The computation of basic and diluted earnings per share attributable to common stockholders is as follows: | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | Nine Months Ended September 30, | | (In thousands, except per share data) | 2026 | | 2025 | 2026 | | 2025 | | | | Numerator: | | | | | | | | | | Net income attributable to Class A and Class B common stockholders | $ | 27,165 | | | $ | 292,195 | | $ | 103,783 | | | $ | 372,111 | | | | | | | | | | | | | | | | | | | | | | | Denominator: | | | | | | | | | | Weighted-average shares in computing net income per share attributable to Class A and Class B common stockholders, basic | 46,879 | | | 45,950 | | 46,789 | | | 45,572 | | | | | Effect of dilutive securities | | | | | | | | | | Founder Awards where performance has been met | — | | | 720 | | — | | | 720 | | | | | Dilutive effect of stock options outstanding (1) | 413 | | | 927 | | 413 | | | 927 | | | | | RSUs outstanding | 2,638 | | | 1,547 | | 2,638 | | | 1,547 | | | | | Denominator for dilutive net income per common share - weighted-average shares | 49,930 | | | 49,144 | | 49,840 | | | 48,766 | | | | | Basic income per common share | $ | 0.58 | | | $ | 6.36 | | $ | 2.22 | | | $ | 8.17 | | | | | Diluted income per common share | $ | 0.54 | | | $ | 5.95 | | $ | 2.08 | | | $ | 7.63 | | | |
______________(1) The Company had 0.5 million options outstanding as of September 30, 2026. The estimated dilutive effect is calculated as the number of shares expected to be issued upon vesting or exercise, adjusted for the strike price proceeds that are received by the Company and assumed to be used to repurchase shares of Duolingo common stock.
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