| Name of Firm | Year(s) Attended Since 2020 |
| 3North | 2026 |
| Actual Size | 2020 |
| AE Works | 2020, 2021, 2022, 2023 |
| AE7 | 2022, 2023 |
| AECOM | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Alloy5 | 2024, 2025, 2026 |
| ARCO Design/Build Industrial | 2022 |
| Arcus Design Group | 2020, 2022, 2023 |
| Arentz Landscape Architects | 2020, 2022 |
| Arquitectonica | 2020 |
| Array Architects, Inc. | 2020 |
| Ayers Saint Gross | 2020, 2021, 2022, 2023, 2024, 2025 |
| Ballinger | 2021, 2022, 2023, 2024, 2025 |
| Barry Isett and Associates | 2024 |
| Bates Architects, LLC | 2020 |
| Belle & Wissell, Co. | 2020 |
| Bergmann | 2021 |
| Bernardon | 2020, 2021, 2022, 2023 |
| BLT Architects | 2021 |
| Bostwick Design Partnership | 2020 |
| Buchart Horn | 2023, 2024, 2025, 2026 |
| Buell Kratzer Powell (BKP) | 2020 |
| Campion Hruby Landscape Architects | 2020, 2021, 2022, 2023, 2025 |
| CannonDesign | 2020, 2021, 2023 |
| Charles Hess Landscape Architects | 2026 |
| Charles Hilton Architects | 2020, 2021, 2022, 2023, 2024, 2025 |
| christopher consultants | 2020, 2021 |
| CLR Design | 2020, 2023 |
| Colliers Engineering & Design | 2023, 2024, 2025, 2026 |
| Corgan | 2020, 2024, 2025, 2026 |
| Crabtree, Rohrbaugh & Associates | 2020 |
| CRB | 2023 |
| Dahlkemper Landscape Architects | 2023, 2024, 2025 |
| Dan Gordon Landscape Architects | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| DAVID RUBIN Land Collective | 2020, 2021, 2022, 2023, 2025 |
| DCA Landscape Architects, Inc. | 2023 |
| Derck & Edson | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Design Collective | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| DESIGN GROUP | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Design Republic | 2025, 2026 |
| Desmone | 2020, 2022, 2023, 2024, 2025, 2026 |
| Dewberry | 2020, 2021, 2022, 2023, 2024, 2026 |
| DLA+ Architecture & Interior Design | 2021, 2022, 2023, 2024, 2025, 2026 |
| DRAW Collective | 2024, 2025, 2026 |
| Dwell Design Studio | 2020, 2021, 2022, 2023, 2025, 2026 |
| Dwyer Architectural | 2025 |
| EDSA | 2020, 2021, 2022, 2023, 2026 |
| EI Associates, Architects & Engineers | 2024, 2025, 2026 |
| Environmental Planning and Design LLC | 2020 |
| Ewing Cole | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| EYP | 2020, 2021, 2022 |
| Fisher Architecture | 2023, 2024, 2025 |
| Fisher Associates | 2024 |
| FSI Architecture | 2022, 2023, 2024, 2026 |
| FVHD Architects-Planners | 2023 |
| Gannett Fleming | 2020, 2021, 2022, 2024 |
| Gateway Engineers | 2025, 2026 |
| Gensler | 2025 |
| GFT | 2026 |
| Glen Gate Company | 2020 |
| Gordon | 2026 |
| Gregory Lombardi Design | 2026 |
| Grimm + Parker Architects | 2023, 2024 |
| GroundLevel Landscape Architecture | 2024 |
| Grunley Construction Company | 2023, 2026 |
| GWWO Architects | 2024, 2025, 2026 |
| Hanbury | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Hart Howerton | 2020, 2023, 2024, 2025, 2026 |
| Hasenstab Architects | 2026 |
| Hayes Design Group | 2020, 2021, 2023 |
| HDG Architects | 2024, 2025, 2026 |
| HDR | 2023 |
| Herbert, Rowland & Grubic (HRG) | 2020, 2021, 2022, 2023, 2024, 2025 |
| Hess Landscape Architects | 2020, 2021, 2022, 2023, 2024, 2025 |
| HOK | 2020 |
| Hord Coplan Macht | 2020, 2026 |
| HRG | 2026 |
| Hughes Group Architects | 2023 |
| Hunt Engineers, Architects & Surveyors | 2020, 2023 |
| HYL Architecture | 2020, 2022, 2023, 2024 |
| IKM Architecture | 2020, 2021, 2022, 2023, 2024, 2025 |
| IPS-Integrated Project Services | 2024, 2025, 2026 |
| J Davis Architects | 2020 |
| J2 Engineers | 2020, 2022 |
| James Doyle Design Associates | 2020, 2022, 2023, 2024, 2025, 2026 |
| JKRP Architects | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| JL Architects | 2020 |
| JMT Architecture | 2020, 2021, 2022 |
| Jonathan Alderson Landscape Architects | 2020, 2021 |
| KCBA Architects | 2020, 2021, 2022, 2023 |
| KGD Architecture | 2020, 2021 |
| Kimley-Horn and Associates | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Kiser Vogrin Design | 2024, 2025 |
| Kiser Vogrin Design | 2025 |
| Kohn Pedersen Fox Associates (KPF) | 2023, 2024, 2025, 2026 |
| KSS Architects | 2020, 2022 |
| KTGY Architecture and Planning | 2020, 2021, 2022, 2023, 2024 |
| KW Landscape Architects | 2023 |
| LandDesign | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| LandStudies, Inc. | 2020 |
| Langan Engineering & Environ. Svcs. | 2025, 2026 |
| LaQuatra Bonci Associates | 2022 |
| Larson Design Group | 2020, 2024, 2025 |
| LBA Landscape Architecture | 2023 |
| LGA Partners | 2020, 2021, 2023, 2025, 2026 |
| LRK | 2020, 2021, 2022, 2025 |
| LS3P | 2023 |
| Mackin Engineering | 2024 |
| Mahan Rykiel Associates | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Marshall Craft Associates (MCA) | 2020, 2023, 2025, 2026 |
| Matthew Cunningham Landscape Design | 2025, 2026 |
| MCF Architecture | 2022 |
| McHale Landscape Design | 2021, 2022, 2023, 2024, 2026 |
| Melillo | Bauer | Carman | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| MESA Design Group | 2022, 2023, 2024, 2025, 2026 |
| MG2 Corporation | 2020, 2021, 2022, 2023, 2024, 2025 |
| MGA Partners Architects | 2022 |
| Michael Graves & Associates | 2023, 2024, 2025, 2026 |
| MKSD Architects | 2026 |
| Moseley Architects | 2022, 2023, 2024, 2025, 2026 |
| mossArchitects | 2023 |
| MV+A Architects | 2022, 2023 |
| Niles Bolton Associates | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| NK Architects | 2025, 2026 |
| Noelker and Hull Associates | 2022, 2023, 2025, 2026 |
| NORR | 2020, 2021, 2025 |
| Norris Design | 2022, 2023, 2024, 2025, 2026 |
| NUTEC | 2024, 2025 |
| NVR/Ryan Homes | 2025, 2026 |
| OLIN | 2020, 2021, 2022, 2023 |
| Page Southerland Page | 2024 |
| Pashek + MTR | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Payette Associates | 2021 |
| Pennoni | 2025, 2026 |
| Perkins & Will | 2022, 2023 |
| Perkins Eastman | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| PGAL | 2024, 2025, 2026 |
| Pickard Chilton | 2020, 2021, 2022, 2023, 2024, 2025 |
| Populous | 2020 |
| Precis Engineering + Architecture | 2024, 2025, 2026 |
| Quinn Evans Architects | 2023 |
| R3A Architecture | 2020 |
| Real Design Inc | 2020 |
| Reed Hilderbrand | 2021 |
| Rettew Associates | 2024, 2025, 2026 |
| RGS Associates | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| RLPS architects | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| RM Creative | 2023, 2024, 2025 |
| Rothschild Doyno Collaborative | 2023, 2025, 2026 |
| RVi Planning + Landscape Architecture | 2023, 2024, 2025, 2026 |
| Sasaki | 2020, 2022 |
| SCHRADERGROUP | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| SeamonWhiteside | 2026 |
| Silver Studio Architects | 2023, 2024 |
| Site Design Concepts | 2024, 2025, 2026 |
| Site Resources | 2020, 2021 |
| SLAM Collaborative | 2023, 2024, 2025, 2026 |
| SmithGroup | 2020 |
| SMMA | 2026 |
| Snøhetta | 2021 |
| Solomon Cordwell Buenz (SCB) | 2023 |
| Stantec | 2021, 2022, 2023, 2024, 2025, 2026 |
| Starr Whitehouse | 2024 |
| Strada Architecture LLC | 2023 |
| Studio 200 | 2020, 2021 |
| TBG Partners | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Terra Design Studios | 2020 |
| Terren Landscapes | 2025 |
| The Gateway Engineers, Inc. | 2024 |
| The M Group | 2020, 2021, 2022, 2023, 2026 |
| TranSystems | 2023 |
| Urban Design Associates | 2026 |
| V Squared Workshop | 2022, 2026 |
| Vocon | 2025 |
| WAREHAUS | 2020 |
| Ware Malcomb | 2026 |
| Webber/Smith Associates, Inc. | 2020 |
| Weber Murphy Fox | 2020, 2022 |
| Whiting-Turner Contracting Company | 2025 |
| Whitman, Requardt & Associates (WRA) | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| Wiley|Wilson | 2022 |
| Wilmot Sanz | 2020, 2021, 2022, 2023, 2025 |
| Wiss, Janney, Elstner Associates, Inc. | 2024 |
| Wood+Partners Inc. | 2021 |
| WRT | 2020, 2021, 2024, 2025, 2026 |
| Z+ Architects | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| ZGF Architects | 2020, 2024 |