duol-20250425

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )


Filed by the Registrant ☒						Filed by a Party other than the Registrant ☐


Check the appropriate box:

☐			Preliminary Proxy Statement

☐			Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☒			Definitive Proxy Statement

☐			Definitive Additional Materials

☐			Soliciting Material under § 240.14a-12

Duolingo, Inc.

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Duolingo, Inc.

5900 Penn Avenue

Pittsburgh, Pennsylvania 15206

April 25, 2025

Dear Fellow Stockholders:

On behalf of the Board of Directors, I cordially invite you to attend the 2025 annual meeting of stockholders (the “Annual Meeting”) of Duolingo, Inc., which will be held on Wednesday, June 11, 2025, beginning at 11:30 a.m., Eastern Time. The Annual Meeting will be a completely virtual meeting, which will be conducted via live webcast.

In accordance with the Securities and Exchange Commission rules allowing companies to furnish proxy materials to their stockholders over the Internet, we have sent stockholders of record as of the close of business on April 15, 2025 a Notice of Internet Availability of Proxy Materials. The notice contains instructions on how to access our Proxy Statement and Annual Report and vote online. If you would like to receive a printed copy of our proxy materials from us instead of downloading a printable version from the Internet, please follow the instructions for requesting such materials included in the notice, as well as in the attached Proxy Statement.

Attached to this letter are a Notice of Annual Meeting of Stockholders and Proxy Statement, which describe the business to be conducted at the Annual Meeting.

Your vote is important to us. Please act as soon as possible to vote your shares. It is important that your shares be represented at the meeting whether or not you plan to attend the Annual Meeting via the Internet. Please vote electronically over the Internet, by telephone or, if you receive a paper copy of the proxy card by mail, by returning your signed proxy card in the envelope provided. You may also vote your shares online during the Annual Meeting. Instructions on how to vote while participating at the meeting live via the Internet are posted at www.virtualshareholdermeeting.com/DUOL2025.

On behalf of the Board of Directors and management, it is my pleasure to express our appreciation for your continued support.



Luis von Ahn
Co-Founder, Chief Executive Officer and Chairman of the Board

Notice of Annual Meeting of Stockholders

To be held on June 11, 2025

Notice is hereby given that the Annual Meeting of Stockholders of Duolingo, Inc., a Delaware corporation, will be held on Wednesday, June 11, 2025, at 11:30 a.m., Eastern Time.

The Annual Meeting will be a completely virtual meeting, which will be conducted via live webcast. You will be able to attend the Annual Meeting online and submit your questions during the meeting by visiting www.virtualshareholdermeeting.com/DUOL2025 and entering your 16-digit control number included on your Notice of Internet Availability of Proxy Materials or your proxy card.

For instructions on how to attend and vote your shares at the Annual Meeting, see the information in the accompanying Proxy Statement in the section titled “General Information about the Annual Meeting and Voting—How can I attend and vote at the Annual Meeting?”

The Annual Meeting is being held:


			To elect Bing Gordon, John Lilly and Mario Schlosser as Class I directors to hold office until the Company’s annual meeting of stockholders to be held in 2028 and until their respective successors have been duly elected and qualified;
			To ratify the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025;
			To approve, on an advisory (non-binding) basis, the compensation of our named executive officers; and
			To transact such other business as may properly come before the Annual Meeting or any continuation, postponement or adjournment thereof.

These items of business are described in the Proxy Statement that follows this notice. Holders of record of our common stock, composed of Class A common stock and Class B common stock, as of the close of business on April 15, 2025 are entitled to notice of and to vote at the Annual Meeting, or any continuation, postponement or adjournment thereof.

Your vote is important. Voting your shares will ensure the presence of a quorum at the Annual Meeting and will save us the expense of further solicitation.

This Notice of Annual Meeting and Proxy Statement are first being distributed or made available, as the case may be, on or about April 25, 2025.

Please promptly vote your shares by following the instructions for voting on the Notice Regarding the Availability of Proxy Materials or, if you received a paper or electronic copy of our proxy materials, by completing, signing, dating and returning your proxy card or by Internet or telephone voting as described on your proxy card.

By Order of the Board of Directors,




			Luis von Ahn Co-Founder, Chief Executive Officer and Chairman of the Board

Important Notice Regarding the Availability of Proxy Materials for the Annual Stockholder Meeting: Our Proxy Statement and our Annual Report are available free of charge at www.proxyvote.com.


DUOLINGO 2025 PROXY STATEMENT						i

TABLE OF CONTENTS


			Page
GENERAL INFORMATION ABOUT THE ANNUAL MEETING AND VOTING			2

When and where will the Annual Meeting be held?			2
What are the purposes of the Annual Meeting?			2
Are there any matters to be voted on at the Annual Meeting that are not included in this Proxy Statement?			2
How do I vote my shares without attending the Annual Meeting?			3
How many votes are required to approve each proposal?			3
Why did I receive a notice in the mail regarding the Internet availability of proxy materials instead of a paper copy of proxy materials?			4
What does it mean if I receive more than one Notice and Access Card or more than one set of proxy materials?			4
Can I vote my shares by filling out and returning the Notice and Access Card?			5
Who is entitled to vote at the Annual Meeting?			5
What is the difference between being a “record holder” and holding shares in “street name”?			5
What do I do if my shares are held in “street name”?			5
How many shares must be present to hold the Annual Meeting?			5
What are “broker non-votes”?			6
What if a quorum is not present at the Annual Meeting?			6
How can I attend and vote at the Annual Meeting?			6
Will there be a question and answer session during the Annual Meeting?			6
What if during the check-in time or during the Annual Meeting I have technical difficulties or trouble accessing the virtual meeting website?			7
How does the Board recommend that I vote?			7
What if I do not specify how my shares are to be voted?			7
Who will count the votes?			8
Can I revoke or change my vote after I submit my proxy?			8
Who will pay for the cost of this proxy solicitation?			8
Where can I find the results of the Annual Meeting?			8
Why hold a virtual meeting?			8
PROPOSAL NO. 1 ELECTION OF DIRECTORS			9

Board Size and Structure			9
Nominees for Director			9
Information About Board Nominees and Continuing Directors			10
Nominees for Election to a Three-Year Term Expiring at the 2028 Annual Meeting of Stockholders			11
Class II Directors Whose Term Expire at the 2026 Annual Meeting of Stockholders			12
Class III Directors Whose Term Expire at the 2027 Annual Meeting of Stockholders			14
Board Recommendation			15
PROPOSAL NO. 2 RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM			16

Appointment of Independent Registered Public Accounting Firm			16
Audit, Audit-Related, Tax and All Other Fees			16
Audit Fees			16
Audit-Related Fees			16
Tax Fees			17
All Other Fees			17
Pre-Approval Policies and Procedures			17
Board Recommendation			17


Audit Committee Report			17
PROPOSAL NO. 3 APPROVAL, ON AN ADVISORY (NON-BINDING) BASIS, OF THE COMPENSATION OF OUR NAMED EXECUTIVE OFFICERS (“SAY-ON-PAY” VOTE)			19

Say-on-Pay			19
Board Recommendation			19
EXECUTIVE OFFICERS			20

CORPORATE GOVERNANCE			22

Corporate Governance Guidelines			22
Board Leadership Structure			22
Director Independence			22
Board Committees			23
Audit Committee			23
Compensation Committee			24
Compensation Consultants			25
Nominating and Corporate Governance Committee			25
Mergers and Acquisitions Committee			26
Board and Board Committee Meetings and Attendance			26
Executive Sessions			26
Director Attendance at Annual Meeting of Stockholders			27
Director Nominations Process			27
Board Role in Risk Oversight			28
Committee Charters and Corporate Governance Guidelines			28
Code of Business Conduct and Ethics			28
Insider Trading Compliance Policy			29
Anti-Hedging Policy			29
Communications with the Board			29
Board Composition			30
CORPORATE RESPONSIBILITY AND IMPACT			30
COMPENSATION DISCUSSION AND ANALYSIS			33

Executive Summary			33
Business Content			33
Compensation Highlights			33
Compensation Philosophy and Objectives			34
Executive Compensation Practices			35
Compensation Determination Process			36
Role of the Compensation Committee			36
Role of Executive Officers			36
Role of the Compensation Consultant			37
Use of Market Data			37
2024 Compensation Elements & Decisions			38
Base Salary			38
Long-Term Equity Incentive Awards			39
Special Multi-Year Performance-Based Founder Awards			40
Other Compensation Practices and Policies			42
Retirement Savings and Health and Welfare Benefits			42


Perquisites and Other Personal Benefits			42
Employment Arrangements			42
Change in Control and Severance Benefits			43
Compensation Recovery Policy			43
Practices Related to the Timing of Grants of Certain Equity Awards			43
Accounting and Tax Considerations			43
Accounting Considerations			43
Tax Considerations			43
Compensation Committee Report			44
Executive Compensation Tables			45
2024 Summary Compensation Table			45
Grants of 2024 Plan-Based Awards			45
Outstanding Equity Awards at 2024 Year End			46
Option Exercises and Stock Vested			48
Nonqualified Deferred Compensation for Fiscal Year 2024			48
Potential Payments Upon Termination or Change in Control			49
C EO Pay Ratio			50
Compensation Risk Assessment			51
Director Compensation			51
Non-Employee Director Compensation Policy for Fiscal Year 2024			52
EQUITY COMPENSATION PLAN INFORMATION			55

PAY VERSUS PERFORMANCE			55
Pay Versus Performance Table			56
Pay Versus Performance Total Stockholder Return Chart			58
Pay Versus Performance Net (Loss) Income Chart			59
Pay Versus Performance Bookings Chart			60
STOCK OWNERSHIP			61

Security Ownership of Certain Beneficial Owners and Management			61
Delinquent Section 16(a) Reports			64
CERTAIN TRANSACTIONS WITH RELATED PERSONS			65

Policies and Procedures on Transactions with Related Persons			65
Indemnification Agreements			65
STOCKHOLDER PROPOSALS AND DIRECTOR NOMINATIONS			66

HOUSEHOLDING			67

2024 ANNUAL REPORT			68

Forward-Looking Statements

This proxy statement (this “Proxy Statement”) contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements contained in this Proxy Statement that do not relate to matters of historical fact should be considered forward-looking statements, including, without limitation, statements regarding our business model and growth strategy and our corporate responsibility and impact initiatives. Without limiting the generality of the foregoing, you can identify forward-looking statements because they contain words such as “may,” “will,” “shall,” “should,” “expects,” “plans,” “anticipates,” “could,” “intends,” “target,” “projects,” “contemplates,” “believes,” “estimates,” “predicts,” “potential,” “goal,” “objective,” “seeks,” or “continue” or the negative of these words or other similar terms or expressions that concern our expectations, strategy, plans, or intentions. Such forward-looking statements are neither promises nor guarantees, but involve a number of known and unknown risks, uncertainties and assumptions that may cause our actual results, performance or achievements to differ materially from those expressed or implied in the forward-looking statements due to various factors, including, but not limited to the important factors more fully detailed under the caption "Risk Factors" in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, as any such factors may be updated from time to time in our periodic reports filed with the SEC, which are accessible on the SEC’s website at www.sec.gov and the Investor Relations section of the Company’s website at investors.duolingo.com. All forward-looking statements speak only as of the date of this Proxy Statement. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change.

Additionally, our discussion of certain environmental, social and governance and related corporate responsibility (“ESG”) matters in this or other disclosures, including our corporate website (which information contained on or available through our corporate website is not incorporated by reference into, and should not be considered to be a part of, this Proxy Statement) is informed by various ESG standards and frameworks (including standards for the measurement of underlying data) and the interests of various stakeholders. As such, such information may not, and should not be interpreted as necessarily being, “material” under the federal securities laws for SEC reporting purposes. ESG standards use varying definitions of materiality that may differ from, and are often more expansive than, the definition under federal securities laws. Furthermore, much of this ESG information is subject to methodologies or third-party information that is still evolving and subject to change.

Duolingo, Inc.

5900 Penn Avenue

Pittsburgh, Pennsylvania 15206

PROXY STATEMENT

FOR THE ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD ON JUNE 11, 2025

This proxy statement (the “Proxy Statement”) and our annual report for the fiscal year ended December 31, 2024 (the “Annual Report” and, together with this Proxy Statement, the “proxy materials”) are being furnished by and on behalf of the board of directors (the “Board” or “Board of Directors”) of Duolingo, Inc. (the “Company,” “Duolingo,” “we,” “us,” or “our”), in connection with our 2025 annual meeting of stockholders (the “Annual Meeting”). The Notice of Annual Meeting and this Proxy Statement are first being distributed or made available, as the case may be, to stockholders on or about April 25, 2025.

General Information About the Annual Meeting and Voting

Meeting Information:

Date: Wednesday, June 11, 2025

Time: 11:30 am

Location: Virtual-only

When and where will the Annual Meeting be held?

The Annual Meeting will be held on Wednesday, June 11, 2025 at 11:30 a.m., Eastern Time. The Annual Meeting will be a completely virtual meeting, which will be conducted via live webcast. You will be able to attend the Annual Meeting online and submit your questions during the meeting by visiting www.virtualshareholdermeeting.com/DUOL2025 and entering your 16-digit control number included in your Notice of Internet Availability of Proxy Materials, on your proxy card or on the instructions that accompanied your proxy materials. If you lose your 16-digit control number, you may join the Annual Meeting as a “Guest” but you will not be able to vote or ask questions.

What are the purposes of the Annual Meeting?

The purpose of the Annual Meeting is to vote on the following items described in this Proxy Statement:

•Proposal No. 1: Election of the three director nominees listed in this Proxy Statement.

•Proposal No. 2: Ratification of the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025.

•Proposal No. 3: Approval, on an advisory (non-binding) basis, of the compensation of our named executive officers (“Say-on-Pay” Vote).

Are there any matters to be voted on at the Annual Meeting that are not included in this Proxy Statement?

At the date this Proxy Statement went to press, we did not know of any matters to be properly presented at the Annual Meeting other than those referred to in this Proxy Statement. If other matters are properly presented at the meeting or any adjournment or postponement thereof for consideration, and you are a stockholder of record and have submitted a proxy card, the persons named in your proxy card will have the discretion to vote on those matters for you.


DUOLINGO 2025 PROXY STATEMENT						2

How do I vote my shares without attending the Annual Meeting?

We recommend that stockholders vote by proxy even if they plan to attend the Annual Meeting and vote electronically. If you are a stockholder of record, there are three ways to vote by proxy:

By Internet:

You can vote over the Internet at www.proxyvote.com by following the instructions on the Notice and Access Card or proxy card;

By Telephone:

You can vote by telephone by calling 1-800-690-6903 and following the instructions on the proxy card; or

By Mail:

You can vote by mail by signing, dating and mailing the proxy card, which you may have received by mail.

Internet and Telephone voting facilities for stockholders of record will be available 24 hours a day and will close at 11:59 p.m., Eastern Time, on June 10, 2025.

If your shares are held in the name of a bank, broker or other holder of record, you will receive instructions on how to vote from the bank, broker or holder of record. You must follow the instructions of such bank, broker or holder of record in order for your shares to be voted.

How many votes are required to approve each proposal?

The table below summarizes the proposals that will be voted on, the vote required to approve each item and how votes are counted:


DUOLINGO 2025 PROXY STATEMENT						3

Proposal

Votes Required for Approval

Voting
Options

Impact of
“Withhold” or “Abstain” Votes

Impact of Broker Non-Votes

Proposal No. 1: Election of Directors

The plurality of the votes cast. This means that the three nominees receiving the highest number of affirmative “FOR” votes will be elected as Class I directors.

“FOR ALL”
“WITHHOLD ALL”
“FOR ALL EXCEPT”

None

None(1)

Proposal No. 2: Ratification of Appointment of Independent Registered Public Accounting Firm for the fiscal year ending December 31, 2025.

The affirmative vote of the holders of a majority in voting power of the votes cast (excluding abstentions and broker non-votes) on such matter.

“FOR”
“AGAINST”
“ABSTAIN”

None(2)

None(3)

Proposal No. 3: Approval, on an advisory (non-binding) basis, the compensation of our named executive officers (“Say-on-Pay” Vote)

The affirmative vote of the holders of a majority in voting power of the votes cast (excluding abstentions and broker non-votes) on such matter.

“FOR”
“AGAINST”
“ABSTAIN”

None(2)

None(1)

(1)As this proposal is not considered a routine matter, brokers lack authority to exercise their discretion to vote uninstructed shares on this proposal, and broker non-votes will have no effect on this proposal.

(2)A vote marked as an “Abstention” is not considered a vote cast and will, therefore, not affect the outcome of this proposal.

(3)As this proposal is considered a routine matter, brokers are permitted to exercise their discretion to vote uninstructed shares on this proposal. As a result, we do not expect any broker non-votes on this proposal.

Why did I receive a notice in the mail regarding the Internet availability of proxy materials instead of a paper copy of proxy materials?

The rules of the Securities and Exchange Commission (the “SEC”) permit us to furnish proxy materials, including this Proxy Statement and the Annual Report, to our stockholders by providing access to such documents on the Internet instead of mailing printed copies. Stockholders will not receive paper copies of the proxy materials unless they request them. Instead, the Notice of Internet Availability of Proxy Materials (the “Notice and Access Card”) provides instructions on how to access and review on the Internet all of the proxy materials. The Notice and Access Card also instructs you as to how to authorize via the Internet or telephone your proxy to vote your shares according to your voting instructions. If you would like to receive a paper or email copy of our proxy materials, you should follow the instructions for requesting such materials described in the Notice and Access Card.

What does it mean if I receive more than one Notice and Access Card or more than one set of proxy materials?


DUOLINGO 2025 PROXY STATEMENT						4

It means that your shares are held in more than one account at the transfer agent and/or with banks or brokers. Please vote all of your shares. To ensure that all of your shares are voted, for each Notice and Access Card or set of proxy materials, please submit your proxy by phone, via the Internet, or, if you received printed copies of the proxy materials, by signing, dating and returning the enclosed proxy card in the enclosed envelope.

Can I vote my shares by filling out and returning the Notice and Access Card?

No. The Notice and Access Card identifies the items to be voted on at the Annual Meeting, but you cannot vote by marking the Notice and Access Card and returning it. If you would like a paper proxy card, you should follow the instructions in the Notice and Access Card. The paper proxy card you receive will also provide instructions as to how to authorize via the Internet or telephone your proxy to vote your shares according to your voting instructions. Alternatively, you can mark the paper proxy card with how you would like your shares voted, sign and date the proxy card, and return it in the envelope provided.

Who is entitled to vote at the Annual Meeting?

Holders of record of shares of our common stock, composed of our Class A common stock and our Class B common stock, as of the close of business on April 15, 2025 (the “Record Date”) will be entitled to notice of and to vote at the Annual Meeting and any continuation, postponement or adjournment thereof. At the close of business on the Record Date, there were 39,240,133 shares of our Class A common stock and 6,193,612 shares of our Class B common stock issued and outstanding and entitled to vote. The rights of holders of Class A and Class B common stock are identical, except voting and conversion rights. Each share of Class A common stock is entitled to one vote, and each share of Class B common stock is entitled to 20 votes and is convertible at any time into one share of Class A common stock.

To participate and vote at the Annual Meeting, you will need the 16-digit control number included in your Notice and Access Card, on your proxy card or on the instructions that accompanied your proxy materials. If your shares are held in “street name,” you should contact your bank or broker to obtain your 16-digit control number or otherwise vote through the bank or broker. If you lose your 16-digit control number, you may join the Annual Meeting as a “Guest” but you will not be able to vote or ask questions. The meeting webcast will begin promptly at 11:30 a.m., Eastern Time. We encourage you to access the meeting prior to the start time. Online check-in will begin at 11:15 a.m., Eastern Time, and you should allow ample time for the check-in procedures. You will need to obtain your own Internet access if you choose to attend the Annual Meeting online and/or vote over the Internet.

What is the difference between being a “record holder” and holding shares in “street name”?

A record holder (also called a “registered holder”) holds shares in his or her name. Shares held in “street name” means that shares are held in the name of a bank, broker or other nominee on the holder’s behalf.

What do I do if my shares are held in “street name”?

If your shares are held in a brokerage account or by a bank or other holder of record, you are considered the “beneficial owner” of shares held in “street name.” The Notice and Access Card or the proxy materials, if you elected to receive a hard copy, has been forwarded to you by your broker, bank or other nominee who is considered, with respect to those shares, the stockholder of record. As the beneficial owner, you have the right to direct your broker, bank or other holder of record on how to vote your shares by following their instructions for voting. Please refer to information from your bank, broker or other nominee on how to submit your voting instructions.

How many shares must be present to hold the Annual Meeting?


DUOLINGO 2025 PROXY STATEMENT						5

A quorum must be present at the Annual Meeting for any business to be conducted. The holders of a majority in voting power of the stock issued and outstanding and entitled to vote, present in person, or by remote communication, if applicable, or represented by proxy, constitutes a quorum for transaction of business at the Annual Meeting. If you sign and return your paper proxy card or authorize a proxy to vote electronically or telephonically, your shares will be counted to determine whether we have a quorum even if you abstain or fail to vote as indicated in the proxy materials.

Broker non-votes will also be considered present for the purpose of determining whether there is a quorum for the Annual Meeting.

What are “broker non-votes”?

A “broker non-vote” occurs when shares held by a broker in “street name” for a beneficial owner are not voted with respect to a proposal because (1) the broker has not received voting instructions from the stockholder who beneficially owns the shares and (2) the broker lacks the authority to vote the shares at their discretion. Proposals No. 1 and No. 3 are considered non-discretionary matters, and a broker will lack the authority to vote uninstructed shares at their discretion on such proposals. Proposal No. 2 is considered a discretionary matter, and a broker will be permitted to exercise its discretion to vote uninstructed shares on this proposal and, as a result, we do not expect any broker non-votes on Proposal No. 2.

What if a quorum is not present at the Annual Meeting?

If a quorum is not present or represented at the scheduled time of the Annual Meeting, (i) the chairperson of the Annual Meeting or (ii) a majority in voting power of the stockholders entitled to vote at the Annual Meeting, present in person or by remote communication, if applicable, or represented by proxy, may adjourn the Annual Meeting until a quorum is present or represented.

How can I attend and vote at the Annual Meeting?

We will be hosting the Annual Meeting live via audio webcast. Any stockholder can attend the Annual Meeting live online at www.virtualshareholdermeeting.com/DUOL2025. If you were a stockholder as of the Record Date, or you hold a valid proxy for the Annual Meeting, you can vote at the Annual Meeting. A summary of the information you need to attend the Annual Meeting online is provided below:

•Instructions on how to attend and participate via the Internet, including how to demonstrate proof of stock ownership, are posted at www.virtualshareholdermeeting.com/DUOL2025.

•Assistance with questions regarding how to attend and participate via the Internet will be provided at www.virtualshareholdermeeting.com/DUOL2025 on the day of the Annual Meeting.

•Webcast starts at 11:30 a.m., Eastern Time.

•You will need your 16-Digit Control Number to enter the Annual Meeting.

•Stockholders may submit questions while attending the Annual Meeting via the Internet.

To attend and participate in the Annual Meeting, you will need the 16-digit control number included in your Notice and Access Card, on your proxy card or on the instructions that accompanied your proxy materials. If your shares are held in “street name,” you should contact your bank or broker to obtain your 16-digit control number or otherwise vote through the bank or broker. If you lose your 16-digit control number, you may join the Annual Meeting as a “Guest” but you will not be able to vote or ask questions.

Will there be a question and answer session during the Annual Meeting?


DUOLINGO 2025 PROXY STATEMENT						6

As part of the Annual Meeting, we will hold a live Q&A session, during which we intend to answer questions submitted online during or prior to the meeting that are pertinent to the Company and the meeting matters, as time permits. Only stockholders that have accessed the Annual Meeting as a stockholder (rather than a “Guest”) by following the procedures outlined above in “Who can attend the Annual Meeting?” will be permitted to submit questions during the Annual Meeting. Each stockholder is limited to no more than two questions. Questions should be succinct and only cover a single topic. We will not address questions that are, among other things:

•irrelevant to the business of the Company or to the business of the Annual Meeting;

•related to material non-public information of the Company, including the status or results of our business since our most recent public disclosure;

•related to any pending, threatened or ongoing litigation;

•related to personal grievances;

•derogatory references to individuals or that are otherwise in bad taste;

•substantially repetitious of questions already made by another stockholder;

•in excess of the two question limit;

•in furtherance of the stockholder’s personal or business interests; or

•out of order or not otherwise suitable for the conduct of the Annual Meeting as determined by the Chair or Secretary in their reasonable judgment.

Additional information regarding the Q&A session will be available in the “Rules of Conduct” available on the Annual Meeting webpage for stockholders that have accessed the Annual Meeting as a stockholder (rather than a “Guest”) by following the procedures outlined above.

What if during the check-in time or during the Annual Meeting I have technical difficulties or trouble accessing the virtual meeting website?

We will have technicians ready to assist you with any technical difficulties you may have accessing the virtual meeting website. If you encounter any difficulties accessing the virtual meeting website during the check-in or meeting time, a technical assistance phone number will be made available on the virtual meeting registration page 15 minutes prior to the start time of the meeting.

How does the Board recommend that I vote?

The Board recommends that you vote:

•FOR each of the director nominees set forth in this Proxy Statement.

•FOR the ratification of the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025.

•FOR the approval, on an advisory (non-binding) basis, of the compensation of our named executive officers.

What if I do not specify how my shares are to be voted?

If you submit a proxy but do not indicate any voting instructions, the persons named as proxies will vote in accordance with the recommendations of the Board. The Board’s recommendations are set forth above, as well as with the description of each proposal in this Proxy Statement.


DUOLINGO 2025 PROXY STATEMENT						7

Who will count the votes?

Representatives of Broadridge Financial Solutions, Inc. (“Broadridge”) will tabulate the votes, and a representative of Broadridge will act as inspector of election.

Can I revoke or change my vote after I submit my proxy?

Yes. Whether you have voted by Internet, telephone or mail, if you are a stockholder of record, you may change your vote and revoke your proxy by:

•sending a written statement to that effect to the attention of our Corporate Secretary at our corporate offices, provided such statement is received no later than June 10, 2025;

•voting again by Internet or telephone at a later time before the closing of those voting facilities at 11:59 p.m., Eastern Time, on June 10, 2025;

•submitting a properly signed proxy card with a later date that is received no later than June 10, 2025; or

•attending the Annual Meeting, revoking your proxy and voting again.

If you hold shares in street name, you may submit new voting instructions by contacting your bank, broker or other nominee. You may also change your vote or revoke your proxy online at the Annual Meeting if you obtain a signed proxy from the record holder (broker, bank or other nominee) giving you the right to vote the shares.

Your most recent proxy card or telephone or Internet proxy is the one that is counted. Your attendance at the Annual Meeting by itself will not revoke your proxy unless you give written notice of revocation to the Company before your proxy is voted or you vote online at the Annual Meeting.

Who will pay for the cost of this proxy solicitation?

We will pay the cost of soliciting proxies. Proxies may be solicited on our behalf by directors, officers or employees (for no additional compensation) in person or by telephone, electronic transmission and facsimile transmission. Brokers and other nominees will be requested to solicit proxies or authorizations from beneficial owners and will be reimbursed for their reasonable expenses.

Where can I find the results of the Annual Meeting?

We plan to announce preliminary voting results at the Annual Meeting and we will report the final results in a Current Report on Form 8-K, which we intend to file with the SEC within the prescribed timing after the annual meeting.

Why hold a virtual meeting?

We want to provide expanded access, improved communication and cost savings for our stockholders and the Company while providing stockholders the same rights and opportunities to participate as they would have at an in-person meeting. Furthermore, as part of our effort to maintain a safe and healthy environment for our directors, members of management and stockholders who wish to attend the Annual Meeting, we believe that hosting a virtual meeting is in the best interest of the Company and its stockholders and a virtual meeting enables increased stockholder attendance and participation because stockholders can participate from any location around the world.


DUOLINGO 2025 PROXY STATEMENT						8

Proposal No. 1: Election of Directors

Board Size and Structure

Our amended and restated certificate of incorporation, as currently in effect (“Certificate of Incorporation”) provides that the number of directors shall be established from time to time by our Board of Directors. Our Board of Directors has fixed the number of directors at ten, and we currently have ten directors serving on the Board.

Our Certificate of Incorporation provides that the Board be divided into three classes, designated as Class I, Class II and Class III, with the number serving on each class in as equal number as possible. Each class of directors must stand for re-election no later than the third annual meeting of stockholders subsequent to their initial appointment or election to the Board, provided that the term of each director will continue until the election and qualification of his or her successor and is subject to his or her earlier death, resignation or removal. Generally, vacancies or newly created directorships on the Board will be filled only by vote of a majority of the directors then in office, or by a sole remaining director. A director appointed by the Board to fill a vacancy will hold office until the next election of the class for which such director was chosen, subject to the election and qualification of his or her successor and his or her earlier death, resignation, retirement, disqualification or removal.

Nominees for Director

Mr. Gordon, Mr. Lilly, and Mr. Schlosser have been nominated by the Board to stand for election at this Annual Meeting. As the directors assigned to Class I, Mr. Gordon, Mr. Lilly, and Mr. Schlosser’s current terms of service will expire at this Annual Meeting. If elected by the stockholders at the Annual Meeting, Mr. Gordon, Mr. Lilly, and Mr. Schlosser will each serve for a three-year term expiring at our annual meeting of stockholders to be held in 2028 (the “2028 Annual Meeting”) and until the election and qualification of his successor or until his earlier death, resignation or removal.

Each person nominated for election has agreed to serve if elected, and management has no reason to believe that any nominee will be unable to serve. If, however, prior to the Annual Meeting, the Board of Directors should learn that any nominee will be unable to serve for any reason, the proxies that otherwise would have been voted for this nominee will be voted for a substitute nominee as selected by the Board. Alternatively, the proxies, at the Board’s discretion, may be voted for that fewer number of nominees as results from the inability of any nominee to serve.

Current Directors
and terms:

Class I Directors:

•Bing Gordon

•John Lilly

•Mario Schlosser

Current terms expire 2025 Annual Meeting

Class II Directors:

•Amy Bohutinsky

•Gillian Munson

•Bonnie Ross

•Jim Shelton

Current terms expire 2026 Annual Meeting

Class III Directors:

•Luis von Ahn

•Sara Clemens

•Severin Hacker

Current terms expire 2027 Annual Meeting


DUOLINGO 2025 PROXY STATEMENT						9

Information About Board Nominees and Continuing Directors

The following pages contain certain biographical information as of April 25, 2025 for each nominee for director and each director whose term as a director will continue after the Annual Meeting, including all positions he or she holds, his or her principal occupation and business experience for the past five years, and the names of other publicly-held companies of which the director or nominee currently serves as a director or has served as a director during the past five years.

We believe that all of our directors and nominees display personal and professional integrity; satisfactory levels of education and/or business experience; broad-based business acumen; an appropriate level of understanding of our business and its industry and other industries relevant to our business; the ability and willingness to devote adequate time to the work of our Board of Directors and its committees, as applicable; skills and personality that complement those of our other directors that helps build a board that is effective, collegial and responsive to the needs of our Company; strategic thinking and a willingness to share ideas; a diversity of experiences, expertise and background; and the ability to represent the interests of all of our stockholders. The information presented below regarding each nominee and continuing director also sets forth specific experience, qualifications, attributes and skills that led our Board of Directors to the conclusion that such individual should serve as a director in light of our business and structure.


DUOLINGO 2025 PROXY STATEMENT						10

Nominees for Election to a Three-Year Term Expiring at the 2028 Annual Meeting of Stockholders

Class I Directors

Age

Director Since

Current Position at Duolingo

Bing Gordon

2020

Director

John Lilly

2021

Director

Mario Schlosser

2024

Director


						Bing Gordon has served as a member of our Board of Directors since February 2020. Since June 2008, Mr. Gordon has served as a partner at Kleiner Perkins Caufield & Byers, a venture capital firm. From 1998 to 2009, he served as the Executive Vice President and Chief Creative Officer of Electronic Arts, a gaming company he co-founded. Mr. Gordon served on the board of directors of Zynga Inc., a publicly-traded video game developer, from July 2008 until its acquisition by Take Two Interactive Software, Inc, a publicly-traded video game developer. He currently serves on the board of directors of Take Two. Mr. Gordon is a special advisor to the board of directors of Amazon, and was previously a member of its board from 2003 to 2018. Mr. Gordon holds a B.A. in English from Yale and an M.B.A. from the Stanford Graduate School of Business. We believe Mr. Gordon is qualified to serve as a member of our Board of Directors due to his extensive corporate governance, business development, strategic planning, and executive compensation experience, together with his senior leadership roles at other technology companies.


						John Lilly has served as a member of our Board of Directors since December 2021. Mr. Lilly is a venture partner at Greylock Partners, a venture capital firm, where he has served since January 2011. Prior to this, Mr. Lilly was with Mozilla Corporation, the organization behind Firefox, the open source Web browser, which he joined in 2005 as Vice President of Business Development. From 2006 to 2008, Mr. Lilly served as Mozilla’s Chief Operating Officer and a member of its Board of Directors, and from 2008 to 2010 served as Chief Executive Officer. Mr. Lilly was the founder, Chief Executive Officer, Chief Technology Officer and Vice President of products for Reactivity, a software company acquired by Cisco Systems in 2007. Previously, he held staff positions at Apple, Sun Microsystems and Trilogy Software. Lilly has been an active participant in open source projects, serving on the boards of the Open Source Applications Foundation and Participatory Culture Foundation. Mr. Lilly earned a B.Sc. and M.Sc. in computer science from Stanford University. We believe Mr. Lilly is qualified to serve as a member of our Board of Directors due to his extensive sales, marketing, business development, strategic planning, and executive compensation experience, together with his senior leadership roles and investment experience at other technology companies.


DUOLINGO 2025 PROXY STATEMENT						11


						Mario Schlosser has served as a member of our Board of Directors since July 2024. Mr. Schlosser is the co-founder of Oscar Health, Inc., a healthcare technology company, where he has served as Chief Technology Officer and President of Technology since April 2023. From December 2012 to April 2023, Mr. Schlosser served as Chief Executive Officer of Oscar and led the company from its inception to serving over one million members. Mr. Schlosser has also served as a member of the board of directors of Oscar since December 2012. Prior to his roles at Oscar, Mr. Schlosser co-founded Vostu, Ltd., a social gaming company in Latin America, where he led the company’s analytics and game design practices from August 2006 to November 2012. From August 2007 to March 2010, Mr. Schlosser served as a Senior Investment Associate at Bridgewater Associates. He currently sits on the board of the Fraunhofer Institute for Applied Information Technology, Tech:NYC, and the Guiding Council of One Mind At Work. Previously, he was a visiting researcher in Stanford University's computer science department where he developed algorithms for information dissemination in dynamic networks. He is the author of 10 computer science publications, including a seminal paper on computing trust in randomized networks. Mr. Schlosser holds a degree in computer science with highest distinction from the University of Hannover in Germany and an MBA from Harvard Business School. We believe Mr. Schlosser is qualified to serve as a member of our Board of Directors due to his extensive experience in corporate governance, financial literacy, information services and technology, cyber security and data privacy, business development and strategic planning, together with his senior leadership roles and background in investing in and fostering the growth of other technology companies.

Class II Directors Whose Term Expire at the 2026 Annual Meeting of Stockholders


Class II Directors	Age	Director Since	Current Position at Duolingo
Amy Bohutinsky	50	2020	Director
Gillian Munson	54	2019	Director
Bonnie Ross	58	2024	Director
Jim Shelton	57	2020	Director


DUOLINGO 2025 PROXY STATEMENT						12


						Amy Bohutinsky has served as a member of our Board of Directors since June 2020. From 2005 to 2019, she held various leadership roles at Zillow Group, Inc., a publicly-traded online real estate marketplace company, including most recently as the Chief Operating Officer, from August 2015 to 2019, and as the Chief Marketing Officer, from March 2011 to August 2015. From 2001 to 2005, Ms. Bohutinsky served in various leadership positions at Hotwire, Inc., an online travel company, including Director of Corporate Communications. Ms. Bohutinsky has consulted as a venture partner at TCV, a private equity and venture capital firm, since 2019. Ms. Bohutinsky has served on the board of directors of Zillow Group since October 2018. Previously, she served on the board of directors of Gap, Inc., a publicly-traded clothing retailer, from 2018 to 2020. She also previously served on the boards of directors of HotelTonight, LLC, a privately held mobile-based hotel booking service (acquired by Airbnb, Inc. in 2019) and Avvo, Inc., a privately held online legal marketplace (acquired by Internet Brands in 2018). Ms. Bohutinsky holds a B.A. in Journalism and Mass Communications from Washington & Lee University. We believe Ms. Bohutinsky is qualified to serve as a member of our Board of Directors due to her considerable corporate governance, legal, regulatory, public policy and marketing experience, together with her experience in senior leadership roles at other consumer-facing technology companies.


						Gillian Munson has served as a member of our Board of Directors since September 2019. Ms. Munson has served as the Chief Financial Officer (CFO) of Vimeo since April 2022. She was the CFO of Iora Health, Inc., a healthcare company, from January 2021 until the company’s sale in September 2021, subsequently acting as Special Advisor to the CFO of the acquiring company, One Medical. Ms. Munson was a Venture Partner at Union Square Ventures from April 2019 to July 2021 and served as CFO of XO Group Inc., the parent company of The Knot Inc., a media and technology company from 2013 to 2019. Ms. Munson’s previous positions include Managing Director at Allen & Company LLC, Vice President, Business Development at Symbol Technologies, LLC, and both Executive Director and Senior Equity Analyst at Morgan Stanley. Ms. Munson has served on the board of directors of Phreesia, Inc., a publicly-traded software company, since May 2019, and previously served on the board of directors of Monster Worldwide, Inc. from 2015 to 2016. Ms. Munson holds a B.A. in Political Science and Economics from the Colorado College in Colorado Springs. We believe Ms. Munson is qualified to serve as a member of our Board of Directors due to her significant corporate governance, financial literacy, business development, risk management and strategic planning experience, together with her experience in senior leadership roles at consumer-facing companies, and her background in investment, banking and equity research.


DUOLINGO 2025 PROXY STATEMENT						13


						Bonnie Ross has served as a member of our Board of Directors since December 2024. Ms. Ross has over 30 years of experience in the gaming industry. From August 2014 to September 2022, Ms. Ross served as Corporate Vice President at Microsoft Corporation and Head of the Halo franchise. In 2019, Ms. Ross was inducted into the Academy of Interactive Arts & Sciences Hall of Fame for her contributions to gaming and her advocacy for diversity and STEM education. She co-founded the Women in Gaming community and is actively involved in promoting further inclusion in technology. Ms. Ross serves on the Dean’s Leadership Council for the College of Natural Sciences at Colorado State University. Ms. Ross holds a B.A. in Technical and Scientific Communication from Colorado State University. We believe Ms. Ross is qualified to serve as a member of our Board of Directors due to her extensive experience in creative leadership roles at a public company, together with her experience in sales, marketing, business development, strategic planning, risk management, including her strategic planning experience at another consumer-facing technology company.


						Jim Shelton has served as a member of our Board of Directors since October 2020. Mr. Shelton has served as the Chief Investment and Impact Officer at the Blue Meridian Partners, a nonprofit funding collaborative, since January 2020, and a Partner of Amandla Enterprises, an impact investment and advisory firm, since July 2018. From July 2016 to July 2018, he served as the President of Education for the Chan Zuckerberg Initiative. From June 2015 to July 2016, Mr. Shelton previously served as the President and Chief Impact Officer of 2U, Inc., an educational technology company. From 2009 to 2015, he held various roles at the US Department of Education, most recently as Deputy Secretary and Chief Operating Officer. Mr. Shelton holds a B.A. in Computer Science from Morehouse College and an M.S. in Education and an M.B.A. from the Stanford Graduate School of Business. We believe Mr. Shelton is qualified to serve as a member of our Board of Directors due to his considerable corporate governance, legal, regulatory, public policy, and strategic planning experience, together with his senior leadership roles at public companies and in the government, as well as his depth of experience in the education sector.

Class III Directors Whose Term Expire at the 2027 Annual Meeting of Stockholders

Class III Directors

Age

Director Since

Current Position with Duolingo

Luis von Ahn, Ph.D.

2011

President, Chief Executive Officer, Co-Founder, and Chairman of the Board

Sara Clemens

2021

Director

Severin Hacker, Ph.D.

2011

Chief Technology Officer, Co-Founder and Director


DUOLINGO 2025 PROXY STATEMENT						14


						Luis von Ahn, Ph.D. has served as a member of our Board of Directors and as our Chief Executive Officer since August 2011, when he co-founded Duolingo with Dr. Hacker. Prior to founding Duolingo, he served as the Chief Executive Officer of reCAPTCHA, Inc., a fraud detection technology company, from 2007 until its acquisition by Google in 2009. Dr. von Ahn has served on the board of directors of Root, Inc., a publicly-traded technology company focusing on personal insurance, from October 2020 to October 2022. Dr. von Ahn holds a B.S. in Mathematics from Duke University and a Ph.D. in Computer Science from Carnegie Mellon University. We believe Dr. von Ahn is qualified to serve as a member of our Board of Directors because of his perspective and experience building and leading our business as co-founder and Chief Executive Officer.


						Sara Clemens has served as a member of our Board of Directors since June 2020. Ms. Clemens served as the Chief Operating Officer at Twitch from January 2018 to February 2022. From 2014 to 2017, she served as the Chief Operating Officer at Pandora Media and, from 2012 to 2013, she served as the Vice President of Corporate Development at LinkedIn. Ms. Clemens is currently a Senior Advisor to Blackstone Growth, and serves on the board of directors of Khosla Ventures Acquisition Co. III and Karat. Ms. Clemens holds a B.A. in English and an M.A. (Hons) from the University of Canterbury, New Zealand. We believe Ms. Clemens’s is qualified to serve as a member of our Board of Directors due to her extensive international business, information services and technology, financial literacy, legal and regulatory compliance, executive compensation, business development and risk management experience, together with her senior leadership roles at other technology companies.


						Severin Hacker, Ph.D. has served as a member of our Board of Directors and as our Chief Technology Officer since August 2011, when he co-founded Duolingo with Dr. von Ahn. Dr. Hacker holds a B.S. in Computer Science from Eidgenossische Technische Hochschule Zurich, Switzerland and a Ph.D. in Computer Science from Carnegie Mellon University. We believe Dr. Hacker is qualified to serve as a member of our Board of Directors because of his perspective and experience building and leading our business as co-founder and Chief Technology Officer.

Board Recommendation

The Board of Directors unanimously recommends a vote FOR the election of each of Bing Gordon, John Lilly and Mario Schlosser as a Class I director to hold office until the 2028 Annual Meeting and until his successor has been duly elected and qualified.


DUOLINGO 2025 PROXY STATEMENT						15

Proposal No. 2 Ratification of Appointment of Independent Registered Public Accounting Firm

Appointment of Independent Registered Public Accounting Firm

The Audit, Risk and Compliance Committee (the “Audit Committee”) appoints our independent registered public accounting firm. In this regard, the Audit Committee evaluates the qualifications, performance and independence of our independent registered public accounting firm and determines whether to re-engage our current firm. As part of its evaluation, the Audit Committee considers, among other factors, the quality and efficiency of the services provided by the firm, including the performance, technical expertise, industry knowledge and experience of the lead audit partner and the audit team assigned to our account; the overall strength and reputation of the firm; the firm’s global capabilities relative to our business; and the firm’s knowledge of our operations. Deloitte & Touche LLP has served as our independent registered public accounting firm since 2018. Neither the accounting firm nor any of its members has any direct or indirect financial interest in or any connection with us in any capacity other than as our auditors and providing audit and permissible non-audit related services. Upon consideration of these and other factors, the Audit Committee has appointed Deloitte & Touche LLP to serve as our independent registered public accounting firm for the fiscal year ending December 31, 2025.

Although ratification by our stockholders of this auditor appointment is not required by our bylaws or otherwise, the Board is submitting the selection of Deloitte & Touche LLP to our stockholders for ratification because we value our stockholders’ views on the Company’s independent registered public accounting firm and believe that it is a good corporate governance practice. If our stockholders do not ratify the selection, it will be considered as notice to the Board of Directors and the Audit Committee to consider the selection of a different firm. Even if the selection is ratified, the Audit Committee, in its discretion, may select a different independent registered public accounting firm at any time during the year if it determines that such a change would be in the best interests of the Company and its stockholders.

Representatives of Deloitte & Touche LLP are expected to attend the Annual Meeting and to have an opportunity to make a statement and be available to respond to appropriate questions from stockholders.

Audit, Audit-Related, Tax and All Other Fees

The following table sets forth the fees of Deloitte & Touche LLP, our independent registered public accounting firm, billed to Duolingo in each of the last two fiscal years.


	Year Ended December 31,
	2024	2023
Audit Fees	$1,624,298	$1,454,919
Audit-Related Fees	—	—
Tax Fees	293,409	306,472
All Other Fees	5,685	—
Total	$1,923,392	$1,761,391

Audit Fees

Audit fees consist of fees for professional services rendered for the audit of our financial statements and review of interim financial statements and related expenses.

Audit-Related Fees

Audit-related fees consist of fees for other audit-type services not reported under “Audit Fees” above.


DUOLINGO 2025 PROXY STATEMENT						16

Tax Fees

Tax fees are fees for a variety of permissible services relating to tax compliance, tax planning and tax advisory services.

All Other Fees

All other fees relate to professional services not included in the categories above, including subscriptions to Deloitte’s accounting reference library.

Pre-Approval Policies and Procedures

The formal written charter for our Audit Committee requires that the Audit Committee pre-approve all audit services to be provided to us, whether provided by our principal auditor or other firms, and all other services (review, attest and non-audit) to be provided to us by our independent registered public accounting firm, other than de minimis non-audit services approved in accordance with applicable SEC rules.

The Audit Committee has adopted a policy (the “Pre-Approval Policy”) that sets forth the procedures and conditions pursuant to which audit and non-audit services proposed to be performed by our independent registered public accounting firm may be pre-approved. The Pre-Approval Policy generally provides that the Audit Committee will not engage an independent registered public accounting firm to render any audit, audit-related, tax or permissible non-audit service unless the service is either (i) explicitly approved by the Audit Committee (“specific pre-approval”) or (ii) entered into pursuant to the pre-approval policies and procedures described in the Pre-Approval Policy (“general pre-approval”). Unless a type of service to be provided by our independent registered public accounting firm has received general pre-approval under the Pre-Approval Policy, it requires specific pre-approval by the Audit Committee or by one or more designated members of the Audit Committee to whom the committee has delegated the authority to grant pre-approvals. Any member of the Audit Committee to whom the committee delegates authority to make pre-approval decisions must report any such pre-approval decisions to the Audit Committee at its next scheduled meeting. If circumstances arise where it becomes necessary to engage the independent registered public accounting firm for additional services not contemplated in the original pre-approval categories or above the pre-approved amounts, the Audit Committee requires pre-approval for such additional services or such additional amounts. Any proposed services exceeding pre-approved cost levels or budgeted amounts will also require specific pre-approval. For both types of pre-approval, the Audit Committee will consider whether such services are consistent with the SEC’s rules on auditor independence.

On an annual basis, the Audit Committee reviews and generally pre-approves the services (and related fee levels or budgeted amounts) that may be provided by our independent registered accounting firm without first obtaining specific pre-approval from the Audit Committee. The Audit Committee may revise the list of general pre-approved services from time to time, based on subsequent determinations.

The above-described services provided to us by Deloitte & Touche LLP in each of the last two fiscal years were provided in accordance with such pre-approval policies.

Board Recommendation

The Board of Directors unanimously recommends a vote FOR the ratification of the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025.


DUOLINGO 2025 PROXY STATEMENT						17

Audit Committee Report

The Audit Committee operates pursuant to a charter which is reviewed annually by the Audit Committee. Additionally, a brief description of the primary responsibilities of the Audit Committee is included in this Proxy Statement under the discussion of “Corporate Governance— Audit Committee.” Under the Audit Committee charter, management is responsible for the preparation, presentation and integrity of the Company’s financial statements, the appropriateness of accounting principles and financial reporting policies and for establishing and maintaining our internal control over financial reporting. The independent registered public accounting firm is responsible for auditing our financial statements and expressing an opinion as to their conformity with accounting principles generally accepted in the United States.

In the performance of its oversight function, the Audit Committee reviewed and discussed with management and Deloitte & Touche LLP, as the Company’s independent registered public accounting firm, the Company’s audited financial statements for the fiscal year ended December 31, 2024. The Audit Committee also discussed with the Company’s independent registered public accounting firm the matters required to be discussed by the applicable requirements of the Public Company Accounting Oversight Board (the “PCAOB”) and the SEC. In addition, the Audit Committee received and reviewed the written disclosures and the letters from the Company’s independent registered public accounting firm required by applicable requirements of the PCAOB, regarding such independent registered public accounting firm’s communications with the Audit Committee concerning independence, and discussed with the Company’s independent registered public accounting firm their independence from the Company.

Based upon the review and discussions described in the preceding paragraph, the Audit Committee recommended to the Board that the Company’s audited financial statements be included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2024 filed with the SEC.

Submitted by the Audit Committee of the Company’s Board of Directors

Gillian Munson, Chair

Amy Bohutinsky

Jim Shelton

Sara Clemens


DUOLINGO 2025 PROXY STATEMENT						18

Proposal No. 3 Approval, on an advisory (non-binding) basis, of the compensation of our named executive officers (“Say-on-Pay” Vote).

Say-on-Pay

In accordance with the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and Rule 14A(a)-(1) under the Securities Exchange Act of 1934, as amended, (the “Exchange Act”), the Company requests that our stockholders cast a non-binding, advisory vote in favor of the compensation of our named executive officers as disclosed in this Proxy Statement pursuant to the SEC’s compensation disclosure rules. This proposal, commonly known as a “say-on-pay” proposal and vote, is not intended to address any specific item of compensation, but rather the overall compensation of our named executive officers and the philosophy, policies and practices described in this Proxy Statement.

After considering the voting results of the advisory vote on the frequency of our say-on-pay vote at the 2023 Annual Meeting, our Board of Directors determined to hold our Say-on-Pay Vote every year.

We believe that our compensation programs and policies for the year ended December 31, 2024 were an effective incentive for the achievement of the Company’s goals, aligned with stockholders’ interest and worthy of stockholder support. We encourage our stockholders to review the “Compensation Discussion and Analysis” and “Executive Compensation Tables” sections of this Proxy Statement for additional detail regarding the compensation of our named executive officers.

As an advisory approval, this proposal is not binding upon us, our Board of Directors or its Compensation and Leadership Committee (the “Compensation Committee”), which is responsible for the design and administration of our executive compensation program. However, the Board of Directors and the Compensation Committee value the opinions of our stockholders expressed through your vote on this proposal and continually consider stockholder feedback and the results of Say-on-Pay Votes when making future compensation decisions. Accordingly, we ask our stockholders to vote “FOR” the following resolution at the Annual Meeting:

“RESOLVED, that the Company’s stockholders approve, on an advisory (non-binding) basis, the compensation of the Company’s named executive officers as described in the Compensation Discussion and Analysis and disclosed in the Summary Compensation Table and related compensation tables and narrative disclosure set forth in the Proxy Statement for the 2025 Annual Meeting of Stockholders.”

Board Recommendation

The Board of Directors unanimously recommends a vote FOR the resolution to approve, on a non-binding basis, the compensation of our named executive officers, as disclosed in the Compensation Discussion and Analysis of this Proxy Statement, the accompanying compensation tables and the related narrative disclosure of this Proxy Statement.


DUOLINGO 2025 PROXY STATEMENT						19

Executive Officers

The table below identifies and sets forth certain biographical and other information regarding our executive officers as of April 25, 2025. There are no family relationships between or among any of our executive officers or directors.


Executive Officer	Age	Position	In Current Position Since
Luis von Ahn, Ph.D.	46	President, Chief Executive Officer, Co-Founder, and Chairman of the Board	2011
Severin Hacker, Ph.D.	40	Chief Technology Officer and Director	2011
Matthew Skaruppa	43	Chief Financial Officer	2020
Natalie Glance, Ph.D.	57	Chief Engineering Officer	2022
Robert Meese	48	Chief Business Officer	2021
Stephen Chen	51	General Counsel	2020

See pages 15 and 16 of this Proxy Statement for the biographies of Luis von Ahn and Severin Hacker.


						Matthew Skaruppa has served as our Chief Financial Officer since February 2020. From January 2016 to February 2020, he served as a Vice President of Goldman Sachs. Previously, Mr. Skaruppa served as a Principal at KKR Capstone from 2010 to 2015 and as a consultant at Bain & Company from 2004 to 2008. Mr. Skaruppa holds a B.S. in Chemical Engineering from Northwestern University and an M.B.A. from the Stanford Graduate School of Business.


						Natalie Glance, Ph.D. has served as our Chief Engineering Officer since November 2022, prior to which she served as our Senior Vice President of Engineering since December 2019, our Vice President of Engineering from February 2017 to December 2019 and our Director of Engineering from March 2015 to February 2017. From 2007 to 2015, Dr. Glance served as an Engineering Manager at Google. Dr. Glance holds a B.A. in Physics from Princeton University and a Ph.D. in Physics from Stanford University.


DUOLINGO 2025 PROXY STATEMENT						20


						Robert Meese has served as our Chief Business Officer since March 2021, after having served as our Chief Revenue Officer from December 2018 to March 2021 and our Vice President of Business from September 2016 to December 2018. From August 2008 to September 2016, he held various roles at Google, including most recently as Director, Global Head of Games Business Development, Google Play. Mr. Meese holds a B.S. in Economics and a B.S. in Computer Science from the University of Pennsylvania and an M.B.A. from the Massachusetts Institute of Technology.


						Stephen Chen has served as our General Counsel since March 2020. From July 2014 to February 2020, he served as Associate General Counsel for Proofpoint, Inc., an enterprise security company. Mr. Chen previously served as Associate General Counsel of Marin Software, Director and Senior Counsel, Mergers and Acquisition at VMWare, Inc. and Legal Director of Yahoo!. Mr. Chen holds a B.A. in History and a J.D. from Harvard University.


DUOLINGO 2025 PROXY STATEMENT						21

Corporate Governance


Corporate Governance Guidelines

Our Board of Directors has adopted Corporate Governance Guidelines. A copy of these Corporate Governance Guidelines can be found in the “Governance” section of the “Investors” page of our website located at www.investors.duolingo.com, or by writing to our Secretary at our offices at 5900 Penn Avenue, Pittsburgh, Pennsylvania 15206. Among the topics addressed in our Corporate Governance Guidelines are:
•Board independence and qualifications •Executive sessions of independent directors •Selection of new directors •Director orientation and continuing education •Limits on board service •Change of principal occupation •Term limits •Director responsibilities •Director compensation			•Stock ownership •Conflicts of interest •Board access to senior management •Board access to advisors •Board and committee self-evaluations •Board meetings •Meeting attendance by directors and non-directors •Meeting materials •Succession planning

Board Leadership Structure

Our Corporate Governance Guidelines provide our Board of Directors with flexibility to combine or separate the positions of Chairperson of the Board and Chief Executive Officer in accordance with its determination that utilizing one or the other structure would be in the best interests of the Company and its stockholders. If the Chairperson of the Board is a member of management or does not otherwise qualify as independent, our Corporate Governance Guidelines provide that the independent directors may appoint a lead independent director (the “Lead Director”).

Dr. von Ahn, our Founder and Chief Executive Officer, serves as Chairman of our Board and presides over meetings of our Board, holds such other powers, and carries out such other duties as are customarily carried out by the chair of a board. The Board believes that this current leadership structure is appropriate and is in the best interests of the Company and its stockholders. As the Company’s founder and, having served as Chairman and as Chief Executive Officer since that time, Dr. von Ahn possesses detailed and in‑depth knowledge of the issues, opportunities and challenges facing us and our business and, therefore, is best positioned to develop agendas that focus the Board’s time and attention on the most critical matters, while helping to minimize the potential for confusion or duplication of efforts. Serving in both these roles since the Company was founded has allowed Dr. von Ahn to be seen by participants in our industry and by our customers, business partners, investors and other stakeholders as providing strong leadership for our Company and in our industry.

We recognize that different leadership structures may be appropriate for companies in different situations and at different points in time in a company’s development and believe that no one structure is suitable for all companies. Accordingly the Board will continue to periodically review our leadership structure and make such changes in the future as it deems appropriate and in the best interests of the Company and its stockholders.

Director Independence

Under our Corporate Governance Guidelines and the applicable Nasdaq Stock Market LLC (“Nasdaq”) rules (the “Nasdaq rules”), a director does not qualify as independent unless the Board affirmatively determines that he or she does not have a relationship with us that could compromise his or her ability to exercise independent judgement in carrying out his or her responsibilities as a director. In addition, the director must not be precluded from qualifying as independent under the per se bars set forth by the Nasdaq rules.


DUOLINGO 2025 PROXY STATEMENT						22

Our Board has undertaken a review of its composition, the composition of its committees and the independence of our directors and considered whether any director has a material relationship with us that could compromise his or her ability to exercise independent judgment in carrying out his or her responsibilities as a director. Based upon information requested from and provided by each director concerning his or her background, employment and affiliations, including family relationships, our Board of Directors has determined that none of Mmes. Bohutinsky, Clemens, Munson, and Ross and Messrs. Gordon, Lilly, Schlosser, and Shelton, representing eight of our ten directors, has a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director and that each of these directors qualifies as “independent” as that term is defined under the Nasdaq rules. In making these determinations, our Board considered the relationships that each non-employee director has with us and all other facts and circumstances known to it that our Board deemed relevant in determining their independence, including the director’s beneficial ownership of our common stock and the relationships of our non-employee directors with certain of our significant stockholders.

Board Committees

Our Board of Directors has four standing committees: an Audit Committee, a Compensation Committee, a Nominating and Corporate Governance Committee and a Mergers and Acquisitions Committee, each of which has the composition and the responsibilities described below. In addition, from time to time, special committees may be established under the direction of our Board when necessary to address specific issues. Each of the Audit Committee, the Compensation Committee, the Nominating and Corporate Governance Committee and the Mergers and Acquisitions Committee operates under a written charter.

Director

Audit
Committee

Compensation
Committee

Nominating and

Corporate Governance Committee

Mergers and Acquisition Committee

Amy Bohutinsky

Chair

Sara Clemens

Bing Gordon

John Lilly

Gillian Munson

Chair

Bonnie Ross

Mario Schlosser

Chair

Jim Shelton

Audit Committee

Our Audit Committee is responsible for, among other things:

•overseeing our accounting and financial reporting process;


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•appointing, compensating, retaining and overseeing the work of our independent auditor and any other registered public accounting firm engaged for the purpose of preparing or issuing an audit report or related work or performing other audit, review or attest services for us;

•discussing with our independent auditor any audit problems or difficulties and management’s response;

•pre-approving all audit and non-audit services provided to us by our independent auditor (other than those provided pursuant to appropriate pre-approval policies established by the Audit Committee or exempt from such requirement under the rules of the Securities and Exchange Commission);

•reviewing and discussing our annual and quarterly financial statements with management and our independent auditor;

•assisting the Board in its oversight of risk management in areas affecting or related to financial, legal and regulatory compliance, information technology, cybersecurity, data privacy risks, and sustainability-related risks, including climate-related financial risks;

•reviewing and approving or ratifying any related person transactions;

•establishing procedures for the receipt, retention and treatment of complaints received by us regarding accounting, internal accounting controls or auditing matters, and for the confidential and anonymous submission by our employees of concerns regarding questionable accounting or auditing matters;

•discussing with management procedures with respect to risk assessment and risk management; and

•preparing the Audit Committee report required by SEC rules.

Our Audit Committee currently consists of Amy Bohutinsky, Sara Clemens, Gillian Munson, and Jim Shelton, with Ms. Munson serving as chair. All members of our Audit Committee meet the requirements for financial literacy under the applicable Nasdaq rules and regulations. Our Board of Directors has affirmatively determined that each member of our Audit Committee qualifies as “independent” under Nasdaq’s additional standards applicable to Audit Committee members and Rule 10A-3 of the Exchange Act of 1934, as amended (the “Exchange Act”) applicable to Audit Committee members. In addition, our Board of Directors has determined that Ms. Munson qualifies as an “audit committee financial expert,” as such term is defined in Item 407(d)(5) of Regulation S-K.

Compensation Committee

Our Compensation Committee is responsible for, among other things:

•reviewing the compensation of the Chief Executive Officer and any other executive officer who is a member of the Board of Directors (an “Officer Director”) in light of market trends in executive compensation and make recommendations to the Board of Directors regarding compensation of the Chief Executive Officer and Officer Director;

•reviewing and approving corporate goals and objectives relevant to the compensation of our executive officers other than the Chief Executive Officer and the Officer Director (“Other Executive Officers”), evaluating such Other Executive Officers performance in light of these goals and objectives and setting our Other Executive Officers compensation;

•review and discuss with management and the Board of Directors our compensation philosophy and practices;

•reviewing our policies, programs and initiatives with respect to the Company’s leadership;

•reviewing and making recommendations to our Board of Directors regarding director compensation;

•reviewing and approving or making recommendations to our Board of Directors regarding our incentive compensation and equity-based plans and arrangements;


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•appointing and overseeing any compensation consultants;

•oversee our strategy, policies and practices relating to human capital management;

•reviewing and discussing annually with management our “Compensation Discussion and Analysis,” to the extent required; and

•preparing the annual Compensation Committee report required by SEC rules, to the extent required.

Our Compensation Committee currently consists of Sara Clemens, John Lilly, Bonnie Ross, and Mario Schlosser with Mr. Schlosser serving as chair. Our Board of Directors has determined that each member of our Compensation Committee qualifies as “independent” under Nasdaq’s additional standards applicable to Compensation Committee members and is a “non-employee director” as defined in Section 16b-3 of the Exchange Act.

Pursuant to the Compensation Committee’s charter, the Compensation Committee has the authority to retain or obtain the advice of compensation consultants, legal counsel and other advisors to assist in carrying out its responsibilities. Before selecting any such consultant, counsel or advisor, the Compensation Committee reviews and considers the independence of such consultant, counsel or advisor in accordance with applicable Nasdaq rules. We must provide appropriate funding for payment of reasonable compensation to any advisor retained by the Compensation Committee.

Compensation Consultants

The Compensation Committee has the authority under its charter to retain outside consultants or advisors, as it deems necessary or advisable. In accordance with this authority, during 2024, the Compensation Committee engaged the services of Compensia as its independent outside compensation consultant.

All executive compensation services provided by Compensia during 2024 were conducted under the direction or authority of the Compensation Committee, and all work performed by Compensia was approved by the Compensation Committee. The Compensation Committee evaluated whether any work provided by Compensia raised any conflict of interest for services performed during 2024 and determined that it did not.

During 2024, Compensia did not provide any services to us other than advising on 1) executive, employee and director compensation and 2) broad-based plans that do not discriminate in scope, terms, or operation, in favor of our executive officers or directors, and that are available generally to all salaried employees. For additional information of the services provided by Compensia during 2024, see “Compensation Discussion and Analysis – Compensation Determination Process—Role of the Compensation Consultant.”

Nominating and Corporate Governance Committee

Our Nominating and Corporate Governance Committee is responsible for, among other things:

•identifying individuals qualified to become members of our Board and ensure the Board has the requisite expertise and consists of persons with sufficiently diverse and independent backgrounds;

•recommending to our Board the persons to be nominated for election as directors and to each committee of the Board;

•developing and recommending to our Board corporate governance guidelines, and reviewing and recommending to our Board proposed changes to our corporate governance guidelines from time to time; and

•overseeing the annual evaluations of our Board, its committees and management.

Our Nominating and Corporate Governance Committee currently consists of Amy Bohutinsky, Bing Gordon and Jim Shelton, with Ms. Bohutinsky serving as chair. Our Board has determined that each member of our Nominating and Corporate Governance Committee qualifies as “independent” under applicable Nasdaq rules applicable to Nominating and Corporate Governance Committee members.


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Mergers and Acquisitions Committee

Our Merger and Acquisition Committee is responsible for, among other things:

•reviewing, assessing, and approving certain acquisitions, investments, mergers, and similar strategic transactions in accordance with the transaction approval authority parameters;

•negotiating on behalf of the Company, the price, structure, form, terms and conditions of any such applicable transactions, and the form, terms and conditions of any and all agreements as shall be deemed necessary, appropriate or advisable in connection with any such transaction; and

•Overseeing due diligence processes with respect to acquisitions, divestitures, and investment strategies.

Our Mergers and Acquisitions Committee currently consists of Sara Clemens, John Lilly, Bonnie Ross and Mario Schlosser.

Board and Board Committee Meetings and Attendance

During 2024, our Board of Directors met five times, the Audit Committee met four times, the Compensation Committee met four times, the Nominating and Corporate Governance Committee met three times, and the Mergers and Acquisition Committee met four times. In 2024, each of our incumbent directors then-serving attended at least 75% of the aggregate meetings of the Board and committees on which he or she served as a member.

Executive Sessions

The independent directors meet at least twice a year in a private session that excludes management and any non-independent directors. The independent directors in attendance determine which member will preside at such session.


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Director Attendance at Annual Meeting of Stockholders

We do not have a formal policy regarding the attendance of our Board members at our annual meetings of stockholders, but we expect all directors to make every effort to attend any meeting of stockholders. Four of our board members attended our annual meeting of stockholders held in 2024.

Director Nominations Process

The Nominating and Corporate Governance Committee is responsible for recommending candidates to serve on the Board and its committees. In considering whether to recommend any particular candidate to serve on the Board or its committees or for inclusion in the Board’s slate of recommended director nominees for election at the annual meeting of stockholders, the Nominating and Corporate Governance Committee considers the criteria set forth in our Corporate Governance Guidelines. Specifically, the Nominating and Corporate Governance Committee considers candidates who have a high level of personal and professional integrity, strong ethics and values and the ability to make mature business judgments and may take into account many factors, including, but not limited to: personal and professional integrity, ethics and values; experience in corporate management, such as serving as an officer or former officer of a publicly held company; strong finance experience; relevant social policy concerns; experience relevant to the Company’s industry; experience as a board member or executive officer of another publicly held company; relevant academic expertise or other proficiency in an area of the Company’s operations; diversity of expertise and experience in substantive matters pertaining to the Company’s business relative to other board members; diversity of background and perspective; practical and mature business judgment, including, but not limited to, the ability to make independent analytical inquiries; and any other relevant qualifications, attributes or skills. In determining whether to recommend a director for re-election, the Nominating and Corporate Governance Committee may also consider potential conflicts of interest with the candidate’s other personal and professional pursuits, the director’s past attendance at meetings and participation in and contributions to the activities of the Board.

We aim to review a variety of qualified candidates from different backgrounds in identifying director nominees, and do not have a formal diversity policy. The Board evaluates each individual in the context of the Board as a whole, with the objective of assembling a group that has the necessary tools to perform its oversight function effectively in light of the Company’s business and structure.

In identifying prospective director candidates, the Nominating and Corporate Governance Committee may seek referrals from other members of the Board, management, stockholders and other sources, including third party recommendations. The Nominating and Corporate Governance Committee also may, but need not, retain a search firm in order to assist it in identifying candidates to serve as directors of the Company. The Nominating and Corporate Governance Committee uses the same criteria for evaluating candidates regardless of the source of the referral or recommendation. When considering director candidates, the Nominating and Corporate Governance Committee seeks individuals with backgrounds and qualities that, when combined with those of our incumbent directors, provide a blend of skills and experience to further enhance the Board’s effectiveness. In connection with its annual recommendation of a slate of nominees, the Nominating and Corporate Governance Committee also may assess the contributions of those directors recommended for re-election in the context of the Board evaluation process and other perceived needs of the Board.

Mr. Schlosser was initially introduced to our executive team through a service provider of the Company. Ms. Ross was independently identified by a third-party search firm retained to identify potential Board members. Each of the director nominees to be elected at the Annual Meeting was evaluated in accordance with our standard review process for director candidates in connection with their nomination for reelection, as applicable, at the Annual Meeting.


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When considering whether the directors and nominees have the experience, qualifications, attributes and skills, taken as a whole, to enable the Board to satisfy its oversight responsibilities effectively in light of our business and structure, the Board focused primarily on the information discussed in each of the Board member’s biographical information set forth above. We believe that our directors provide an appropriate mix of experience and skills relevant to the size and nature of our business. This process resulted in the Board’s nomination of the incumbent directors named in this Proxy Statement and proposed for election by you at the Annual Meeting.

The Nominating and Corporate Governance Committee will consider director candidates recommended by stockholders. The Nominating and Corporate Governance Committee will review and evaluate information available to it regarding candidates proposed by stockholders and will apply the same criteria and follow substantially the same process in considering them as it does in considering other director candidates. Stockholders wishing to propose a candidate for consideration may do so by submitting their recommendation to the attention of the Corporate Secretary, Duolingo, Inc., 5900 Penn Avenue, Pittsburgh, Pennsylvania 15206.

Board Role in Risk Oversight

The Board of Directors has overall responsibility for risk oversight, including, as part of regular Board and committee meetings, general oversight of executives’ management of risks relevant to the Company. A fundamental part of risk oversight is not only understanding the material risks a company faces and the steps management is taking to manage those risks, but also understanding what level of risk is appropriate for the Company. The involvement of the Board of Directors in reviewing our business strategy is an integral aspect of the Board’s assessment of management’s tolerance for risk and its determination of what constitutes an appropriate level of risk for the Company. While the full Board has overall responsibility for risk oversight, it is supported in this function by its Audit Committee, Compensation Committee and Nominating and Corporate Governance Committee. Each of the committees regularly reports to the Board.

The Audit Committee also has responsibility for oversight of risks and exposures associated with financial matters, particularly financial reporting, tax, accounting, disclosure, internal control over financial reporting, investment guidelines, credit and liquidity matters, the Company’s programs, plans and policies relating to legal and regulatory compliance and strategy, and the Company’s operational infrastructure, particularly reliability, business continuity, capacity, security, information technology, privacy and cybersecurity, and sustainability-related risks, including climate-related financial risks. Through its regular meetings with management, including the finance and legal functions, and advisors, the Audit Committee reviews and discusses significant areas of our business and summarizes for the Board areas of risk and the appropriate mitigating factors. The Compensation Committee reviews and discusses with management risks arising from our compensation philosophy and practices applicable to all employees and evaluating compensation policies and practices that could mitigate such risks. The Nominating and Corporate Governance Committee assists the Board by overseeing and evaluating programs and risks associated with Board organization, membership and structure, and corporate governance. In addition, our Board receives periodic detailed operating performance reviews from management.

Committee Charters and Corporate Governance Guidelines

Our Corporate Governance Guidelines, charters of the Audit Committee, Compensation Committee and Nominating and Corporate Governance Committee and other corporate governance information are available under the Governance section of the Investor Relations page of our website located at www.investors.duolingo.com, or by writing to our Corporate Secretary at our offices at 5900 Penn Avenue, Pittsburgh, Pennsylvania 15206.

Code of Business Conduct and Ethics

We have adopted a Code of Ethics and Conduct (the “Code of Conduct”) that applies to all of our directors, officers and employees, including our principal executive officer, principal financial officer or controller, or persons performing similar functions. Our Code of Conduct is available under the Governance section of the Investor Relations page of our website located at www.investors.duolingo.com. In addition, we intend to post on our website all disclosures that are required by law or the Nasdaq rules concerning any amendments to, or waivers of, any provisions of our Code of Conduct.


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Insider Trading Compliance Policy

Our Board of Directors has adopted an Insider Trading Policy governing the purchase, sale and other dispositions of the Company’s securities that applies to all Company personnel, including directors, officers, employees, and other covered persons. Among other things, our Insider Trading Policy prohibits covered persons from trading in the Company’s securities while in possession of material, non-public information except under pre-approved 10b5-1 trading plans (“Rule 10b5-1 Plans”) and misusing such information, such as by “tipping” or making unauthorized disclosure. The Insider Trading Policy also specifies that officers, directors and specified employees may trade in our securities only during “open window” periods and must pre-clear all purchases and sales of our securities under the Policy. The Company believes that its Insider Trading Policy is reasonably designed to promote compliance with insider trading laws, rules and regulations, and listing standards applicable to the Company.

The foregoing summary does not purport to be complete and is qualified in its entirety by reference to the full text of our Insider Trading Policy, a copy of which is filed as Exhibit 19.1 to our Annual Report on Form 10-K for the fiscal year ended December 31, 2024.

Anti-Hedging Policy

Our Insider Trading Policy prohibits our directors, officers and employees, as well as persons and entities over which they have control, from engaging in hedging or monetization transactions, such as zero-cost collars and forward sale contracts, that allow an insider to lock in much of the value of his or her stock holdings, often in exchange for all or part of the potential for upside appreciation in the stock. These transactions allow the insider to continue to own the covered securities, but without the full risks and rewards of ownership. When that occurs, the insider may no longer have the same objectives as the Company’s other stockholders.

Communications with the Board

Any stockholder or any other interested party who desires to communicate with our Board of Directors, our non-management directors or any specified individual director, may do so by directing such correspondence to the attention of the Corporate Secretary at our offices at 5900 Penn Avenue, Pittsburgh, Pennsylvania 15206. The Corporate Secretary will forward the communication to the appropriate director or directors as appropriate.

SEC Form DEF 14A filed by Duolingo Inc.