Severin Hacker sold $1.7M of DUOL
Chief Tech Officer, Co-Founder at Duolingo, Inc.. 10,000 shares at an average of $172.74, traded Nov 19, 2025, filed Nov 20, 2025.
Score components
- +15RoleOfficer
- +25Trade size$1.7M 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.
This signal so far: 1m +10.7%, 3m -33.9%, 6m -37.1%.
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 0001628280-25-053427, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Nov 19, 2025 | CConversion Class A Common Stock10b5-1 | +10,000 | $38.08 | $381k | 10,072 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,146 | $169.57 | $194k | 8,926 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,000 | $170.55 | $171k | 7,926 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -2,009 | $171.50 | $345k | 5,917 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,281 | $172.39 | $221k | 4,636 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -760 | $173.74 | $132k | 3,876 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -3,089 | $174.61 | $539k | 787 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -435 | $175.46 | $76k | 352 | Nov 20, 2025 |
| Nov 19, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -280 | $176.68 | $49k | 72 | Nov 20, 2025 |
| Nov 19, 2025 | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -10,000 | $0.00 | $0 | 5,252 | Nov 20, 2025 |
| Nov 19, 2025 | CConversion Class B Common Stockderivative10b5-1 | +10,000 | $0.00 | $0 | 124,305 | Nov 20, 2025 |
| Nov 19, 2025 | CConversion Class B Common Stockderivative10b5-1 | -10,000 | $0.00 | $0 | 114,305 | Nov 20, 2025 |
Related signals
Other insiders at Duolingo, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| Pro nowfree Oct 16, 2026 | 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% | |
| 41Moderate | Duolingo, Inc. | Stephen C. Chen General Counsel | $132k 1,024 shares | -2% | |
| 41Moderate | Duolingo, Inc. | Robert Meese Chief Business Officer | $175k 1,354 shares | -1% | |
| 29Weak | Duolingo, Inc. | Natalie Glance Chief Engineering Officer | $567k 4,290 shares | -2% | |
| 24Weak | Duolingo, Inc. | Stephen C. Chen General Counsel | $317k 2,797 shares | -5% |
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.