Top 20 Firms Ranked in 2015 Giants

Gensler, Ranked #1. Project: 888 Brannan. Location: San Francisco, CA. Photography by Gensler.

HOK, Ranked #2. Project: OpenText Toronto Executive Offices. Location: Toronto, Canada. Photography by Richard Johnson.

HBA/Hirsch Bedner Associates, Ranked #3. Project: Raffles Istanbul. Location: Istanbul, Turkey. Photography by Eric Laignel.

Perkins + Will, Ranked #4. Project: Newell Rubermaid. Location: Kalamazoo, MI. Photography by Tom Harris/Hedrich Blessing.

Jacobs, Ranked #5. Project: Cushman and Wakefield. Location: Philadelphia, PA. Photography by Jeff Totaro.

Stantec, Ranked #6. Project: 315 on A. Location: Boston, MA. Photography by Lucy Chen.

IA Interior Architects, Ranked #7. Project: LinkedIn. Location: Chicago, IL. Photography by Eric Laignel.

Callison, Ranked #8. Project: Dhamani. Location: Dubai, United Arab Emirates. Photography by Callison.

Nelson, Ranked #9. Project: Lobby renovation at 745 Atlantic Avenue. Location: Boston, MA. Photography courtesy of Nelson.

Leo A Daly, Ranked #10. Project: SAC Federal Credit Union Headquarters. Location: Omaha, NE. Photography by Leo A Daly.

Skidmore, Owings & Merrill, Ranked #11. Project: North Shore LIJ Katz Women’s Hospital and Zuckerberg Pavilion. Location: New Hyde Park, New York. Photography by Eduard Hueber.

HKS, Ranked #12. Project: Aiyuhua Women and Children's Hospital. Location: Beijing, China. Photography by Blake Marvin.

DB&B, Ranked #13. Project: DB&B Headquarters Office. Location: Singapore. Photography by DB&B.

Cannon Design, Ranked #14. Project: Follett, Inc. Location: Chicago, IL. Photography by Christopher Barrett.

NBBJ, Ranked #15. Project: Palo Alto Medical Foundation San Carlos Center. Location: San Carlos, CA. Photography by Sean Airhart/Bruce Damonte.

Perkins Eastman, Ranked #16. Project: The Quin. Location: New York, NY. Photography by Nikolas Koenig.

CCD/ChengChung Design (HK), Ranked #17. Project: St. Regis Hotel, Shenzhen, China. Photography by Louis Yu.

Wilson Associates, Ranked #19. Project: Sofitel Dubai Downtown. Location: Dubai, United Arab Emirates. Photography by Paul Robida.

AECOM, Ranked #18. Project: DirecTV. Location: El Segundo, CA. Photography by Grant Mudford.

M Moser Associates, Ranked #20. Project: LinkedIn. Location: New York, NY. Photography by Eric Laignel.