{"filing":{"accession_number":"0001888524-26-016522","cik":"0001996001","ticker":null,"company_name":"BANK5 2023-5YR4","form":"8-K","filing_date":"2026-09-02","report_date":"2026-09-01","primary_document":"bak23yr4_8k-09012026.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1996001/000188852426016522/bak23yr4_8k-09012026.htm"},"events":[{"id":31209,"run_id":28629,"accession_number":"0001888524-26-016522","anchor_item_number":"6.02","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"This Item 6.02 discloses a change of servicer in a mortgage-backed securitization: Greystone Servicing Company LLC sold its special servicing division to C-IV Asset Management LLC, which assumed all duties and liabilities as special servicer for the BANK5 2023-5YR3 securitization effective September 1, 2026. The disclosure includes detailed information about C-IV AM's qualifications, experience (6,017 resolved assets totaling $60.7 billion), ratings, and the portfolio being transferred ($20.7 billion aggregate principal balance across 60 transactions). While this is a servicer transition rather than a traditional operational event, it is material to certificateholders as it affects the entity responsible for managing and resolving problem loans in the securitized pool.","company_name":"BANK5 2023-5YR4","ticker":null,"filing_date":"2026-09-02","form":"8-K","submitted_at":null,"items":[{"id":34029,"accession_number":"0001888524-26-016522","item_number":"6.02","item_title":"Change of Servicer or Trustee.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"This Item 6.02 discloses a change of servicer in a mortgage-backed securitization: Greystone Servicing Company LLC sold its special servicing division to C-IV Asset Management LLC, which assumed all duties and liabilities as special servicer for the BANK5 2023-5YR3 securitization effective September 1, 2026. The disclosure includes detailed information about C-IV AM's qualifications, experience (6,017 resolved assets totaling $60.7 billion), ratings, and the portfolio being transferred ($20.7 billion aggregate principal balance across 60 transactions). While this is a servicer transition rather than a traditional operational event, it is material to certificateholders as it affects the entity responsible for managing and resolving problem loans in the securitized pool.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-02T13:24:38.076067+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":34029,"accession_number":"0001888524-26-016522","item_number":"6.02","item_title":"Change of Servicer or Trustee.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"This Item 6.02 discloses a change of servicer in a mortgage-backed securitization: Greystone Servicing Company LLC sold its special servicing division to C-IV Asset Management LLC, which assumed all duties and liabilities as special servicer for the BANK5 2023-5YR3 securitization effective September 1, 2026. The disclosure includes detailed information about C-IV AM's qualifications, experience (6,017 resolved assets totaling $60.7 billion), ratings, and the portfolio being transferred ($20.7 billion aggregate principal balance across 60 transactions). While this is a servicer transition rather than a traditional operational event, it is material to certificateholders as it affects the entity responsible for managing and resolving problem loans in the securitized pool.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-02T13:24:38.076067+00:00","company_name":"BANK5 2023-5YR4","ticker":null,"filing_date":"2026-09-02"}]}