- Raimund Abraham
- Archi-Tectonics (Winka Dubbledam)
- Arquitectonica
- Associated Architects
- Carrère and Hastings
- Cesar Pelli & Associates Architects
- Cetra/Ruddy
- Clinton & Russell
- Cook + Fox Architects, LLP
- Costas Kondylis & Associates
- Davis Brody Bond, LLP
- Der Scutt Architects
- Edward Durell Stone & Associates
- Emery Roth
- Emery Roth & Sons
- Foster + Partners (Lord Norman Foster)
- FXFowle Architects (formerly Fox & Fowle)
- Gehry Partners (Frank Gehry)
- Gensler
- Cass Gilbert
- Greenberg Farrow Architects
- Gruzen Samton LLC (formerly Gruzen Samton Steinglass / Gruzen Partnership)
- Gwathmey Siegel and Associates (Charles Gwathmey)
- H. Craig Severance
- Handel Architects (Gary Handel)
- Heins & LaFarge
- Helmle, Corbett and Harrison
- Henry J. Hardenbergh
- Herzog & de Meuron
- HLW International
- HOK (formerly Hellmuth, Obata + Kassabaum)
- Raymond Hood
- Hood, Godley & Fouilhoux
- Hood & Howells
- John Mead Howells
- Howells & Stokes
- Kohn Pedersen Fox Associates (KPF)
- Maki and Associates (Fumihiko Maki)
- McKim, Mead and White
- Michael Graves & Associates
- Murphy/Jahn
- Pei Cobb Freed & Partners (I.M. Pei, Henry Cobb)
- Pelli Clarke Pelli
- Perkins Eastman PC
- Perkins & Will
- Philip Birnbaum & Associates
- Polshek Partnership
- Populous (formerly HOK Sport)
- James Renwick, Jr.
- Renzo Piano Building Workshop
- Richard Meier & Partners
- Richard Rogers Partnership
- Rockwell Group
- Santiago Calatrava
- Schwartz & Gross
- H. Craig Severance and William van Alen
- SHoP Architects (Sharples Holden Pasquarelli)
- Shreve & Lamb
- Shreve, Lamb, and Harmon
- Oscar I. Silverstone
- Skidmore, Owings & Merrill (SOM)
- SLCE Architects (Schuman, Lichtenstein, Claman & Efron)
- Snohetta
- Stephen B. Jacobs Group
- Robert A.M. Stern
- Swanke Hayden Connell Architects
- TEN Arquitectos
- Tsao & McKown Architects
- Richard Upjohn & Son (Richard Upjohn and Richard M. Upjohn)
- William Van Alen
- Warren and Wetmore
- Frank Lloyd Wright
- Yamasaki & Associates (Minoru Yamasaki)
- York and Sawyer
Stubbins Associates
- Citigroup Center (1977)
Irwin Clavan
H. Thomas O’Hara
Website: hto-architect.com
