| No. | Class | Drivers | Team | Car |
|---|---|---|---|---|
| 01 | GTP | Sébastien Bourdais Renger van der Zande Scott Dixon Álex Palou | Cadillac Racing | Cadillac V-Series.R |
| 5 | GTP | Gianmaria Bruni Neel Jani Alessio Picariello Romain Dumas | Proton Competition | Porsche 963 |
| 6 | GTP | Nick Tandy Mathieu Jaminet Kévin Estre Laurens Vanthoor | Porsche Penske Motorsports | Porsche 963 |
| 7 | GTP | Dane Cameron Felipe Nasr Josef Newgarden Matt Campbell | Porsche Penske Motorsports | Porsche 963 |
| 10 | GTP | Ricky Taylor Filipe Albuquerque Brendon Hartley Marcus Ericsson | Wayne Taylor Racing with Andretti | Acura ARX-06 |
| 24 | GTP | Jesse Krohn Philipp Eng Augusto Farfus Dries Vanthoor | BMW M Team RLL | BMW M Hybrid V8 |
| 25 | GTP | Connor de Phillippi Nick Yelloly Maxime Martin René Rast | 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 Jenson Button | Wayne Taylor Racing with Andretti | Acura ARX-06 |
| 85 | GTP | Richard Westbrook Phil Hanson Ben Keating Tijmen van der Helm | JDC-Miller MotorSports | Porsche 963 |
| 2 | LMP2 | Ben Keating Ben Hanley Nico Pino Pato O'Ward | United Autosports USA | Oreca 07-Gibson |
| 04 | LMP2 | George Kurtz Colin Braun Toby Sowery Malthe Jakobsen | CrowdStrike Racing by APR | Oreca 07-Gibson |
| 8 | LMP2 | John Farano Michael Dinan Scott McLaughlin Ferdinand Habsburg | Tower Motorsports | Oreca 07-Gibson |
| 11 | LMP2 | Steven Thomas Mikkel Jensen Hunter McElrea Charles Milesi | TDS Racing | Oreca 07-Gibson |
| 18 | LMP2 | Dwight Merriman Ryan Dalziel Connor Zilisch Christian Rasmussen | Era Motorsport | Oreca 07-Gibson |
| 20 | LMP2 | Dennis Andersen Seth Lucas Laurents Hörr Scott Huffaker | MDK by High Class Racing | Oreca 07-Gibson |
| 22 | LMP2 | Dan Goldburg Paul di Resta Bijoy Garg Felix Rosenqvist | United Autosports USA | Oreca 07-Gibson |
| 33 | LMP2 | Lance Willsey João Barbosa Jonny Edgar Nolan Siegel | Sean Creech Motorsport | Ligier JS P217-Gibson |
| 52 | LMP2 | Nick Boulle Jakub Śmiechowski Tom Dillmann Pietro Fittipaldi | Inter Europol by PR1 Mathiasen Motorsports | Oreca 07-Gibson |
| 74 | LMP2 | Gar Robinson Felipe Fraga Josh Burdon Felipe Massa | Riley | Oreca 07-Gibson |
| 81 | LMP2 | Eric Lux James Allen Kyffin Simpson Sebastian Alvarez | DragonSpeed | Oreca 07-Gibson |
| 88 | LMP2 | Luis Perez Companc Nicklas Nielsen Lilou Wadoux Matthieu Vaxivière | AF Corse | Oreca 07-Gibson |
| 99 | LMP2 | PJ Hyett Paul-Loup Chatin Matthew Brabham Alex Quinn | AO Racing | Oreca 07-Gibson |
| 1 | GTD Pro | Bryan Sellers Madison Snow Neil Verhagen Sheldon van der Linde | 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 Alexander Rossi | Pfaff Motorsports | McLaren 720S GT3 Evo |
| 14 | GTD Pro | Jack Hawksworth Ben Barnicoat Kyle Kirkwood Mike Conway | Vasser Sullivan | Lexus RC F GT3 |
| 19 | GTD Pro | Mirko Bortolotti Jordan Pepper Andrea Caldarelli Franck Perera | 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 Matteo Cairoli Romain Grosjean | Iron Lynx | Lamborghini Huracán GT3 EVO2 |
| 62 | GTD Pro | Davide Rigon Daniel Serra Alessandro Pier Guidi 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 |
| 75 | GTD Pro | Maro Engel Jules Gounon Luca Stolz Kenny Habul | SunEnergy1 Racing | Mercedes-AMG GT3 |
| 77 | GTD Pro | Sebastian Priaulx Laurin Heinrich Michael Christensen | AO Racing | Porsche 911 GT3 R |
| 12 | GTD | Frankie Montecalvo Parker Thompson Aaron Telitz Ritomo Miyata | Vasser Sullivan | Lexus RC F GT3 |
| 13 | GTD | Orey Fidani Matthew Bell Lars Kern Alex Lynn | AWA | Chevrolet Corvette Z06 GT3.R |
| 17 | GTD | Anthony Mantella Nico Varrone Thomas Merrill Charlie Eastwood | AWA | Chevrolet Corvette Z06 GT3.R |
| 21 | GTD | Simon Mann Miguel Molina François Heriau Kei Cozzolino | AF Corse | Ferrari 296 GT3 |
| 023 | GTD | Alessio Rovera Onofrio Triarsi Ricky Agostini Charlie Scardina | Triarsi Competizione | Ferrari 296 GT3 |
| 27 | GTD | Zacharie Robichon Roman de Angelis Marco Sørensen Ian James | Heart of Racing Team | Aston Martin Vantage GT3 |
| 32 | GTD | Mike Skeen Mikaël Grenier Kenton Koch Maximillian Götz | Korthoff Preston Motorsports | Mercedes-AMG GT3 |
| 34 | GTD | Alessandro Balzan Cedric Sbirrazzuoli Manny Franco Albert Costa | Conquest Racing | Ferrari 296 GT3 |
| 43 | GTD | Jarett Andretti Gabby Chaves Scott Hargrove Thomas Preining | Andretti Motorsports | Porsche 911 GT3 R |
| 44 | GTD | John Potter Andy Lally Spencer Pumpelly Nicki Thiim | Magnus Racing | Aston Martin Vantage GT3 |
| 45 | GTD | Kyle Marcelli Danny Formal Graham Doyle Ashton Harrison | Wayne Taylor Racing with Andretti | Lamborghini Huracán GT3 EVO2 |
| 47 | GTD | Roberto Lacorte Giorgio Sernagiotto Antonio Fuoco Eddie Cheever III | Cetilar Racing | Ferrari 296 GT3 |
| 55 | GTD | Giammarco Levorato Corey Lewis Ryan Hardwick Dennis Olsen | Proton Competition | Ford Mustang GT3 |
| 57 | GTD | Russell Ward Philip Ellis Indy Dontje Daniel Morad | Winward Racing | Mercedes-AMG GT3 |
| 66 | GTD | Katherine Legge Sheena Monk Tatiana Calderón Stevan McAleer | Gradient Racing | Acura NSX GT3 Evo |
| 70 | GTD | Brendan Iribe Frederik Schandorff Ollie Millroy Tom Gamble | Inception Racing | McLaren 720S GT3 Evo |
| 78 | GTD | Misha Goikhberg Loris Spinelli Devlin DeFrancesco Sandy Mitchell | Forte Racing | Lamborghini Huracán GT3 EVO2 |
| 80 | GTD | Salih Yoluç Rui Andrade Scott Andrews Adam Christodolou | Lone Star Racing | Mercedes-AMG GT3 |
| 83 | GTD | Michelle Gatting Sarah Bovy Rahel Frey Doriane Pin | Iron Dames | Lamborghini Huracán GT3 EVO2 |
| 86 | GTD | Li Kerong Anders Fjørdbach Larry ten Voorde Klaus Bachler | MDK Motorsports | Porsche 911 GT3 R |
| 92 | GTD | David Brule Alec Udell Trent Hindman Julien Andlauer | KellyMoss with Riley | Porsche 911 GT3 R |
| 96 | GTD | Robby Foley Patrick Gallagher Jake Walker Jens Klingmann | Turner Motorsport | BMW M4 GT3 |
| 120 | GTD | Adam Adelson Elliott Skeer Jan Heylen Frédéric Makowiecki | Wright Motorsport | Porsche 911 GT3 R |
Feature image © Andrew “Skippy” Hall / DSC