{"filing":{"accession_number":"0001888524-26-016518","cik":"0001840121","ticker":null,"company_name":"BANK 2021-BNK31","form":"8-K","filing_date":"2026-09-02","report_date":"2026-09-01","primary_document":"wcm21b31_8k-09012026.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1840121/000188852426016518/wcm21b31_8k-09012026.htm"},"events":[{"id":31207,"run_id":28627,"accession_number":"0001888524-26-016518","anchor_item_number":"6.02","event_type":"governance_other","event_domain":"governance","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 approximately 60 transactions representing $20.7 billion in aggregate principal balance as of June 30, 2026. While the filing provides extensive operational and financial details about C-IV AM's qualifications and track record, the core event is a material change in the governance and operational control of the securitization's servicing function. This is material to certificateholders because servicer quality and continuity directly affect loan performance and recovery outcomes.","company_name":"BANK 2021-BNK31","ticker":null,"filing_date":"2026-09-02","form":"8-K","submitted_at":null,"items":[{"id":34027,"accession_number":"0001888524-26-016518","item_number":"6.02","item_title":"Change of Servicer or Trustee.","event_type":"governance_other","event_domain":"governance","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 approximately 60 transactions representing $20.7 billion in aggregate principal balance as of June 30, 2026. While the filing provides extensive operational and financial details about C-IV AM's qualifications and track record, the core event is a material change in the governance and operational control of the securitization's servicing function. This is material to certificateholders because servicer quality and continuity directly affect loan performance and recovery outcomes.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-02T13:18:44.087896+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":34027,"accession_number":"0001888524-26-016518","item_number":"6.02","item_title":"Change of Servicer or Trustee.","event_type":"governance_other","event_domain":"governance","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 approximately 60 transactions representing $20.7 billion in aggregate principal balance as of June 30, 2026. While the filing provides extensive operational and financial details about C-IV AM's qualifications and track record, the core event is a material change in the governance and operational control of the securitization's servicing function. This is material to certificateholders because servicer quality and continuity directly affect loan performance and recovery outcomes.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-02T13:18:44.087896+00:00","company_name":"BANK 2021-BNK31","ticker":null,"filing_date":"2026-09-02"}]}