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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 Humming Bird Ventures Management NV 10% owner Other acquisition +2,580,833 2,580,833
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series B-2 Convertible Preferred Stock −640,727 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series B-1 Convertible Preferred Stock −18,845 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series C Convertible Preferred Stock −1,569,015 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series D Convertible Preferred Stock −446,103 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series A-1 Convertible Preferred Stock −20,000 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series A-2 Convertible Preferred Stock −33,000 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series B-1 Convertible Preferred Stock −2,261,377 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series C Convertible Preferred Stock −137,288 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series A-6 Convertible Preferred Stock −2,260,520 0
2025-11-07 Humming Bird Ventures Management NV 10% owner Conversion · Series B-2 Convertible Preferred Stock −320,363 0
2025-11-07 Lynch Thomas P. See Remarks Other disposition −600 0
2025-11-07 Lynch Thomas P. See Remarks Other acquisition +600 600
2025-11-07 Lynch Thomas P. See Remarks Purchase +100 $60.00 $6K 700
2025-11-07 Lynch Thomas P. See Remarks Other disposition · Stock Option (right to buy) −79,400 0
2025-11-07 Lynch Thomas P. See Remarks Other acquisition · Stock Option (right to buy) +79,400 79,400
2025-11-07 Lynch Thomas P. See Remarks Other disposition · Stock Option (right to buy) −15,000 0
2025-11-07 Lynch Thomas P. See Remarks Other acquisition · Stock Option (right to buy) +15,000 15,000
2025-11-07 Lynch Thomas P. See Remarks Other disposition · Stock Option (right to buy) −10,000 0
2025-11-07 Lynch Thomas P. See Remarks Other acquisition · Stock Option (right to buy) +10,000 10,000

Page 22 of 32 · 639 trades