{"filing":{"accession_number":"0001213900-26-104725","cik":"0002051587","ticker":"BSAAU","company_name":"BEST SPAC I Acquisition Corp.","form":"8-K","filing_date":"2026-09-29","report_date":"2026-09-29","primary_document":"ea0306891-8k_bestspac1.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/2051587/000121390026104725/ea0306891-8k_bestspac1.htm"},"events":[{"id":35800,"run_id":32994,"accession_number":"0001213900-26-104725","anchor_item_number":"5.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.92,"summary":"This disclosure describes a change of control of the Sponsor entity that holds approximately 80% of the Company's outstanding shares. Naoda Investments Limited transferred all its ordinary shares of the Sponsor to A SPAC (Holdings) Group Corp., resulting in a 100% ownership transfer of the Sponsor. This constitutes a material change in control of the registrant's parent entity and would significantly affect investor assessment of the Company's governance and control structure.","company_name":"BEST SPAC I Acquisition Corp.","ticker":"BSAAU","filing_date":"2026-09-29","form":"8-K","submitted_at":null,"items":[{"id":39987,"accession_number":"0001213900-26-104725","item_number":"5.01","item_title":"Changes in Control of Registrant.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.92,"reasoning":"This disclosure describes a change of control of the Sponsor entity that holds approximately 80% of the Company's outstanding shares. Naoda Investments Limited transferred all its ordinary shares of the Sponsor to A SPAC (Holdings) Group Corp., resulting in a 100% ownership transfer of the Sponsor. This constitutes a material change in control of the registrant's parent entity and would significantly affect investor assessment of the Company's governance and control structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-29T20:46:36.310634+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":39987,"accession_number":"0001213900-26-104725","item_number":"5.01","item_title":"Changes in Control of Registrant.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.92,"reasoning":"This disclosure describes a change of control of the Sponsor entity that holds approximately 80% of the Company's outstanding shares. Naoda Investments Limited transferred all its ordinary shares of the Sponsor to A SPAC (Holdings) Group Corp., resulting in a 100% ownership transfer of the Sponsor. This constitutes a material change in control of the registrant's parent entity and would significantly affect investor assessment of the Company's governance and control structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-29T20:46:36.310634+00:00","company_name":"BEST SPAC I Acquisition Corp.","ticker":"BSAAU","filing_date":"2026-09-29"}]}