Sec Form 4 Filing - Durable Capital Partners LP @ Duolingo, Inc. - 2023-10-23

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Durable Capital Partners LP 2. Issuer Name and Ticker or Trading Symbol Duolingo, Inc. [ DUOL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 4747 BETHESDA AVENUE #1002 3. Date of Earliest Transaction (MM/DD/YY) 10/23/2023 (Street) BETHESDA, MD20814 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 10/23/2023 S 16,188 D $ 159.63 3,788,135 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 12,351 D $ 161.54 3,775,784 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 3,167 D $ 161.76 3,772,617 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 8,929 D $ 161.05 3,763,688 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 8,734 D $ 159.45 3,754,954 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 2,488 D $ 159.14 3,752,466 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 15,000 D $ 159.08 3,737,466 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 614 D $ 161.13 3,736,852 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 652 D $ 160.23 3,736,200 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 512 D $ 159.33 3,735,688 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 1,000 D $ 159.08 3,734,688 I See footnote 1 ( 1 ) Class A Common Stock 10/24/2023 S 1,000 D $ 159.04 3,733,688 I See footnote 1 ( 1 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Durable Capital Partners LP 4747 BETHESDA AVENUE #1002 BETHESDA, MD20814 X Signatures Durable Capital Partners LPBy: Julie Jack, its Authorized Person 10/25/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The securities are held directly by Durable Capital Master Fund LP ("Durable Capital Master Fund"). Durable Capital Partners LP ("Durable Capital") acts as the investment adviser to Durable Capital Master Fund and has sole voting power and sole investment power over the securities reported on this Form 4. Durable Capital Partners GP LLC ("Durable GP") is the general partner of Durable Capital, and Henry Ellenbogen is the chief investment officer of Durable Capital and the managing member of Durable GP. Each of Durable Capital Master Fund, Durable Capital, Durable GP and Mr. Ellenbogen disclaim beneficial ownership of the reported securities, except to the extent of any pecuniary interest therein.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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