Key facts
- This page summarizes Luis von Ahn's Form 4 filing for Duolingo, Inc. (DUOL).
- 11 reported transactions and 3 derivative rows are listed below.
- Accepted by SEC: 17 Apr 2025, 16:06.
Luis von Ahn - 15 Apr 2025 Form 4 Insider Report for Duolingo, Inc. (DUOL)
- Reporting relationship
- President & CEO, Co-Founder, Director, 10%+ Owner
- Issuer ticker
- DUOL
- Reported as of
- 15 Apr 2025
- Net transaction value
- -$2,559,412
- SEC form
- 4
- Accepted by SEC
- 17 Apr 2025, 16:06:37 UTC
- Prior SEC filing
- 18 Mar 2025
- Next SEC filing
- 09 Jun 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Stephen Chen, as Attorney-in-Fact for Luis von Ahn
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Luis von Ahn filed Form 4 for Duolingo, Inc. (DUOL) on 17 Apr 2025.
Change
- Previous filing in this sequence was filed on 18 Mar 2025.
- Current net transaction value: -$2,559,412.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
DUOL
transaction
Class A Common Stock
Conversion of derivative security
- Transaction value
- $59,840
- Shares
- +8,000
- Change %
- Price
- $7.48
- Shares after
- 8,000
- Date
- 15 Apr 2025
- Ownership
- Direct
DUOL
transaction
Class A Common Stock
Sale
- Transaction value
- $164,112
- Shares
- -505
- Change %
- -6.3%
- Price
- $324.97
- Shares after
- 7,495
- Date
- 15 Apr 2025
- Ownership
- Direct
- Footnotes
- F1, F2
DUOL
transaction
Class A Common Stock
Sale
- Transaction value
- $606,681
- Shares
- -1,863
- Change %
- -25%
- Price
- $325.65
- Shares after
- 5,632
- Date
- 15 Apr 2025
- Ownership
- Direct
- Footnotes
- F1, F3
DUOL
transaction
Class A Common Stock
Sale
- Transaction value
- $365,457
- Shares
- -1,119
- Change %
- -20%
- Price
- $326.59
- Shares after
- 4,513
- Date
- 15 Apr 2025
- Ownership
- Direct
- Footnotes
- F1, F4
DUOL
transaction
Class A Common Stock
Sale
- Transaction value
- $524,439
- Shares
- -1,600
- Change %
- -35%
- Price
- $327.77
- Shares after
- 2,913
- Date
- 15 Apr 2025
- Ownership
- Direct
- Footnotes
- F1, F5
DUOL
transaction
Class A Common Stock
Sale
- Transaction value
- $760,325
- Shares
- -2,313
- Change %
- -79%
- Price
- $328.72
- Shares after
- 600
- Date
- 15 Apr 2025
- Ownership
- Direct
- Footnotes
- F1, F6
DUOL
transaction
Class A Common Stock
Sale
- Transaction value
- $132,060
- Shares
- -400
- Change %
- -67%
- Price
- $330.15
- Shares after
- 200
- Date
- 15 Apr 2025
- Ownership
- Direct
- Footnotes
- F1, F7
DUOL
transaction
Class A Common Stock
Sale
- Transaction value
- $66,179
- Shares
- -200
- Change %
- -100%
- Price
- $330.90
- Shares after
- 0
- Date
- 15 Apr 2025
- Ownership
- Direct
- Footnotes
- F1, F8
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
DUOL
transaction
Derivative
Stock Option (Right to Buy)
Options Exercise
- Transaction value
- $0
- Shares
- -8,000
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 15 Apr 2025
- Ownership
- Direct
- Underlying class
- Class B Common Stock
- Underlying amount
- 8,000
- Exercise price
- $7.48
- Footnotes
- F9
DUOL
transaction
Derivative
Class B Common Stock
Conversion of derivative security
- Transaction value
- $0
- Shares
- +8,000
- Change %
- +0.25%
- Price
- $0.000000
- Shares after
- 3,163,171
- Date
- 15 Apr 2025
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 8,000
- Exercise price
- Footnotes
- F10
DUOL
transaction
Derivative
Class B Common Stock
Conversion of derivative security
- Transaction value
- $0
- Shares
- -8,000
- Change %
- -0.25%
- Price
- $0.000000
- Shares after
- 3,155,171
- Date
- 15 Apr 2025
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 8,000
- Exercise price
- Footnotes
- F10
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Rule 10b5-1 trading plan
These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.
Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).
Explanation of responses 10 footnotes
Footnote F1
The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 12, 2024.
Footnote F2
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 $324.22 to $325.19, 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.
Footnote 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 $325.23 to $326.19, 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.
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 $326.23 to $327.22, 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.
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 $327.29 to $328.28, 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.
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 $328.35 to $329.33, 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.
Footnote F7
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 $329.58 to $330.40, 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.
Footnote F8
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 $330.79 to $331.00, 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.
Footnote F9
The shares subject to the option are fully vested and exercisable.
Footnote F10
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.