SEC Form 4

FORM 4		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 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Glance Natalie (Last) (First) (Middle) C/O DUOLINGO, INC. 5900 PENN AVENUE (Street) PITTSBURGH PA 15206 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Duolingo, Inc. [ DUOL ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) SVP, Engineering
	3. Date of Earliest Transaction (Month/Day/Year) 11/15/2021
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	11/15/2021		M		108	A	$0(1)	50,108	D
Class A Common Stock	11/15/2021		A		25,000(2)	A	$0	75,108(3)	D
Class A Common Stock	11/15/2021		S(4)		143	D	$138.0439(5)	74,965(3)	D
Class A Common Stock	11/15/2021		S(4)		116	D	$139.0086(6)	74,849(3)	D
Class A Common Stock	11/15/2021		S(4)		120	D	$140.1063(7)	74,729(3)	D
Class A Common Stock	11/15/2021		S(4)		63	D	$141.3591(8)	74,666(3)	D
Class A Common Stock	11/15/2021		S(4)		18	D	$141.8953(9)	74,648(3)	D
Class A Common Stock	11/15/2021		S(4)		29	D	$143.1101(10)	74,619(3)	D
Class A Common Stock	11/15/2021		S(4)		82	D	$145.3385(11)	74,537(3)	D
Class A Common Stock	11/15/2021		S(4)		428	D	$146.2107(12)	74,109(3)	D
Class A Common Stock	11/15/2021		S(4)		81	D	$146.8503(13)	74,028(3)	D
Class A Common Stock	11/15/2021		M		56,142	A	$2.23	130,170(3)	D
Class A Common Stock	11/15/2021		S(14)		5,102	D	$138.3045(15)	125,068(3)	D
Class A Common Stock	11/15/2021		S(14)		6,689	D	$139.2746(16)	118,379(3)	D
Class A Common Stock	11/15/2021		S(14)		7,525	D	$140.3031(17)	110,854(3)	D
Class A Common Stock	11/15/2021		S(14)		4,523	D	$141.3521(18)	106,331(3)	D
Class A Common Stock	11/15/2021		S(14)		800	D	$142.6668(19)	105,531(3)	D
Class A Common Stock	11/15/2021		S(14)		2,671	D	$143.5156(20)	102,860(3)	D
Class A Common Stock	11/15/2021		S(14)		2,200	D	$144.7163(21)	100,660(3)	D
Class A Common Stock	11/15/2021		S(14)		8,475	D	$145.7993(22)	92,185(3)	D
Class A Common Stock	11/15/2021		S(14)		13,809	D	$146.38(23)	78,376(3)	D
Class A Common Stock	11/15/2021		S(14)		2,648	D	$147.8434(24)	75,728(3)	D
Class A Common Stock	11/15/2021		S(14)		1,200	D	$148.5567(25)	74,528(3)	D
Class A Common Stock	11/15/2021		S(14)		300	D	$150.27(26)	74,228(3)	D
Class A Common Stock	11/15/2021		S(14)		200	D	$151.05	74,028(3)	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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
Restricted Stock Units	(1)	11/15/2021		M			108	(1)	(1)	Class A Common Stock	108	$0	0	D
Stock Option (Right to Buy)	$2.23	11/15/2021		M			56,142	(27)	02/27/2025	Class A Common Stock	56,142	$0	84,191	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock. 100% of the RSUs were immediately vested as of August 15, 2021 and settled on November 15, 2021.

2. Constitute RSUs for which the Reporting Person is entitled to receive one (1) share of Issuer's Class A Common Stock for each RSU upon vesting. 1/16th of the RSUs shall vest on each quarterly anniversary of May 15, 2021. On November 15, 2021, 3,125 RSUs vested.

3. Includes 21,875 RSUs.

4. Shares were sold solely to satisfy tax withholding obligations in connection with the vesting of RSUs and delivery of shares.

5. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $137.48 to $138.46, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

6. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $138.585 to $139.57, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

7. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $139.66 to $140.52, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

8. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $140.77 to $141.76, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

9. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $141.83 to $141.96, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

10. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $142.90 to $143.42, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

11. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $144.69 to $145.60, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

12. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $145.72 to $146.70, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

13. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $146.72 to $147.21, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

14. The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan.

15. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $137.86 to $138.85, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

16. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $138.86 to $139.82, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

17. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $139.91 to $140.82, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

18. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $140.96 to $141.95, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

19. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $141.96 to $142.94, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

20. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $142.97 to $143.85, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

21. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $144.07 to $145.05, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

22. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $145.10 to $146.09, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

23. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $146.10 to $147.05, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

24. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $147.14 to $148.13, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

25. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $148.29 to $149.15, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

26. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $150.04 to $150.72, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

27. 25% of the shares subject to the option vest on the first anniversary measured from February 27, 2015 (the "Vesting Commencement Date"), and 1/48th of the total number of shares vest monthly thereafter, such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date.

Remarks:

	/s/ Stephen Chen, as Attorney-in-Fact for Natalie Glance	11/17/2021
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

POWER OF ATTORNEY
    With respect to holdings of and transactions in securities issued by Duolingo, Inc. (the "Company"), the undersigned hereby constitutes and appoints the individuals named on Schedule A attached hereto and as may be amended from time to time, or any of them signing singly, with full power of substitution and resubstitution, to act as the undersigned's true and lawful attorney-in-fact to:
1.    prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the United States Securities and Exchange Commission (the "SEC") a Form ID, including amendments thereto, and any other documents necessary or appropriate to obtain and/or regenerate codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act of 1934, as amended, or any rule or regulation of the SEC;
2.    execute for and on behalf of the undersigned, Forms 3, 4, and 5 in accordance with Section 16 of the Securities Exchange Act of 1934, as amended, and the rules thereunder;
3.    do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5, complete and execute any amendment or amendments thereto, and timely file such form with the SEC and any stock exchange or similar authority; and
4.    take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-facts discretion.
The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution and resubstitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorneys-in-fact substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted.
The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is any Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934, as amended.
This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.
    IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 15th day of April, 2021.

                        By: /s/ Natalie Glance
                        Name: Natalie Glance

Schedule A

Individuals Appointed as Attorney-in-Fact with Full Power of Substitution and Resubstitution

1. Luis von Ahn
2. Stephen Chen
3. Matt Skaruppa