Severin Hacker sold $2.9M of DUOL
Chief Tech Officer, Co-Founder at Duolingo, Inc.. 10,000 shares at an average of $288.94, traded Sep 19, 2025, filed Sep 22, 2025.
Score components
- +15RoleOfficer
- +25Trade size$2.9M at market
- +20Share of holdings soldSold 99% of holdings
- +8Cluster2 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001628280-25-042323, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 19, 2025 | CConversion Class A Common Stock10b5-1 | +10,000 | $38.08 | $381k | 10,072 | Sep 22, 2025 |
| Sep 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,300 | $286.77 | $373k | 8,772 | Sep 22, 2025 |
| Sep 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -2,300 | $287.81 | $662k | 6,472 | Sep 22, 2025 |
| Sep 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -2,300 | $288.81 | $664k | 4,172 | Sep 22, 2025 |
| Sep 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,900 | $289.79 | $551k | 2,272 | Sep 22, 2025 |
| Sep 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -2,200 | $290.78 | $640k | 72 | Sep 22, 2025 |
| Sep 19, 2025 | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -10,000 | $0.00 | $0 | 45,252 | Sep 22, 2025 |
| Sep 19, 2025 | CConversion Class B Common Stockderivative10b5-1 | +10,000 | $0.00 | $0 | 96,075 | Sep 22, 2025 |
| Sep 19, 2025 | CConversion Class B Common Stockderivative10b5-1 | -10,000 | $0.00 | $0 | 86,075 | Sep 22, 2025 |
Related signals
Other insiders at Duolingo, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 35Weak | Duolingo, Inc. | Luis von Ahn President & CEO, Co-Founder | $17M 110,046 shares | -100% | |
| 43Moderate | Duolingo, Inc. | Luis von Ahn President & CEO, Co-Founder | $7.0M 46,682 shares | -100% | |
| 50Moderate | Duolingo, Inc. | Luis von Ahn President & CEO, Co-Founder | $6.2M 40,980 shares | -110% | |
| 50Moderate | Duolingo, Inc. | Luis von Ahn President & CEO, Co-Founder | $4.3M 28,292 shares | -100% | |
| 40Moderate | Duolingo, Inc. | Stephen C. Chen General Counsel | $1.2M 8,072 shares | -16% | |
| 40Moderate | Duolingo, Inc. | William B Gordon director | $1.5M 10,000 shares | -13% | |
| 40Moderate | Duolingo, Inc. | Severin Hacker Chief Tech Officer, Co-Founder | $1.7M 10,000 shares | -99% | |
| 28Weak | Duolingo, Inc. | Stephen C. Chen General Counsel | $494k 2,796 shares | -8% | |
| 33Weak | Duolingo, Inc. | Natalie Glance Chief Engineering Officer | $885k 5,005 shares | -4% | |
| 47Moderate | Duolingo, Inc. | Matthew Skaruppa Chief Financial Officer | $1.0M 5,858 shares | -14% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.