| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Chen Stephen C. | General Counsel | C/O DUOLINGO, INC., 5900 PENN AVENUE, PITTSBURGH | /s/ Stephen C. Chen | 18 Aug 2025 | 0001869758 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | DUOL | Class A Common Stock | Sale | -$422K | -1.28K | -3.62% | $329.03 | 34.2K | 15 Aug 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs") and delivery of shares. |