| No. | Class | Drivers | Team | Car |
|---|---|---|---|---|
| 01 | GTP | Renger van der Zande Sébastien Bourdais Scott Dixon | Cadillac Racing | Cadillac V-Series.R |
| 5 | GTP | Gianmaria Bruni Alessio Picariello Julien Andlauer | Proton Competition | Porsche 963 |
| 6 | GTP | Nick Tandy Mathieu Jaminet Frédéric Makowiecki | Porsche Penske Motorsports | Porsche 963 |
| 7 | GTP | Dane Cameron Felipe Nasr Matt Campbell | Porsche Penske Motorsports | Porsche 963 |
| 10 | GTP | Ricky Taylor Filipe Albuquerque Brendon Hartley | Wayne Taylor Racing with Andretti | Acura ARX-06 |
| 24 | GTP | Jesse Krohn Philipp Eng Augusto Farfus | BMW M Team RLL | BMW M Hybrid V8 |
| 25 | GTP | Connor de Phillippi Nick Yelloly Maxime Martin | BMW M Team RLL | BMW M Hybrid V8 |
| 31 | GTP | Pipo Derani Jack Aitken Tom Blomqvist | Whelen Engineering Cadillac Racing | Cadillac V-Series.R |
| 40 | GTP | Jordan Taylor Louis Delétraz Colton Herta | Wayne Taylor Racing with Andretti | Acura ARX-06 |
| 63 | GTP | Matteo Cairoli Andrea Caldarelli Romain Grosjean | Lamborghini Iron Lynx | Lamborghini SC63 |
| 85 | GTP | Tijmen van der Helm Richard Westbrook Phil Hanson | JDC-Miller MotorSports | Porsche 963 |
| 2 | LMP2 | Ben Keating Ben Hanley Nico Pino | United Autosports USA | Oreca 07-Gibson |
| 04 | LMP2 | George Kurtz Colin Braun Toby Sowery | CrowdStrike Racing by APR | Oreca 07-Gibson |
| 8 | LMP2 | John Farano Michael Dinan Charlie Eastwood | Tower Motorsports | Oreca 07-Gibson |
| 11 | LMP2 | Steven Thomas Mikkel Jensen Hunter McElrea | TDS Racing | Oreca 07-Gibson |
| 18 | LMP2 | Dwight Merriman Ryan Dalziel Connor Zilisch | Era Motorsport | Oreca 07-Gibson |
| 20 | LMP2 | Dennis Andersen Seth Lucas Laurents Hörr | MDK by High Class Racing | Oreca 07-Gibson |
| 22 | LMP2 | Dan Goldburg Paul di Resta Bijoy Garg | United Autosports USA | Oreca 07-Gibson |
| 33 | LMP2 | Lance Willsey João Barbosa Jonny Edgar | Sean Creech Motorsport | Ligier JS P217-Gibson |
| 52 | LMP2 | Nick Boulle Jakub Śmiechowski Tom Dillmann | Inter Europol by PR1 Mathiasen Motorsports | Oreca 07-Gibson |
| 74 | LMP2 | Gar Robinson Felipe Fraga Josh Burdon | Riley | Oreca 07-Gibson |
| 81 | LMP2 | Henrik Hedman Malthe Jakobsen Rasmus Lindh | DragonSpeed | Oreca 07-Gibson |
| 88 | LMP2 | Luis Perez Companc Nicklas Nielsen Lilou Wadoux | AF Corse | Oreca 07-Gibson |
| 99 | LMP2 | PJ Hyett Paul-Loup Chatin Matthew Brabham | AO Racing | Oreca 07-Gibson |
| 1 | GTD Pro | Bryan Sellers Madison Snow Neil Verhagen | Paul Miller Racing | BMW M4 GT3 |
| 3 | GTD Pro | Antonio García Alexander Sims Daniel Juncadella | Corvette Racing by Pratt Miller Motorsports | Chevrolet Corvette Z06 GT3.R |
| 4 | GTD Pro | Tommy Milner Nicky Catsburg Earl Bamber | Corvette Racing by Pratt Miller Motorsports | Chevrolet Corvette Z06 GT3.R |
| 9 | GTD Pro | Oliver Jarvis Marvin Kirchhöfer James Hinchcliffe | Pfaff Motorsports | McLaren GT3 Evo |
| 14 | GTD Pro | Jack Hawksworth Ben Barnicoat Kyle Kirkwood | Vasser Sullivan | Lexus RC F GT3 |
| 19 | GTD Pro | Jordan Pepper Franck Perera Mirko Bortolotti | Iron Lynx | Lamborghini Huracán GT3 EVO2 |
| 23 | GTD Pro | Ross Gunn Alex Riberas Mario Farnbacher | Heart of Racing Team | Aston Martin Vantage GT3 |
| 60 | GTD Pro | Claudio Schiavoni Matteo Cressoni Leonardo Pulcini | Iron Lynx | Lamborghini Huracán GT3 EVO2 |
| 62 | GTD Pro | Daniel Serra Davide Rigon James Calado | Risi Competizione | Ferrari 296 GT3 |
| 64 | GTD Pro | Mike Rockenfeller Harry Tincknell Chris Mies | Ford Multimatic Motorsports | Ford Mustang GT3 |
| 65 | GTD Pro | Joey Hand Dirk Müller Frédéric Vervisch | Ford Multimatic Motorsports | Ford Mustang GT3 |
| 77 | GTD Pro | Sebastian Priaulx Laurin Heinrich Michael Christensen | AO Racing | Porsche 911 GT3 R |
| 12 | GTD | Frankie Montecalvo Parker Thompson Aaron Telitz | Vasser Sullivan | Lexus RC F GT3 |
| 13 | GTD | Orey Fidani Matthew Bell Lars Kern | AWA | Chevrolet Corvette Z06 GT3.R |
| 17 | GTD | Anthony Mantella Nico Varrone Thomas Merrill | AWA | Chevrolet Corvette Z06 GT3.R |
| 21 | GTD | Simon Mann François Heriau Miguel Molina | AF Corse | Ferrari 296 GT3 |
| 023 | GTD | Onofrio Triarsi Charlie Scardina Alessio Rovera | Triarsi Competizione | Ferrari 296 GT3 |
| 27 | GTD | Roman de Angelis Zacharie Robichon Ian James | Heart of Racing Team | Aston Martin Vantage GT3 |
| 32 | GTD | Mike Skeen Mikaël Grenier Kenton Koch | Korthoff Preston Motorsports | Mercedes-AMG GT3 |
| 34 | GTD | Manny Franco Albert Costa Cedric Sbirrazzuoli | Conquest Racing | Ferrari 296 GT3 |
| 43 | GTD | Jarett Andretti Gabby Chaves Scott Hargrove | Andretti Motorsports | Porsche 911 GT3 R |
| 44 | GTD | John Potter Andy Lally Spencer Pumpelly | Magnus Racing | Aston Martin Vantage GT3 |
| 45 | GTD | Kyle Marcelli Danny Formal Graham Doyle | Wayne Taylor Racing with Andretti | Lamborghini Huracán GT3 EVO2 |
| 47 | GTD | Roberto Lacorte Giorgio Sernagiotto Antonio Fuoco | Cetilar Racing | Ferrari 296 GT3 |
| 55 | GTD | Ryan Hardwick Giammarco Levorato Corey Lewis | Proton Competition | Ford Mustang GT3 |
| 57 | GTD | Russell Ward Philip Ellis Indy Dontje | Winward Racing | Mercedes-AMG GT3 |
| 66 | GTD | Katherine Legge Sheena Monk Tatiana Calderón | Gradient Racing | Acura NSX GT3 Evo |
| 70 | GTD | Brendan Iribe Frederik Schandorff Ollie Millroy | Inception Racing | McLaren GT3 Evo |
| 78 | GTD | Misha Goikhberg Loris Spinelli Devlin DeFrancesco | Forte Racing | Lamborghini Huracán GT3 EVO2 |
| 80 | GTD | Salih Yoluç Rui Andrade Scott Andrews | Lone Star Racing | Mercedes-AMG GT3 |
| 83 | GTD | Michelle Gatting Sarah Bovy Rahel Frey | Iron Dames | Lamborghini Huracán GT3 EVO2 |
| 86 | GTD | Li Kerong Anders Fjørdbach Klaus Bachler | MDK Motorsports | Porsche 911 GT3 R |
| 96 | GTD | Robby Foley Patrick Gallagher Jake Walker | Turner Motorsport | BMW M4 GT3 |
| 120 | GTD | Adam Adelson Elliott Skeer Jan Heylen | Wright Motorsport | Porsche 911 GT3 R |
Feature image © Andrew “Skippy” Hall / Dailysportscar.com