---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-26-009623"
form_type: "8-K"
ticker: "QUMS"
cik: "0002070900"
company_name: "Quantumsphere Acquisition Corp"
filed_at: "2026-09-02T00:41:02+00:00"
generated_at: "2026-09-02T10:05:07.166041+00:00"
event_type: "m_and_a"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Quantumsphere terminates merger agreement with SACH Pte. Ltd.

## Summary
- Termination notice delivered Sept 1, 2026 under Section 13.2(a) of Merger Agreement dated Oct 3, 2025.
- Prior notice to SACH on July 14, 2026; 30-day cure period expired without resolution.
- Merger transactions will not be consummated; Purchaser Parties reserve all rights and remedies.
- Company intends to continue evaluating opportunities to complete an initial business combination.

## SEC filing metadata
- accession: 0001829126-26-009623
- form_type: 8-K
- ticker: QUMS
- cik: 0002070900
- company_name: Quantumsphere Acquisition Corp
- filed_at: 2026-09-02T00:41:02+00:00
- event_type: m_and_a
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2070900/000182912626009623/0001829126-26-009623-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2070900/000182912626009623/quantumsphereacq_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-26-009623
- JSON: https://secwatch.observer/filing/0001829126-26-009623.json
- Plain text: https://secwatch.observer/filing/0001829126-26-009623.txt

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