{"cik":1595974,"company":{"entity_status":"ACTIVE","filings":[{"accession":"0001966857-26-000013","document":"xslF345X06/wk-form4_1788468980.xml","filed":"2026-09-03","form":"4","items":"","report_date":"2026-09-01"},{"accession":"0001781873-26-000003","document":"xslF345X06/wk-form4_1787956571.xml","filed":"2026-08-28","form":"4","items":"","report_date":"2026-08-26"},{"accession":"0001966857-26-000011","document":"xslF345X06/wk-form4_1787084710.xml","filed":"2026-08-18","form":"4","items":"","report_date":"2026-08-15"},{"accession":"0001865116-26-000009","document":"xslF345X06/wk-form4_1787084076.xml","filed":"2026-08-18","form":"4","items":"","report_date":"2026-08-15"},{"accession":"0001807986-26-000007","document":"xslF345X06/wk-form4_1787084484.xml","filed":"2026-08-18","form":"4","items":"","report_date":"2026-08-15"},{"accession":"0001778484-26-000008","document":"xslF345X06/wk-form4_1787084411.xml","filed":"2026-08-18","form":"4","items":"","report_date":"2026-08-15"},{"accession":"0001700262-26-000009","document":"xslF345X06/wk-form4_1787084592.xml","filed":"2026-08-18","form":"4","items":"","report_date":"2026-08-15"},{"accession":"0001523288-26-000010","document":"xslF345X06/wk-form4_1787084266.xml","filed":"2026-08-18","form":"4","items":"","report_date":"2026-08-15"},{"accession":"0001628280-26-053343","document":"mgni-20260630.htm","filed":"2026-08-05","form":"10-Q","items":"","report_date":"2026-06-30"},{"accession":"0001628280-26-053334","document":"mgni-20260805.htm","filed":"2026-08-05","form":"8-K","items":"2.02,9.01","report_date":"2026-08-05"},{"accession":"0001628280-26-042512","document":"mgni-20260608.htm","filed":"2026-06-11","form":"8-K","items":"5.07","report_date":"2026-06-08"},{"accession":"0001595974-26-000023","document":"mgni-20260506.htm","filed":"2026-05-06","form":"8-K","items":"2.02,9.01","report_date":"2026-05-06"},{"accession":"0001595974-26-000022","document":"mgni-20260331.htm","filed":"2026-05-06","form":"10-Q","items":"","report_date":"2026-03-31"},{"accession":"0001999371-26-008635","document":"mgni-def14a_060826.htm","filed":"2026-04-21","form":"DEF 14A","items":"","report_date":"2026-06-08"},{"accession":"0001595974-26-000016","document":"mgni-20260420.htm","filed":"2026-04-20","form":"8-K","items":"5.02,7.01,9.01","report_date":"2026-04-20"},{"accession":"0001595974-26-000013","document":"mgni-20260407.htm","filed":"2026-04-10","form":"8-K","items":"5.02","report_date":"2026-04-07"},{"accession":"0001595974-26-000010","document":"mgni-20260225.htm","filed":"2026-02-25","form":"8-K","items":"2.02,9.01","report_date":"2026-02-25"},{"accession":"0001595974-26-000007","document":"mgni-20251231.htm","filed":"2026-02-25","form":"10-K","items":"","report_date":"2025-12-31"},{"accession":"0001595974-25-000043","document":"mgni-20250930.htm","filed":"2025-11-05","form":"10-Q","items":"","report_date":"2025-09-30"},{"accession":"0001595974-25-000041","document":"mgni-20251105.htm","filed":"2025-11-05","form":"8-K","items":"2.02,9.01","report_date":"2025-11-05"},{"accession":"0001595974-25-000035","document":"mgni-20250916.htm","filed":"2025-09-16","form":"8-K","items":"7.01,8.01,9.01","report_date":"2025-09-16"},{"accession":"0001595974-25-000030","document":"mgni-20250831.htm","filed":"2025-09-05","form":"8-K","items":"1.01","report_date":"2025-08-31"},{"accession":"0001595974-25-000028","document":"mgni-20250806.htm","filed":"2025-08-06","form":"8-K","items":"2.02,9.01","report_date":"2025-08-06"},{"accession":"0001595974-25-000027","document":"mgni-20250630.htm","filed":"2025-08-06","form":"10-Q","items":"","report_date":"2025-06-30"},{"accession":"0001595974-25-000020","document":"mgni-20250605.htm","filed":"2025-06-10","form":"8-K","items":"5.07","report_date":"2025-06-05"},{"accession":"0001595974-25-000017","document":"mgni-20250331.htm","filed":"2025-05-07","form":"10-Q","items":"","report_date":"2025-03-31"},{"accession":"0001595974-25-000015","document":"mgni-20250507.htm","filed":"2025-05-07","form":"8-K","items":"2.02,9.01","report_date":"2025-05-07"},{"accession":"0001999371-25-004317","document":"mgni-def14a_060525.htm","filed":"2025-04-16","form":"DEF 14A","items":"","report_date":"2025-06-05"},{"accession":"0001193125-25-056671","document":"d942988d8k.htm","filed":"2025-03-18","form":"8-K","items":"1.01,7.01,9.01","report_date":"2025-03-18"},{"accession":"0001595974-25-000008","document":"mgni-20241231.htm","filed":"2025-02-26","form":"10-K","items":"","report_date":"2024-12-31"},{"accession":"0001595974-25-000006","document":"mgni-20250226.htm","filed":"2025-02-26","form":"8-K","items":"2.02,9.01","report_date":"2025-02-26"},{"accession":"0001595974-24-000045","document":"mgni-20241211.htm","filed":"2024-12-12","form":"8-K","items":"5.02","report_date":"2024-12-11"},{"accession":"0000950103-24-016193","document":"dp218203_sc13ga-2.htm","filed":"2024-11-12","form":"SC 13G/A","items":"","report_date":""},{"accession":"0000315066-24-002794","document":"filing.txt","filed":"2024-11-12","form":"SC 13G/A","items":"","report_date":""},{"accession":"0001595974-24-000041","document":"mgni-20240930.htm","filed":"2024-11-07","form":"10-Q","items":"","report_date":"2024-09-30"},{"accession":"0001595974-24-000039","document":"mgni-20241107.htm","filed":"2024-11-07","form":"8-K","items":"2.02,9.01","report_date":"2024-11-07"},{"accession":"0001193125-24-221440","document":"d895917d8k.htm","filed":"2024-09-18","form":"8-K","items":"1.01,7.01,9.01","report_date":"2024-09-18"},{"accession":"0001595974-24-000032","document":"mgni-20240630.htm","filed":"2024-08-07","form":"10-Q","items":"","report_date":"2024-06-30"},{"accession":"0001595974-24-000031","document":"mgni-20240807.htm","filed":"2024-08-07","form":"8-K","items":"2.02,9.01","report_date":"2024-08-07"},{"accession":"0001595974-24-000025","document":"mgni-20240612.htm","filed":"2024-06-14","form":"8-K","items":"5.07","report_date":"2024-06-12"}],"former_names":[{"from":"2014-01-16T05:00:00.000Z","name":"RUBICON PROJECT, INC.","to":"2020-06-30T04:00:00.000Z"}],"gleif_parents":[],"headquarters":[{"latitude":34.05223,"longitude":-118.24368,"name":"Los Angeles","precision":"headquarters locality","source":"wikidata","url":"https://www.wikidata.org/wiki/Q65"}],"insiders":[{"accession":"0001193125-26-276264","acquired_disposed":"D","code":"S","date":"2026-06-17","derivative":false,"filed":"2026-06-18","following_shares":"373514.0","form":"4","owners":["Buckley Sean Patrick"],"plan_10b5_1":false,"price":"19.0","security":"Common Stock","shares":"19233.0"},{"accession":"0001193125-26-274503","acquired_disposed":"D","code":"S","date":"2026-06-17","derivative":false,"filed":"2026-06-17","following_shares":"279085.0","form":"4","owners":["Buonasera David"],"plan_10b5_1":false,"price":"19.0","security":"Common Stock","shares":"1409.0"},{"accession":"0001193125-26-274508","acquired_disposed":"D","code":"S","date":"2026-06-16","derivative":false,"filed":"2026-06-17","following_shares":"125810.0","form":"4","owners":["Knopper Douglas S"],"plan_10b5_1":false,"price":"18.1","security":"Common Stock","shares":"37337.0"},{"accession":"0001193125-26-274503","acquired_disposed":"D","code":"S","date":"2026-06-16","derivative":false,"filed":"2026-06-17","following_shares":"280494.0","form":"4","owners":["Buonasera David"],"plan_10b5_1":false,"price":"18.0","security":"Common Stock","shares":"11233.0"},{"accession":"0001193125-26-274501","acquired_disposed":"D","code":"S","date":"2026-06-16","derivative":false,"filed":"2026-06-17","following_shares":"403074.0","form":"4","owners":["BARRETT MICHAEL G."],"plan_10b5_1":false,"price":"17.5","security":"Common Stock","shares":"100000.0"},{"accession":"0001193125-26-274501","acquired_disposed":"A","code":"M","date":"2026-06-16","derivative":false,"filed":"2026-06-17","following_shares":"503074.0","form":"4","owners":["BARRETT MICHAEL G."],"plan_10b5_1":false,"price":"5.8","security":"Common Stock","shares":"100000.0"},{"accession":"0001193125-26-274501","acquired_disposed":"D","code":"M","date":"2026-06-16","derivative":true,"filed":"2026-06-17","following_shares":"407564.0","form":"4","owners":["BARRETT MICHAEL G."],"plan_10b5_1":false,"price":"0.0","security":"Employee Stock Option (Right to Buy)","shares":"100000.0"},{"accession":"0001193125-26-274503","acquired_disposed":"D","code":"S","date":"2026-06-15","derivative":false,"filed":"2026-06-17","following_shares":"291727.0","form":"4","owners":["Buonasera David"],"plan_10b5_1":false,"price":"17.0","security":"Common Stock","shares":"1057.0"},{"accession":"0001193125-26-274501","acquired_disposed":"D","code":"S","date":"2026-06-15","derivative":false,"filed":"2026-06-17","following_shares":"403074.0","form":"4","owners":["BARRETT MICHAEL G."],"plan_10b5_1":false,"price":"16.59","security":"Common Stock","shares":"178596.0"},{"accession":"0001193125-26-274501","acquired_disposed":"A","code":"M","date":"2026-06-15","derivative":false,"filed":"2026-06-17","following_shares":"581670.0","form":"4","owners":["BARRETT MICHAEL G."],"plan_10b5_1":false,"price":"5.8","security":"Common Stock","shares":"178596.0"},{"accession":"0001193125-26-274501","acquired_disposed":"D","code":"M","date":"2026-06-15","derivative":true,"filed":"2026-06-17","following_shares":"507564.0","form":"4","owners":["BARRETT MICHAEL G."],"plan_10b5_1":false,"price":"0.0","security":"Employee Stock Option (Right to Buy)","shares":"178596.0"},{"accession":"0001193125-26-266370","acquired_disposed":"D","code":"S","date":"2026-06-10","derivative":false,"filed":"2026-06-10","following_shares":"163147.0","form":"4","owners":["Knopper Douglas S"],"plan_10b5_1":false,"price":"15.73","security":"Common Stock","shares":"10766.0"},{"accession":"0001193125-26-266358","acquired_disposed":"D","code":"S","date":"2026-06-10","derivative":false,"filed":"2026-06-10","following_shares":"79001.0","form":"4","owners":["PEARSON DAVID T."],"plan_10b5_1":false,"price":"15.65","security":"Common Stock","shares":"10766.0"},{"accession":"0001193125-26-266380","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"167401.0","form":"4","owners":["Caine Paul"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001193125-26-266376","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"81279.0","form":"4","owners":["Yu Diane"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001193125-26-266375","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"57715.0","form":"4","owners":["Spillane Robert F"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001193125-26-266371","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"163737.0","form":"4","owners":["Harden Sarah Patricia"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001193125-26-266370","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"173913.0","form":"4","owners":["Knopper Douglas S"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001193125-26-266364","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"107477.0","form":"4","owners":["Rossman James"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001193125-26-266363","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"240620.0","form":"4","owners":["Lam Rachel"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001193125-26-266358","acquired_disposed":"A","code":"A","date":"2026-06-08","derivative":false,"filed":"2026-06-10","following_shares":"89767.0","form":"4","owners":["PEARSON DAVID T."],"plan_10b5_1":false,"price":"0.0","security":"Common Stock","shares":"13798.0"},{"accession":"0001966857-26-000006","acquired_disposed":"D","code":"S","date":"2026-06-01","derivative":false,"filed":"2026-06-03","following_shares":"292784.0","form":"4","owners":["Buonasera David"],"plan_10b5_1":true,"price":"15.0","security":"Common Stock","shares":"1409.0"},{"accession":"0001603808-26-000002","acquired_disposed":"D","code":"S","date":"2026-05-19","derivative":false,"filed":"2026-05-21","following_shares":"43917.0","form":"4","owners":["Spillane Robert F"],"plan_10b5_1":false,"price":"13.33","security":"Common Stock","shares":"10000.0"},{"accession":"0001966857-26-000005","acquired_disposed":"D","code":"F","date":"2026-05-15","derivative":false,"filed":"2026-05-19","following_shares":"294193.0","form":"4","owners":["Buonasera David"],"plan_10b5_1":false,"price":"12.82","security":"Common Stock","shares":"8335.0"},{"accession":"0001865116-26-000004","acquired_disposed":"D","code":"F","date":"2026-05-15","derivative":false,"filed":"2026-05-19","following_shares":"392747.0","form":"4","owners":["Buckley Sean Patrick"],"plan_10b5_1":false,"price":"12.82","security":"Common Stock","shares":"12019.0"},{"accession":"0001807986-26-000004","acquired_disposed":"D","code":"F","date":"2026-05-15","derivative":false,"filed":"2026-05-19","following_shares":"270016.0","form":"4","owners":["Saltz Aaron"],"plan_10b5_1":false,"price":"12.82","security":"Common Stock","shares":"5627.0"},{"accession":"0001778484-26-000003","acquired_disposed":"D","code":"F","date":"2026-05-15","derivative":false,"filed":"2026-05-19","following_shares":"118596.0","form":"4","owners":["Gephart Brian"],"plan_10b5_1":false,"price":"12.82","security":"Common Stock","shares":"3789.0"},{"accession":"0001700262-26-000004","acquired_disposed":"D","code":"F","date":"2026-05-15","derivative":false,"filed":"2026-05-19","following_shares":"496840.0","form":"4","owners":["Evans Katie Seitz"],"plan_10b5_1":false,"price":"12.82","security":"Common Stock","shares":"11204.0"},{"accession":"0001523288-26-000005","acquired_disposed":"D","code":"F","date":"2026-05-15","derivative":false,"filed":"2026-05-19","following_shares":"493289.0","form":"4","owners":["Day David"],"plan_10b5_1":false,"price":"12.82","security":"Common Stock","shares":"14170.0"},{"accession":"0001100612-26-000004","acquired_disposed":"D","code":"F","date":"2026-05-15","derivative":false,"filed":"2026-05-19","following_shares":"403074.0","form":"4","owners":["BARRETT MICHAEL G."],"plan_10b5_1":false,"price":"12.82","security":"Common Stock","shares":"10404.0"}],"legal_name":"MAGNITE, INC.","lei":"54930018FR2YX1HHSB02","lei_status":"ISSUED","lei_updated_at":"2025-11-17T16:01:34Z","names":[],"parent_exceptions":["direct-parent: no parent LEI supplied","ultimate-parent: no parent LEI supplied"],"parents":[],"wikidata_id":"Q4411116"},"research_built_at":"2026-09-08T00:28:31.573928+00:00","sources":[{"coverage":"8005 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer","id":"sec","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC submissions","retrieved_at":"2026-09-08T00:28:36.996621+00:00","status":"ok","url":"https://www.sec.gov/search-filings/edgar-application-programming-interfaces"},{"coverage":"1611 unambiguous CIK-linked entities; coverage is incomplete","id":"wikidata","license":"CC0-1.0","license_url":"https://www.wikidata.org/wiki/Wikidata:Licensing","name":"Wikidata structured data","retrieved_at":"2026-09-07T20:33:33.971872+00:00","status":"ok","url":"https://www.wikidata.org/"},{"coverage":"1177 checked identities; 0 unavailable records","id":"gleif","license":"CC0-1.0","license_url":"https://www.gleif.org/en/meta/lei-data-terms-of-use","name":"GLEIF legal entity reference data","retrieved_at":"2026-09-07T20:35:11.504394+00:00","status":"ok","url":"https://www.gleif.org/en/lei-data/gleif-api"},{"coverage":"4 selected series; gaps remain missing","id":"fed","license":"Public domain (selected government series)","license_url":"https://www.federalreserve.gov/disclaimer.htm","name":"Federal Reserve Board H.15","retrieved_at":"2026-09-08T00:28:58.131796+00:00","status":"ok","url":"https://www.federalreserve.gov/releases/h15/"},{"coverage":"9 selected series; gaps remain missing","id":"bls","license":"Public domain","license_url":"https://www.bls.gov/opub/copyright-information.htm","name":"Bureau of Labor Statistics","retrieved_at":"2026-09-08T00:28:59.313116+00:00","status":"ok","url":"https://www.bls.gov/developers/"},{"coverage":"2026 Q2: filings in this completed quarter; not a live transaction feed","id":"insiders","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC insider transactions","retrieved_at":"2026-09-07T20:35:31.647091+00:00","status":"ok","url":"https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets"}]}