Duolingo, Inc. — Director's Dealing 2026

Feb 20, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Duolingo, Inc. (DUOL)
CIK: 0001562088
Period of Report: 2026-02-17

Reporting Person: Chen Stephen C. (General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-17	Class A Common Stock	S	896	$110.06	Disposed	32446	Direct
2026-02-18	Class A Common Stock	S	821	$111.83	Disposed	31625	Direct
2026-02-18	Class A Common Stock	S	480	$113.9504	Disposed	31145	Direct
2026-02-18	Class A Common Stock	S	520	$114.5519	Disposed	30625	Direct
2026-02-18	Class A Common Stock	S	80	$115.47	Disposed	30545	Direct

Footnotes

F1: Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs") and delivery of shares.

F2: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on May 27, 2025.

F3: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $111.83 to $112.79, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F4: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $113.31 to $114.23, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F5: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $114.31 to $115.23, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F6: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $115.47 to $115.52, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.