INSIDER
01Overview02Daily Brief03Live04Congress05Corporate Insiders06Government Money07Political Influence08Institutions09Washington Network10Follow the Power11Disclosure Clock12AI Investigator13Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenMethodologyMatch reviewLaunch readiness
Data sources

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

RH CHAIN…
OverviewDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenMethodologyMatch reviewLaunch readiness
01Overview02Daily Brief03Live04Congress05Corporate Insiders06Government Money07Political Influence08Institutions09Washington Network10Follow the Power11Disclosure Clock12AI Investigator13Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenMethodologyMatch reviewLaunch readiness
OverviewDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 43h ago
HOUSE PTR3h ago
SEC 13F3h ago
ROBINHOOD CHAIN3h ago
SEC FORM 4/Open-market saleVerified dataRule 10b5-1 plan

Lie Sean sold CBRS

Chief Technology Officer · Cerebras Systems Inc. · Class A Common Stock

Side
SELL
Value
$5.24M
Shares
45.4K
Price
$115.46
Executed
Oct 27, 2026
Disclosed
Oct 28, 2026
Disclosure timeline1 days from execution to publication · legal deadline 2 business days
Oct 27 executedOct 28, 2026 disclosed

CBRS · 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
11/ 100 · ROUTINE
Methodology →
  • Transaction type+6 / 20

    Open-market sale

  • Relative size+14 / 25

    $5.2M reported value · 14.7% of prior position

  • Filing timing0 / 15

    Disclosed 1 business day after execution (deadline: 2)

  • Historical behavior+1 / 15

    Routine: 9 prior trades recorded 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 · CBRS

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    15
    0xc213…6c95Wallet
    CBRSCerebras Systems Inc.
    Token transfer
    		TRANSFER$35K
    379 sh
    		Nov 4, 2026Nov 4, 22:15 UTC
    traded Nov 4, 2026
    		onchainROBINHOOD CHAIN

    Evidence

    15
    0xc584…e616Wallet
    CBRSCerebras Systems Inc.
    Token transfer
    		TRANSFER$35K
    379 sh
    		Nov 4, 2026Nov 4, 22:12 UTC
    traded Nov 4, 2026
    		onchainROBINHOOD CHAIN

    Evidence

    17
    0xc584…e616Wallet
    CBRSCerebras Systems Inc.
    Mint
    		BUY$35K
    379 sh
    		Nov 4, 2026Nov 4, 22:12 UTC
    traded Nov 4, 2026
    		onchainROBINHOOD CHAIN

    Evidence

    0
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$11K
    100 sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    0
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Option exercise · 10b5-1 plan
    		M—
    28.9K sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    0
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Option exercise · 10b5-1 plan
    		M—
    3,125 sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    0
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Option exercise · 10b5-1 plan
    		M—
    32.0K sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    0
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    32.0K sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    0
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    32.0K sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    0
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Gift · 10b5-1 plan
    		G—
    18.0K sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    7
    LS
    Lie SeanChief Technology Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$1.69M
    14.5K sh
    		Oct 27, 2026Oct 28, 2026
    traded Oct 27, 2026
    		+1dSEC FORM 4

    Evidence

    33
    MD
    Mallick DhirajChief Operating Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$8.64M
    41.3K sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC FORM 4

    Evidence

    33
    MD
    Mallick DhirajChief Operating Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$4.32M
    20.7K sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC FORM 4

    Evidence

    33
    MD
    Mallick DhirajChief Operating Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$5.61M
    27.5K sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC FORM 4

    Evidence

    29
    MD
    Mallick DhirajChief Operating Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$1.14M
    5,637 sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC FORM 4

    Evidence

    33
    MD
    Mallick DhirajChief Operating Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$3.38M
    17.0K sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC FORM 4

    Evidence

    33
    MD
    Mallick DhirajChief Operating Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$1.30M
    6,613 sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC FORM 4

    Evidence

    0
    MD
    Mallick DhirajChief Operating Officer
    CBRSCerebras Systems Inc.
    Option exercise · 10b5-1 plan
    		M—
    276.0K sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC FORM 4

    Evidence

    30
    PY
    Patel YagneshChief Accounting Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$270K
    1,320 sh
    		Sep 28, 2026Sep 30, 2026
    traded Sep 28, 2026
    		+2dSEC FORM 4

    Evidence

    27
    KP
    Komin Robert Patrick Jr.Chief Financial Officer
    CBRSCerebras Systems Inc.
    Open-market sale · 10b5-1 plan
    		SELL$226K
    1,130 sh
    		Sep 29, 2026Sep 30, 2026
    traded Sep 29, 2026
    		+1dSEC 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
    0001628280-26-067978
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Oct 27, 2026
    Published
    Oct 28, 2026
    Ingested by INSIDER
    Nov 5, 02:09 UTC
    Last re-read
    Nov 5, 02:09 UTC

    Extracted facts

    Filer
    Lie Sean
    Role
    Chief Technology Officer
    Transaction
    Open-market saleAs filed: “S”
    Asset
    Cerebras Systems Inc.
    Ticker
    CBRS
    Shares
    45.4K
    Price per share
    $115.46
    Value
    $5,241,884
    Execution date (reported)
    Oct 27, 2026
    Owned after transaction
    263.7K shares
    Rule 10b5-1 plan
    Yes, as checked by the filer
    Days from execution to publication
    1

    Calculation

    Value = shares × reported price per share

    • Shares: 45.4K
    • Price: $115.46

    = $5,241,884

    What this establishes

    Lie Sean filed this Form 4 reporting a open-market sale of CBRS on Oct 27, 2026. It became public on Oct 28, 2026. 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
    Chief Technology Officer
    Lie Seancik:0002132472
    Issuer
    Cerebras Systems Inc.cik:0002021728

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    • Quarterly report (10-Q)10-QAug 12, 2026
    • Results of operations (earnings)8-KAug 12, 2026
    • Quarterly report (10-Q)10-QJun 24, 2026
    • Results of operations (earnings)8-KJun 23, 2026
    • Other material event8-KMay 15, 2026