{"filing":{"accession_number":"0001193125-26-274873","cik":"0001033767","ticker":"UMC","company_name":"UNITED MICROELECTRONICS CORP","form":"6-K","filing_date":"2026-06-18","report_date":null,"primary_document":"6k_on_06182026.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1033767/000119312526274873/6k_on_06182026.htm"},"events":[{"id":12468,"run_id":11042,"accession_number":"0001193125-26-274873","anchor_item_number":"EX-99.1","event_type":"financial_other","event_domain":"financial","is_material":true,"confidence":0.75,"summary":"UMC disposed of 2,896,036 common shares of Novatek Microelectronics Corporation on 2026/06/17–18 through conversion of zero-coupon exchangeable bonds due 2026, realizing a gain of NTD 1,007,168,830 to retained earnings. The transaction represents a material financial event (41.91% of total assets, 57.37% of shareholder equity), but it is a securities disposition rather than a discrete M\u0026A activity, debt issuance, or other named financial event type. This is classified as `financial_other` because it is clearly a financial transaction but does not fit the specific categories of M\u0026A, debt, dividend, or impairment.","company_name":"UNITED MICROELECTRONICS CORP","ticker":"UMC","filing_date":"2026-06-18","form":"6-K","submitted_at":null,"items":[{"id":9326,"accession_number":"0001193125-26-274873","item_number":"EX-99.1","item_title":"umc-ex99_1.htm","event_type":"financial_other","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"UMC disposed of 2,896,036 common shares of Novatek Microelectronics Corporation on 2026/06/17–18 through conversion of zero-coupon exchangeable bonds due 2026, realizing a gain of NTD 1,007,168,830 to retained earnings. The transaction represents a material financial event (41.91% of total assets, 57.37% of shareholder equity), but it is a securities disposition rather than a discrete M\u0026A activity, debt issuance, or other named financial event type. This is classified as `financial_other` because it is clearly a financial transaction but does not fit the specific categories of M\u0026A, debt, dividend, or impairment.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-06-22T02:52:33.037922+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":9326,"accession_number":"0001193125-26-274873","item_number":"EX-99.1","item_title":"umc-ex99_1.htm","event_type":"financial_other","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"UMC disposed of 2,896,036 common shares of Novatek Microelectronics Corporation on 2026/06/17–18 through conversion of zero-coupon exchangeable bonds due 2026, realizing a gain of NTD 1,007,168,830 to retained earnings. The transaction represents a material financial event (41.91% of total assets, 57.37% of shareholder equity), but it is a securities disposition rather than a discrete M\u0026A activity, debt issuance, or other named financial event type. This is classified as `financial_other` because it is clearly a financial transaction but does not fit the specific categories of M\u0026A, debt, dividend, or impairment.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-06-22T02:52:33.037922+00:00","company_name":"UNITED MICROELECTRONICS CORP","ticker":"UMC","filing_date":"2026-06-18"}]}