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

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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 43h ago
HOUSE PTR3h ago
SEC 13F3h ago
ROBINHOOD CHAIN3h ago
SEC FORM 4/Open-market saleVerified dataRule 10b5-1 plan

Atay Oguzhan sold BLLN

Director, Chairman and CEO · BillionToOne, Inc. · Class A Common Stock

Side
SELL
Value
$238K
Shares
2,553
Price
$93.05
Executed
Oct 12, 2026
Disclosed
Oct 14, 2026
Disclosure timeline2 days from execution to publication · legal deadline 2 business days
Oct 12 executedOct 14, 2026 disclosed

BLLN · 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
15/ 100 · ROUTINE
Methodology →
  • Transaction type+6 / 20

    Open-market sale

  • Relative size+8 / 25

    $238K reported value · 17.4% of prior position

  • Filing timing0 / 15

    Disclosed 2 business days after execution (deadline: 2)

  • Historical behavior+1 / 15

    Routine: 23 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 · BLLN

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    26
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$264K
    2,389 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    12
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$23K
    208 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    0
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Option exercise · 10b5-1 plan
    		M$28K
    10.0K sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    15
    TR
    ten Bosch John RoderickSVP of Laboratory Operations
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$160K
    1,417 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    8
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$11K
    100 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    19
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$70K
    633 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    18
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$251K
    2,320 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    0
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Option exercise · 10b5-1 plan
    		M$28K
    10.0K sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    8
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$2,603
    23 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    15
    TR
    ten Bosch John RoderickSVP of Laboratory Operations
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$160K
    1,417 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    18
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$353K
    3,241 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    8
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$34K
    300 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    22
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$266K
    2,450 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    22
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$353K
    3,234 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    0
    AO
    Atay OguzhanDirector, Chairman and CEO
    BLLNBillionToOne, Inc.
    Option exercise · 10b5-1 plan
    		M$23K
    8,334 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    19
    AO
    Atay OguzhanDirector, Chairman and CEO
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$225K
    2,075 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    20
    AO
    Atay OguzhanDirector, Chairman and CEO
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$46K
    411 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    14
    AO
    Atay OguzhanDirector, Chairman and CEO
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$302K
    2,667 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    23
    AO
    Atay OguzhanDirector, Chairman and CEO
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$245K
    2,223 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    11
    TD
    Tsao DavidDirector, Chief Technology Officer
    BLLNBillionToOne, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$98K
    917 sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 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
    0002070849-26-000072
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Oct 12, 2026
    Published
    Oct 14, 2026
    Ingested by INSIDER
    Nov 5, 02:11 UTC
    Last re-read
    Nov 5, 02:11 UTC

    Extracted facts

    Filer
    Atay Oguzhan
    Role
    Director, Chairman and CEO
    Transaction
    Open-market saleAs filed: “S”
    Asset
    BillionToOne, Inc.
    Ticker
    BLLN
    Shares
    2,553
    Price per share
    $93.05
    Value
    $237,546
    Execution date (reported)
    Oct 12, 2026
    Owned after transaction
    12.2K 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: 2,553
    • Price: $93.046

    = $237,546

    What this establishes

    Atay Oguzhan filed this Form 4 reporting a open-market sale of BLLN on Oct 12, 2026. It became public on Oct 14, 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
    Director, Chairman and CEO
    Atay Oguzhancik:0002088549
    Issuer
    BillionToOne, Inc.cik:0002070849

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.