2021 Circuit of the Americas
Entry list
| Car # | Driver 1 | Team | Car | Class |
|---|---|---|---|---|
| 00 | Matt Dalton | Notlad Racing by RS1 | Aston Martin Vantage AMR GT4 | GT4 |
| 2 | Jason Bell | GMG Racing | Aston Martin Vantage AMR GT4 | GT4 |
| 04 | George Kurtz | DXDT Racing | Mercedes-AMG GT3 | SRO3 |
| 07 | Jason Golan | GMG Racing | Audi R8 LMS GT4 | GT4 |
| 8 | Elias Sabo | GMG Racing | Audi R8 LMS GT4 | GT4 |
| 14 | James Sofronas | GMG Racing | Lamborghini Huracan GT3 | SRO3 |
| 25 | Gray Newell | Heart of Racing Team | Aston Martin Vantage AMR GT4 | GT4 |
| 26 | Thomas Surgent | Prive Motorsports/ Topp Racing | McLaren 570S GT4 | GT4 |
| 27 | Jason Daskalos | Daskalos Motorsports | Audi R8 LMS | SRO3 |
| 32 | Kyle Washington | GMG Racing | Porsche 911 GT3 R (991.2) | SRO3 |
| 39 | Chris Cagnazzi | RENNtech Motorsports | Mercedes-AMG GT4 | GT4 |
| 45 | Charlie Luck | Wright Motorsports | Porsche 911 GT3 R (991.2) | SRO3-M |
| 54 | Tim Pappas | Black Swan Racing | Porsche 718 Cayman GT4 CLUBSPORT MR | GT4 |
| 58 | CJ Moses | DXDT Racing | Mercedes-AMG GT3 | SRO3 |
| 70 | Brendan Iribe | inception racing | McLaren 720S-GT3 | SRO3 |
| 76 | Alex Welch | ROTR Motorsport | Audi R8 LMS GT4 | GT4 |
| 88 | Jason Harward | Zelus Motorsports | Lamborghini Huracan GT3 | SRO3 |
| 89 | Ross Chouest | RENNtech Motorsports | Mercedes-AMG GT4 | GT4 |
| 99 | Robb Holland | Rotek Racing | Ford Mustang GT4 | GT4 |
| 119 | Sean Quinlan | Stephen Cameron Racing | BMW M4 GT4 | GT4 |
| 120 | Adam Adelson | Premier Racing | Porsche 718 Cayman GT4 CLUBSPORT MR | GT4 |
| 191 | Jeff Burton | Rearden Racing | Lamborghini Huracan GT3 | SRO3-M |
| 381 | Scott Schmidt | TPC Racing | Lamborghini Super Trofeo GT2 | INV |
| 460 | Andy Wilzoch | Flying Lizard Motorsports | Porsche 911 GT3 R (991) | SRO3-M |
| 619 | Alain Stad | Stephen Cameron Racing | Porsche 718 Cayman GT4 CLUBSPORT MR | GT4 |