---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-23-004262"
form_type: "8-K"
ticker: "MCAG"
cik: "0001859035"
company_name: "Mountain Crest Acquisition Corp. V"
filed_at: "2023-06-20T23:59:59+00:00"
generated_at: "2026-06-13T21:50:29.901368+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Mountain Crest Acquisition Corp. V announces termination of business combination with AUM Biosciences

## Summary
- AUM Biosciences delivered termination notice on June 8, 2023, ending the Business Combination Agreement.
- Mountain Crest's board cancelled the special meeting of stockholders scheduled for June 23, 2023.
- Transfer agent will not process any share redemption requests submitted by stockholders.
- Original deal was signed October 19, 2022, amended multiple times, with combined company to trade as AUMB.
- SPAC now must seek an alternative target or face potential liquidation.

## SEC filing metadata
- accession: 0001829126-23-004262
- form_type: 8-K
- ticker: MCAG
- cik: 0001859035
- company_name: Mountain Crest Acquisition Corp. V
- filed_at: 2023-06-20T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1859035/000182912623004262/0001829126-23-004262-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1859035/000182912623004262/mountaincrest5_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-23-004262
- JSON: https://secwatch.observer/filing/0001829126-23-004262.json
- Plain text: https://secwatch.observer/filing/0001829126-23-004262.txt

## Key facts
- Material Agreements
  Mountain Crest Acquisition Corp. V terminated Business Combination Agreement with AUM Biosciences Pte. Ltd. valued at Termination of Business Combination Agreement among Mountain Crest Acquisition Corp. V and AUM Biosc (effective 2023-06-08).
  - Action: termination
  - Agreement: merger
  - Counterparty: AUM Biosciences Pte. Ltd.
  - Value: Termination of Business Combination Agreement among Mountain Crest Acquisition Corp. V and AUM Biosc
  - Effective: 2023-06-08
  source text: On June 8, 2023, Mountain Crest received a termination notice (the “Notice”) from AUM. The Notice terminated the Business Combination Agreement as of June 8, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859035/000182912623004262/0001829126-23-004262-index.htm

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