Natalie Glance - 05 Dec 2025 Form 4 Insider Report for Duolingo, Inc. (DUOL)

Role: Chief Engineering Officer
Signature: /s/ Stephen Chen, as Attorney-in-Fact for Natalie Glance
Issuer symbol: DUOL
Transactions as of: 05 Dec 2025
Net transactions value: +$47,500
Form type: 4
Filing time: 09 Dec 2025, 16:17:43 UTC
Previous filing: 19 Nov 2025
Next filing: 20 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Glance Natalie	Chief Engineering Officer	C/O DUOLINGO, INC., 5900 PENN AVENUE, PITTSBURGH	/s/ Stephen Chen, as Attorney-in-Fact for Natalie Glance	09 Dec 2025	0001870350

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	DUOL	Class A Common Stock	Options Exercise	$47,500	+9,500	+8.5%	$5.00	120,666	05 Dec 2025	Direct
holding	DUOL	Class A Common Stock						130	05 Dec 2025	By son

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	DUOL	Stock Option (Right to Buy)	Options Exercise	$0	-9,500	-45%	$0.000000	11,834	05 Dec 2025	Class A Common Stock	9,500	$5.00	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The shares subject to the option are fully vested and exercisable.