SCHEDULE 13D

QT IMAGING HLDGS INC

Common Stock, $0.0001 par value · CUSIP: 746962109

Event date: 2025-03-21

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

• GigAcquisitions5, LLCReported CIK 0001844511

  Shares: 0.00 · Class: 0.0%

• Dr. Avi S. KatzReported CIK 0001451693

  Shares: 1,360,345.00 · Class: 4.8%

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