{"filing":{"accession_number":"0001888524-26-016549","cik":"0001780131","ticker":null,"company_name":"BBCMS Mortgage Trust 2019-C4","form":"8-K","filing_date":"2026-09-02","report_date":"2026-09-01","primary_document":"bub19c04_8k-09012026.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1780131/000188852426016549/bub19c04_8k-09012026.htm"},"events":[{"id":31230,"run_id":28649,"accession_number":"0001888524-26-016549","anchor_item_number":"6.02","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"summary":"This Item 6.02 discloses a change of special servicer for the mortgage loan pool, with Greystone Servicing Company LLC's special servicing division assets and responsibilities transferred to C-IV Asset Management LLC effective September 1, 2026. The filing provides extensive detail on C-IV AM's qualifications, experience (6,017 resolved assets totaling $60.7 billion), ratings (MOR CS2, CSS2, S\u0026P Select Servicer), and the scope of the transferred portfolio ($20.7 billion aggregate principal balance across 60 transactions). While this is a servicer change rather than a traditional governance event, it is a material structural change to the trust's administration and would affect investor assessment of loan servicing quality and performance.","company_name":"BBCMS Mortgage Trust 2019-C4","ticker":null,"filing_date":"2026-09-02","form":"8-K","submitted_at":null,"items":[{"id":34050,"accession_number":"0001888524-26-016549","item_number":"6.02","item_title":"Change of Servicer or Trustee.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"This Item 6.02 discloses a change of special servicer for the mortgage loan pool, with Greystone Servicing Company LLC's special servicing division assets and responsibilities transferred to C-IV Asset Management LLC effective September 1, 2026. The filing provides extensive detail on C-IV AM's qualifications, experience (6,017 resolved assets totaling $60.7 billion), ratings (MOR CS2, CSS2, S\u0026P Select Servicer), and the scope of the transferred portfolio ($20.7 billion aggregate principal balance across 60 transactions). While this is a servicer change rather than a traditional governance event, it is a material structural change to the trust's administration and would affect investor assessment of loan servicing quality and performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-02T14:07:39.712133+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":34050,"accession_number":"0001888524-26-016549","item_number":"6.02","item_title":"Change of Servicer or Trustee.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"This Item 6.02 discloses a change of special servicer for the mortgage loan pool, with Greystone Servicing Company LLC's special servicing division assets and responsibilities transferred to C-IV Asset Management LLC effective September 1, 2026. The filing provides extensive detail on C-IV AM's qualifications, experience (6,017 resolved assets totaling $60.7 billion), ratings (MOR CS2, CSS2, S\u0026P Select Servicer), and the scope of the transferred portfolio ($20.7 billion aggregate principal balance across 60 transactions). While this is a servicer change rather than a traditional governance event, it is a material structural change to the trust's administration and would affect investor assessment of loan servicing quality and performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-02T14:07:39.712133+00:00","company_name":"BBCMS Mortgage Trust 2019-C4","ticker":null,"filing_date":"2026-09-02"}]}