SCHEDULE 13G

GIGCAPITAL8 CORP

Class A Common Stock · CUSIP: G3864J126

Event date: 2025-10-06

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

• Harraden Circle Investments, LLC

  Shares: 2,178,000 · Class: 8.49%

• Harraden Circle Investors GP, LP

  Shares: 2,178,000 · Class: 8.49%

• Harraden Circle Investors GP, LLC

  Shares: 2,178,000 · Class: 8.49%

• Harraden Circle Investors, LP

  Shares: 1,124,883 · Class: 4.38%

• Harraden Circle Special Opportunities, LP

  Shares: 545,195 · Class: 2.12%

• Harraden Circle Strategic Investments, LP

  Shares: 382,119 · Class: 1.49%

• Harraden Circle Concentrated, LP

  Shares: 125,803 · Class: 0.49%

• Frederick V. Fortmiller, Jr.

  Shares: 2,178,000 · Class: 8.49%

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