Philip Arthur Fisher

Philip Arthur Fisher (September 8, 1907 – March 11, 2004) was an American stock investor best known as the author of Common Stocks and Uncommon Profits, a guide to investing that has remained in print ever since it was first published in 1958.

Philip Fisher's career began in 1928 when he dropped out of the newly created Stanford Graduate School of Business (later he would return to be one of only three people ever to teach the investment course) to work as a securities analyst with the Anglo-London Bank in San Francisco. He switched to a stock exchange firm for a short time before starting his own money management company, Fisher & Co., founded in 1931. He managed the company's affairs until his retirement in 1999 at the age of 91, and is reported to have made his clients extraordinary investment gains.

Although he began some fifty years before the name Silicon Valley became known, he specialized in innovative companies driven by research and development. He practiced long-term investing, and strove to buy great companies at reasonable prices. He was a very private person, giving few interviews, and was very selective about the clients he took on. He was not well-known to the public until he published his first book in 1958. At this point Fisher's popularity rose dramatically and propelled him to his now legendary status as a pioneer in the field of growth investing. Morningstar has called him "one of the great investors of all time". In Common Stocks and Uncommon Profits, Fisher said that the best time to sell a stock was "almost never". His most famous investment was his purchase of Motorola, a company he bought in 1955 when it was a radio manufacturer and held until his death.

Perhaps the best-known of Fisher's followers is Warren Buffett who has said on some occasions that "he is 85% Graham and 15% Fisher".

His son Kenneth L. Fisher also founded an investment firm.