Quantumsphere Acquisition Corp SEC EDGAR Filings (CIK 0002070900)

SEC EDGAR filings, ownership reports, and insider transactions for Quantumsphere Acquisition Corp.

Symbol
QUMS, QUMSR, QUMSU on Nasdaq
Industry
Blank Checks (Office Of Real Estate & Construction)
Business address
1185 6 Th Ave., Suite 304, New York, NY, 10036
State of incorporation
Cayman Islands
Fiscal year end
31 March
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Quantumsphere Acquisition Corp has filed 30 SEC EDGAR filings since 30 May 2025

Latest Filings

Recent SEC filings for Quantumsphere Acquisition Corp including 10-Q, SCHEDULE 13G, 8-K/A and more.

Form type Document Filing Description Filing date Reporting date File number(s)
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Nov 2025 30 Sep 2025 001-42787
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Nov 2025 005-95229
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 07 Nov 2025 005-95229
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A 8-K/A 10 Oct 2025 07 Aug 2025 001-42787
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Oct 2025 03 Oct 2025 001-42787
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Sep 2025 26 Sep 2025 001-42787
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 19 Sep 2025 30 Jun 2025 001-42787
SCHEDULE 13D Open SCHEDULE 13D document View SEC filing for SCHEDULE 13D 15 Sep 2025 005-95229
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Aug 2025 07 Aug 2025 001-42787
3 Open 3 document View SEC filing for 3 FORM 3 12 Aug 2025 05 Aug 2025
3 Open 3 document View SEC filing for 3 FORM 3 11 Aug 2025 05 Aug 2025
3 Open 3 document View SEC filing for 3 FORM 3 11 Aug 2025 05 Aug 2025
3 Open 3 document View SEC filing for 3 FORM 3 11 Aug 2025 05 Aug 2025
3 Open 3 document View SEC filing for 3 FORM 3 11 Aug 2025 05 Aug 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 Aug 2025 05 Aug 2025 001-42787
424B4 Open 424B4 document View SEC filing for 424B4 424B4 07 Aug 2025 333-287672
S-1MEF Open S-1MEF document | Open XBRL data View SEC filing for S-1MEF S-1MEF 06 Aug 2025 333-289288
CERT Open CERT document View SEC filing for CERT 06 Aug 2025 001-42787
EFFECT Open EFFECT document View SEC filing for EFFECT 05 Aug 2025 333-287672
8-A12B Open 8-A12B document View SEC filing for 8-A12B 8-A12B 05 Aug 2025 001-42787
CORRESP Open CORRESP document View SEC filing for CORRESP 01 Aug 2025
CORRESP Open CORRESP document View SEC filing for CORRESP 01 Aug 2025
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 30 Jul 2025 333-287672
CORRESP Open CORRESP document View SEC filing for CORRESP 29 Jul 2025
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 28 Jul 2025 333-287672
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 24 Jul 2025 333-287672
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 10 Jul 2025 333-287672
CORRESP Open CORRESP document View SEC filing for CORRESP 10 Jul 2025
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 24 Jun 2025 333-287672
S-1 Open S-1 document View SEC filing for S-1 S-1 30 May 2025 333-287672

About this filer

Quantumsphere Acquisition Corp files with the SEC under CIK 0002070900. This page aggregates EDGAR filings and related ownership activity.

Industry: Blank Checks.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.

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