---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-080922"
form_type: "8-K"
ticker: "EURK"
cik: "0002000410"
company_name: "Eureka Acquisition Corp"
filed_at: "2025-08-27T23:59:59+00:00"
generated_at: "2026-05-17T09:48:47.858929+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Eureka Acquisition Corp enters $300K sponsor note with conversion option

## Summary
- Eureka Acquisition Corp issued up to $300,000 unsecured promissory note to sponsor Hercules Capital Management Corp.
- Note bears no interest; principal due upon business combination or company expiry.
- Sponsor can convert note into private units at $10/unit prior to deal closing.
- Proceeds used for general working capital; drawdowns available until business combination.

## SEC filing metadata
- accession: 0001213900-25-080922
- form_type: 8-K
- ticker: EURK
- cik: 0002000410
- company_name: Eureka Acquisition Corp
- filed_at: 2025-08-27T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 1.01, 2.03, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2000410/000121390025080922/0001213900-25-080922-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2000410/000121390025080922/ea0254711-8k_eureka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-080922
- JSON: https://secwatch.observer/filing/0001213900-25-080922.json
- Plain text: https://secwatch.observer/filing/0001213900-25-080922.txt

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