---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-23-001434"
form_type: "8-K"
ticker: "MCAG"
cik: "0001859035"
company_name: "Mountain Crest Acquisition Corp. V"
filed_at: "2023-02-13T23:59:59+00:00"
generated_at: "2026-06-19T16:47:40.607244+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# MCAG extends business combination deadline with AUM Biosciences to May 15, 2023

## Summary
- Outside Date extended from February 15, 2023 to May 15, 2023 under the Business Combination Agreement.
- Amendment executed February 10, 2023 by SPAC, AUM Biosciences Pte. Ltd., Holdco, and merger subs.
- No other changes were made to the original Business Combination Agreement dated October 19, 2022.
- Holdco, Amalgamation Sub, and Merger Sub had joined the agreement via joinder on January 27, 2023.

## SEC filing metadata
- accession: 0001829126-23-001434
- form_type: 8-K
- ticker: MCAG
- cik: 0001859035
- company_name: Mountain Crest Acquisition Corp. V
- filed_at: 2023-02-13T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1859035/000182912623001434/0001829126-23-001434-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1859035/000182912623001434/mountaincrest5_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-23-001434
- JSON: https://secwatch.observer/filing/0001829126-23-001434.json
- Plain text: https://secwatch.observer/filing/0001829126-23-001434.txt

## Key facts
- Material Agreements
  Mountain Crest Acquisition Corp. V entered into joinder agreement with AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd., AUM Biosciences Delaware Merger Sub, Inc. (effective 2023-01-27).
  - Action: entry
  - Agreement: merger
  - Counterparty: 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, a Cayman Islands exempted company (“Holdco”), AUM Biosciences Subsidiary Pte. Ltd., a private company limited by shares incorporated in Singapore, with company registration number 202238778Z and a direct wholly-owned subsidiary of Holdco (“Amalgamation Sub”), and AUM Biosciences Delaware Merger Sub, Inc., a Delaware corporation and a direct wholly-owned subsidiary of Holdco (“Merger Sub”) entered into a joinder agreement pursuant to which Holdco, Amalgamation Sub, and Merger Sub joined the Business Combination Agreement as parties.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859035/000182912623001434/0001829126-23-001434-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: As previously announced, 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/1859035/000182912623001434/0001829126-23-001434-index.htm
- Material Agreements
  Mountain Crest Acquisition Corp. V amended Amendment with AUM Biosciences Pte. Ltd., AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd., AUM Biosciences Delaware Merger Sub, Inc. (effective 2023-02-10).
  - Action: amendment
  - Agreement: merger
  - Counterparty: AUM Biosciences Pte. Ltd., AUM Biosciences Limited, AUM Biosciences Subsidiary Pte. Ltd., AUM Biosciences Delaware Merger Sub, Inc.
  - Effective: 2023-02-10
  source text: On February 10, 2023, SPAC, the Company, Holdco, Amalgamation Sub, and Merger Sub entered into an amendment to Business Combination Agreement (the “Amendment”) to extend the Outside Date in the Business Combination Agreement from February 15, 2023 to May 15, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859035/000182912623001434/0001829126-23-001434-index.htm

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