Hacker Severin's Form 4 filing
Duolingo, Inc.DUOL · filed Oct 22, 2025
- Accession no.
- 0001628280-25-045963
- Filed
- Oct 22, 2025
- Trade date
- Oct 20, 2025
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 16 non-derivative transactions and 6 derivative transactions. Open-market sales total $3.15M. It was filed 2 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Hacker SeverinCIK 0001870272 | Director, Officer (Chief Tech Officer, Co-Founder), 10% Owner |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Oct 20, 2025 | Class A Common Stock | CConversionAcquired | +10,000 | $38.08 | +$380,800 | 10,072 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −100 | $305.86 | −$30,586 | 9,972 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −600 | $307.55F2 | −$184,530 | 9,372 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −500 | $309.06F3 | −$154,530 | 8,872 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −632 | $309.94F4 | −$195,882.08 | 8,240 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −1,000 | $311.43F5 | −$311,430 | 7,240 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −1,281 | $312.37F6 | −$400,145.97 | 5,959 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −500 | $313.93F7 | −$156,965 | 5,459 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −1,100 | $315.79F8 | −$347,369 | 4,359 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −1,600 | $316.64F9 | −$506,624 | 2,759 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −680 | $317.68F10 | −$216,022.4 | 2,079 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −907 | $318.73F11 | −$289,088.11 | 1,172 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −300 | $319.97F12 | −$95,991 | 872 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −400 | $321.75F13 | −$128,700 | 472 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −300 | $323.09F14 | −$96,927 | 172 | Direct | |
| Oct 20, 2025 | Class A Common Stock | SSaleDisposed | −100 | $324.10 | −$32,410 | 72 | Direct |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Oct 20, 2025 | Class B Common Stock | MOption exerciseDisposed | −10,000 | $0.00 | $0 | 25,252 | Direct | |
| Oct 20, 2025 | Class A Common Stock | CConversionAcquired | +10,000 | $0.00 | $0 | 96,075 | Direct | |
| Oct 20, 2025 | Class A Common Stock | CConversionDisposed | −10,000 | $0.00 | $0 | 86,075 | Direct | |
| Oct 20, 2025 | Class B Common Stock | MOption exerciseDisposed | −60,000 | $0.00 | $0 | 390,000 | Direct | |
| Oct 20, 2025 | Class A Common Stock | MOption exerciseAcquired | +60,000 | $0.00 | $0 | 146,075 | Direct | |
| Oct 20, 2025 | Class A Common Stock | FTax withholdingDisposed | −31,770 | $312.73 | −$9,935,432.1 | 114,305 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- 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 $307.18 to $307.89, 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.
Referenced by the price of 1 transaction in Table I.
- 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 $308.61 to $309.24, 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.
Referenced by the price of 1 transaction in Table I.
- 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 $309.71 to $310.18, 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.
Referenced by the price of 1 transaction in Table I.
- 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 $310.86 to $311.81, 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.
Referenced by the price of 1 transaction in Table I.
- 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 $311.94 to $312.65, 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.
Referenced by the price of 1 transaction in Table I.
- 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 $313.65 to $314.30, 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.
Referenced by the price of 1 transaction in Table I.
- 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 $315.18 to $316.17, 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.
Referenced by the price of 1 transaction in Table I.
- F9
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 $316.22 to $317.19, 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.
Referenced by the price of 1 transaction in Table I.
- F10
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 $317.22 to $318.20, 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.
Referenced by the price of 1 transaction in Table I.
- F11
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 $318.38 to $319.26, 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.
Referenced by the price of 1 transaction in Table I.
- F12
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 $319.85 to $320.21, 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.
Referenced by the price of 1 transaction in Table I.
- F13
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 $321.32 to $322.19, 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.
Referenced by the price of 1 transaction in Table I.
- F14
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 $322.98 to $323.25, 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.
Referenced by the price of 1 transaction in Table I.