Portman Holdings is a privately held real estate investment and development firm founded in 1953 by architect John Portman. The company focuses on creating mixed-use, office, hospitality, residential, retail, and industrial projects. Headquartered in Atlanta, the firm has maintained a longstanding presence in urban development and has expanded into diverse U.S. markets over time. Its approach integrates planning, design, and management functions to support projects across multiple property types. Portman’s history includes notable milestones, such as contributing to large-scale developments and pursuing new suburban redevelopment initiatives. The organization continues to operate as a private entity, managing a broad portfolio that includes mixed-use environments and adaptive reuse projects.