (USA) | | Porsche | 991 RSR | II 19 | Porsche | GTLM |
| 81 | Hodes / Grist / Hanley / VeeKay | DragonSpeed USA (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 82 | Lux / DeFrancesco / Mies / Schiller | DragonSpeed USA | | Oreca | 07 | | Gibson | LMP2 |
| 88 | Nielsen / Bamber / Ferriol / Legge | Team Hardpoint EBM | | Porsche | 991 GT3 R | | Porsche | GTD |
| 91 | Cox / Murry / McCusker / Bleekemolen | Riley Motorsports | | Ligier | JS P320 | | Nissan | LMP3 |
| 96 | Auberlen / Foley / Read / Herta | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 97 | Root / Eastwood / Keating / Westbrook | TF Sport (GB) | Tom Ferrier | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 111 | Ineichen / Bortolotti / Schothorst / Mapelli | GRT Grasser Racing Team | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |