The calculations of earnings per share (shares in millions) are as follows: | | | | | | | | | | | | | | | | | | | Years Ended December 31 | 2025 | | 2024 | | 2023 | | Net Income Attributable to Merck & Co., Inc. | $ | 18,254 | | | $ | 17,117 | | | $ | 365 | | | Average common shares outstanding | 2,502 | | | 2,532 | | | 2,537 | | Common shares issuable (1) | 5 | | | 9 | | | 10 | | | Average common shares outstanding assuming dilution | 2,507 | | | 2,541 | | | 2,547 | | | Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders | $ | 7.30 | | | $ | 6.76 | | | $ | 0.14 | | | Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders | $ | 7.28 | | | $ | 6.74 | | | $ | 0.14 | |
(1) Issuable primarily under share-based compensation plans.
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