{"schema_version":"secwatch.filing_event.v1","accession":"0001595974-25-000030","form_type":"8-K","ticker":"MGNI","cik":"0001595974","company_name":"MAGNITE, INC.","filed_at":"2025-09-05T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.456091+00:00","generated_at":"2026-05-17T07:57:37.795984+00:00","sec_items":["1.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"medium","headline":"Magnite expands office sublease with Zillow, adding 8th floor space","bullets":["Entered First Amendment to Sublease with Zillow Group, effective November 1, 2025.","Adds entire 8th floor to previously leased 9th floor premises.","Full terms of the amendment to be filed in Q3 2025 10-Q.","No financial terms (rent, square footage) disclosed in this 8-K."],"urls":{"canonical":"https://secwatch.observer/filing/0001595974-25-000030","json":"https://secwatch.observer/filing/0001595974-25-000030.json","markdown":"https://secwatch.observer/filing/0001595974-25-000030.md","text":"https://secwatch.observer/filing/0001595974-25-000030.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1595974/000159597425000030/0001595974-25-000030-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1595974/000159597425000030/mgni-20250831.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T07:57:37.795984+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}