---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-092350"
form_type: "8-K"
ticker: "CSTAF"
cik: "0001834032"
company_name: "Constellation Acquisition Corp I"
filed_at: "2025-09-26T23:59:59+00:00"
generated_at: "2026-05-17T05:36:01.353511+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Constellation Acquisition Corp I draws $5,000 sponsor note to extend deadline to Oct 29, 2025

## Summary
- Borrowed $5,000 from sponsor under unsecured promissory note dated Jan 30, 2024.
- Funds deposited into trust account to extend business combination deadline to Oct 29, 2025.
- Eighth of eleven permitted one-month extensions under amended articles.
- Note is non-interest bearing; repayment only from trust account residual if no deal closes.

## SEC filing metadata
- accession: 0001213900-25-092350
- form_type: 8-K
- ticker: CSTAF
- cik: 0001834032
- company_name: Constellation Acquisition Corp I
- filed_at: 2025-09-26T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1834032/000121390025092350/0001213900-25-092350-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1834032/000121390025092350/ea0258341-8k_constellation1.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-092350
- JSON: https://secwatch.observer/filing/0001213900-25-092350.json
- Plain text: https://secwatch.observer/filing/0001213900-25-092350.txt

## Key facts
- Debt Financings
  Constellation Acquisition Corp I incurred loan of $5,000 with Constellation Sponsor LP at does not bear interest maturing upon closing of the Company's initial business combination.
  - Instrument: loan
  - Principal: $5,000
  - Counterparty: Constellation Sponsor LP
  - Rate: does not bear interest
  - Maturity: upon closing of the Company's initial business combination
  - Event: incurrence
  source text: On September 26, 2025, Constellation Acquisition Corp I (the “Company”) drew an aggregate of $5,000 (the “Extension Funds”), as approved by unanimous resolution of the extension committee of the Company’s board of directors, dated September 26, 2025, pursuant to the unsecured promissory note, dated January 30, 2024 between the Company and Constellation Sponsor LP (the “Note”)
  evidence_url: https://www.sec.gov/Archives/edgar/data/1834032/000121390025092350/0001213900-25-092350-index.htm

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