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BLLN insider trading — BillionToOne, Inc.

No open-market insider purchases or sales were filed for BillionToOne, Inc. (BLLN) in the last 90 days. Other insider transactions — such as stock awards, option exercises or tax withholding — are listed below.

Updated Oct 16, 2026.

Insider buying · 90d
$0
Insider selling · 90d
$0
Net · 90d
$0
Last 30 days
0B / 0S

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Recent BLLN insider transactions

Every Form 4 filed by BillionToOne, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.

Trade dateInsiderRoleTypeOwnershipSharesPriceValueFiling
Oct 12, 2026Atay OguzhanChairman and CEOM · Option exercise · 10b5-1Direct16,667$2.80$47KForm 4
Oct 12, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Direct16,667$93.79$1.56MForm 4
Oct 12, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Indirect2,667$97.61$260KForm 4
Oct 8, 2026Lynch Thomas P.See RemarksM · Option exerciseDirect8,000$8.65$69KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerM · Option exercise · 10b5-1Direct20,000$2.80$56KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerS · Sale · 10b5-1Direct20,000$108.15$2.16MForm 4
Oct 5, 2026Ten Bosch John RoderickSVP of Laboratory OperationsS · Sale · 10b5-1Direct2,834$105.15$298KForm 4
Sep 28, 2026Atay OguzhanChairman and CEOM · Option exercise · 10b5-1Direct8,333$2.80$23KForm 4
Sep 28, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Direct8,333$120.64$1.01MForm 4
Sep 28, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Indirect2,666$120.64$322KForm 4
Sep 24, 2026Tsao DavidChief Technology OfficerM · Option exercise · 10b5-1Direct3,333$2.80$9KForm 4
Sep 24, 2026Tsao DavidChief Technology OfficerS · Sale · 10b5-1Direct3,333$125.00$417KForm 4
Sep 24, 2026Ten Bosch John RoderickSVP of Laboratory OperationsS · Sale · 10b5-1Direct1,416$120.00$170KForm 4
Sep 21, 2026Ten Bosch John RoderickSVP of Laboratory OperationsS · Sale · 10b5-1Direct1,416$106.61$151KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksM · Option exercise · 10b5-1Direct35,112$13.61$478KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksS · Sale · 10b5-1Direct35,112$110.33$3.87MForm 4
Sep 14, 2026Atay OguzhanChairman and CEOM · Option exercise · 10b5-1Direct24,999$2.80$70KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Direct24,999$100.32$2.51MForm 4
Sep 14, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Indirect5,332$98.00$523KForm 4
Sep 10, 2026Sakakibara Shan RikuChief Product OfficerG · GiftDirect3,500——Form 4
Sep 9, 2026Ten Bosch John RoderickSVP of Laboratory OperationsS · Sale · 10b5-1Direct1,416$97.54$138KForm 4
Sep 9, 2026Tsao DavidChief Technology OfficerM · Option exercise · 10b5-1Direct20,000$2.80$56KForm 4
Sep 9, 2026Tsao DavidChief Technology OfficerS · Sale · 10b5-1Direct20,000$98.77$1.98MForm 4
Sep 9, 2026Atay OguzhanChairman and CEOG · GiftDirect20,000——Form 4
Sep 8, 2026Lynch Thomas P.See RemarksM · Option exercise · 10b5-1Direct20,000$13.61$272KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksS · Sale · 10b5-1Direct20,000$99.99$2.00MForm 4
Sep 8, 2026Atay OguzhanChairman and CEOC · ConversionDirect20,000——Form 4
Sep 8, 2026Tsao DavidChief Technology OfficerG · GiftDirect20,000——Form 4
Sep 3, 2026Tsao DavidChief Technology OfficerC · ConversionDirect20,000——Form 4
Aug 26, 2026Kolluri Krishna KittuDirectorJ · OtherIndirect484,442——Form 4
Aug 26, 2026Kolluri Krishna KittuDirectorJ · OtherIndirect78,244——Form 4
Aug 25, 2026Tsao DavidChief Technology OfficerM · Option exercise · 10b5-1Direct10,000$2.80$28KForm 4
Aug 25, 2026Tsao DavidChief Technology OfficerS · Sale · 10b5-1Direct10,000$100.00$1.00MForm 4
Aug 25, 2026Ten Bosch John RoderickSVP of Laboratory OperationsS · Sale · 10b5-1Direct1,417$100.00$142KForm 4
Aug 10, 2026Ten Bosch John RoderickSVP of Laboratory OperationsS · Sale · 10b5-1Direct1,417$92.86$132KForm 4
Aug 10, 2026Tsao DavidChief Technology OfficerM · Option exercise · 10b5-1Direct10,000$2.80$28KForm 4
Aug 10, 2026Tsao DavidChief Technology OfficerS · Sale · 10b5-1Direct10,000$92.86$929KForm 4
Aug 5, 2026Atay OguzhanChairman and CEOM · Option exercise · 10b5-1Direct15,539$2.80$44KForm 4
Aug 5, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Direct15,539$150.03$2.33MForm 4
Aug 3, 2026Atay OguzhanChairman and CEOM · Option exercise · 10b5-1Direct32,500$2.80$91KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Direct32,500$136.95$4.45MForm 4
Aug 3, 2026Atay OguzhanChairman and CEOS · Sale · 10b5-1Indirect12,500$137.37$1.72MForm 4
Jul 31, 2026Sakakibara Shan RikuChief Product OfficerS · Sale · 10b5-1Direct4,000$140.21$561KForm 4
Jul 16, 2026Johnson Nancy JoannSee RemarksS · Sale · 10b5-1Direct14,199$128.29$1.82MForm 4

BLLN insider trading FAQ

Are insiders buying BLLN stock?

Not on the open market. In the last 90 days, BillionToOne, Inc. insiders made no open-market purchases, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).

Who are the insiders trading BLLN?

No insider bought or sold on the open market in the last 90 days.

Where does BLLN insider trading data come from?

Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.

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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.