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Duolingo, Inc.

For the period ended Sep 30, 2026. Filed Nov 4, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Nov 4, 2026

DUOL$154.25-3.8%Stored close · as of Nov 9, 2026

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Item 5. Other Information

(a) None.

(b) None.

(c) Trading Plans

On September 4, 2026, Natalie Glance, Chief Engineering Officer, entered into a 10b5-1 sales plan (the “Glance 10b5-1 Sales Plan”) intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act, providing for (i) the sale of the net number of shares of Class A common stock underlying 19,283 unvested restricted stock units received after giving effect to the number of shares automatically sold to satisfy tax withholding obligations on each applicable vesting date (such total number of shares covered under clause (i) is not determinable) and (ii) the sale of 16,866 shares of Class A common stock. The Glance 10b5-1 Sales Plan will remain in effect until the earlier of (1)December 31, 2027, (2) the date on which all trades set forth in the Glance 10b5-1 Sales Plan have been executed, or (3) such time as the Glance 10b5-1 Sales Plan is otherwise terminated according to its terms.

No other “officer” (as defined in Rule 16a-1(f) under the Exchange Act) or director of the Company adopted, modified orterminated “Rule 10b5-1 trading arrangements” and/or “non-Rule 10b5-1 trading arrangements” (each as defined in Item 408 of Regulation S-K) during the three months ended September 30, 2026.

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