{"schema_version":"secwatch.filing_event.v1","accession":"0001829126-25-005919","form_type":"8-K","ticker":"QUMS","cik":"0002070900","company_name":"Quantumsphere Acquisition Corp","filed_at":"2025-08-07T23:59:59+00:00","discovered_at":"2026-05-14T18:02:45.941042+00:00","generated_at":"2026-05-17T18:32:36.812473+00:00","sec_items":["1.01","3.02","5.02","5.03","8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Quantumsphere closes $82.8M IPO including full over-allotment; units begin trading","bullets":["Closed IPO of 8,280,000 units at $10.00/unit, including full exercise of over-allotment, for gross proceeds of $82.8M.","Net proceeds of $82.8M placed in trust account for benefit of public shareholders.","Simultaneous private placement of 228,650 units to sponsor Whiteowl Holdings for $2.2865M.","Appointed Wei (Victor) Zhang, Daniel M. McCabe, and Qi Gong to board and audit/compensation committees.","Units trade on Nasdaq under QUMSU; ordinary shares and rights expected to trade separately as QUMS and QUMSR."],"urls":{"canonical":"https://secwatch.observer/filing/0001829126-25-005919","json":"https://secwatch.observer/filing/0001829126-25-005919.json","markdown":"https://secwatch.observer/filing/0001829126-25-005919.md","text":"https://secwatch.observer/filing/0001829126-25-005919.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2070900/000182912625005919/0001829126-25-005919-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2070900/000182912625005919/quantumsphereacq_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T18:32:36.812473+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"316d942889afa379132701e7dacf68c1c08b54af","claim":"Quantumsphere Acquisition Corp: Adopted Third Amended and Restated Memorandum and Articles of Association (effective 2025-08-05).","evidence_excerpt":"On August 5, 2025, the Company adopted its Third Amended and Restated Memorandum and Articles of Association.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/2070900/000182912625005919/0001829126-25-005919-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2025-08-05"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}