William J. O'Neil is a renowned American entrepreneur, stockbroker, and author who revolutionized stock market analysis. Born in 1933, O'Neil founded the investment firm William O'Neil & Co. Inc. in 1963 and launched the influential business newspaper Investor's Business Daily in 1984. He is best known for developing the CAN SLIM investment strategy, a data-driven approach to identifying high-potential stocks. O'Neil's bestselling book, "How to Make Money in Stocks," has helped millions of investors worldwide improve their trading strategies. As a pioneer in computerized stock analysis, he created one of the first comprehensive stock databases, which he used to study historical market trends. O'Neil's innovative methods earned him a seat on the New York Stock Exchange at the young age of 30. Throughout his career, he has remained committed to educating investors, authoring several books and funding academic initiatives in business and journalism at Southern Methodist University, his alma mater. O'Neil's contributions to the financial world have made him a respected figure in investment circles and a mentor to countless aspiring traders.