SCHEDULE 13G/A

PERIMETER ACQUISITION CORP I

Class A Common Stock · CUSIP: G7010A129

Event date: 2025-12-31

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: 2,300,498 · Class: 9.28%

• Harraden Circle Investors GP, LP

  Shares: 2,300,498 · Class: 9.28%

• Harraden Circle Investors GP, LLC

  Shares: 2,300,498 · Class: 9.28%

• Harraden Circle Investors, LP

  Shares: 1,142,231 · Class: 4.61%

• Harraden Circle Special Opportunities, LP

  Shares: 663,285 · Class: 2.68%

• Harraden Circle Strategic Investments, LP

  Shares: 408,153 · Class: 1.65%

• Harraden Circle Concentrated, LP

  Shares: 86,829 · Class: 0.35%

• Frederick V. Fortmiller, Jr.

  Shares: 2,300,498 · Class: 9.28%

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