Largest Architecture Firms in the U.S.

Jul 9
5 min read

If your business sells into the commercial real estate industry, architecture firms can be some of your most valuable prospects. They specify materials, influence design decisions, and shape which products and services make it into a project. Biscred gives you the data to reach them: the asset classes each firm works across, its property count, estimated revenue, and the CRE contacts on file. To show what that looks like in practice, we took Architectural Record's ranking of the largest U.S. architecture firms and matched each one against our database (1):

1. Gensler

Headquarters: San Francisco
Industries: architecture, interior design
Number of asset classes: 17
Property count: 1,964
Estimated revenue: $1B+
Contacts in Biscred: 3,288

2. Perkins & Will

Headquarters: Chicago
Industries: architecture, interior design, landscape architecture
Number of asset classes: 12
Property count: Not available
Estimated revenue: Not available
Contacts in Biscred: 1,149

3. HKS

Headquarters: Dallas
Industries: architecture, interior design
Number of asset classes: 12
Property count: Not available
Estimated revenue: $100M to $1B
Contacts in Biscred: 1,086

4. Jacobs Solutions Inc

Headquarters: Dallas
Industries: Consulting, architecture, interior design, engineering, environmental consulting
Number of asset classes: 15
Property count: Not available
Estimated revenue: $1B
Contacts in Biscred: 1,527

5. HDR

Headquarters: Omaha
Industries: Engineering, architecture, landscape architecture, environmental consulting, construction and interior design
Number of asset classes: 19
Property count: Not available
Estimated revenue: $1B+
Contacts in Biscred: 3,861

6. AECOM

Headquarters: Dallas
Industries: general contractor, consulting, environmental consulting, interior design, engineering, architecture, developer
Number of asset classes: 20
Property count: Not available
Estimated revenue: $1B+
Contacts in Biscred: 7,823

7. Corgan

Headquarters: Amarillo
Industries: Architecture, interior design
Number of asset classes: 7
Property count: 259
Estimated revenue: $100M to $1B
Contacts in Biscred: 648

8. Populous

Headquarters: New York, New York
Industries: Architecture, interior design, landscape architecture
Number of asset classes: 3
Property count: 3,500
Estimated revenue: $100M to $1B
Contacts in Biscred: 434

9. Stantec Inc.

Headquarters: Edmonton, Alberta, Canada
Industries: Architecture, engineering, interior design, environmental consulting, landscape architecture
Number of asset classes: 17
Property count: Not available
Estimated revenue: $1B+
Contacts in Biscred: 2,430

10. HOK Architects

Headquarters: New York, New York
Industries: Architecture, landscaping, interior design, consulting
Number of asset classes: 12
Property count: 646
Estimated revenue: Not available
Contacts in Biscred: 801

How to Find Architecture Firms in Biscred

Because Biscred categorizes companies across multiple data points, firms can be ranked by the number of projects they've completed, their employee count, or the number of CRE contacts on file. Each view surfaces a different set of prospects.

Biscred’s database houses contact information for more than 664,000 companies and 5.7 million professionals working in commercial real estate.*

Here's how we built these lists. We started by setting Industries = Architect, which narrows the database to firms working in architecture.

From there, we layered on filters to rank those firms in different ways: company size by employee count, property count, and the number of contacts Biscred has on file for each firm. Each filter answers a different prospecting question. Company size points you toward the largest organizations. Property count signals how active a firm is across projects. Contact count tells you how many decision-makers and influencers you can reach inside each firm through Biscred.

Largest U.S. Architectural Firms by Size

We set Company Size = 10,000+ total employees. Firms listed may not have architecture as their primary service. Because all eight are estimated to employ more than 10,000 people, we present them alphabetically.

AECOM

Headquartered in Dallas, AECOM's services span a wide range of CRE-related industries beyond architecture: general contracting, environmental, design, engineering, development and more. AECOM's expertise reaches across asset classes too, checking boxes in 20 of Biscred's 24 CRE asset class designations, including multifamily, mixed use, office, healthcare, entertainment facilities, and government.

Burns & McDonnell

This construction, engineering and architecture firm is headquartered in Kansas City, Missouri. In the Biscred database, Burns & McDonnell lists experience in 16 of 24 CRE asset classes, including retail, education, hospitality, energy, industrial, healthcare, and mixed use.

Day & Zimmermann

Day & Zimmermann is a 100+ year-old company whose services include engineering and architecture, operations and management, staffing, and security for governments and corporations. They are headquartered in Philadelphia. Their asset classes are primarily government, industrial, and sustainable energy.

HDR

This Omaha, Nebraska-based engineering and architecture firm employs more than 14,000 people worldwide, according to the HDR About page (2). HDR operates in 19 of 24 Biscred-defined asset classes, including mixed use, government, industrial, healthcare, infrastructure and more.

Jacobs Solutions

Based in Dallas, this company describes itself as a global professional services company that provides end-to-end solutions, including design and engineering services. Jacobs also offers asset management, consulting, sustainability and other large-scale project services. According to Jacobs' home page, the company employs more than 45,000 people (3).

Mott MacDonald

Although it describes itself as an engineering, management and development company, Mott MacDonald's core industries include architecture. The firm has asset experience in 11 of Biscred's CRE asset classes: aviation, education, healthcare, office, retail, entertainment facilities, infrastructure, energy, sustainable energy, railroad, and government.

Ramboll Group

When Ramboll Group acquired Henning Larsen in 2019, it added architecture, landscape architecture and urbanism to its already broad list of services. The firm operates in multiple countries and its U.S. headquarters are in Arlington, Virginia. They specialize in healthcare, infrastructure, office, entertainment facilities, life sciences, energy, sustainable energy, aviation, railroad, industrial, government, data center, retail, mixed use, senior living, hospitality, and multifamily.

Stantec

Stantec is an engineering, architecture, and environmental consulting firm that employs approximately 34,000 people across 450 locations on six continents, according to the Stantec website. Their commercial asset classes include entertainment facilities, infrastructure, data center, energy, sustainable energy, railroad, multifamily, and land.

Largest Architectural Firms by Property Count

Biscred tracks a range of data points for each company, including property count, which is the estimated number of projects a firm has touched in some way. Many of these firms offer a range of services, so a high property count doesn't always mean the firm designed or engineered those buildings. What it does show is how much information Biscred holds on a single company. Here are the top 10 architecture firms by property count in Biscred's database:

Thornton Tomasetti: 90,000
Design, Consulting, Construction Management (DCCM): 50,000
Group-IPS: 25,000
A&S Engineering: 20,000
Allana Buick & Bers: 18,000
PBK: 18,000
Howard L. Zimmerman Architects & Engineers: 18,000
Architectural Graphic & Design Specialties: 12,000
Jacob & Martin: 11,346
Amtech Solutions: 10,000

Top Architect Companies by Contact Count

These firms employ thousands of people worldwide, but only a handful are worth your time. Biscred surfaces the contacts who actually shape CRE purchases and contracts: the decision-makers and the people who influence them. Here are the top 10 companies with the most of those contacts in Biscred:

AECOM: 7,823
HDR: 3,860
Gensler: 3,288
Parsons: 2,944
HNTB: 2,840
Stantec: 2,430
Kimley-Horn and Associates: 2,360
Terracon Consultants: 1,631
Jacobs Solutions: 1,527
Burns & McDonnell: 1,363

Find the Right Architect & Engineering Firms Faster

Architecture firms are some of the most valuable prospects for any business selling into commercial real estate, and they can be sorted in more ways than a single ranking suggests. The same set of firms looks different depending on whether you sort by revenue, employee count, property count, or the number of CRE contacts on file. Each view points you toward a different set of opportunities.

That flexibility is what Biscred was built on. The prospecting platform helps you move from a broad category like architecture down to the specific decision-makers and influencers you want to reach, filtered by asset class, geography, company size, and more.

See how it works for the prospects you're trying to reach. Schedule a demo to walk through Biscred with our team.

* As of June 30, 2026. Biscred continuously updates company, people and building data. Numbers cited on this page and throughout our site represent a snapshot in time, which is why you will see variations from page to page. It attests to how continuous we update our data.

Architectural Record, 2025 Top 300 Architecture Firms, accessed 2026-06-30
HDR Inc. About Us, accessed 2026-06-30
Jacobs, accessed 2026-06-30