William O'Neil | |
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_in_2018.jpg) William O'Neil in 2018 | |
| Born | March 25, 1933 Oklahoma City, Oklahoma, U.S. |
| Died | May 28, 2023 (aged 90) |
| Education | Southern Methodist University |
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| Years active | 1958–2023 |
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William Joseph O'Neil (March 25, 1933 – May 28, 2023) was an American businessman, stockbroker and writer. He founded the stock brokerage firm William O'Neil & Co. Inc in 1963 and the business newspaper Investor's Business Daily in 1984. O'Neil was the author of the books How to Make Money in Stocks, 24 Essential Lessons for Investment Success and The Successful Investor among others, and is the creator of the CAN SLIM investment strategy.