Luis von Ahn - 17 Feb 2026 Form 4 Insider Report for Duolingo, Inc. (DUOL)

Role: President & CEO, Co-Founder, Director, 10%+ Owner
Signature: /s/ Stephen Chen, as Attorney-in-Fact for Luis von Ahn
Issuer symbol: DUOL
Transactions as of: 17 Feb 2026
Net transactions value: -$6,038,255
Form type: 4
Filing time: 20 Feb 2026, 06:01:19 UTC
Previous filing: 03 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
von Ahn Luis	President & CEO, Co-Founder, Director, 10%+ Owner	C/O DUOLINGO, INC., 5900 PENN AVENUE, PITTSBURGH	/s/ Stephen Chen, as Attorney-in-Fact for Luis von Ahn	19 Feb 2026	0001829259

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	Performance-Based Restricted Stock Units	Options Exercise	$0	-120,000	-18%	$0.000000	540,000	17 Feb 2026	Class B Common Stock	120,000		Direct	F1, F2
transaction	DUOL	Class B Common Stock	Options Exercise	$0	+120,000	+3.7%	$0.000000	3,406,635	17 Feb 2026	Class A Common Stock	120,000		Direct	F3
transaction	DUOL	Class B Common Stock	Tax liability	$6,038,255	-53,640	-1.6%	$112.57	3,352,995	17 Feb 2026	Class A Common Stock	53,640		Direct	F3

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

Explanation of Responses:

Id	Content
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.
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.
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.