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CIK 0002070849 · Non-accelerated filer<br>Emerging growth company

BillionToOne, Inc.

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Ticker
BLLN
Exchange
Nasdaq
Industry
Services-Medical Laboratories
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
811082020
Phone
650-460-2551
Business address
1035 O'BRIEN DRIVE, MENLO PARK, CA
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$26,737,121
in 19 filings, $26.7M under 10b5-1 plans

Net −$26,737,121. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Atay Oguzhan −$11.9M Chairman and CEO sold 44% of stake
  2. Tsao David −$7.7M Chief Technology Officer sold 99% of stake
  3. Lynch Thomas P. −$5.9M See Remarks sold 99% of stake
  4. ten Bosch John Roderick −$1.2M SVP of Laboratory Operations sold 41% of stake
Date Insider Transaction Shares Price Value Owned after
2025-11-07 Ileri Firat Director Conversion · Series C Convertible Preferred Stock −137,288 0
2025-11-07 Ileri Firat Director Conversion · Series A-6 Convertible Preferred Stock −2,260,520 0
2025-11-07 Ileri Firat Director Conversion · Series B-2 Convertible Preferred Stock −320,363 0
2025-11-07 Bremner Thomas S Director Conversion +152,440 152,440
2025-11-07 Bremner Thomas S Director Conversion +155,711 155,711
2025-11-07 Bremner Thomas S Director Conversion +176,271 176,271
2025-11-07 Bremner Thomas S Director Conversion +269,918 269,918
2025-11-07 Bremner Thomas S Director Conversion +240,072 240,072
2025-11-07 Bremner Thomas S Director Conversion +675,352 675,352
2025-11-07 Bremner Thomas S Director Conversion +277,508 277,508
2025-11-07 Bremner Thomas S Director Other disposition −8,333 0
2025-11-07 Bremner Thomas S Director Other disposition −152,440 0
2025-11-07 Bremner Thomas S Director Other disposition −155,711 0
2025-11-07 Bremner Thomas S Director Other disposition −176,271 0
2025-11-07 Bremner Thomas S Director Other disposition −269,918 0
2025-11-07 Bremner Thomas S Director Other disposition −240,072 0
2025-11-07 Bremner Thomas S Director Other disposition −675,352 0
2025-11-07 Bremner Thomas S Director Other disposition −277,508 0
2025-11-07 Bremner Thomas S Director Other acquisition +8,333 8,333
2025-11-07 Bremner Thomas S Director Other acquisition +152,440 152,440

Page 29 of 32 · 639 trades