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Weighted Average Shares Outstanding | 9 Months Ended
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Sep. 30, 2024
Earnings Per Share [Abstract] |
WEIGHTED AVERAGE SHARES OUTSTANDING | NOTE J – WEIGHTED AVERAGE SHARES OUTSTANDING
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions) | 2024 |  | 2023 |  | 2024 |  | 2023
Weighted average shares outstanding — basic | 1,472.7 |  |  | 1,464.5 |  |  | 1,470.6 |  |  | 1,448.8 |
Net effect of common stock equivalents | 14.8 |  |  | 10.5 |  |  | 13.9 |  |  | 10.2 |
Weighted average shares outstanding - diluted | 1,487.4 |  |  | 1,475.0 |  |  | 1,484.5 |  |  | 1,459.1 |
The following securities were excluded from the calculation of weighted average shares outstanding - diluted because their effect in the periods presented below would have been antidilutive:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions) | 2024 |  | 2023 |  | 2024 |  | 2023
Stock options outstanding(1) | — |  | 0 |  | — |  | 0
MCPS(2) | — |  | — |  |  | — |  | 13
(1) Represents stock options outstanding pursuant to our employee stock-based compensation plans with exercise prices that were greater than the average fair market value of our common stock for the related periods. (2) Represents common stock issuable upon the conversion of MCPS. Refer to Note I – Stockholders' Equity for additional information. We base Net income (loss) per common share - diluted upon the weighted-average number of common shares and common stock equivalents outstanding during each year. Potential common stock equivalents are determined using the treasury stock method. We exclude stock options, stock awards and, prior to the Mandatory Conversion Date, our MCPS, from the calculation if the effect would be anti-dilutive. The dilutive effect of MCPS is calculated using the if-converted method. The if-converted method assumes that these securities were converted to shares of common stock at the beginning of the reporting period to the extent that the effect is dilutive. For the third quarter and first nine months of 2023, the effect of assuming the conversion of MCPS into shares of common stock was anti-dilutive, and therefore excluded from the calculation of earnings per share (EPS). Accordingly, Net income (loss) was reduced by cumulative Preferred stock dividends, as presented within our accompanying unaudited consolidated statements of operations, for purposes of calculating Net income attributable to Boston Scientific common stockholders. On June 1, 2023, all outstanding shares of MCPS automatically converted into shares of common stock. We issued approximately two million shares of our common stock in the third quarter of 2024, approximately eight million shares in the first nine months of 2024, approximately two million shares in the third quarter of 2023 and approximately 32 million shares in the first nine months of 2023. Shares were issued following the exercise of stock options, vesting of restricted stock units or purchases under our employee stock purchase plan and, specific to the first nine months of 2023, following the automatic conversion of the MCPS. We did not repurchase any shares of our common stock in the first nine months of 2024 or 2023. On December 14, 2020, our Board of Directors approved a stock repurchase program authorizing the repurchase of up to $1.000 billion of our common stock. As of September 30, 2024, we had the full amount remaining available under the authorization.

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