---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-25-006233"
form_type: "8-K"
ticker: "QUMS"
cik: "0002070900"
company_name: "Quantumsphere Acquisition Corp"
filed_at: "2025-08-14T23:59:59+00:00"
generated_at: "2026-05-17T13:41:08.030143+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Quantumsphere Acquisition Corp completes IPO of 8.28M units ($82.8M) with full over-allotment

## Summary
- IPO of 8,280,000 units at $10/unit, including full exercise of underwriter over-allotment of 1,080,000 units.
- Simultaneous private placement of 228,650 units to Sponsor for $2,286,500.
- Net proceeds of $82.8M placed in trust account for public shareholders.
- Audited balance sheet shows $902,598 cash outside trust, accumulated deficit of $2,216,166, and total shareholders' deficit of $2,215,853.
- Auditor's report includes going concern note due to lack of capital to fund operations and 18-month deadline to complete business combination by February 7, 2027.

## SEC filing metadata
- accession: 0001829126-25-006233
- form_type: 8-K
- ticker: QUMS
- cik: 0002070900
- company_name: Quantumsphere Acquisition Corp
- filed_at: 2025-08-14T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2070900/000182912625006233/0001829126-25-006233-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2070900/000182912625006233/quantumsphereacq_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-25-006233
- JSON: https://secwatch.observer/filing/0001829126-25-006233.json
- Plain text: https://secwatch.observer/filing/0001829126-25-006233.txt

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