{"filing":{"accession_number":"0001193125-26-281028","cik":"0001190935","ticker":"PTY","company_name":"PIMCO CORPORATE \u0026 INCOME OPPORTUNITY FUND","form":"8-K","filing_date":"2026-06-24","report_date":null,"primary_document":"d162202d8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1190935/000119312526281028/d162202d8k.htm"},"events":[{"id":13476,"run_id":11975,"accession_number":"0001193125-26-281028","anchor_item_number":"8.01","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"The Fund disclosed material changes to its principal investment strategy effective June 24, 2026 and July 24, 2026, permitting it to invest in and/or originate loans (including subprime loans) and to invest without limitation in defaulted bonds. These are significant operational and strategic expansions of the Fund's investment mandate that would affect a reasonable investor's assessment of the Fund's risk profile and investment approach, disclosed via prospectus supplement (Exhibit 99.1).","company_name":"PIMCO CORPORATE \u0026 INCOME OPPORTUNITY FUND","ticker":"PTY","filing_date":"2026-06-24","form":"8-K","submitted_at":null,"items":[{"id":10618,"accession_number":"0001193125-26-281028","item_number":"8.01","item_title":"Other Events.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The Fund disclosed material changes to its principal investment strategy effective June 24, 2026 and July 24, 2026, permitting it to invest in and/or originate loans (including subprime loans) and to invest without limitation in defaulted bonds. These are significant operational and strategic expansions of the Fund's investment mandate that would affect a reasonable investor's assessment of the Fund's risk profile and investment approach, disclosed via prospectus supplement (Exhibit 99.1).","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-24T20:05:39.682082+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":10618,"accession_number":"0001193125-26-281028","item_number":"8.01","item_title":"Other Events.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The Fund disclosed material changes to its principal investment strategy effective June 24, 2026 and July 24, 2026, permitting it to invest in and/or originate loans (including subprime loans) and to invest without limitation in defaulted bonds. These are significant operational and strategic expansions of the Fund's investment mandate that would affect a reasonable investor's assessment of the Fund's risk profile and investment approach, disclosed via prospectus supplement (Exhibit 99.1).","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-24T20:05:39.682082+00:00","company_name":"PIMCO CORPORATE \u0026 INCOME OPPORTUNITY FUND","ticker":"PTY","filing_date":"2026-06-24"}]}