Duolingo 4: 116 RSUs in lieu of cash (Oct 13, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-10-10 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Duolingo, Inc. (DUOL) CIK: 0001562088 --- Reporting Owner --- Name: Schlosser Mario CIK: 0001844320 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-10-10 | Code: A (Grant or award) Shares: +116 | Price: $149.92 Total Value: $17,390.72 Shares Owned After: 4,378 | Ownership: D (Direct) Footnotes: [F1] Represents an award of fully vested restricted stock units ("RSUs") in lieu of cash retainers pursuant to reporting person's election under the Issuer's Amended and Restated Non-Employee Director Compensation Program (the "Plan"). Each RSU represents the right to receive one share of the Issuer's Class A Common Stock and will be settled either on a date selected by the reporting person pursuant to the Plan or as otherwise provided under the Plan. --- Footnotes (Complete Index) --- F1: Represents an award of fully vested restricted stock units ("RSUs") in lieu of cash retainers pursuant to reporting person's election under the Issuer's Amended and Restated Non-Employee Director Compensation Program (the "Plan"). Each RSU represents the right to receive one share of the Issuer's Class A Common Stock and will be settled either on a date selected by the reporting person pursuant to the Plan or as otherwise provided under the Plan. --- Signature --- /s/ /s/ Stephen Chen, as Attorney-in-Fact for Mario Schlosser (2026-10-13)