Luis von Ahn - 27 May 2026 Form 4 Insider Report for Duolingo, Inc. (DUOL)

Reporting relationship: President & CEO, Co-Founder, Director, 10%+ Owner
Issuer ticker: DUOL
Reported as of: 27 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 29 May 2026, 16:07:55 UTC
Prior SEC filing: 13 May 2026
Next SEC filing: 04 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Stephen Chen, as Attorney-in-Fact for Luis von Ahn

Key filing fact

Luis von Ahn filed Form 4 for Duolingo, Inc. (DUOL) on 29 May 2026.

Key facts

This page summarizes Luis von Ahn's Form 4 filing for Duolingo, Inc. (DUOL).
3 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 29 May 2026, 16:07.

Change

Previous filing in this sequence was filed on 13 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001829259 Primary reporting owner

von Ahn Luis

Relationship: President & CEO, Co-Founder, Director, 10%+ Owner
Address: C/O DUOLINGO, INC., 5900 PENN AVENUE, PITTSBURGH
Signature: /s/ Stephen Chen, as Attorney-in-Fact for Luis von Ahn
Signature date: 29 May 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DUOL transaction Derivative

Performance-Based Restricted Stock Units

Options Exercise

Transaction value
Shares: -120,000
Change %: -22%
Price: $0.000000^*
Shares after: 420,000
Date: 27 May 2026
Ownership: Direct
Underlying class: Class B Common Stock
Underlying amount: 120,000
Exercise price
Footnotes: F1, F2

DUOL transaction Derivative

Class B Common Stock

Options Exercise

Transaction value
Shares: +120,000
Change %: +3.6%
Price: $0.000000^*
Shares after: 3,422,995
Date: 27 May 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 120,000
Exercise price
Footnotes: F3

DUOL transaction Derivative

Class B Common Stock

Tax liability

Transaction value
Shares: -54,875
Change %: -1.6%
Price: $107.82^*
Shares after: 3,368,120
Date: 27 May 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 54,875
Exercise price
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The performance-based condition will be satisfied upon the Issuer's Class A common stock achieving certain stock price hurdles over a period of ten years. Vested PSUs will be settled by the issuance of the underlying Class B Common Stock on the first anniversary of vesting, subject to acceleration upon a termination of employment or a change in control of the Issuer.

Footnote F2

Each Performance-Based Restricted Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Class B Common Stock upon vesting. The PSUs vest upon the satisfaction of both a service-based condition and a performance-based condition. The service-based condition is satisfied as to 25% of the PSUs on each anniversary of the completion of the Issuer's initial public offering of Class A common stock based on the Reporting Person's continuous service as CEO to the Issuer through the applicable vesting dates, subject to acceleration upon a cessation of service as CEO as a result of death or permanent disability.

Footnote F3

Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock in connection with: (i) any transfer, whether or not for value, except for certain permitted transfers further described in the Issuer's amended and restated certificate of incorporation, (ii) such time as the aggregate number of shares of Class B Common Stock outstanding ceases to represent 5% of the aggregate number of shares of Common Stock outstanding, and (iii) the death of the Reporting Person.