13F Pro

SEC Form 4 reporting owner

Atay Oguzhan

Atay Oguzhan has filed 75 Form 4 transactions reported between June 8, 2026 and September 14, 2026, as Chairman and CEO of BillionToOne, Inc..

Name as filed: Atay Oguzhan

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$15.0M
61 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 14, 2026
transaction date

Roles and reported holdings

  • BLLNBillionToOne, Inc.
    Jun 8, 2026 – Sep 14, 2026

    Chairman and CEO

    Held directly0 sh as of Sep 14, 2026 · Form 4
    Held indirectly (latest line)159,834 sh as of Sep 14, 2026 · Form 4

    24 months: $15.0M sold

Transaction history

All 75 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · indirect2,666$261K@ $98.00Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct3,143$319K@ $101.49Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct2,010$203K@ $100.78Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,500$149K@ $99.57Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,680$166K@ $98.64Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct7,214$732K@ $101.44Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct2,531$255K@ $100.58Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct2,456$245K@ $99.57Form 4
Sep 14, 2026BLLNChairman and CEOOpen-market saleCode S · direct4,465$440K@ $98.63Form 4
Sep 14, 2026BLLNChairman and CEOOption exerciseCode M · direct8,333$23K@ $2.80Form 4
Sep 14, 2026BLLNChairman and CEOOption exerciseCode M · direct16,666$47K@ $2.80Form 4
Sep 9, 2026BLLNChairman and CEOGiftCode G · direct20,000—Form 4
Sep 8, 2026BLLNChairman and CEOConversion of derivativeCode C · direct20,000—Form 4
Aug 5, 2026BLLNChairman and CEOOption exerciseCode M · direct15,539$44K@ $2.80Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct760$105K@ $138.09Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct3,125$429K@ $137.25Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,983$271K@ $136.42Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct43$6K@ $135.41Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct82$11K@ $139.21Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct762$105K@ $138.09Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct3,124$429K@ $137.25Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,981$270K@ $136.42Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct44$6K@ $135.41Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct173$23K@ $133.81Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct84$11K@ $133.00Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct267$37K@ $139.21Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct2,431$336K@ $138.09Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct9,989$1.4M@ $137.25Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct6,354$867K@ $136.42Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct135$18K@ $135.42Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct555$74K@ $133.81Form 4
Aug 3, 2026BLLNChairman and CEOOpen-market saleCode S · direct269$36K@ $133.01Form 4
Aug 3, 2026BLLNChairman and CEOOption exerciseCode M · direct6,250$18K@ $2.80Form 4
Aug 3, 2026BLLNChairman and CEOOption exerciseCode M · direct20,000$56K@ $2.80Form 4
Jul 9, 2026BLLNChairman and CEOOpen-market saleCode S · direct352$45K@ $128.23Form 4
Jul 9, 2026BLLNChairman and CEOOpen-market saleCode S · direct2,657$339K@ $127.44Form 4
Jul 9, 2026BLLNChairman and CEOOpen-market saleCode S · direct2,002$253K@ $126.48Form 4
Jul 9, 2026BLLNChairman and CEOOpen-market saleCode S · direct7,489$939K@ $125.43Form 4
Jul 9, 2026BLLNChairman and CEOOption exerciseCode M · direct12,500$35K@ $2.80Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect2,324$286K@ $123.25Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect586$72K@ $122.08Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect50$6K@ $124.74Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect1,221$151K@ $124.04Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect2,323$286K@ $123.25Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect587$72K@ $122.08Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect444$54K@ $120.69Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect591$71K@ $119.67Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · indirect1,034$123K@ $118.81Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct194$24K@ $124.61Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,642$203K@ $123.81Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,945$239K@ $123.07Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct349$43K@ $121.84Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct570$69K@ $120.66Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,138$136K@ $119.36Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct412$49K@ $118.49Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct622$78K@ $124.61Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct5,253$650K@ $123.81Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct6,223$766K@ $123.07Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,115$136K@ $121.84Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,828$221K@ $120.66Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct3,639$434K@ $119.36Form 4
Jul 6, 2026BLLNChairman and CEOOpen-market saleCode S · direct1,320$156K@ $118.49Form 4
Jul 6, 2026BLLNChairman and CEOOption exerciseCode M · direct6,250$18K@ $2.80Form 4
Jul 6, 2026BLLNChairman and CEOOption exerciseCode M · direct20,000$56K@ $2.80Form 4
Jun 9, 2026BLLNGiftCode G · direct10,000—Form 4
Jun 8, 2026BLLNConversion of derivativeCode C · direct10,000—Form 4
Jun 8, 2026BLLNOpen-market saleCode S · direct556$56K@ $99.97Form 4
Jun 8, 2026BLLNOpen-market saleCode S · direct3,605$357K@ $99.06Form 4
Jun 8, 2026BLLNOpen-market saleCode S · direct4,066$399K@ $98.12Form 4
Jun 8, 2026BLLNOpen-market saleCode S · direct4,372$424K@ $96.89Form 4
Jun 8, 2026BLLNOpen-market saleCode S · direct1,856$177K@ $95.59Form 4
Jun 8, 2026BLLNOpen-market saleCode S · direct5,466$518K@ $94.76Form 4
Jun 8, 2026BLLNOpen-market saleCode S · direct79$8K@ $100.87Form 4
Jun 8, 2026BLLNOption exerciseCode M · direct6,250$18K@ $2.80Form 4
Jun 8, 2026BLLNOption exerciseCode M · direct20,000$56K@ $2.80Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.