SCHEDULE 13D

Billiontoone Inc

Class A common stock · CUSIP: 090168105

Event date: 2025-11-06

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Hummingbird Ventures Management NVReported CIK 0002099044

  Shares: 7,887,237.00 · Class: 19.6%

• Hummingbird Opportunity Fund II CommV

  Shares: 2,631,664.00 · Class: 6.55%

• Hummingbird Ventures III CommV

  Shares: 2,580,833.00 · Class: 6.43%

• Hummingbird Dragons CommV

  Shares: 2,015,118.00 · Class: 5.02%

• Hummingbird Collective CommV

  Shares: 18,845.00 · Class: 0.05%

• HB&Q NV

  Shares: 640,727.00 · Class: 1.60%

• Firat IleriReported CIK 0002087908

  Shares: 7,887,237.00 · Class: 19.6%

• Barend Van den Brande

  Shares: 7,887,237.00 · Class: 19.6%

• Lukas Decoster

  Shares: 7,887,237.00 · Class: 19.6%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.