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

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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 41h ago
HOUSE PTR1h ago
SEC 13F1h ago
ROBINHOOD CHAIN1h ago
SEC FORM 4/Open-market saleVerified dataRule 10b5-1 plan

Chen Sean Chihhsiang sold AMBQ

President and COO · Ambiq Micro, Inc. · Common Stock

Side
SELL
Value
$123K
Shares
2,126
Price
$57.68
Executed
Sep 4, 2026
Disclosed
Sep 9, 2026
Disclosure timeline5 days from execution to publication · legal deadline 2 business days
Sep 4 executedSep 9, 2026 disclosed

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

    Open-market sale

  • Relative size+4 / 25

    $123K reported value · 1.7% of prior position

  • Filing timing+6 / 15

    Disclosed 3 business days after execution (deadline: 2)

  • Historical behavior+4 / 15

    2 prior trades recorded in this security

  • Frequency & clustering+10 / 15

    2 other actors traded the same direction within 14 days

  • 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 · AMBQ

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    8
    EF
    Esaka FumihideDirector, Chief Executive Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$25K
    500 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    8
    CC
    Chen Sean ChihhsiangPresident and COO
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$11K
    200 sh
    		Oct 14, 2026Oct 16, 2026
    traded Oct 14, 2026
    		+2dSEC FORM 4

    Evidence

    8
    HM
    Hanson Scott McLeanDirector, Chief Technology Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$29K
    600 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    11
    EF
    Esaka FumihideDirector, Chief Executive Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$143K
    2,800 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    0
    CC
    Chen Sean ChihhsiangPresident and COO
    AMBQAmbiq Micro, Inc.
    Option exercise · 10b5-1 plan
    		M—
    15.0K sh
    		Oct 14, 2026Oct 16, 2026
    traded Oct 14, 2026
    		+2dSEC FORM 4

    Evidence

    11
    CC
    Chen Sean ChihhsiangPresident and COO
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$214K
    4,000 sh
    		Oct 14, 2026Oct 16, 2026
    traded Oct 14, 2026
    		+2dSEC FORM 4

    Evidence

    11
    HM
    Hanson Scott McLeanDirector, Chief Technology Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$189K
    3,700 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    8
    HM
    Hanson Scott McLeanDirector, Chief Technology Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$45K
    900 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    0
    EF
    Esaka FumihideDirector, Chief Executive Officer
    AMBQAmbiq Micro, Inc.
    Option exercise · 10b5-1 plan
    		M—
    5,000 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    11
    EF
    Esaka FumihideDirector, Chief Executive Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$62K
    1,200 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    0
    EF
    Esaka FumihideDirector, Chief Executive Officer
    AMBQAmbiq Micro, Inc.
    Option exercise · 10b5-1 plan
    		M$41K
    5,000 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    8
    EF
    Esaka FumihideDirector, Chief Executive Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$25K
    500 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    18
    CC
    Chen Sean ChihhsiangPresident and COO
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$378K
    7,539 sh
    		Oct 14, 2026Oct 16, 2026
    traded Oct 14, 2026
    		+2dSEC FORM 4

    Evidence

    11
    CC
    Chen Sean ChihhsiangPresident and COO
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$65K
    1,261 sh
    		Oct 14, 2026Oct 16, 2026
    traded Oct 14, 2026
    		+2dSEC FORM 4

    Evidence

    0
    HM
    Hanson Scott McLeanDirector, Chief Technology Officer
    AMBQAmbiq Micro, Inc.
    Option exercise · 10b5-1 plan
    		M—
    7,000 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    11
    HM
    Hanson Scott McLeanDirector, Chief Technology Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$93K
    1,800 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    0
    CC
    Chen Sean ChihhsiangPresident and COO
    AMBQAmbiq Micro, Inc.
    Option exercise · 10b5-1 plan
    		M$122K
    15.0K sh
    		Oct 14, 2026Oct 16, 2026
    traded Oct 14, 2026
    		+2dSEC FORM 4

    Evidence

    11
    CC
    Chen Sean ChihhsiangPresident and COO
    AMBQAmbiq Micro, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$105K
    2,000 sh
    		Oct 14, 2026Oct 16, 2026
    traded Oct 14, 2026
    		+2dSEC FORM 4

    Evidence

    0
    HM
    Hanson Scott McLeanDirector, Chief Technology Officer
    AMBQAmbiq Micro, Inc.
    Option exercise · 10b5-1 plan
    		M$57K
    7,000 sh
    		Oct 15, 2026Oct 16, 2026
    traded Oct 15, 2026
    		+1dSEC FORM 4

    Evidence

    24
    HM
    Hanson Scott McLeanDirector, Chief Technology Officer
    AMBQAmbiq Micro, Inc.
    Open-market sale
    		SELL$32K
    452 sh
    		Oct 2, 2026Oct 6, 2026
    traded Oct 2, 2026
    		+4dSEC 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
    0002078559-26-000008
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Sep 4, 2026
    Published
    Sep 9, 2026
    Ingested by INSIDER
    Nov 5, 02:18 UTC
    Last re-read
    Nov 5, 02:18 UTC

    Extracted facts

    Filer
    Chen Sean Chihhsiang
    Role
    President and COO
    Transaction
    Open-market saleAs filed: “S”
    Asset
    Ambiq Micro, Inc.
    Ticker
    AMBQ
    Shares
    2,126
    Price per share
    $57.68
    Value
    $122,625
    Execution date (reported)
    Sep 4, 2026
    Owned after transaction
    120.3K shares
    Rule 10b5-1 plan
    Yes, as checked by the filer
    Days from execution to publication
    5

    Calculation

    Value = shares × reported price per share

    • Shares: 2,126
    • Price: $57.6786

    = $122,625

    What this establishes

    Chen Sean Chihhsiang filed this Form 4 reporting a open-market sale of AMBQ on Sep 4, 2026. It became public on Sep 9, 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
    President and COO
    Chen Sean Chihhsiangcik:0002078559
    Issuer
    Ambiq Micro, Inc.cik:0001500412

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.