2025 Giants 400 Report: Ranking the nation's largest architecture, engineering, and construction firms

Welcome to the 49th edition of Building Design+Construction’s Giants 400 Report. More than 600 architecture, engineering, and construction firms submitted data for the 2025 Giants 400 Report. The report ranks the nation's largest AEC firms based on gross revenue across 25 building sectors and specialty categories and six AEC disciplines (architecture firms, architecture/engineering firms, engineering firms, engineering/architecture firms, contractors, and construction management firms). 

The final report includes 137 rankings in all. The individual rankings will be posted throughout September, October, and November 2025 (see the posting schedule below). 

Data for BD+C's Giants 400 charts is based on information supplied by the respective firms. Firms are asked to verify the accuracy of their data. The Construction section includes two types of statistics. The Contractors chart reflects revenues for general contracting, design-build, CM at risk, and IPD—projects where all revenues flow through the contractor.

Firms were asked to report gross revenue from commercial, institutional, multifamily, and industrial “buildings” work completed by their U.S./Canada-based staff/studios/divisions/teams. They were asked to exclude revenue from non-buildings work or from single-family residential work.

CALL FOR SURVEYS: 2026 GIANTS 400 REPORT
If you would like to participate in the 2026 Giants 400 firm rankings, please send an email to David Barista, BD+C Editorial Director, at [email protected]. The "call for surveys" period will begin March 2, 2026, and conclude May 29, 2026. The BD+C editorial team will email a link to download the Excel survey form, with instructions, on March 2. Completed surveys will be due May 29. 

The CM Agent + PM chart lists firms that derive their revenues through fees. In the subsequent market-specific sections (Healthcare, Data Centers, etc.) data labeled “Construction” includes all delivery methods combined (GC, DB, CM at risk, IPD, CM agent, PM).

All building sector categories except for 08 and 23 include multiple rankings for the sector: Top Architecture+AE Firms; Top Engineering+EA Firms; and Top Contractors+CM Firms.

Here is the revised 2025 Giants 400 posting schedule:

• September 5:
  • Architecture Firms
  • Architecture/Engineering Firms
  • Engineering Firms
  • Engineering/Architecture Firms
  • Contractors
  • Construction Management Firms
• September 12:
  • Higher Education
  • Data Centers
  • Multifamily
  • Sports
• September 19:
  • Hotel
  • Airport Terminals
  • Healthcare
  • Industrial
• October 3:
  • K-12 Schools
  • Office Buildings
  • Retail
  • Parking
• October 17:
  • Government
  • Justice Facilities
  • Reconstruction
• October 31:
  • Cultural Facilities
  • Integrated Project Delivery
• November 14:
  • Design-Build
  • Science+Technology
  • Telecommunications
• November 28:
  • Convention Centers
  • Religious Facilities
  • Transit Buildings
• December 5:
  • PDF download with all 137 Giants 400 rankings.

2025 GIANTS 400 REPORT - TOP ARCHITECTURE FIRMS, ENGINEERING FIRMS, AND CONSTRUCTION COMPANIES

A. Top Architecture Firms  
B. Top Architecture/Engineering (AE) Firms  
C. Top Engineering Firms  
D. Top Engineering/Architecture (EA) Firms  
E. Top Contractors                  
F. Top Construction Management Firms

2025 GIANTS 400 REPORT - TOP ARCHITECTURE FIRMS, ENGINEERING FIRMS, AND CONSTRUCTION COMPANIES BY BUILDING SECTOR AND SPECIALTY RANKINGS        

Note: All categories below except for 08 and 23 include multiple rankings for the sector: Top Architecture+AE Firms; Top Engineering+EA Firms; and Top Contractors+CM Firms.

01. Airport Terminals  
• Top Airport Terminal Architecture and AE Firms  
• Top Airport Terminal Engineering and EA Firms  
• Top Airport Terminal Contractors and CM Firms  

02. Convention Centers/Conference Centers  
• Top Convention Center Architecture + AE Firms 
• Top Convention Center Engineering + EA Firms  
• Top Convention Center Contractors + CM Firms

03. Cultural Facilities – All Cultural Facilities Work     
• Top Cultural Facilities Architecture and AE Firms – All Cultural Facilities Work  
• Top Cultural Facilities Engineering and EA Firms – All Cultural Facilities Work  
• Top Cultural Facilities Contractors and CM Firms – All Cultural Facilities Work 

04. Cultural Facilities – Museums and Galleries  
• Top Cultural Facilities Architecture and AE Firms – Museums and Galleries  
• Top Cultural Facilities Engineering and EA Firms – Museums and Galleries  
• Top Cultural Facilities Contractors and CM Firms – Museums and Galleries

05. Cultural Facilities – Performing Arts and Concert Venues  
• Top Cultural Facilities Architecture and AE Firms – Performing Arts and Concert Venues  
• Top Cultural Facilities Engineering and EA Firms – Performing Arts and Concert Venues  
• Top Cultural Facilities Contractors and CM Firms – Performing Arts and Concert Venues

06. Cultural Facilities – Public Libraries  
• Top Cultural Facilities Architecture and AE Firms – Public Libraries  
• Top Cultural Facilities Engineering and EA Firms – Public Libraries  
• Top Cultural Facilities Contractors and CM Firms – Public Libraries

07. Data Centers          
• Top Data Center Sector Architecture and AE Firms  
• Top Data Center Sector Engineering and EA Firms  
• Top Data Center Sector Contractors and CM Firms

08. Design-Build Work  
• Top Design-Build Construction Firms

09. Government - All Government Buildings Work  
• Top Government Sector Architecture + AE Firms - All Government Work  
• Top Government Sector Engineering + EA Firms - All Government Work  
• Top Government Sector Contractors + CM Firms - All Government Work

10. Government - Federal Civilian Government  
• Top Federal Government Architecture + AE Firms   
• Top Federal Government Engineering + EA Firms   
• Top Federal Government Contractors + CM Firms 

11. Government - Local Government Buildings  
• Top Local Government Architecture + AE Firms   
• Top Local Government Engineering + EA Firms   
• Top Local Government Contractors + CM Firms 

12. Government - State Government Buildings  
• Top State Government Architecture + AE Firms   
• Top State Government Engineering + EA Firms   
• Top State Government Contractors + CM Firms

13. Government - Military  
• Top Military Facility Architecture + AE Firms   
• Top Military Facility Engineering + EA Firms   
• Top Military Facility Contractors + CM Firms 

14. Government - Veterans Administration Facilities  
• Top Veterans Affairs (VA) Facility Architecture + AE Firms   
• Top Veterans Affairs (VA) Facility Engineering + EA Firms   
• Top Veterans Affairs (VA) Facility Contractors + CM Firms

15. Healthcare – All Healthcare Facilities Work  
• Top Healthcare Sector Architecture and AE Firms  
• Top Healthcare Sector Engineering and EA Firms  
• Top Healthcare Sector Contractors and CM Firms       

16. Healthcare – Hospitals  
• Top Hospital Facility Architecture and AE Firms  
• Top Hospital Facility Engineering and EA Firms  
• Top Hospital Facility Contractors and CM Firms 

17. Healthcare – Medical Office Buildings, Dental Offices  
• Top Medical Office Building Architecture and AE Firms  
• Top Medical Office Building Engineering and EA Firms  
• Top Medical Office Building Contractors and CM Firms

18. Healthcare – Outpatient Facilities   
• Top Outpatient Facility Architecture and AE Firms  
• Top Outpatient Facility Engineering and EA Firms  
• Top Outpatient Facility Contractors and CM Firms

19. Hospitality – All Hospitality Facilities Work (Hotels, Resorts, Casinos)  
• Top Hospitality Facility Sector Architecture and AE Firms  
• Top Hospitality Facility Engineering and EA Firms  
• Top Hospitality Facility Contractors and CM Firms

20. Hospitality — Hotel, Resorts  
• Top Hotel Sector Architecture and AE Firms 
• Top Hotel and Resort Engineering and EA Firms  
• Top Hotel and Resort Contractors and CM Firms

21. Hospitality — Casinos  
• Top Casino Architecture and AE Firms  
• Top Casino Engineering and EA Firms  
• Top Casino Contractors and CM Firms  

22. Industrial Buildings — Manufacturing Plants, Warehouses  
• Top Industrial Facility Architecture and AE Firms  
• Top Industrial Facility Engineering and EA Firms  
• Top Industrial Facility Contractors and CM Firms  
         
23. Integrated Project Delivery (IPD)  
• Top Integrated Project Delivery (IPD) Construction Firms

24. Multifamily — All Multifamily Facilities Work  
Top Multifamily Sector Architecture and AE Firms — All Multifamily Facilities Work  
Top Multifamily Sector Engineering and EA Firms — All Multifamily Facilities Work  
Top Multifamily Sector Contractors and CM Firms — All Multifamily Facilities Work

25. Multifamily — Apartments, Condominiums  
Top Multifamily Sector Architecture and AE Firms — Apartments, Condominiums Work  
Top Multifamily Sector Engineering and EA Firms — Apartments, Condominiums Work  
Top Multifamily Sector Contractors and CM Firms — Apartments, Condominiums Work

26. Multifamily — Senior Living Facilities  
Top Multifamily Sector Architecture and AE Firms — Senior Living Facilities  
Top Multifamily Sector Engineering and EA Firms — Senior Living Facilities  
Top Multifamily Sector Contractors and CM Firms — Senior Living Facilities

27. Multifamily — Student Housing Facilities  
Top Multifamily Sector Architecture and AE Firms — Student Housing Facilities  
Top Multifamily Sector Engineering and EA Firms — Student Housing Facilities  
Top Multifamily Sector Contractors and CM Firms — Student Housing Facilities

28. Office — All Office Building Work                  
• Top Office Sector Architecture and AE Firms  
• Top Office Sector Engineering and EA Firms  
• Top Office Sector Contractors and CM Firms

29. Office — Buildings/Core+Shell   
• Top Office Building Core+Shell Architecture + AE Firms   
• Top Office Building Core+Shell Engineering + EA Firms  
• Top Office Building Core+Shell Contractors and CM Firms

30. Office — Workplace/Interior Fitouts   
• Top Workplace/Interior Fitout Architecture and AE Firms  
• Top Workplace/Interior Fitout Engineering and EA Firms  
• Top Workplace/Interior Fitout Contractors and CM Firms

31. Parking Structures  
• Top Parking Structure Architecture and AE Firms   
• Top Parking Structure Engineering and EA Firms  
• Top Parking Structure Contractors + CM Firms 

32. Public Safety/Justice Facilities  
• Top Justice Facility/Public Safety Sector Architecture and AE Firms  
• Top Justice Facility/Public Safety Sector Engineering and EA Firms  
• Top Justice Facility/Public Safety Contractors + CM Firms

33. Reconstruction Work  
• Top Reconstruction Sector Architecture and AE Firms  
• Top Reconstruction Sector Engineering and EA Firms  
• Top Reconstruction Sector Contractors + CM Firms

34. Religious Structures/Places of Worship  
• Top Religious Facility Architecture and AE Firms  
• Top Religious Facility Engineering and EA Firms  
• Top Religious Facility Contractors + CM Firms  

35. Retail — All Retail Buildings Work                 
• Top Retail Sector Architecture and AE Firms — All Retail Buildings Work  
• Top Retail Sector Engineering and EA Firms — All Retail Buildings Work  
• Top Retail Sector Contractors and CM Firms — All Retail Buildings Work

36. Retail — Entertainment Centers, Cineplexes, Theme Parks  
• Top Retail Architecture and AE Firms — Entertainment Centers, Cineplexes, Theme Parks  
• Top Retail Engineering and EA Firms — Entertainment Centers, Cineplexes, Theme Parks  
• Top Retail Contractors and CM Firms — Entertainment Centers, Cineplexes, Theme Parks

37. Retail — Malls, Big Box Stores, Strip Centers  
• Top Retail Architecture and AE Firms - Malls, Big Box Stores, Strip Centers  
• Top Retail Engineering and EA Firms — Malls, Big Box Stores, Strip Centers  
• Top Retail Contractors and CM Firms — Malls, Big Box Stores, Strip Centers

38. Retail — Restaurants  
• Top Retail Architecture and AE Firms — Restaurants  
• Top Retail Engineering and EA Firms — Restaurants  
• Top Retail Contractors and CM Firms — Restaurants

39. Science & Technology (S+T) Facilities - All S+T Buildings Work  
• Top Science + Technology Facility Architecture and AE Firms  
• Top Science + Technology Facility Engineering and EA Firms  
• Top Science + Technology Facility Contractors and CM Firms  
            
40. Science & Technology — Laboratories  
• Top Laboratory Facility Architecture and AE Firms  
• Top Laboratory Facility Engineering and EA Firms  
• Top Laboratory Facility Contractors and CM Firms              

41. Schools — PK-12, Public, Private, Charter, Military  
• Top K-12 School Sector Architecture and AE Firms  
• Top K-12 School Sector Engineering and EA Firms  
• Top K-12 School Sector Contractors and CM Firms

42. Sports Facilities/Stadiums/Recreation Facilities   
• Top Sports Facility Architecture and AE Firms  
• Top Sports Facility Engineering and EA Firms  
• Top Sports Facility Contractors and CM Firms      

43. Telecommunications Buildings  
• Top Telecommunications Facility Sector Architecture and AE Firms  
• Top Telecommunications Facility Sector Engineering and EA Firms  
• Top Telecommunications Facilities Contractors + CM Firms

44. Transit Facilities — Bus/Rail Terminals and Stations  
• Top Transit Facility Architecture and AE Firms  
• Top Transit Facility Engineering and EA Firms  
• Top Transit Facilities Contractors + CM Firms

45. University / College Facilities   
• Top University Sector Architecture and AE Firms  
• Top University Sector Engineering and EA Firms  
• Top University Sector Contractors and CM Firms

PAST GIANTS 400 REPORTS

2024 Giants 400 Report
2023 Giants 400 Report
2022 Giants 400 Report 
2021 Giants 400 Report  
2020 Giants 400 Report