Severin Hacker sold $3.4M of DUOL
Chief Tech Officer, Co-Founder at Duolingo, Inc.. 10,000 shares at an average of $344.56, traded Aug 19, 2025, filed Aug 21, 2025.
Score components
- +15RoleOfficer
- +25Trade size$3.4M at market
- +20Share of holdings soldSold 99% of holdings
- +15Cluster5 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 0001562088-25-000189, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 19, 2025 | CConversion Class A Common Stock10b5-1 | +10,000 | $38.08 | $381k | 10,072 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,003 | $339.15 | $340k | 9,069 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,700 | $340.03 | $578k | 7,369 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,979 | $340.92 | $675k | 5,390 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,318 | $342.00 | $451k | 4,072 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -300 | $343.82 | $103k | 3,772 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -300 | $345.02 | $104k | 3,472 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -600 | $346.15 | $208k | 2,872 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -500 | $347.48 | $174k | 2,372 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -400 | $348.83 | $140k | 1,972 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -100 | $349.28 | $35k | 1,872 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -400 | $351.29 | $141k | 1,472 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -200 | $352.40 | $70k | 1,272 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -300 | $354.08 | $106k | 972 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -400 | $354.89 | $142k | 572 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -100 | $357.67 | $36k | 472 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -200 | $359.30 | $72k | 272 | Aug 21, 2025 |
| Aug 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -200 | $363.05 | $73k | 72 | Aug 21, 2025 |
| Aug 19, 2025 | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -10,000 | $0.00 | $0 | 65,252 | Aug 21, 2025 |
| Aug 19, 2025 | CConversion Class B Common Stockderivative10b5-1 | +10,000 | $0.00 | $0 | 96,075 | Aug 21, 2025 |
| Aug 19, 2025 | CConversion Class B Common Stockderivative10b5-1 | -10,000 | $0.00 | $0 | 86,075 | Aug 21, 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% | |
| 61Notable | DUOLbuy Duolingo, Inc. | James H Shelton director | $499k 5,000 shares | +108% | |
| 24Weak | Duolingo, Inc. | Stephen C. Chen General Counsel | $314k 2,797 shares | -8% | |
| 29Weak | Duolingo, Inc. | Natalie Glance Chief Engineering Officer | $594k 5,286 shares | -4% | |
| 42Moderate | Duolingo, Inc. | Matthew Skaruppa Chief Financial Officer | $658k 5,856 shares | -16% |
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.