Duolingo

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-17 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Duolingo, Inc. (DUOL) CIK: 0001562088 --- Reporting Owner --- Name: Meese Robert CIK: 0001869668 Role: Officer (Chief Business Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-08-17 | Code: S (Open market sale) Shares: -1,354 | Price: $129.13 Total Value: $174,842.02 Shares Owned After: 169,391 | Ownership: D (Direct) Footnotes: [F1] Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of restricted stock units and delivery of shares. --- Holdings --- [Holding #1] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F2] Shares held by Eliot Meese Qualified Minor's Trust. [Holding #2] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F3] Shares held by Isaac Meese Qualified Minor's Trust. --- Footnotes (Complete Index) --- F1: Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of restricted stock units and delivery of shares. F2: Shares held by Eliot Meese Qualified Minor's Trust. F3: Shares held by Isaac Meese Qualified Minor's Trust. --- Signature --- /s/ /s/ Stephen Chen, as Attorney-in-Fact for Robert Meese (2026-08-19)