Giants 400 Ranks Top Architecture Engineering Construction Firms
The 2025 Giants 400 Report, now in its 49th edition, ranks the largest architecture, engineering, and construction firms in the United States. More than 600 companies submitted data, reporting gross revenue from commercial, institutional, multifamily, and industrial construction work. It covers 25 building categories and specialty groups across six AEC disciplines: architecture, architecture/engineering, engineering, engineering/architecture, contractors, and construction management.
The final tally includes 137 individual rankings.
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The six discipline groups break down into Top 180 Architecture Firms, Top 100 Architecture/Engineering Firms, Top 80 Engineering Firms, Top 50 Engineering/Architecture Firms, Top 150 Contractors, and Top 80 Construction Management Firms. Each list is based on gross income figures supplied by the companies themselves, which are asked to verify the accuracy of their figures. Some industry observers note that self-reported data can vary in consistency, but the study remains a widely used benchmark for the industry.
Charts are further broken out by construction sector and specialty. Most categories include three separate lists: Top Architecture+AE Firms, Top Engineering+EA Firms, and Top Contractors+CM Firms. The groups for Design-Build Work and Telecommunications Buildings are exceptions — they offer only one list each. The approach also separates contractor income: the Contractors chart reflects projects where all income flows through the contractor, while the CM Agent + PM chart lists firms that derive income through fees alone.
The sector-specific lists are extensive.
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Healthcare facilities, for instance, have four subcategories: all healthcare work, hospitals, medical office buildings, and outpatient facilities. The top Healthcare market list includes 185 architecture and AE firms. Data centers get their own section, with Top 30 architecture firms, Top 80 engineering firms, and Top 60 contractors. Government work is sliced into federal civilian, local, state, military, and Veterans Administration groups, each with its own tables. Cultural facilities are broken into museums, performing arts venues, and public libraries. The multifamily segment covers apartments, senior living, and student housing. Office work is split between core-and-shell projects and workplace interior fitouts. K-12 schools, university facilities, sports stadiums, airport terminals, and convention centers all have dedicated charts. The study’s approach is what it is — companies are told to exclude income from non-building projects and single-family residential work, which keeps the focus on commercial and institutional construction.
Alongside the income charts, the study includes separate innovation reports from the nation’s largest architecture, engineering, and construction firms. These sections highlight what the biggest players are doing differently, though the source material does not detail specific innovations.
The individual rankings will be posted throughout late 2025 and early 2026.
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The full picture will emerge over several months rather than all at once.
For companies interested in the next cycle, the call for surveys for the 2026 Giants 400 Report opens March 2, 2026, and runs through May 8. Completed surveys are due by that date, and the editorial team provides an Excel form with instructions. But that’s next year’s story — for now, the 2025 information gives a snapshot of which firms are leading across dozens of project types, from airport terminals to student housing and everything in between.
