## Shelton James H

| Name and Address of Reporting Person*  | Issuer Name and Ticker or Trading Symbol   | Relationship of Reporting Person(s) to Issuer (Check all applicable) |
|-----------------------------------------|---------------------------------------------|---------------------------------------------------------------|
| C/O DUOLINGO, INC.<br>5900 PENN AVENUE<br>PITTSBURGH PA 15206 | Duolingo, Inc. [ DUOL ] | X Director 10% Owner <br> Officer (give title below) Other (specify below) |
|                                         | Date of Earliest Transaction (Month/Day/Year) <br>2026-06-03 | |
|                                         | Individual or Joint/Group Filing (Check Applicable Line)<br>X Form filed by One Reporting Person<br> Form filed by More than One Reporting Person |

## nonderivative securities

| Non-Derivative Securities                                           |                         |                    |                 |                      |                      |                                 |                  |                                 |                            |                              |
|--------------------------------------------------------------------|-------------------------|--------------------|-----------------|----------------------|----------------------|---------------------------------|------------------|---------------------------------|----------------------------|------------------------------|
| Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned |                         |                    |                 |                      |                      |                                 |                  |                                 |                            |                              |
| 1. Title of Security | 2. Transaction Date <br>(Month/Day/Year) | 2A. Deemed Execution Date, if any <br>(Month/Day/Year) | 3. Transaction Code | | 4. Securities Acquired (A) or Disposed Of (D) | | | 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) | 6. Ownership Form: Direct (D) or Indirect (I) | 7. Nature of Indirect Beneficial Ownership |
|----------------------|------------------------------------------|----------------------------------------|-----------------|----------------|----------------|-----------------|--------------------|-----------------------------|----------------|---------------------------|
| Class A Common Stock  | 06/03/2026                           |                                        | A               |                 | 2,001 (1)      | A               | 0                  | 11633                    | D              |                          |

## derivative securities

| Derivative Securities |                         |                    |                 |                      |                      |                                 |                  |                                 |                            |                              |                         |                         |                         |                         |
|----------------------|-------------------------|--------------------|-----------------|----------------------|----------------------|---------------------------------|------------------|---------------------------------|----------------------------|------------------------------|-------------------------|-------------------------|-------------------------|-------------------------|
| Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned <br> (e.g., puts, calls, warrants, options, convertible securities) | | | | | | | | | | | | | | | |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price of Derivative Security | 3. Transaction Date <br>(Month/Day/Year) | 3A. Deemed Execution Date, if any <br>(Month/Day/Year) | 4. Transaction Code | | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | | 6. Date Exercisable and Expiration Date <br>(Month/Day/Year) | | 7. Title and Amount of Securities Underlying Derivative Security | | 8. Price of Derivative Security | 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) | 10. Ownership Form: Direct (D) or Indirect (I) | 11. Nature of Indirect Beneficial Ownership |
|----------------------|--------------------------------|------------------------------|------------------------------------------------|-----------------------|-------------------------|--------------------------------|----------------------------|--------------------------|------------------|--------------------------|-------------------------|----------------|--------------------------|--------------------|--------------------|
|                      |                                |                              |                                                |                       |                         |                                |                            |                          |                  |                          |                         |                |                          |                    |                    |