{"filing":{"accession_number":"0001595974-26-000032","cik":"0001595974","ticker":"MGNI","company_name":"MAGNITE, INC.","form":"8-K","filing_date":"2026-09-21","report_date":"2026-09-21","primary_document":"mgni-20260921.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1595974/000159597426000032/mgni-20260921.htm"},"events":[{"id":34073,"run_id":31365,"accession_number":"0001595974-26-000032","anchor_item_number":"5.02","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.95,"summary":"The filing discloses the appointment of Brian Gephart as Chief Financial Officer effective October 1, 2026, and the appointment of Haas Sullivan as Chief Accounting Officer effective the same date. These are material executive appointments at the C-suite level. While the disclosure also includes compensatory arrangements (equity awards and severance agreements), the principal disclosed action centers on the appointments themselves, making exec_appointment the most salient classification.","company_name":"MAGNITE, INC.","ticker":"MGNI","filing_date":"2026-09-21","form":"8-K","submitted_at":null,"items":[{"id":37703,"accession_number":"0001595974-26-000032","item_number":"5.02","item_title":"Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"The filing discloses the appointment of Brian Gephart as Chief Financial Officer effective October 1, 2026, and the appointment of Haas Sullivan as Chief Accounting Officer effective the same date. These are material executive appointments at the C-suite level. While the disclosure also includes compensatory arrangements (equity awards and severance agreements), the principal disclosed action centers on the appointments themselves, making exec_appointment the most salient classification.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-21T21:06:50.304182+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":37703,"accession_number":"0001595974-26-000032","item_number":"5.02","item_title":"Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"The filing discloses the appointment of Brian Gephart as Chief Financial Officer effective October 1, 2026, and the appointment of Haas Sullivan as Chief Accounting Officer effective the same date. These are material executive appointments at the C-suite level. While the disclosure also includes compensatory arrangements (equity awards and severance agreements), the principal disclosed action centers on the appointments themselves, making exec_appointment the most salient classification.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-21T21:06:50.304182+00:00","company_name":"MAGNITE, INC.","ticker":"MGNI","filing_date":"2026-09-21"}]}