William Oberndorf

SPO Partners & Co. is an independent hedge fund manager headquartered in Mill Valley, California. The firm was co-founded in 1991 by John Scully, William “Bill” Oberndorf and William Patterson. SPO Partners offers investment advisory services only to a small number of investment entities.

Rosewood Hotels & Resorts LLC operates chain of hotels. The company operates hotels in several parts of the world including London, Dubai, New York, Chicago, Loa Angeles and Dallas. It was founded in 1979 and is located in Dallas, TX

Voyager Learning Co. is a publisher of solutions for the education, automotive and power equipment markets. It focuses on three market areas related to K-12 education, reading programs and resources, math and science programs and resources, and professional development programs. The company was founded in 1994 and is headquartered in Ann Arbor, MI.

The UCSF Foundation promotes and supports the interests and welfare of the University of California San Francisco and the UCSF Medical Center. The UCSF Foundation’s daily operations are administered by a development staff responsible for major gifts, planned giving, corporate and foundation gifts, annual giving, development communications, alumni relations and campus events

Calpine Corp. operates as power generation company, which engages in the ownership and operation of natural-gas fired and geothermal power plants. It sells power and related services to wholesale customers who include commercial and industrial end-users, state and regional wholesale market operators, and retail customers. The company was founded by Peter Cartwright in June 1984 and is headquartered in Houston, TX.

Aggregates USA LLC engages in the manufacture of construction aggregates. Its products include sand, gravel, limestone, and granite. The company was founded in 2010 and is headquartered in Mill Valley, CA.

Oberndorf Enterprises LLC is a private family office headquartered in San Francisco, California. The firm was founded by William Oberndorf and provides investment advice to a single family.