BillionToOne, Inc. (BLLN) Insider Trading -- Recent Executive & Director Transactions

26 insiders reported 591 Form 4 transactions for BillionToOne, Inc. (BLLN) over the past 18 months (most recent 2026-08-12). Recent activity: Tsao David (Chief Technology Officer) Buy 10,000 shares, ten Bosch John Roderick (SVP of Laboratory Operations) Sell 1,417 shares, Tsao David (Chief Technology Officer) Sell 10,000 shares, Atay Oguzhan (Chairman and CEO) Buy 15,539 shares, Atay Oguzhan (Chairman and CEO) Sell 15,539 shares. Source: SEC Form 4.

DateInsiderTitleTypeSharesValue
2026-08-12Tsao DavidChief Technology OfficerBuy10,000$28,000
2026-08-12ten Bosch John RoderickSVP of Laboratory OperationsSell1,417$131,583
2026-08-12Tsao DavidChief Technology OfficerSell10,000$928,600
2026-08-07Atay OguzhanChairman and CEOBuy15,539$43,509
2026-08-07Atay OguzhanChairman and CEOSell15,539$2.3M
2026-08-05Atay OguzhanChairman and CEOSell9,989$1.4M
2026-08-05Atay OguzhanChairman and CEOBuy6,250$17,500
2026-08-05Atay OguzhanChairman and CEOBuy6,250$17,500
2026-08-05Atay OguzhanChairman and CEOSell269$35,779
2026-08-05Atay OguzhanChairman and CEOSell555$74,264
2026-08-05Atay OguzhanChairman and CEOSell135$18,282
2026-08-05Atay OguzhanChairman and CEOSell6,354$866,842
2026-08-05Atay OguzhanChairman and CEOBuy20,000$56,000
2026-08-05Atay OguzhanChairman and CEOSell2,431$335,695
2026-08-05Atay OguzhanChairman and CEOSell267$37,168
2026-08-05Atay OguzhanChairman and CEOSell84$11,172
2026-08-05Atay OguzhanChairman and CEOSell173$23,149
2026-08-05Atay OguzhanChairman and CEOSell44$5,958
2026-08-05Atay OguzhanChairman and CEOSell1,981$270,257
2026-08-05Atay OguzhanChairman and CEOSell3,124$428,754
2026-08-05Atay OguzhanChairman and CEOSell762$105,224
2026-08-05Atay OguzhanChairman and CEOSell82$11,415
2026-08-05Atay OguzhanChairman and CEOSell84$11,173
2026-08-05Atay OguzhanChairman and CEOSell173$23,149
2026-08-05Atay OguzhanChairman and CEOSell43$5,823

Source: SEC Form 4 filings · as of 2026-08-12