Weighted Average Diluted Shares Preferred Dividend to Retire June 1, 2023 Expected Dividend and Share Count P&L Impact: (in millions) BSX Dividend / Share Count Q4:22 FY:22 FY:23E ƚ Preferred Dividend $13.8 $55.3 1H: $23 / 2H: $0 Weighted Average Diluted Shares (excl. issuance) 1,413 1,410 Common Stock Issuance 29 29 Q2 2022 Highlights If price > $41.96, 23.98M shares convert MCPS Issuance (effective June 1, 2023) If price < $34.25, 29.38M shares convert If $34.25 < price < $41.96, then >23.98M but <29.38M shares convert Expected Weighted Average ƚƚƚ 1,442 1,440 Share conversion = $1,006.3M / share price Diluted Shares ƚ Five months paid of annual preferred dividend at 5.5% per annum per share. ƚƚ The dilutive effect of MCPS is calculated using the if-converted method. The method assumes that these securities are converted to shares of common stock upon maturity irrespective of stock movements or changes in the credit environment to the extent that the effect is dilutive. If the effect is anti-dilutive, we calculate Net income (loss) per common share by adjusting Net income (loss) in the numerator for the effect of the cumulative MCPS dividends for the respective period. ƚƚƚ st Price will be equal to the average volume-weighted average price “VWAP” per share of common stock over 20 consecutive trading days commencing on, and including, the 21 scheduled trading day immediately preceding June 1, 2023. On June 1, 2023, preferred shares mature; dividend is retired, and shares convert to common stock Prior to maturity, the dilutive effect of MCPS on EPS is calculated by taking the lower of: ƚƚƚƚ Adjusted Earnings Per Share Preferred Stock Dividends Adj Net Income – Preferred Dividends 10,062,500 $100 1/4 5.5% x x x preferred shares liquidation P&L dividend outstanding preference period Weighted Average Diluted Shares Outstanding $13.8M quarterly / $55.3M annually ƗƗƗƗ Expected WASO calculation excludes MCPS issuance because dividend is more dilutive than share conversion (“if-converted” method) 12 Q4 2022 Financial & Operational Highlights | February 1, 2023