Skip to content
sellModerate cluster of 610b5-1 plan

Severin Hacker sold $3.9M of DUOL

Chief Tech Officer, Co-Founder at Duolingo, Inc.. 10,000 shares at an average of $391.46, traded Feb 5, 2025, filed Feb 6, 2025.

Warning score
40
Value
$3.9M
10,000 shares
Holdings after
72
-99% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    Officer
    +15
  • Trade size
    $3.9M at market
    +25
  • Share of holdings sold
    Sold 99% of holdings
    +20
  • Cluster
    6 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 Feb 6, 2025: -61.5%SPY +30.9% · excess -92.4%

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 0001562088-25-000016, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Feb 5, 2025CConversion
Class A Common Stock10b5-1
+10,000$0.00$010,072Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-300$386.68$116k9,772Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,422$388.01$552k8,350Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,513$388.96$589k6,837Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,405$389.91$548k5,432Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,109$391.01$434k4,323Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-3,453$392.14$1.4M870Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-100$395.05$40k770Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-200$402.52$81k570Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-198$405.97$80k372Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-200$407.27$81k172Feb 6, 2025
Feb 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-100$409.40$41k72Feb 6, 2025
Feb 5, 2025MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-10,000$0.00$020,252Feb 6, 2025
Feb 5, 2025CConversion
Class B Common Stockderivative10b5-1
+10,000$0.00$096,075Feb 6, 2025
Feb 5, 2025CConversion
Class B Common Stockderivative10b5-1
-10,000$0.00$086,075Feb 6, 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%
35Weak
DUOLsell 510b5-1
Duolingo, Inc.
Robert Meese
Chief Business Officer
$1.7M
5,351 shares
-4%
40Moderate
DUOLsell 610b5-1
Duolingo, Inc.
Severin Hacker
Chief Tech Officer, Co-Founder
$3.0M
10,000 shares
-99%
40Moderate
DUOLsell 510b5-1
Duolingo, Inc.
Gillian Munson
director
$1.6M
5,000 shares
-59%
50Moderate
DUOLsell 610b5-1
Duolingo, Inc.
Luis von Ahn
President & CEO, Co-Founder
$2.4M
8,000 shares
-100%

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 $3.9M of DUOL | InsiderTell