MetaCap

BillionToOne Insider Trades

NASDAQ: BLLNHealth CareMedical SpecialitiesUSD

98.09+2.68 (+2.81%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Last 12 months

Purchases
0 · $0
Sales
57 · $21.07M
Shares bought / sold
0 / 192.54K
Net activity
Net selling $21.1 million

BillionToOne insider activity

Over the last 12 months, BillionToOne insiders reported 100 transactions on SEC Form 4: 0 open-market purchases and 57 sales. Insiders bought $0 and sold $21.1 million worth of stock, for net insider selling of $21.1 million. The largest seller was Atay Oguzhan, with $7.7 million in reported sales.

The most recent filing shows Tsao David (Chief Technology Officer) reporting a transaction in 10,000 shares at $2.80 on Oct 5, 2026. Insider sales are common for compensation, tax and diversification reasons, while open-market purchases are rarer; tracking both helps put BLLN's ownership changes in context.

Summary generated from market data by MetaCap's automated system. Methodology

BLLN insider transactions

BillionToOne insider transactions
DateInsiderTypeSharesValueFiling
Oct 5, 2026ten Bosch John RoderickSVP of Laboratory OperationsSale1,417$149.00KForm 4
Oct 5, 2026ten Bosch John RoderickSVP of Laboratory OperationsSale1,417$149.00KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale100$11.01KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale1,829$199.63KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale4,916$533.55KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale2,200$236.44KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale400$42.44KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale555$58.59KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale20$2.20KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale2,921$318.40KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale4,284$464.36KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale1,909$204.64KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerSale866$91.71KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerOption exercise10,000$28.00KForm 4
Oct 5, 2026Tsao DavidChief Technology OfficerOption exercise10,000$28.00KForm 4
Sep 28, 2026Atay OguzhanChairman and CEOSale2,666$321.63KForm 4
Sep 28, 2026Atay OguzhanChairman and CEOSale8,333$1.01MForm 4
Sep 28, 2026Atay OguzhanChairman and CEOOption exercise8,333$23.33KForm 4
Sep 24, 2026ten Bosch John RoderickSVP of Laboratory OperationsSale1,416$169.92KForm 4
Sep 24, 2026Tsao DavidChief Technology OfficerSale3,333$416.63KForm 4
Sep 24, 2026Tsao DavidChief Technology OfficerOption exercise3,333$9.33KForm 4
Sep 21, 2026ten Bosch John RoderickSVP of Laboratory OperationsSale1,416$150.96KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksSale5,840$644.11KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksSale2,920$322.10KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksSale6,968$768.56KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksSale19,384$2.14MForm 4
Sep 17, 2026Lynch Thomas P.See RemarksOption exercise5,840$179.76KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksOption exercise2,920$49.99KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksOption exercise6,968$80.48KForm 4
Sep 17, 2026Lynch Thomas P.See RemarksOption exercise19,384$167.67KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale2,666$261.27KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale2,666$261.27KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale3,143$318.99KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale2,010$202.56KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale1,500$149.35KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale1,680$165.71KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale7,214$731.79KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale2,531$254.57KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale2,456$244.55KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOSale4,465$440.39KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOOption exercise8,333$23.33KForm 4
Sep 14, 2026Atay OguzhanChairman and CEOOption exercise16,666$46.66KForm 4
Sep 10, 2026Sakakibara Shan RikuChief Product OfficerGift3,500—Form 4
Sep 9, 2026Atay OguzhanChairman and CEOGift20,000—Form 4
Sep 9, 2026Tsao DavidChief Technology OfficerSale10,000$1.00MForm 4
Sep 9, 2026Tsao DavidChief Technology OfficerSale10,000$975.40KForm 4
Sep 9, 2026Tsao DavidChief Technology OfficerOption exercise10,000$28.00KForm 4
Sep 9, 2026Tsao DavidChief Technology OfficerOption exercise10,000$28.00KForm 4
Sep 9, 2026ten Bosch John RoderickSVP of Laboratory OperationsSale1,416$138.12KForm 4
Sep 8, 2026Tsao DavidChief Technology OfficerGift20,000—Form 4
Sep 8, 2026Atay OguzhanChairman and CEOConversion20,000—Form 4
Sep 8, 2026Lynch Thomas P.See RemarksSale232$23.41KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale2,518$252.29KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale576$56.96KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale147$14.91KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale1,131$113.47KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale385$38.20KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale358$36.09KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale2,997$300.04KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale614$60.79KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale775$78.14KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale8,285$829.52KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale1,944$192.39KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksSale38$3.67KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksOption exercise3,326$102.37KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksOption exercise1,663$28.47KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksOption exercise3,969$45.84KForm 4
Sep 8, 2026Lynch Thomas P.See RemarksOption exercise11,042$95.51KForm 4
Sep 3, 2026Tsao DavidChief Technology OfficerConversion20,000—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother5,644—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother15,244—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother1,666—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother5,761—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother719—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother719—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother10,921—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother38,106—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother38,106—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother271,028—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother2,405—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother2,405—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother24,222—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother7,980—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother7,980—Form 4
Aug 26, 2026KOLLURI KRISHNA KITTUDirectorother129,780—Form 4
Aug 25, 2026ten Bosch John RoderickSVP of Laboratory OperationsSale1,417$141.70KForm 4
Aug 25, 2026Tsao DavidChief Technology OfficerSale10,000$1.00MForm 4
Aug 25, 2026Tsao DavidChief Technology OfficerOption exercise10,000$28.00KForm 4
Aug 10, 2026Tsao DavidChief Technology OfficerSale10,000$928.60KForm 4
Aug 10, 2026Tsao DavidChief Technology OfficerOption exercise10,000$28.00KForm 4
Aug 10, 2026ten Bosch John RoderickSVP of Laboratory OperationsSale1,417$131.58KForm 4
Aug 5, 2026Atay OguzhanChairman and CEOSale15,539$2.33MForm 4
Aug 5, 2026Atay OguzhanChairman and CEOOption exercise15,539$43.51KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOSale6,354$866.84KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOSale135$18.28KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOSale555$74.26KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOSale269$35.78KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOOption exercise6,250$17.50KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOOption exercise6,250$17.50KForm 4
Aug 3, 2026Atay OguzhanChairman and CEOOption exercise20,000$56.00KForm 4

Transaction codes follow SEC Form 4: P = open-market purchase, S = open-market sale, A = grant or award, M = option exercise, F = shares withheld for taxes. About Form 4

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