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sellModerate cluster of 510b5-1 plan

Severin Hacker sold $5.2M of DUOL

Chief Tech Officer, Co-Founder at Duolingo, Inc.. 10,000 shares at an average of $524.70, traded May 19, 2025, filed May 20, 2025.

Warning score
40
Value
$5.2M
10,000 shares
Holdings after
72
-99% from before
From 52-week low
+133%
low $223.18, close $520.23
From 52-week high
-4%
high $540.68, as of May 19, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $5.2M at market
    +25
  • Share of holdings sold
    Sold 99% of holdings
    +20
  • Cluster
    5 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

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.

DUOLOct 9, 2026 · close 149.92
Since filing May 20, 2025: -71.5%SPY +33.5% · excess -105.0%

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 0001562088-25-000119, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
May 19, 2025CConversion
Class A Common Stock10b5-1
+10,000$38.08$381k10,072May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-100$517.74$52k9,972May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,509$519.78$784k8,463May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-300$521.11$156k8,163May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-874$522.05$456k7,289May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-517$523.07$270k6,772May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-700$524.58$367k6,072May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-2,000$525.57$1.1M4,072May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,700$526.61$895k2,372May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,600$527.63$844k772May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-600$528.43$317k172May 20, 2025
May 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-100$530.64$53k72May 20, 2025
May 19, 2025MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-10,000$0.00$0125,252May 20, 2025
May 19, 2025CConversion
Class B Common Stockderivative10b5-1
+10,000$0.00$096,075May 20, 2025
May 19, 2025CConversion
Class B Common Stockderivative10b5-1
-10,000$0.00$086,075May 20, 2025

Related signals

Other insiders at Duolingo, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
35Weak
DUOLsell10b5-1
Duolingo, Inc.
Luis von Ahn
President & CEO, Co-Founder
$17M
110,046 shares
-100%
43Moderate
DUOLsell 210b5-1
Duolingo, Inc.
Luis von Ahn
President & CEO, Co-Founder
$7.0M
46,682 shares
-100%
50Moderate
DUOLsell 310b5-1
Duolingo, Inc.
Luis von Ahn
President & CEO, Co-Founder
$6.2M
40,980 shares
-110%
50Moderate
DUOLsell 310b5-1
Duolingo, Inc.
Luis von Ahn
President & CEO, Co-Founder
$4.3M
28,292 shares
-100%
40Moderate
DUOLsell 310b5-1
Duolingo, Inc.
Stephen C. Chen
General Counsel
$1.2M
8,072 shares
-16%
40Moderate
DUOLsell 310b5-1
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
DUOLsell 410b5-1
Duolingo, Inc.
Stephen C. Chen
General Counsel
$314k
2,797 shares
-8%
29Weak
DUOLsell 410b5-1
Duolingo, Inc.
Natalie Glance
Chief Engineering Officer
$594k
5,286 shares
-4%
42Moderate
DUOLsell 410b5-1
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.