| 3 | Garcia / Taylor / Catsburg | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R | Chevrolet | GTLM |
| 4 | Gavin / Milner / Fässler | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R | Chevrolet | GTLM |
| 5 | Bourdais / Vautier / Duval | Mustang Sampling Racing/JDC-Miller MotorSports (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 6 | Montoya / Cameron / Pagenaud | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | DPi |
| 7 | Castroneves / Taylor / Rossi | Acura Team Penske (USA) | Roger Penske | Acura | ARX-05 | | Acura | DPi |
| 8 | Farano / Jensen / Heinemeier Hansson | Tower Motorsport by Starworks | | Oreca | 07 | | Gibson | LMP2 |
| 10 | van der Zande / Briscoe / Dixon | Konica Minolta Cadillac DPi-V.R (USA) | Wayne Taylor | Cadillac | DPi-V.R | | Cadillac | DPi |
| 11 | Heistand / Schothorst / Perera | GRT Grasser Racing | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 12 | Montecalvo / Bell / de Quesada | AIM Vasser-Sullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 14 | Hawksworth / Telitz / Kirkwood | AIM Vasser-Sullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 16 | Hardwick / Long / Heylen | Wright Motorsports | | Porsche | 991 GT3 R | | Porsche | GTD |
| 23 | James / de Angelis / Turner | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 24 | Farfus / Krohn / Edwards | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 25 | Spengler / De Phillippi / Herta | BMW Team RLL (USA) | | BMW | M8 | GTE | BMW | GTLM |
| 30 | Ferriol / Davis / Kaffer | Team Hardpoint | | Audi | R8 LMS | GT3 | Audi | GTD |
| 31 | Nasr / Derani / Chaves | Whelen Engineering Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 38 | Yount / Byrne / Cosmo | Performance Tech Motorsports (GB) | | Oreca | 07 | | Gibson | LMP2 |
| 44 | Lally / Potter / Pumpelly | GRT Magnus (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 48 | Sellers / Snow / Lewis | Paul Miller Racing (USA) | Paul Miller | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 51 | Smiechowski / Rao / Bell | Inter Europol Competition (PL) | Jakub Smiechowski | Oreca | 07 | | Gibson | LMP2 |
| 52 | Kelly / Trummer / Huffaker | PR1 Mathiasen Motorsports | | Oreca | 07 | | Gibson | LMP2 |
| 55 | Bomarito / Tincknell / Hunter-Reay | Mazda Motorsports | | Mazda | RT24-P | | Mazda | DPi |
| 57 | Goikhberg / Hindman / Hand | Heinricher Racing w/MSR Curb-Agajanian | | Acura | NSX | GT3 | Acura | GTD |
| 63 | MacNeil / Balzan / Westphal | Scuderia Corsa | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 74 | Robinson / Aschenbach / Miller | Riley Motorsports (USA) | | Mercedes-AMG | GT3 | Evo | Mercedes-AMG | GTD |
| 77 | Jarvis / Nunez / Pla | Mazda Motorsports | | Mazda | RT24-P | | Mazda | DPi |
| 85 | Leist / Simpson / Andrews | JDC-Miller MotorSports (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 86 | McMurry / Farnbacher / Michimi | Meyer Shank Racing w/ Curb-Agajanian (USA) | Michael Shank | Acura | NSX | GT3 | Acura | GTD |
| 96 | Foley / Machavern / Yelloly | Turner Motorsport | | BMW | M6 | F13 GT3 | BMW | GTD |
| 911 | Tandy / Makowiecki / Bamber | Porsche GT Team | | Porsche | 991 RSR | II 19 | Porsche | GTLM |
| 912 | Bamber / Vanthoor / Jani | Porsche GT Team | | Porsche | 991 RSR | II 19 | Porsche | GTLM |