{"filing":{"accession_number":"0001888524-26-016493","cik":"0001634172","ticker":null,"company_name":"CSAIL 2015-C1 Commercial Mortgage Trust","form":"8-K","filing_date":"2026-09-01","report_date":"2026-09-01","primary_document":"csc15sa1_8k-09012026.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1634172/000188852426016493/csc15sa1_8k-09012026.htm"},"events":[{"id":30999,"run_id":28429,"accession_number":"0001888524-26-016493","anchor_item_number":"6.02","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"summary":"This disclosure reports a change of special servicer under Item 6.02, with Greystone Servicing Company LLC's special servicing division assets and duties transferred to C-IV Asset Management LLC effective September 1, 2026. The transaction involves approximately $20.7 billion in aggregate stated principal balance across 60 transactions and 1,928 first-lien mortgage loans. While the new servicer has appropriate ratings (MOR CS2 from Morningstar DBRS, CSS2 from Fitch) and the key personnel transitioned, this represents a material governance change affecting the trust's operational structure and loan servicing oversight, warranting classification as a governance event material to certificateholders.","company_name":"CSAIL 2015-C1 Commercial Mortgage Trust","ticker":null,"filing_date":"2026-09-01","form":"8-K","submitted_at":null,"items":[{"id":33767,"accession_number":"0001888524-26-016493","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 disclosure reports a change of special servicer under Item 6.02, with Greystone Servicing Company LLC's special servicing division assets and duties transferred to C-IV Asset Management LLC effective September 1, 2026. The transaction involves approximately $20.7 billion in aggregate stated principal balance across 60 transactions and 1,928 first-lien mortgage loans. While the new servicer has appropriate ratings (MOR CS2 from Morningstar DBRS, CSS2 from Fitch) and the key personnel transitioned, this represents a material governance change affecting the trust's operational structure and loan servicing oversight, warranting classification as a governance event material to certificateholders.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-01T20:27:16.789829+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":33767,"accession_number":"0001888524-26-016493","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 disclosure reports a change of special servicer under Item 6.02, with Greystone Servicing Company LLC's special servicing division assets and duties transferred to C-IV Asset Management LLC effective September 1, 2026. The transaction involves approximately $20.7 billion in aggregate stated principal balance across 60 transactions and 1,928 first-lien mortgage loans. While the new servicer has appropriate ratings (MOR CS2 from Morningstar DBRS, CSS2 from Fitch) and the key personnel transitioned, this represents a material governance change affecting the trust's operational structure and loan servicing oversight, warranting classification as a governance event material to certificateholders.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-01T20:27:16.789829+00:00","company_name":"CSAIL 2015-C1 Commercial Mortgage Trust","ticker":null,"filing_date":"2026-09-01"}]}