4processed

Form 4 — Insider Transaction

BillionToOne, Inc.(BLLN)

Filing Date

June 8, 2026

Accepted

June 8, 2026

Accession No.

0002088549-26-000002

CIK

0002070849

Insider Transactions

InsiderTitleTypeSharesPriceValueOwned AfterSecurityDate
Atay OguzhanSee RemarksOther20.0K$2.820.0KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther6.3K$2.826.3KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther79$100.8726.2KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther5.5K$94.76320.7KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther1.9K$95.5918.8KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther4.4K$96.89214.5KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther4.1K$98.12110.4KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther3.6K$99.0636.8KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther556$99.9696.3KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther6.3K$1000Class A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther10.0K$010.0KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther10.0K$00Class A Common StockJun 9, 2026
Atay OguzhanSee RemarksOther6.3K$96.45193.8KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther6.3K$100187.5KClass A Common StockJun 8, 2026
Atay OguzhanSee RemarksOther20.0K$2.8620.0KStock Option (right to buy)Jun 8, 2026
Atay OguzhanSee RemarksOther6.3K$2.8613.8KStock Option (right to buy)Jun 8, 2026
Atay OguzhanSee RemarksOther10.0K$02.22MClass B Common StockJun 8, 2026