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sellWeak cluster of 210b5-1 plan

Severin Hacker sold $5.3M of DUOL

Chief Tech Officer, Co-Founder at Duolingo, Inc.. 10,000 shares at an average of $525.10, traded Jun 5, 2025, filed Jun 9, 2025.

Warning score
33
Value
$5.3M
10,000 shares
Holdings after
72
-99% from before
From 52-week low
+134%
low $223.18, close $522.99
From 52-week high
-3%
high $540.68, as of Jun 5, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $5.3M at market
    +25
  • Share of holdings sold
    Sold 99% of holdings
    +20
  • Cluster
    2 insiders selling within 14 days
    +8
  • 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 Jun 9, 2025: -69.9%SPY +32.0% · excess -101.9%

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 0001562088-25-000123, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 5, 2025CConversion
Class A Common Stock10b5-1
+10,000$38.08$381k10,072Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-300$519.15$156k9,772Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-200$520.05$104k9,572Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-500$521.60$261k9,072Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-996$522.77$521k8,076Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-2,804$523.78$1.5M5,272Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,200$524.92$630k4,072Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-500$525.95$263k3,572Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,400$526.86$738k2,172Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-900$527.85$475k1,272Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-600$529.01$317k672Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-500$530.09$265k172Jun 9, 2025
Jun 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-100$531.12$53k72Jun 9, 2025
Jun 5, 2025MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-10,000$0.00$0115,252Jun 9, 2025
Jun 5, 2025CConversion
Class B Common Stockderivative10b5-1
+10,000$0.00$096,075Jun 9, 2025
Jun 5, 2025CConversion
Class B Common Stockderivative10b5-1
-10,000$0.00$086,075Jun 9, 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%
25Weak
DUOLsell10b5-1
Duolingo, Inc.
Severin Hacker
Chief Tech Officer, Co-Founder
$2.9M
10,000 shares
-99%
40Moderate
DUOLsell 310b5-1
Duolingo, Inc.
Severin Hacker
Chief Tech Officer, Co-Founder
$2.7M
10,000 shares
-99%
28Weak
DUOLsell 510b5-1
Duolingo, Inc.
Stephen C. Chen
General Counsel
$487k
1,515 shares
-4%
32Weak
DUOLsell 510b5-1
Duolingo, Inc.
Matthew Skaruppa
Chief Financial Officer
$3.5M
10,937 shares
-20%

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.

Severin Hacker sold $5.3M of DUOL | InsiderTell