{"data":[{"accessionNo":"0002012383-26-001777","formType":"SCHEDULE 13G/A","amendmentNo":3,"issuerCik":"0001033767","issuerName":"UNITED MICROELECTRONICS CORP","ticker":"UMC","cusip":"Y92370108","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"BlackRock, Inc.","reportingCik":null,"personType":"HC","sharesOwned":817485069,"percentOfClass":6.5,"filedAt":"2026-04-29"}],"updatedAt":"2026-10-14T18:55:53.068Z","source":"xoomar.com","docs":"https://xoomar.com/markets/api","license":"https://xoomar.com/terms","attribution":"Credit XOOMAR with a link to the dataset page on xoomar.com when you republish this data","meta":{"source":"SEC","sourceAttribution":"Schedule 13D and 13G data: SEC.","notice":"10 requests a minute without a key, 30 with a free key. Get a free key at https://xoomar.com/signup?utm_source=api, register your app at https://xoomar.com/developers/register?utm_source=api, and credit the data as \"Data: XOOMAR\" together with the sourceAttribution line."}}