William Chang

Westlake International Group Inc (Westlake International Group) is a private equity/venture capital firm founded in 1976. The firm is headquartered in Belmont, California.

USA Rugby is the national governing body for the sport of rugby in the United States. Established in 1975, it is a full sport member of the Olympic and Paralympic Committee and World Rugby. USA Rugby oversees the development of the game on all levels and has over 120,000 active members across the youth, high school, college, and senior club level. The organization is headquartered in Lafayette, Colorado, and hosts more than 30 national playoff and championship events each year. USA Rugby also oversees four national teams, multiple collegiate and high school all-American sides, and an emerging Olympic development pathway for elite athletes. In 2018, the organization hosted the Rugby World Cup Sevens in San Francisco, which broke various American records and acted as a launching point for the game's future growth.

The City Club of San Francisco, Inc. is a premier event destination located in San Francisco, CA. The City Club of San Francisco is an art deco jewel in the heart of downtown and is known for its elegance and style. The private company specializes in providing business convention venues, meeting spaces, and event planning services. The company offers a variety of spaces for weddings, rehearsal dinners, holiday parties, business events, galas, and fundraising events. The company also provides food and beverage services for meetings and events. The CEO of the company is William H. C. Chang.

Westlake Realty Group, Inc. provides real estate investment and development services. The private company is based in Belmont, CA and has subsidiaries in the United States. The CEOs are Kristina Chang, William H. C. Chang. The company was founded in 1972.

Digikey iH LLC builds digital and physical businesses. The American company was founded by William H. C. Chang.

PRS Medical Technologies, Inc. engages in the development, manufacture and commercialization of medical devices. Its devices are used to prevent and expedite treatment of pressure ulcers/sores, also known as decubitus ulcers. The firm’s products include purap clinical cushion, purap mattress system, oasis pain relief cushion, and oasis lumber support. The company was founded by George Y. Choi and Nikhil Bhat and is headquartered in Fremont, CA.