---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-070821"
form_type: "8-K"
ticker: "EURK"
cik: "0002000410"
company_name: "Eureka Acquisition Corp"
filed_at: "2026-06-23T10:05:56+00:00"
generated_at: "2026-06-23T10:10:32.627462+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Eureka Acquisition Corp amends BCA with Marine Thinking to revise post-closing board composition

## Summary
- On June 12, 2026, Eureka Acquisition Corp and Marine Thinking entered Amendment No. 1 to their Business Combination Agreement.
- Amendment revises Section 5.19: post-closing board to consist of 8 directors; 7 designated by Company, 1 by IPO Sponsor.
- At least 5 of 8 directors must be Canadian citizens; 4 must be independent per Nasdaq rules, 1 a financial expert.
- Other terms of the original BCA remain unchanged; amendment signed by all parties.

## SEC filing metadata
- accession: 0001213900-26-070821
- form_type: 8-K
- ticker: EURK
- cik: 0002000410
- company_name: Eureka Acquisition Corp
- filed_at: 2026-06-23T10:05:56+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2000410/000121390026070821/0001213900-26-070821-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2000410/000121390026070821/ea0295465-8k425_eureka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-070821
- JSON: https://secwatch.observer/filing/0001213900-26-070821.json
- Plain text: https://secwatch.observer/filing/0001213900-26-070821.txt

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