144
0002088549
XXXXXXXX
LIVE
0002070849
BillionToOne, Inc.
001-42934
1035 O'BRIEN DRIVE
MENLO PARK
CA
94025
650-460-2551
Atay Oguzhan
Officer
Director
Class A
Fidelity Brokerage Services LLC
900 Salem Street
Smithfield
RI
02917
2500
343425.00
41442834
08/03/2026
NASDAQ
Class A
12/30/2021
Pre-IPO Shares
Issuer
N
2500
12/30/2021
Cash
N
Oguzhan Atay
1035 O'Brien Drive
Menlo Park
CA
94025
Class A
06/08/2026
26250
2563632.00
Ezgi N. Akcinar Atay
1035 O'Brien Drive
Menlo Park
CA
94025
Class A
06/08/2026
12500
1227812.50
Atay 2021 Dynasty Trust
1035 O'Brien Drive
Menlo Park
CA
94025
Class A
06/08/2026
2500
245562.50
Oguzhan Atay
1035 O'Brien Drive
Menlo Park
CA
94025
Class A
07/06/2026
26250
3203733.13
Ezgi N. Akcinar Atay
1035 O'Brien Drive
Menlo Park
CA
94025
Class A
07/06/2026
12500
1525645.67
Atay 2021 Dynasty Trust
1035 O'Brien Drive
Menlo Park
CA
94025
Class A
07/06/2026
2500
300000.00
Oguzhan Atay
1035 O'Brien Drive
Menlo Park
CA
94025
Class A
07/09/2026
12500
1576276.25
Today's sale and sales within the past 3 months occurred in the account of the Atay 2021 Dynasty Trust by Icontrust Llc, trustee on the account. Oguzhan Atay is an account stakeholder in the Atay 2021 Dynasty Trust. There are also sales within the past 3 months which occurred in the account of Ezgi N. Akcinar Atay, who is the spouse of Oguzhan Atay.
08/03/2026
03/06/2026
/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Oguzhan Atay