Kevin O'Leary has shared his stock portfolio, including a list of top picks, although the specific year of the picks is unclear, with some outlets referencing 2023 and others 2024. O'Leary has also discussed his investment philosophy, emphasizing the importance of cash flow, and has shared stories about investments that have been successful for him, including one tip from his son. Additionally, O'Leary has offered general advice on personal finance and investing, including the potential for living comfortably off interest alone with a sufficient amount of savings.