HOK (formerly Hellmuth, Obata + Kassabaum) is an American worldwide design, architecture, engineering and urban planning firm.
HOK is the largest U.S.-based architecture-engineering firm and the second-largest interior design firm.
The HOK logo stands out in the architectural world with its unique design. It features a red square with lowercase letters arranged in a distinctive way at the top center. The “O” appears to float just above the “o,” giving the logo a playful and creative feel.