---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-062839"
form_type: "8-K"
ticker: "CSTAF"
cik: "0001834032"
company_name: "Constellation Acquisition Corp I"
filed_at: "2026-05-29T20:17:55+00:00"
generated_at: "2026-05-29T20:19:11.743848+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Constellation Acquisition extends SPAC deadline to June 29, 2026 via $5K sponsor note draw

## Summary
- Drew $5,000 from unsecured promissory note with Constellation Sponsor LP on May 28, 2026.
- Deposited funds into trust account to extend initial business combination deadline by one month.
- Extension from May 29, 2026 to June 29, 2026; fourth of eleven permitted one-month extensions.
- Note is non-interest bearing, matures upon business combination; repaid from trust only if no deal.

## SEC filing metadata
- accession: 0001213900-26-062839
- form_type: 8-K
- ticker: CSTAF
- cik: 0001834032
- company_name: Constellation Acquisition Corp I
- filed_at: 2026-05-29T20:17:55+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1834032/000121390026062839/0001213900-26-062839-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1834032/000121390026062839/ea0292685-8k_constellation1.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-062839
- JSON: https://secwatch.observer/filing/0001213900-26-062839.json
- Plain text: https://secwatch.observer/filing/0001213900-26-062839.txt

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