---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-23-002832"
form_type: "8-K"
ticker: "MCAG"
cik: "0001859035"
company_name: "Mountain Crest Acquisition Corp. V"
filed_at: "2023-04-19T23:59:59+00:00"
generated_at: "2026-06-16T23:55:04.991213+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# MCAG amends AUM Biosciences merger deal; reduces issued shares to 9,125,538

## Summary
- Reduces issued Company Ordinary Shares from 9,841,118 to 9,125,538 as of the Amalgamation Effective Time.
- Amends definition of 'Fully-Diluted Company Shares' to include outstanding Company Options.
- All other terms of the Business Combination Agreement remain unchanged.

## SEC filing metadata
- accession: 0001829126-23-002832
- form_type: 8-K
- ticker: MCAG
- cik: 0001859035
- company_name: Mountain Crest Acquisition Corp. V
- filed_at: 2023-04-19T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1859035/000182912623002832/0001829126-23-002832-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1859035/000182912623002832/mountaincrest5_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-23-002832
- JSON: https://secwatch.observer/filing/0001829126-23-002832.json
- Plain text: https://secwatch.observer/filing/0001829126-23-002832.txt

## Key facts
- Material Agreements
  Mountain Crest Acquisition Corp. V amended Amendment No. 3 to Business Combination Agreement with AUM Biosciences Pte. Ltd., AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd., and AUM Biosciences Delaware Merger Sub, Inc. (effective 2023-04-19).
  - Action: amendment
  - Agreement: merger
  - Counterparty: AUM Biosciences Pte. Ltd., AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd., and AUM Biosciences Delaware Merger Sub, Inc.
  - Effective: 2023-04-19
  source text: On April 19, 2023, SPAC, the Company, Holdco, Amalgamation Sub, and Merger Sub entered into an Amendment No. 3 to Business Combination Agreement (the “Amendment No. 3”) to ( 1) amend the definition of “Fully-Diluted Company Shares” and (2) update the Company Interests issued and paid-up as of the Amalgamation Effective Time from 9,841,118 Company Ordinary Shares to 9,125,538 Company Ordinary Shares.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859035/000182912623002832/0001829126-23-002832-index.htm
- Material Agreements
  Mountain Crest Acquisition Corp. V entered into Business Combination Agreement with AUM Biosciences Pte. Ltd. (effective 2022-10-19).
  - Action: entry
  - Agreement: merger
  - Counterparty: AUM Biosciences Pte. Ltd.
  - Effective: 2022-10-19
  source text: on October 19, 2022, Mountain Crest Acquisition Corp. V, a Delaware corporation (“SPAC”), entered into a Business Combination Agreement (as it may be amended, supplemented or otherwise modified from time to time) (the “Business Combination Agreement”) with AUM Biosciences Pte. Ltd., a private company limited by shares incorporated in Singapore, with company registration number 201810204D (the “Company”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859035/000182912623002832/0001829126-23-002832-index.htm

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