---
schema_version: "secwatch.filing_event.v1"
accession: "0001929980-26-000076"
form_type: "8-K"
ticker: "HSPT"
cik: "0002032950"
company_name: "Horizon Space Acquisition II Corp."
filed_at: "2026-03-18T23:59:59+00:00"
generated_at: "2026-05-15T09:58:35.936548+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Horizon Space Acquisition II extends deadline to April 18, 2026 via $50,000 trust deposit by William Wang

## Summary
- Extension from March 18 to April 18, 2026 is the second of up to twelve monthly extensions permitted.
- $50,000 deposited into trust account by William Wang, CEO of target SL Bio, in lieu of sponsor.
- Company issued a $50,000 non-interest-bearing promissory note to Wang, convertible into units at $10/unit upon business combination.
- Note payable upon business combination or expiry of SPAC term; proceeds may not come from trust if deal fails.
- Business combination with SL Bio remains pending; original agreement signed May 9, 2025.

## SEC filing metadata
- accession: 0001929980-26-000076
- form_type: 8-K
- ticker: HSPT
- cik: 0002032950
- company_name: Horizon Space Acquisition II Corp.
- filed_at: 2026-03-18T23:59:59+00:00
- event_type: other_material
- 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/2032950/000192998026000076/0001929980-26-000076-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2032950/000192998026000076/hspt_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001929980-26-000076
- JSON: https://secwatch.observer/filing/0001929980-26-000076.json
- Plain text: https://secwatch.observer/filing/0001929980-26-000076.txt

## Source-grounded claims
- claim_id: 2cf0f263860aef5b035a676fd9d0116480cf240b
  claim: Horizon Space Acquisition II Corp. incurred loan of $50,000 with Mr. William Wang at no interest 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.
  evidence_excerpt: On March 17, 2026, the Company issued an unsecured promissory note of $50,000 (the “ Note ”) to the Payee.
  evidence_url: https://www.sec.gov/Archives/edgar/data/2032950/000192998026000076/0001929980-26-000076-index.htm

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