expanded in 1995 by merging with the British architectural practice Cecil Denny Highton. As of April 2021, HOK operates offices in seven different countries including the US, China, India, and Canada, where it established its first offices in 1997 with the acquisition of Urbana Architects. The firm expanded into China in 2013, when it acquired the New York and Shanghai offices of hospitality design firm BBG-BBGM, creating one of the world's largest interior design firms, although BBG-BBGM's office in Washington, D.C. continues to operate as BBGM. By 2007, international work represented more than 40% of HOK's annual revenue. Other domestic acquisitions include Caudill Rowlett Scott based in Houston, Texas, in November 1994, adding offices in Houston and Atlanta, and 360 Architecture in January 2015, a 200-person, Kansas City-based firm specializing in the design of stadiums, ballparks, arenas, recreation and wellness centers, and mixed-use entertainment districts. The acquisition enabled HOK to launch a new global Sports, Recreation, and Entertainment design practice after the breakaway of Populous, and to open new offices in Kansas City and Columbus, Ohio. This return to the firm's tradition of stadium architecture was buoyed on May 15, 2015, when the firm announced a multi-year partnership with the United Soccer League (USL) in the US to lead a stadium development, design and standards initiative to help house all USL clubs in soccer-specific stadiums across North America by the end of the decade. Leadership In 2004, George Hellmuth's nephew, Bill Hellmuth, was named president of the firm. In 2012, HOK Chairman Bill Valentine retired after 50 years with the firm and was replaced by HOK Chief Executive Officer Patrick MacLeamy, FAIA. In January 2016, HOK announced that Bill Hellmuth would succeed Patrick MacLeamy as CEO, effective April 19, 2016, and he would later also assume the role of chairman when it was announced that Carl Galioto had been appointed president in April 2017. Innovation and sustainable design In 1983, HOK introduced HOK Draw, computer-aided drafting software products that specialized in conceptual architectural design. In the early 2000s, HOK began using Building Information Modeling (BIM) to streamline the design and construction process. In 2012, Building Design + Construction ranked HOK the No. 1 BIM Architecture Firm. In 2013, DesignIntelligence magazine, based in part on the firm's leadership in buildingSMART and BIM, ranked HOK the No. 1 Design Firm for Technology Expertise. HOK is generally regarded as one of the leading