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

RH CHAIN…
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
01Overview02Follow the Money03Daily Brief04Live05Congress06Corporate Insiders07Government Money08Political Influence09Institutions10Washington Network11Follow the Power12Disclosure Clock13AI Investigator14Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 42h ago
HOUSE PTR2h ago
SEC 13F2h ago
ROBINHOOD CHAIN2h ago
SEC FORM 4/Open-market saleVerified dataRule 10b5-1 plan

Hacker Severin sold DUOL

Director, Chief Tech Officer, Co-Founder, 10% Owner · Duolingo, Inc. · Class A Common Stock

Side
SELL
Value
$460K
Shares
1,727
Price
$266.12
Executed
Nov 4, 2025
Disclosed
Nov 6, 2025
Disclosure timeline2 days from execution to publication · legal deadline 2 business days
Nov 4 executedNov 6, 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
23/ 100 · ROUTINE
Methodology →
  • Transaction type+6 / 20

    Open-market sale

  • Relative size+19 / 25

    $460K reported value · 58.7% of prior position

  • Filing timing0 / 15

    Disclosed 2 business days 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

  • Pre-arranged plan-10

    Executed under a Rule 10b5-1 trading plan

    • 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$182K
    1,326 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$97K
    700 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

    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

    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

    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
    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
    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
    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

    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

    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

    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
    0001628280-25-050203
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Nov 4, 2025
    Published
    Nov 6, 2025
    Ingested by INSIDER
    Nov 5, 04:34 UTC
    Last re-read
    Nov 5, 04:34 UTC

    Extracted facts

    Filer
    Hacker Severin
    Role
    Director, Chief Tech Officer, Co-Founder, 10% Owner
    Transaction
    Open-market saleAs filed: “S”
    Asset
    Duolingo, Inc.
    Ticker
    DUOL
    Shares
    1,727
    Price per share
    $266.12
    Value
    $459,594
    Execution date (reported)
    Nov 4, 2025
    Owned after transaction
    1,217 shares
    Rule 10b5-1 plan
    Yes, as checked by the filer
    Days from execution to publication
    2

    Calculation

    Value = shares × reported price per share

    • Shares: 1,727
    • Price: $266.1228

    = $459,594

    What this establishes

    Hacker Severin filed this Form 4 reporting a open-market sale of DUOL on Nov 4, 2025. It became public on Nov 6, 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
    Director, Chief Tech Officer, Co-Founder, 10% Owner
    Hacker Severincik:0001870272
    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.