{"filing":{"accession_number":"0001213900-26-067269","cik":"0002102771","ticker":"KEYY","company_name":"Keystone Acquisition Corp.","form":"8-K","filing_date":"2026-06-10","report_date":null,"primary_document":"ea0294122-8k_keystone.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/2102771/000121390026067269/ea0294122-8k_keystone.htm"},"events":[{"id":5695,"run_id":4988,"accession_number":"0001213900-26-067269","anchor_item_number":"8.01","event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"summary":"This disclosure reports the consummation of Keystone Acquisition Corp.'s IPO on June 4, 2026, generating $287.5 million in gross proceeds from 28.75 million units, plus a concurrent private placement of 8.47 million warrants for $8.47 million. While the IPO itself is a material capital-raising event, the filing is structured as Item 8.01 (Other Events) rather than Item 2.01 (Completion of Acquisition or Disposition) or a dedicated IPO item, and the disclosure focuses on confirming previously reported facts rather than announcing new material developments. The event is material to investors but does not fit cleanly into the earnings_release, ma_activity, or dilutive_issuance categories as typically understood in the taxonomy.","company_name":"Keystone Acquisition Corp.","ticker":"KEYY","filing_date":"2026-06-10","form":"8-K","submitted_at":null,"items":[{"id":5788,"accession_number":"0001213900-26-067269","item_number":"8.01","item_title":"Other Events.","event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"reasoning":"This disclosure reports the consummation of Keystone Acquisition Corp.'s IPO on June 4, 2026, generating $287.5 million in gross proceeds from 28.75 million units, plus a concurrent private placement of 8.47 million warrants for $8.47 million. While the IPO itself is a material capital-raising event, the filing is structured as Item 8.01 (Other Events) rather than Item 2.01 (Completion of Acquisition or Disposition) or a dedicated IPO item, and the disclosure focuses on confirming previously reported facts rather than announcing new material developments. The event is material to investors but does not fit cleanly into the earnings_release, ma_activity, or dilutive_issuance categories as typically understood in the taxonomy.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-10T19:09:07.059586+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":5788,"accession_number":"0001213900-26-067269","item_number":"8.01","item_title":"Other Events.","event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"reasoning":"This disclosure reports the consummation of Keystone Acquisition Corp.'s IPO on June 4, 2026, generating $287.5 million in gross proceeds from 28.75 million units, plus a concurrent private placement of 8.47 million warrants for $8.47 million. While the IPO itself is a material capital-raising event, the filing is structured as Item 8.01 (Other Events) rather than Item 2.01 (Completion of Acquisition or Disposition) or a dedicated IPO item, and the disclosure focuses on confirming previously reported facts rather than announcing new material developments. The event is material to investors but does not fit cleanly into the earnings_release, ma_activity, or dilutive_issuance categories as typically understood in the taxonomy.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-10T19:09:07.059586+00:00","company_name":"Keystone Acquisition Corp.","ticker":"KEYY","filing_date":"2026-06-10"}]}