{"filing":{"accession_number":"0001517302-26-000120","cik":"0001517302","ticker":"APAM","company_name":"Artisan Partners Asset Management Inc.","form":"8-K","filing_date":"2026-09-10","report_date":"2026-09-10","primary_document":"apam-20260910.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1517302/000151730226000120/apam-20260910.htm"},"events":[{"id":32691,"run_id":30053,"accession_number":"0001517302-26-000120","anchor_item_number":"8.01","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"The filing discloses preliminary August 2026 AUM of $183.5 billion and a material client diversification event: a long-standing sub-advisory client is transitioning from single-manager to multi-manager structure, resulting in an anticipated $6 billion rebalancing from the Global Value strategy. This is an operational/strategic business event affecting the firm's asset base and revenue, but does not fit the specific categories of earnings release (no full financial results), material_litigation, or other named types. The disclosure is material to investors assessing the registrant's business performance and client relationships.","company_name":"Artisan Partners Asset Management Inc.","ticker":"APAM","filing_date":"2026-09-10","form":"8-K","submitted_at":null,"items":[{"id":35929,"accession_number":"0001517302-26-000120","item_number":"8.01","item_title":"Other Events","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The filing discloses preliminary August 2026 AUM of $183.5 billion and a material client diversification event: a long-standing sub-advisory client is transitioning from single-manager to multi-manager structure, resulting in an anticipated $6 billion rebalancing from the Global Value strategy. This is an operational/strategic business event affecting the firm's asset base and revenue, but does not fit the specific categories of earnings release (no full financial results), material_litigation, or other named types. The disclosure is material to investors assessing the registrant's business performance and client relationships.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-10T20:24:55.108678+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":35929,"accession_number":"0001517302-26-000120","item_number":"8.01","item_title":"Other Events","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The filing discloses preliminary August 2026 AUM of $183.5 billion and a material client diversification event: a long-standing sub-advisory client is transitioning from single-manager to multi-manager structure, resulting in an anticipated $6 billion rebalancing from the Global Value strategy. This is an operational/strategic business event affecting the firm's asset base and revenue, but does not fit the specific categories of earnings release (no full financial results), material_litigation, or other named types. The disclosure is material to investors assessing the registrant's business performance and client relationships.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-10T20:24:55.108678+00:00","company_name":"Artisan Partners Asset Management Inc.","ticker":"APAM","filing_date":"2026-09-10"}]}