Note 9—Earnings Per Share

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Basic earnings per common share (“EPS”) is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of common shares outstanding. Diluted EPS is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of outstanding common shares, including dilutive common shares, the dilutive effect of which relates to stock options. The following is a reconciliation of the basic weighted average common shares outstanding to diluted weighted average common shares outstanding, which were used to calculate the earnings per share (basic and diluted) for the three and nine months ended September 30, 2026 and 2025:

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Excluded from the computation above were anti-dilutive common shares (primarily related to outstanding stock options) of 12.7 million and 10.6 million for the three months ended September 30, 2026 and 2025, respectively, and 6.4 million and 14.6 million for the nine months ended September 30, 2026 and 2025, respectively.