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sellModerate cluster of 610b5-1 plan

Severin Hacker sold $4.3M of DUOL

Chief Tech Officer, Co-Founder at Duolingo, Inc.. 10,000 shares at an average of $433.94, traded Feb 19, 2025, filed Feb 21, 2025.

Warning score
40
Value
$4.3M
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
    $4.3M 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.

This signal so far: 1m -19.7%, 3m +35.0%, 6m -13.9%.

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 21, 2025: -61.1%SPY +32.3% · excess -93.4%

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 0001562088-25-000033, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Feb 19, 2025CConversion
Class A Common Stock10b5-1
+10,000$14.42$144k10,072Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-556$430.37$239k9,516Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-826$431.19$356k8,690Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-809$432.37$350k7,881Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-2,702$433.22$1.2M5,179Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-2,307$434.20$1.0M2,872Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,562$435.46$680k1,310Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-538$436.52$235k772Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-400$437.80$175k372Feb 21, 2025
Feb 19, 2025SOpen-market sale
Class A Common Stock10b5-1
-300$438.98$132k72Feb 21, 2025
Feb 19, 2025MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-10,000$0.00$010,252Feb 21, 2025
Feb 19, 2025CConversion
Class B Common Stockderivative10b5-1
+10,000$0.00$096,075Feb 21, 2025
Feb 19, 2025CConversion
Class B Common Stockderivative10b5-1
-10,000$0.00$086,075Feb 21, 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%
41Moderate
DUOLsell 3
Duolingo, Inc.
Stephen C. Chen
General Counsel
$132k
1,024 shares
-2%
41Moderate
DUOLsell 3
Duolingo, Inc.
Robert Meese
Chief Business Officer
$175k
1,354 shares
-1%
29Weak
DUOLsell 310b5-1
Duolingo, Inc.
Natalie Glance
Chief Engineering Officer
$567k
4,290 shares
-2%
24Weak
DUOLsell 310b5-1
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.

Severin Hacker sold $4.3M of DUOL | InsiderTell