| No. | Class | Team | Drivers | Car | Engine | Tyres | Fuel | |
|---|---|---|---|---|---|---|---|---|
| 1 | 37 | P | SMP Racing | Mikhail Aleshin | BR01 | Nissan | C | E10 |
| 2 | 2 | P | Tequila Patron ESM | Pipo Derani | Liger JS P2 | Honda | C | E10 |
| 3 | 60 | P | Michael Shank Racing | Ozz Negri Jr | Ligier JS PS2 | Honda HPD | C | E10 |
| 4 | 10 | P | Wayne Taylor Racing | Ricky Taylor | Corvette DP | Chevrolet | C | E10 |
| 5 | 01 | P | Chip Ganassi Racing | Alex Wurz | Riley DP | Ford EcoBoost | C | E10 |
| 6 | 31 | P | Action Express Racing | Dane Cameron | Corvette DP | Chevrolet | C | E10 |
| 7 | 02 | P | Chip Ganassi Racing | Scott Dixon | Riley DP | Ford EcoBoost | C | E10 |
| 8 | 90 | P | VisitFlorida.com Racing | Ryan Dalziel | Corvette DP | Chevrolet | C | E10 |
| 9 | 50 | P | Highway To Help | Dorsey Schroeder | Riley DP | BMW Power | C | E10 |
| 10 | 70 | P | SpeedSource | Tom Long | Mazda | Mazda (Petrol) | C | E10 |
| 11 | 5 | P | Action Express Racing | João Barbosa | Corvette DP | Chevrolet | C | E10 |
| 12 | 55 | P | SpeedSource | Tristan Nunez | Mazda | Mazda (Petrol) | C | E10 |
| 13 | 0 | P | DeltaWing Racing | Katherine Legge | DeltaWing DWC13 | Elan | C | E10 |
| 14 | 20 | PC | BAR1 Motorsports | Johnny Mowlem | ORECA FLM09 | Chevrolet | C | E10 |
| 15 | 85 | PC | JDC/Miller Motorsports | Stephen Simpson | ORECA FLM09 | Chevrolet | C | E10 |
| 16 | 26 | PC | BAR1 Motorsports | Ryan Eversley | ORECA FLM09 | Chevrolet | C | E10 |
| 17 | 38 | PC | Performance Tech Motorsports | James French | ORECA FLM09 | Chevrolet | C | E10 |
| 18 | 8 | PC | Starworks Motorsport | Alex Popow | ORECA FLM09 | Chevrolet | C | E10 |
| 19 | 88 | PC | Starworks | Sean Johnston | ORECA FLM09 | Chevrolet | C | E10 |
| 20 | 52 | PC | PR1/Mathiasen Motorsports | Tom Kimber-Smith | ORECA FLM09 | Chevrolet | C | E10 |
| 21 | 54 | PC | CORE autosport | Jon Bennett | ORECA FLM09 | Chevrolet | C | E10 |
| 22 | 911 | GTLM | Porsche North America | Nick Tandy | Porsche 911 RSR | Porsche | M | E20C |
| 23 | 912 | GTLM | Porsche North America | Frédéric Makowiecki | Porsche 911 RSR | Porsche | M | E20C |
| 24 | 100 | GTLM | BMW Team RLL | John Edwards | BMW M6 GTLM | BMW | M | E20C |
| 25 | 68 | GTLM | Scuderia Corsa | Alessandro Pier Guidi | Ferrari 488 GTE | Ferrari | M | E20C |
| 26 | 62 | GTLM | Risi Competizione | Toni Vilander | Ferrari 488 GTE | Ferrari | M | E20C |
| 27 | 25 | GTLM | BMW Team RLL | Dirk Werner | BMW M6 GTLM | BMW | M | E20C |
| 28 | 4 | GTLM | Corvette Racing | Oliver Gavin | Chevrolet Corvette C7.R | Chevrolet | M | E20C |
| 29 | 3 | GTLM | Corvette Racing | Jan Magnussen | Chevrolet Corvette C7.R | Chevrolet | M | E20C |
| 30 | 66 | GTLM | Ford Chip Ganassi Racing | Joey Hand | Ford GT | Ford Ecoboost | M | E20C |
| 31 | 67 | GTLM | Ford Chip Ganassi Racing | Ryan Briscoe | Ford GT | Ford Ecoboost | M | E20C |
| 32 | 72 | GTLM | SMP Racing | Gianmaria Bruni | Ferrari 488 GTE | Ferrari | M | E20C |
| 33 | 73 | GTD | Park Place Motorsports | Norbert Siedler | Porsche 911 GT3 R | Porsche | C | E10 |
| 34 | 28 | GTD | Konrad Motorsport | Marc Basseng | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 35 | 22 | GTD | Alex Job Racing | Leh Keen | Porsche 991 GT3 R | Porsche | C | E10 |
| 36 | 93 | GTD | Riley Motorsports | Damien Faulkner | Dodge Viper SRT | Dodge | C | E10 |
| 37 | 30 | GTD | Frikadelli Racing | Sven Muller | Porsche 991 GT3 R | Porsche | C | E10 |
| 38 | 33 | GTD | Riley Motorsports | Jeroen Bleekemolen | Dodge Viper SRT | Viper V10 | C | E10 |
| 39 | 98 | GTD | Aston Martin Racing | Richie Stanaway | Aston Martin V12 Vantage | Aston Martin | C | E10 |
| 40 | 23 | GTD | Team Seattle/Alex Job Racing | Mario Farnbacher | Porsche 991 GT3 R | Porsche | C | E10 |
| 41 | 11 | GTD | O'Gara Motorsport | Townsend Bell | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 42 | 44 | GTD | Magnus Racing | Andy Lally | Audi R8 LMS GT3 | Audi | C | E10 |
| 43 | 63 | GTD | Scuderia Corsa | Jeff Segal | Ferrari 488 GT3 | Ferrari | C | E10 |
| 44 | 007 | GTD | TRG-AMR | James Davison | Aston Martin V12 Vantage | Aston Martin | C | E10 |
| 45 | 97 | GTD | Turner Motorsport | Markus Palttala | BMW M6 GT3 | BMW | C | E10 |
| 46 | 51 | GTD | Spirit of Race | Raffaele Gianmaria | Ferrari 458 Italia | Ferrari | C | E10 |
| 47 | 6 | GTD | Stevenson Motorsports | Andrew Davis | Audi R8 LMS GT3 | Audi | C | E10 |
| 48 | 48 | GTD | Paul Miller Racing | Bryce Miller | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 49 | 45 | GTD | Flying Lizard Motorsports With Krohn Racing | Tracy Krohn | Audi R8 LMS | Audi | C | E10 |
| 50 | 21 | GTD | Konrad Motorsport | Emanuele Busnelli | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 51 | 540 | GTD | Black Swan Racing | Tim Pappas | Porsche 991 GT3 R | Porsche | C | E10 |
| 52 | 9 | GTD | Stevenson Motorsports | Dion von Moltke | Audi R8 LMS GT3 | Audi | C | E10 |
| 53 | 16 | GTD | Change Racing | Kaz Grala | Lamborghini Huracan GT3 | Lamborghini | C | E10 |
| 54 | 96 | GTD | Turner Motorsport | Jens Klingmann | BMW M6 GT3 | BMW | C | E10 |
