---
schema_version: "secwatch.filing_event.v1"
accession: "0001929980-26-000021"
form_type: "8-K"
ticker: "HSPOF"
cik: "0001946021"
company_name: "Horizon Space Acquisition I Corp."
filed_at: "2026-01-27T23:59:59+00:00"
generated_at: "2026-05-16T07:37:35.218540+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Horizon Space Acquisition I issues $500K unsecured note to sponsor for working capital

## Summary
- Unsecured promissory note for $500,000 issued to Horizon Space Acquisition I Sponsor Corp. on Jan 26, 2026.
- Note bears no interest; principal due upon business combination or expiration of company term.
- Sponsor may convert outstanding principal into private units at $10.00 per unit at least 2 days before business combination.
- Proceeds used for general working capital; note repayable only from non-trust account funds if no business combination.
- Conversion yields units consisting of one ordinary share, one warrant, and one right to one-tenth of a share.

## SEC filing metadata
- accession: 0001929980-26-000021
- form_type: 8-K
- ticker: HSPOF
- cik: 0001946021
- company_name: Horizon Space Acquisition I Corp.
- filed_at: 2026-01-27T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 1.01, 2.03, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1946021/000192998026000021/0001929980-26-000021-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1946021/000192998026000021/hspo_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001929980-26-000021
- JSON: https://secwatch.observer/filing/0001929980-26-000021.json
- Plain text: https://secwatch.observer/filing/0001929980-26-000021.txt

## Key facts
- Debt Financings
  Horizon Space Acquisition I Corp. incurred loan of $500,000 with Horizon Space Acquisition I Sponsor Corp. maturing upon the earlier to occur of (i) the consummation of the Company’s business combination or (ii) the date of expiry of the term of the Company.
  - Instrument: loan
  - Principal: $500,000
  - Counterparty: Horizon Space Acquisition I Sponsor Corp.
  - Maturity: upon the earlier to occur of (i) the consummation of the Company’s business combination or (ii) the date of expiry of the term of the Company
  - Event: incurrence
  source text: On January 26, 2026, Horizon Space Acquisition I Corp., a Cayman Islands exempted company (the “ Company ”) issued an unsecured promissory note (the “ Note ”) in the principal amount of $500,000 to Horizon Space Acquisition I Sponsor Corp., a Cayman Islands company, the sponsor of the Company (the “ Sponsor ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1946021/000192998026000021/0001929980-26-000021-index.htm

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