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Data sources

Public disclosures only. Scores flag unusual patterns and are not evidence of wrongdoing. Not investment advice.

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OverviewFollow the MoneyDaily BriefLiveCongressDirectoryCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodology
01Overview02Follow the Money03Daily Brief04Live05Congress06Directory07Corporate Insiders08Government Money09Political Influence10Institutions11Washington Network12Follow the Power13Disclosure Clock14AI Investigator15Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodology
OverviewFollow the MoneyDaily BriefLiveCongressDirectoryCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodology
Data sources
SEC FORM 46m ago
HOUSE PTR6m ago
SEC 13F6m ago
ROBINHOOD CHAIN6m ago
SEC FORM 4/Option exerciseVerified data

Chen Stephen C. reported DUOL

General Counsel · Duolingo, Inc. · Class A Common Stock

Side
M
Value
$26K
Shares
1,800
Price
$14.42
Executed
Dec 29, 2025
Disclosed
Dec 30, 2025
Disclosure timeline1 days from execution to publication · legal deadline 2 business days
Dec 29 executedDec 30, 2025 disclosed

DUOL · daily

Yahoo Finance chart API
▲Execution▼Disclosure●Material company filing●Other disclosed buy●Other disclosed sellUnofficial public endpoint; daily OHLCV, split-adjusted. Replace with a licensed feed for production.

Insider Score

Experimental signal
13/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Option exercise — administrative, little informational value

  • Relative size+5 / 25

    $26K reported value · 5.7% of prior position

  • Filing timing0 / 15

    Disclosed 1 business day after execution (deadline: 2)

  • Historical behavior+8 / 15

    First recorded trade by this actor in this security

  • Frequency & clustering0 / 15

    No clustered activity in the dataset

  • Market events0 / 10

    No material company filing within 60 days after the trade

    • The Insider Score measures how far a disclosure deviates from normal filing patterns. A high score is a prompt for research, not evidence of illegal insider trading.

    Other disclosed activity · DUOL

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    20
    CC
    Chen Stephen C.General Counsel
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$648K
    3,700 sh
    		Nov 4, 2026Nov 5, 2026
    traded Nov 4, 2026
    		+1dSEC FORM 4

    Evidence

    13
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$240K
    1,759 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    13
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$190K
    1,374 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    13
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$182K
    1,326 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    10
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$40K
    300 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    10
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$40K
    300 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    10
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$40K
    300 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    13
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$97K
    700 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    20
    GB
    Gordon William BDirector
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$534K
    3,941 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    9
    BA
    Bohutinsky AmyDirector
    DUOLDuolingo, Inc.
    Grant or award
    		A$16K
    108 sh
    		Oct 10, 2026Oct 13, 2026
    traded Oct 10, 2026
    		+3dSEC FORM 4

    Evidence

    9
    SM
    Schlosser MarioDirector
    DUOLDuolingo, Inc.
    Grant or award
    		A$17K
    116 sh
    		Oct 10, 2026Oct 13, 2026
    traded Oct 10, 2026
    		+3dSEC FORM 4

    Evidence

    9
    SH
    Shelton James HDirector
    DUOLDuolingo, Inc.
    Grant or award
    		A$15K
    100 sh
    		Oct 10, 2026Oct 13, 2026
    traded Oct 10, 2026
    		+3dSEC FORM 4

    Evidence

    9
    LO
    Lilly III John OsborneDirector
    DUOLDuolingo, Inc.
    Grant or award
    		A$15K
    98 sh
    		Oct 10, 2026Oct 13, 2026
    traded Oct 10, 2026
    		+3dSEC FORM 4

    Evidence

    0
    VL
    von Ahn LuisDirector, President & CEO, Co-Founder, 10% Owner
    DUOLDuolingo, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    110.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    16
    VL
    von Ahn LuisDirector, President & CEO, Co-Founder, 10% Owner
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$784K
    5,114 sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    11
    VL
    von Ahn LuisDirector, President & CEO, Co-Founder, 10% Owner
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$3.02M
    20.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    1
    VL
    von Ahn LuisDirector, President & CEO, Co-Founder, 10% Owner
    DUOLDuolingo, Inc.
    Derivative conversion · 10b5-1 plan
    		C$4.19M
    110.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    19
    VL
    von Ahn LuisDirector, President & CEO, Co-Founder, 10% Owner
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$4.55M
    29.9K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    19
    VL
    von Ahn LuisDirector, President & CEO, Co-Founder, 10% Owner
    DUOLDuolingo, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$8.34M
    55.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    0
    VL
    von Ahn LuisDirector, President & CEO, Co-Founder, 10% Owner
    DUOLDuolingo, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    110.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    Evidence

    Verified data

    Read directly from the primary public document; every field below is as reported by the filer.

    Source

    Document
    SEC Form 4
    Publisher
    U.S. Securities and Exchange Commission (EDGAR)
    Document ID
    0001628280-25-059129
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Dec 29, 2025
    Published
    Dec 30, 2025
    Ingested by INSIDER
    Nov 5, 04:25 UTC
    Last re-read
    Nov 5, 04:25 UTC

    Extracted facts

    Filer
    Chen Stephen C.
    Role
    General Counsel
    Transaction
    Option exerciseAs filed: “M”
    Asset
    Duolingo, Inc.
    Ticker
    DUOL
    Shares
    1,800
    Price per share
    $14.42
    Value
    $25,956
    Execution date (reported)
    Dec 29, 2025
    Owned after transaction
    33.3K shares
    Days from execution to publication
    1

    Calculation

    Value = shares × reported price per share

    • Shares: 1,800
    • Price: $14.42

    = $25,956

    What this establishes

    Chen Stephen C. filed this Form 4 reporting a option exercise of DUOL on Dec 29, 2025. It became public on Dec 30, 2025. The filing establishes the reported transaction and the filer's stated role. It does not establish why the trade was made or what the filer knew.

    Extraction

    Method
    Form 4 XML
    Confidence
    1.00
    General Counsel
    Chen Stephen C.cik:0001869758
    Issuer
    Duolingo, Inc.cik:0001562088

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.