---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-23-001150"
form_type: "8-K"
ticker: "MCAG"
cik: "0001859035"
company_name: "Mountain Crest Acquisition Corp. V"
filed_at: "2023-01-30T23:59:59+00:00"
generated_at: "2026-06-20T06:48:20.087153+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# MCAG adds newly formed entities as parties to AUM Biosciences merger agreement

## Summary
- Joinder Agreement dated Jan 27, 2023 admits Holdco (AUM Biosciences Limited), Amalgamation Sub, and Merger Sub to the Oct 19, 2022 Business Combination Agreement.
- Holdco will become the publicly traded holding company; Amalgamation Sub will merge into AUM Biosciences; Merger Sub will merge into SPAC.
- No changes to transaction terms, consideration, or closing conditions were disclosed in the joinder.
- All newly formed entities are wholly-owned subsidiaries of Holdco.

## SEC filing metadata
- accession: 0001829126-23-001150
- form_type: 8-K
- ticker: MCAG
- cik: 0001859035
- company_name: Mountain Crest Acquisition Corp. V
- filed_at: 2023-01-30T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1859035/000182912623001150/0001829126-23-001150-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1859035/000182912623001150/mountaincrestv_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-23-001150
- JSON: https://secwatch.observer/filing/0001829126-23-001150.json
- Plain text: https://secwatch.observer/filing/0001829126-23-001150.txt

## Key facts
- Material Agreements
  Mountain Crest Acquisition Corp. V amended Business Combination Agreement with AUM Biosciences Pte. Ltd., AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd., AUM Biosciences Delaware Merger Sub, Inc. (effective 2023-01-27).
  - Action: amendment
  - Agreement: merger
  - Counterparty: AUM Biosciences Pte. Ltd., AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd., AUM Biosciences Delaware Merger Sub, Inc.
  - Effective: 2023-01-27
  source text: On January 27, 2023, SPAC, the Company, AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd. and AUM Biosciences Delaware Merger Sub, Inc. entered into a joinder agreement to the Business Combination Agreement (the “Joinder Agreement”), that expressly amended and modified the Business Combination Agreement
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859035/000182912623001150/0001829126-23-001150-index.htm

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