Form 4 for Schlosser Mario filed 06/05/2026

SEC Form 4

FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549 OMB APPROVAL

Check this box if no longer subject to STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OMB Number: 3235-0287 Section 16. Form 4 or Form 5 Estimated average burden obligations may continue. See hours per response: 0.5 Instruction 1(b). Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5- 1(c). See Instruction 10.

1. Name and Address of Reporting Person*

2. Issuer Name and Ticker or Trading Symbol

3. Relationship of Reporting Person(s) to Issuer
   Duolingo, Inc. [ DUOL] (Check all applicable)
   Schlosser Mario Director 10% Owner Officer (give title Other (specify (Last) (First) (Middle)

4. Date of Earliest Transaction (Month/Day/Year) below) below) 06/03/2026
   C/O DUOLINGO, INC. 5900 PENN AVENUE

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)
   (Form filed by One Reporting Person
   Form filed by More than One Reporting Person)

(City) (State) (Zip)

Table I-Non-Derivative Securities