---
schema_version: "secwatch.filing_event.v1"
accession: "0001641172-25-011759"
form_type: "8-K"
ticker: "PMTR"
cik: "0002061473"
company_name: "Perimeter Acquisition Corp. I"
filed_at: "2025-05-20T23:59:59+00:00"
generated_at: "2026-05-21T00:36:58.398196+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Perimeter Acquisition Corp. I closes $241.5M IPO; trust account funded

## Summary
- IPO of 24.15M units at $10.00/unit closed May 14, 2025, including full over-allotment of 3.15M units.
- Private placement of 638,000 units to sponsor at $10.00/unit, raising $6.38M gross.
- Total $241.5M from IPO and private placement deposited in trust account; balance sheet shows $630K cash on hand.
- Transaction costs total $13.996M, including $8.45M deferred underwriting fee and $4.35M cash fee.
- Shareholders' deficit of ($7.73M) includes $241.5M in Class A shares subject to possible redemption.

## SEC filing metadata
- accession: 0001641172-25-011759
- form_type: 8-K
- ticker: PMTR
- cik: 0002061473
- company_name: Perimeter Acquisition Corp. I
- filed_at: 2025-05-20T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2061473/000164117225011759/0001641172-25-011759-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2061473/000164117225011759/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001641172-25-011759
- JSON: https://secwatch.observer/filing/0001641172-25-011759.json
- Plain text: https://secwatch.observer/filing/0001641172-25-011759.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.