PRIMECAP Management Company (PMC) was founded in September 1983 in Pasadena, California, as an independent investment management company. PMC is the investment advisor for each of the three PRIMECAP Odyssey Funds. The firm also manages equity portfolios for a limited number of institutional clients, including most notably the Vanguard Group. PMC is a long-only, equity-only investment management company that strives for excellent long-term returns by adhering to four key principles: 1) commitment to fundamental research; 2) maintenance of a long-term investment horizon; 3) emphasis on individual decision-making; and, 4) focus on value.