---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-083939"
form_type: "8-K"
ticker: "MCGA"
cik: "0002064658"
company_name: "Yorkville Acquisition Corp."
filed_at: "2026-07-15T21:12:24+00:00"
generated_at: "2026-07-15T21:14:08.181391+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Yorkville Acquisition Corp. issues $500K amended promissory note to sponsor for working capital

## Summary
- Sponsor advanced additional $250K on May 4, 2026, increasing total principal to $500K under amended note.
- Note is non-interest bearing, due upon business combination or winding up.
- Convertible at sponsor's option at $10/unit into units identical to private placement units (max 50,000 units).
- Note amends and restates prior $250K note from February 11, 2026.
- Issuance relied on Section 4(a)(2) exemption for unregistered securities.

## SEC filing metadata
- accession: 0001104659-26-083939
- form_type: 8-K
- ticker: MCGA
- cik: 0002064658
- company_name: Yorkville Acquisition Corp.
- filed_at: 2026-07-15T21:12:24+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/2064658/000110465926083939/0001104659-26-083939-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2064658/000110465926083939/tm2620589d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-083939
- JSON: https://secwatch.observer/filing/0001104659-26-083939.json
- Plain text: https://secwatch.observer/filing/0001104659-26-083939.txt

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