{"filing":{"accession_number":"0001193125-26-263845","cik":"0001004434","ticker":"MGRB","company_name":"AFFILIATED MANAGERS GROUP, INC.","form":"8-K","filing_date":"2026-06-09","report_date":null,"primary_document":"d155271d8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1004434/000119312526263845/d155271d8k.htm"},"events":[{"id":5929,"run_id":5202,"accession_number":"0001193125-26-263845","anchor_item_number":"1.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"Affiliated Managers Group entered into a Fourth Amended and Restated Credit Agreement on June 9, 2026, establishing a $1.25 billion senior unsecured multicurrency revolving credit facility maturing in 2031, with an option to increase commitments by up to $750 million. This refinancing and amendment of the existing credit facility constitutes a material definitive agreement affecting the Company's capital structure and financial flexibility.","company_name":"AFFILIATED MANAGERS GROUP, INC.","ticker":"MGRB","filing_date":"2026-06-09","form":"8-K","submitted_at":null,"items":[{"id":5574,"accession_number":"0001193125-26-263845","item_number":"1.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The Company entered into a Fourth Amended and Restated Credit Agreement on June 9, 2026, providing a $1.25 billion senior unsecured multicurrency revolving credit facility maturing in 2031, with an option to increase commitments by up to $750 million. While this is a refinancing/amendment of an existing credit facility rather than a traditional M\u0026A transaction, it constitutes a material definitive agreement under Item 1.01 that would affect a reasonable investor's assessment of the Company's capital structure and financial flexibility. The substantial size and multi-year maturity make this material, though the event is more accurately a material financing arrangement than a classic M\u0026A activity.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-09T20:33:01.031700+00:00","company_name":"","ticker":null,"filing_date":""},{"id":5575,"accession_number":"0001193125-26-263845","item_number":"2.03","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"Item 2.03 discloses creation of a direct financial obligation and incorporates Item 1.01 by reference. Item 1.01 typically covers material acquisitions, dispositions, or changes of control. The cross-reference structure indicates a material M\u0026A transaction that creates new financial obligations for the registrant.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-09T20:33:01.031700+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":5574,"accession_number":"0001193125-26-263845","item_number":"1.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The Company entered into a Fourth Amended and Restated Credit Agreement on June 9, 2026, providing a $1.25 billion senior unsecured multicurrency revolving credit facility maturing in 2031, with an option to increase commitments by up to $750 million. While this is a refinancing/amendment of an existing credit facility rather than a traditional M\u0026A transaction, it constitutes a material definitive agreement under Item 1.01 that would affect a reasonable investor's assessment of the Company's capital structure and financial flexibility. The substantial size and multi-year maturity make this material, though the event is more accurately a material financing arrangement than a classic M\u0026A activity.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-09T20:33:01.031700+00:00","company_name":"AFFILIATED MANAGERS GROUP, INC.","ticker":"MGRB","filing_date":"2026-06-09"},{"id":5575,"accession_number":"0001193125-26-263845","item_number":"2.03","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"Item 2.03 discloses creation of a direct financial obligation and incorporates Item 1.01 by reference. Item 1.01 typically covers material acquisitions, dispositions, or changes of control. The cross-reference structure indicates a material M\u0026A transaction that creates new financial obligations for the registrant.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-09T20:33:01.031700+00:00","company_name":"AFFILIATED MANAGERS GROUP, INC.","ticker":"MGRB","filing_date":"2026-06-09"}]}