Quantumsphere Acquisition Corp
23 SEC EDGAR filings indexed (CIK 0002070900) across 9 form types.
Filing profile
Quantumsphere Acquisition Corp (QUMS) has 23 SEC filings indexed on SecFilingDex, across 9 form types filed over roughly 1 year, from May 30, 2025 to August 14, 2026. The filer is classified under Blank Checks (SIC 6770).
Its most frequent disclosure is the 8-K (Material event) with 6 filings — Current report announcing a material event, such as an acquisition, executive change, or earnings release. 12 of these filings were disclosed in the twelve months to August 14, 2026. 5 of the 23 are amendments (a corrected or updated version of an earlier filing).
Disclosure mix
- 68-KMaterial event · event-driven
- 5Form 3Initial insider ownership · within 10 days of becoming an insider
- 410-QQuarterly report · quarterly
- 3S-1/AIPO registration · event-driven (pre-ipo)
- 110-K/AAnnual report · annual
- 110-KAnnual report · annual
- 18-K/AMaterial event · event-driven
- 1424B4Final prospectus · event-driven
- 1S-1IPO registration · event-driven (pre-ipo)
Profile derived from 23 indexed filings; every figure traces to the filing records above, each linking back to its original SEC EDGAR document. Filing counts reflect SecFilingDex's current index, not the filer's complete EDGAR history.
All filings
- 10-QQuarterly report · period of report Jun 30, 2026Filed · 0001829126-26-008874
- 10-K/AAnnual reportFiled · 0001829126-26-007147
- 10-KAnnual report · period of report Mar 31, 2026Filed · 0001829126-26-006482
- 8-KMaterial event · period of report Mar 3, 2026Filed · 0001829126-26-002191
- 10-QQuarterly report · period of report Dec 31, 2025Filed · 0001829126-26-001512
- 8-KMaterial event · period of report Jan 13, 2026Filed · 0001829126-26-000503
- 10-QQuarterly report · period of report Sep 30, 2025Filed · 0001829126-25-009212
- 8-K/AMaterial event · period of report Aug 7, 2025Filed · 0001829126-25-008044
- 8-KMaterial event · period of report Oct 3, 2025Filed · 0001829126-25-007899
- 8-KMaterial event · period of report Sep 26, 2025Filed · 0001829126-25-007682
- 10-QQuarterly report · period of report Jun 30, 2025Filed · 0001829126-25-007505
- 8-KMaterial event · period of report Aug 7, 2025Filed · 0001829126-25-006233
- Form 3Initial insider ownership · period of report Aug 5, 2025Filed · 0001829126-25-006134
- Form 3Initial insider ownership · period of report Aug 5, 2025Filed · 0001829126-25-006070
- Form 3Initial insider ownership · period of report Aug 5, 2025Filed · 0001829126-25-006071
- Form 3Initial insider ownership · period of report Aug 5, 2025Filed · 0001829126-25-006072
- Form 3Initial insider ownership · period of report Aug 5, 2025Filed · 0001829126-25-006073
- 424B4Final prospectusFiled · 0001829126-25-005885
- 8-KMaterial event · period of report Aug 5, 2025Filed · 0001829126-25-005919
- S-1/AIPO registrationFiled · 0001829126-25-005566
- S-1/AIPO registrationFiled · 0001829126-25-005327
- S-1/AIPO registrationFiled · 0001829126-25-005004
- S-1IPO registrationFiled · 0001829126-25-004085
Authoritative source
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