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QUMS

Quantumsphere Acquisition Corp SEC filings
Blank Checks · Nasdaq, Nasdaq, Nasdaq · Incorporated in Cayman Islands
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Filing history
2026-10-13
425 425
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2026-10-13
Current report 8-K
Material agreementReg FD disclosure
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2026-10-06
Passive 5%+ stake update SCHEDULE 13G/A
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2026-09-02
Current report 8-K
Agreement ended
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2026-08-14
Quarterly report 10-Q
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2026-08-06
Passive 5%+ stake SCHEDULE 13G
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2026-07-01
Annual report (amended) 10-K/A
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2026-06-15
Annual report 10-K
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2026-03-11
Current report 8-K
Material agreement
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2026-02-20
Quarterly report 10-Q
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2026-02-17
Passive 5%+ stake update SCHEDULE 13G/A
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2026-02-17
Late quarterly report NT 10-Q
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2026-02-12
Passive 5%+ stake SCHEDULE 13G
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2026-01-23
Current report 8-K
Material agreement
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2025-11-14
Quarterly report 10-Q
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2025-11-14
Passive 5%+ stake SCHEDULE 13G
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2025-11-07
Passive 5%+ stake SCHEDULE 13G
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2025-10-10
Current report (amended) 8-K/A
Other event
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2025-10-06
Current report 8-K
Material agreementReg FD disclosure
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2025-09-29
Current report 8-K
Other event
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2025-09-19
Quarterly report 10-Q
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2025-09-15
5%+ stake, may push for changes SCHEDULE 13D
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2025-08-14
Current report 8-K
Other event
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2025-08-12
New insider's holdings 3
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2025-08-11
New insider's holdings 3
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2025-08-11
New insider's holdings 3
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2025-08-11
New insider's holdings 3
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2025-08-11
New insider's holdings 3
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2025-08-07
Current report 8-K
Material agreementShare sale (dilution)Exec/director changeBylaws changeOther event
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2025-08-07
Prospectus 424B4
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2025-08-06
S-1MEF S-1MEF
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2025-08-06
CERT CERT
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2025-08-05
EFFECT EFFECT
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2025-08-05
8-A12B 8-A12B
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2025-08-01
CORRESP CORRESP
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2025-08-01
CORRESP CORRESP
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2025-07-30
S-1/A S-1/A
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2025-07-29
CORRESP CORRESP
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2025-07-28
UPLOAD UPLOAD
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2025-07-24
S-1/A S-1/A
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