Duolingo

Item 2.02 Results of Operations and Financial Condition On August 5, 2026, Duolingo, Inc. (the Company ) issued a press release announcing the financial results of the Company for the six months ended June 30, 2026. A copy of the press release is being furnished as Exhibit 99.1 attached hereto and is incorporated by reference herein. In accordance with General Instruction B.2 of Form 8-K, the information in this ## XBRL Structured Facts - EntityCentralIndexKey: 0001562088 - AmendmentFlag: false - DocumentType: 8-K - DocumentPeriodEndDate: 2026-08-05 - EntityRegistrantName: Duolingo, Inc. - EntityIncorporationStateCountryCode: DE - EntityFileNumber: 001-40653 - EntityTaxIdentificationNumber: 45-3055872 - EntityAddressAddressLine1: 5900 Penn Avenue - EntityAddressCityOrTown: Pittsburgh - EntityAddressStateOrProvince: PA - EntityAddressPostalZipCode: 15206 - CityAreaCode: 412 - LocalPhoneNumber: 567-6602 - WrittenCommunications: false - SolicitingMaterial: false - PreCommencementTenderOffer: false - PreCommencementIssuerTenderOffer: false - Security12bTitle: Class A common stock, $0.0001 par value per share - TradingSymbol: DUOL - SecurityExchangeName: NASDAQ - EntityEmergingGrowthCompany: false

Item 9.01 Financial Statements and Exhibits (d) Exhibits. Exhibit No. Description 99.1 Press Release dated August 5, 2026 99.2 Shareholder Letter dated August 5, 2026 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. DUOLINGO, INC. Date: August 5, 2026 By: /s/ Gillian Munson Gillian Munson Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)