| 01 | van der Zande / Magnussen / *Dixon / *Ericsson | 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 | Mühlner Motorsports America (B) | | Duqueine | D08 | | Nissan | LMP3 |
| 7 | Kvamme / Norman / *Chaves / *Finelli | 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 | Hardwick / 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 / de Quesada / *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 / *Jaminet | 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 |