Art Gensler founded the company in 1965. The company originally focused on corporate interiors, creating groundbreaking interiors for new office buildings. Since then, the architecture firm has diversified into many forms of architecture and design, including commercial office buildings, shopping malls, airports, educational institutions, entertainment complexes, planning and urban design, mission-critical facilities, consulting, brand design and other areas. The Gensler has grown rapidly. Gensler becomes an international design and architecture firm.

Art Gensler opened offices in the United States in the 1970s and 1980s and overseas offices in the 1980s and 1990s. The first overseas offices were opened in London in 1988 and new offices in Tokyo and Hong Kong in 1993. In 2002, Gensler opened an office in Shanghai and established a permanent presence in China.In 2021, Gensler had revenues of $1.235 billion, the highest of any US architectural firm. As of 2021, Gensler has offices in 49 cities in 16 countries worldwide, serving customers in more than 100 countries.

Services: Architecture, Brand Design, Consulting & Real Estate, Digital Experience Design, Interior, Design, Sustainability, Urban Strategies & Design

Founded: 1965

Headquarters: San Francisco, California

Revenue: $1,322,095,908(2020)

Website: https://www.gensler.com/

Perkins&Will is a global design practice founded in 1935. Since 1986, the group has been a subsidiary of Lebanon-based Dar Al-Hadassah. Phil Harrison has been the firm's CEO since 2006.

Perkins&Will designs buildings for schools, universities and hospitals, as well as for corporate and private clients. His projects range from office buildings and high-rise condos to hotels, convention centers, laboratories, and elementary schools. The company also provides interior design, branding, layout and urban design. The company's clients include Chicago O'Hare, New York University, Pfizer, and Time Warner. Perkins + Will has approximately 24 offices worldwide.

Services: architecture, interior design, branded environments, urban design, and landscape architecture.

Founded: 1935

Headquarters: Chicago, Illinois, USA

Revenue: $595,684,000(2020)

Website: http://perkinswill.com/

As one of the world's largest architectural firms, HKS has designed sports and entertainment, medical, hotel, industrial and corporate buildings in the United States and abroad. The company provides structural design, architecture, project management, interior and graphic design services.

HKS provides planning and development, programming, branding, research and consulting services. Some of the company's work includes the Benefield building, the Lopesan Costa Bavaro resort and village, Cambodia's first Laumes International Motor Racing Circuit, and the Biolab Research Center in Singapore.

Services: planning and development, programming, branding, research and consulting services.

Founded: 1939

Headquarters: Dallas, Texas, United States

Revenue:$430,053,922(2020)

Website:http://hksinc.com/

Perkins Eastman is a global architecture, interior design, urban design, planning, landscape, graphic design and project management firm. The company is headquartered in New York, USA and is led by founders Bradford Perkins and Mary Jean Eastman.

Perkins Eastman believes that design can have a positive and lasting impact on people's lives. With over 1,000 employees in 19 locations around the world, the company works seamlessly across boundaries, obstacles, and disciplines to bring people and ideas together.

Services: urban, interior, and sustainable design and planning services

Founded: 1981

Headquarters: New York City, United States

Revenue: $264,000,000(2020)

Website: http://www.perkinseastman.com/

ZGF Architects LLP (ZGF) (formerly Zimmer Gunsul Frasca Partnership) is a US-based architecture firm with offices in Portland, Oregon. Seattle, Washington; Los Angeles, California; Washington.; New York, New York; and Vancouver, Canada.

Founded in 1942, ZGF was ranked #4 Architectural Firm in the United States by Building Design + Construction and #9 Architectural Firm by Architect in 2011. In 2016, Architects named ZGF the number one architectural firm in the United States, citing the organization's commitment to sustainability as a key driver. There are more than 600 employees in five offices in the United States and one in Canada.

Services: Architectural, Engineering, and Related Services Industry

NBBJ accepted the Architecture 2030 challenge, a global initiative stating that all new buildings and major renovations reduce their fossil-fuel GHG-emitting consumption by 50 percent by 2010, incrementally increasing the reduction for new buildings to carbon neutral by 2030. In addition, the firm has been recognized by Engineering News-Record magazine as one of the greenest architecture firms in the United States.

Services: architecture, interior design, planning and urban design, branding, consulting, landscaping and lighting.

Founded: 1943
Headquarters: Seattle, Washington, U.S.
Revenue: $226,600,000 (2020)
Website: http://www.nbbj.com/

Kohn Pedersen Fox Associates (KPF) is one of the world's leading architectural firms providing architecture, interior design, programming and master planning services to clients in the public and private sectors.

KPF's philosophy is firmly grounded in the belief that success is the result of cooperation and dialogue. The KPF creative process emphasizes the open exchange of ideas within the company and more importantly between the client and the company throughout the entire project development process. This comparison process ensures that client needs and needs are addressed at all pivotal stages of the project. Ideas are sent for approval or rejection, as well as discussions where further questions arise and solutions are hoped to be found, each helping to create a more complete structure.

Services: master planning, urban design, space planning, programming, building analysis, graphic and product, and interior design.

Founded: 1976
Headquarters: New York City
Revenue: $219,700,000 (2020)
Website: http://www.kpf.com/

Corgan is a leading architecture and design firm with a decades-long reputation for great customer service. With the unwavering commitment to clients is the foundation of everything, decisions are client-oriented. That same commitment extends to the users of the places they create.

With expertise across six market sectors – aviation, commercial, data centers, education, healthcare, and interiors, Corgan’s strengths in research, user experience, and design allow us to foresee emerging changes and provide solutions that minimize risk, create flexibility, and maximize longevity.

Services: Architectural, Engineering, and Related Services Industry.

Founded: 1938
Headquarters:Dallas, TX, United States
Revenue: $200,830,474(2020)
Website: http://www.corgan.com/

Populous is a global architectural and design practice specializing in sports facilities, arenas, and convention centers, as well as the planning and design of major special events.

Founded through a management buyout in January 2009, Populous becomes independently owned and operated. It is estimated to be one of the largest architecture firms in the world. Populous formerly operated as HOK Sport Venue Event, which was part of the HOK Group.

Services: Sports, entertainment, events, conference and exhibition center architecture, Interior design,...

Founded: 1983
Headquarters: Kansas City, Missouri (US)
Revenue: $187,812,114(2020)
Website: https://populous.com/

FRCH Design Worldwide (currently FRCH Nelson) is an American-based architectural and design firm headquartered in Cincinnati, Ohio with regional offices in Los Angeles and New York City. Established in 1968, the company provided architectural, interior design, graphic design and brand strategy services to the retail, hospitality, restaurant and corporate office sectors.

In January 2018, it formally merged with NELSON Worldwide and has since rebranded its operations under the "FRCH Nelson" brand.

Services: architectural, interior design, graphic design and brand strategy services to the retail, hospitality, restaurant and corporate office sectors.

Founded: 1968
Headquarters: Cincinnati, Ohio, U.S.
Revenue: $164,575,615 (2020)
Website: http://www.frch.com/