PRIMECAP Management Company

PRIMECAP Management Company is an independent investment management company founded in 1983 in Pasadena, CA . The firm manages US-focused equity portfolios for a limited number of institutions and mutual funds . PRIMECAP's investment approach is based on four key principles: individual decision-making, commitment to fundamental research, long-term investment horizon, and focus on value . The firm seeks to provide superior long-term equity investment results and to satisfy the specific requirements and objectives of its clients . PRIMECAP views itself as stock pickers, not marketers and has limited the number of clients it services, enabling it to focus on portfolio management rather than marketing and administration .