---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-052899"
form_type: "8-K"
ticker: "EURK"
cik: "0002000410"
company_name: "Eureka Acquisition Corp"
filed_at: "2026-05-06T23:59:59+00:00"
generated_at: "2026-05-14T22:57:55.816462+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Eureka Acquisition extends deadline to June 3, 2026; issues $150K note to Marine Thinking

## Summary
- Deposited $150,000 in trust for one-month extension from May 3 to June 3, 2026.
- Issued unsecured promissory note for $150,000 to Marine Thinking (target), bearing no interest, due at business combination or expiry.
- Marine Thinking can convert note into units at $10.00 per unit; units consist of one ordinary share and one right.
- Extension funded by Marine Thinking per Business Combination Agreement dated Oct 29, 2025; note is unregistered.

## SEC filing metadata
- accession: 0001213900-26-052899
- form_type: 8-K
- ticker: EURK
- cik: 0002000410
- company_name: Eureka Acquisition Corp
- filed_at: 2026-05-06T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 2.03, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2000410/000121390026052899/0001213900-26-052899-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2000410/000121390026052899/ea0289458-8k425_eureka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-052899
- JSON: https://secwatch.observer/filing/0001213900-26-052899.json
- Plain text: https://secwatch.observer/filing/0001213900-26-052899.txt

## Source-grounded claims
- claim_id: 72bed2886e588910e9e7e6855aa6903e1b46c050
  claim: Eureka Acquisition Corp incurred loan of $150,000 with Marine Thinking Inc. 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: The Company issued an unsecured promissory note in the aggregate principal amount of $150,000 (the “ Extension Note ”) dated April 4, 2026 to Marine Thinking in connection with the payment of the Monthly Extension Fee. The Extension Note bears no interest and is payable in full 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 (the “ Maturity Date ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/2000410/000121390026052899/0001213900-26-052899-index.htm

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