SCHEDULE 13G

ZeroStack Corp

Common Stock · CUSIP: 98957E106

Event date: 2025-12-19

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

• Blockchain Builders Fund I, LP

  Shares: 82,886.00 · Class: 9.9%

• Blockchain Builders GP, LLC

  Shares: 82,886.00 · Class: 9.9%

• Gil Rosen

  Shares: 82,886.00 · Class: 9.9%

• Blockchain Builders, LLC

  Shares: 82,886.00 · Class: 9.9%

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