Securities and Exchange Commission
Washington, D.C. 20549
Schedule 13G
(Rule 13d-102)
Information to be Included in Statements Filed Pursuant
to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed
Pursuant to § 240.13d-2


(Amendment No. )*

Duolingo, Inc.
(Name of Issuer)

Class A Common Stock
(Title of Class of Securities)
(CUSIP Number)
December 31, 2021
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
[        ]    Rule 13d-1(b)
[        ]    Rule 13d-1(c)
[    X    ]    Rule 13d-1(d)
* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 26603R106Schedule 13G
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Names of Reporting Persons

Luis von Ahn
2Check the Appropriate Box if a Member of a Group     (a) [ ]
     (b) [ ]
3SEC Use Only
Citizenship or Place of Organization

United States
Number of Shares Beneficially Owned by Each Reporting Person With5
Sole Voting Power
Shared Voting Power
Sole Dispositive Power
Shared Dispositive Power

Aggregate Amount Beneficially Owned by Each Reporting Person

Check if the Aggregate Amount in Row (9) Excludes Certain Shares

Not Applicable
Percent of Class Represented by Amount in Row 9

Type of Reporting Person



CUSIP No. 26603R106Schedule 13G
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ITEM 1.     (a)    Name of Issuer:
Duolingo, Inc. (the “Issuer”).
(b)    Address of Issuer’s Principal Executive Offices:

5900 Penn Avenue, Pittsburgh, Pennsylvania 15206
ITEM 2.     (a)    Name of Person Filing:
This statement is filed on behalf of Luis von Ahn (the “Reporting Person”).
(b)    Address or Principal Business Office:
The business address of the Reporting Person is c/o Duolingo, Inc., 5900 Penn Avenue, Pittsburgh, PA 15206.
(c)    Citizenship of each Reporting Person is:
The Reporting Person is a citizen of the United States.
(d)    Title of Class of Securities:
Class A Common Stock, par value $0.0001 per share (“Class A Common Stock”).
(e)    CUSIP Number:

ITEM 3.    
    Not applicable.


CUSIP No. 26603R106Schedule 13G
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ITEM 4.    Ownership.


The ownership information presented below represents beneficial ownership of Class A Common Stock of the Issuer as of December 31, 2021, based upon 15,796,838 shares of Class A Common Stock outstanding as of November 11, 2021, based on the Issuer’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 12, 2021.

Reporting Person
of class:
Sole power
 to vote or to
 direct the
Shared power
 to vote or to
 direct the vote:
Sole power to
 dispose or to
 direct the
power to
dispose or
to direct
Luis von Ahn3,951,45920.0%3,951,45903,951,4590

The Reporting Person is the beneficial owner of 3,951,459 shares of Class A Common Stock, which includes (i) 3,445,417 shares of Class A Common Stock underlying shares of Class B Common Stock held of record by the Reporting Person that are convertible at any time at the option of the holder into Class A Common Stock on a one-for-one basis and (ii) 506,042 shares of Class A Common Stock underlying stock options held of record by the Reporting Person that are exercisable prior to March 1, 2022.
ITEM 5.    Ownership of Five Percent or Less of a Class.
    Not applicable.
ITEM 6.    Ownership of More than Five Percent on Behalf of Another Person.
    Not applicable.
ITEM 7.    Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.
    Not applicable.
ITEM 8.    Identification and Classification of Members of the Group.
    Not applicable.
ITEM 9.    Notice of Dissolution of Group.
    Not applicable.
ITEM 10.     Certification.
Not applicable.


CUSIP No. 26603R106Schedule 13G
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After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date:    February 11, 2022

Luis von Ahn

/s/ Luis von Ahn