John Osborne Lilly III - 10 Oct 2026 Form 4 Insider Report for Duolingo, Inc. (DUOL)

Reporting relationship: Director
Issuer ticker: DUOL
Reported as of: 10 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Oct 2026, 20:13:11 UTC
Prior SEC filing: 01 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Stephen Chen, as Attorney-in-Fact for John Osborne Lilly III

Key filing fact

John Osborne Lilly III filed Form 4 for Duolingo, Inc. (DUOL) on 13 Oct 2026.

Key facts

This page summarizes John Osborne Lilly III's Form 4 filing for Duolingo, Inc. (DUOL).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 13 Oct 2026, 20:13.

Change

Previous filing in this sequence was filed on 01 Sep 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 0001897305 Primary reporting owner

Lilly III John Osborne

Relationship: Director
Address: C/O DUOLINGO, INC., 5900 PENN AVENUE, PITTSBURGH
Signature: /s/ Stephen Chen, as Attorney-in-Fact for John Osborne Lilly III
Signature date: 13 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DUOL transaction

Class A Common Stock

Award

Transaction value
Shares: +98
Change %: +1.1%
Price: $149.92^*
Shares after: 9,121
Date: 10 Oct 2026
Ownership: Direct
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Represents an award of fully vested restricted stock units ("RSUs") in lieu of cash retainers pursuant to reporting person's election under the Issuer's Amended and Restated Non-Employee Director Compensation Program (the "Plan"). Each RSU represents the right to receive one share of the Issuer's Class A Common Stock and will be settled either on a date selected by the reporting person pursuant to the Plan or as otherwise provided under the Plan.