| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| DUOL | SVP, Engineering | May 16, 2022 | Sale | $90.97 | 472 | 42,938 | 132,510 | May 18, 2022, 05:18 PM |
| DUOL | SVP, Engineering | Feb 15, 2022 | Sale | $98.02 | 543 | 53,223 | 98,038 | Feb 24, 2022, 05:41 PM |
| DUOL | SVP, Engineering | Feb 15, 2022 | Sale | $98.01 | 543 | 53,221 | 97,575 | Feb 17, 2022, 07:21 PM |
| DUOL | SVP, Engineering | Nov 23, 2021 | Option Exercise | $2.23 | 1,000 | 2,230 | 99,028 | Nov 24, 2021, 01:29 PM |
| DUOL | SVP, Engineering | Nov 22, 2021 | Option Exercise | $2.23 | 24,000 | 53,520 | 98,028 | Nov 24, 2021, 01:29 PM |
| DUOL | SVP, Engineering | Nov 16, 2021 | Option Exercise | $4.87 | 19,458 | 94,808 | 93,486 | Nov 18, 2021, 03:58 PM |
| DUOL | SVP, Engineering | Nov 16, 2021 | Sale | $138.75 | 19,458 | 2,699,789 | 90,721 | Nov 18, 2021, 03:58 PM |
| DUOL | SVP, Engineering | Nov 15, 2021 | Option Exercise | $2.23 | 56,142 | 125,197 | 130,170 | Nov 17, 2021, 04:50 PM |
| DUOL | SVP, Engineering | Nov 15, 2021 | Sale | $143.39 | 57,222 | 8,204,931 | 125,068 | Nov 17, 2021, 04:50 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| DUOL | SVP, Engineering | May 16, 2022 | Sale | 42,938 |
| DUOL | SVP, Engineering | Feb 15, 2022 | Sale | 53,223 |
| DUOL | SVP, Engineering | Feb 15, 2022 | Sale | 53,221 |
| DUOL | SVP, Engineering | Nov 23, 2021 | Option Exercise | 2,230 |
| DUOL | SVP, Engineering | Nov 22, 2021 | Option Exercise | 53,520 |
| DUOL | SVP, Engineering | Nov 16, 2021 | Option Exercise | 94,808 |
| DUOL | SVP, Engineering | Nov 16, 2021 | Sale | 2,699,789 |
| DUOL | SVP, Engineering | Nov 15, 2021 | Option Exercise | 125,197 |
| DUOL | SVP, Engineering | Nov 15, 2021 | Sale | 8,204,931 |