{"transactions":[{"id":683722,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-08-18T20:14:39.000Z","date":"2026-08-18","kind":"sale","planned":true,"acquired":false,"shares":2759,"price":25,"value":68975.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."}],"balance_after":293060,"source":{"system":"sec-edgar","filing":"0001865116-26-000009","document":"wk-form4_1787084076.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000009/wk-form4_1787084076.xml","form_type":"4"}},{"id":683721,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-08-18T20:14:39.000Z","date":"2026-08-17","kind":"sale","planned":true,"acquired":false,"shares":8271,"price":24.31,"value":201068.01,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.05 to $24.55, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":295819,"source":{"system":"sec-edgar","filing":"0001865116-26-000009","document":"wk-form4_1787084076.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000009/wk-form4_1787084076.xml","form_type":"4"}},{"id":683720,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-08-18T20:14:39.000Z","date":"2026-08-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":11715,"price":24.73,"value":289711.95,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":304090,"source":{"system":"sec-edgar","filing":"0001865116-26-000009","document":"wk-form4_1787084076.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000009/wk-form4_1787084076.xml","form_type":"4"}},{"id":693157,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (right to buy)","published_at":"2026-08-07T21:14:08.000Z","date":"2026-08-06","kind":"exercise","planned":true,"acquired":false,"shares":28703,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Granted as compensation for services."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The stock options have fully vested and are immediately exercisable."}],"balance_after":57405,"derivative":{"exercise_price":13.9,"expiration_date":"2032-02-01","underlying":"Common Stock","underlying_shares":28703},"source":{"system":"sec-edgar","filing":"0001865116-26-000007","document":"wk-form4_1786137246.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000007/wk-form4_1786137246.xml","form_type":"4"}},{"id":693156,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-08-07T21:14:08.000Z","date":"2026-08-06","kind":"sale","planned":true,"acquired":false,"shares":19237,"price":23,"value":442451.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."}],"balance_after":315805,"source":{"system":"sec-edgar","filing":"0001865116-26-000007","document":"wk-form4_1786137246.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000007/wk-form4_1786137246.xml","form_type":"4"}},{"id":693155,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-08-07T21:14:08.000Z","date":"2026-08-06","kind":"sale","planned":true,"acquired":false,"shares":47942,"price":25.09,"value":1202864.78,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."}],"balance_after":335042,"source":{"system":"sec-edgar","filing":"0001865116-26-000007","document":"wk-form4_1786137246.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000007/wk-form4_1786137246.xml","form_type":"4"}},{"id":693154,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-08-07T21:14:08.000Z","date":"2026-08-06","kind":"exercise","planned":true,"acquired":true,"shares":28703,"price":13.9,"value":398971.7,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."}],"balance_after":382984,"source":{"system":"sec-edgar","filing":"0001865116-26-000007","document":"wk-form4_1786137246.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000007/wk-form4_1786137246.xml","form_type":"4"}},{"id":711875,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-07-09T20:27:32.000Z","date":"2026-07-07","kind":"sale","planned":true,"acquired":false,"shares":19233,"price":21.03,"value":404469.99,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.00 to $21.16, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":354281,"source":{"system":"sec-edgar","filing":"0001193125-26-299731","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000119312526299731/ownership.xml","form_type":"4"}},{"id":732254,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2026-06-18T23:51:24.000Z","date":"2026-06-17","kind":"sale","planned":true,"acquired":false,"shares":19233,"price":19,"value":365427.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025."}],"balance_after":373514,"source":{"system":"sec-edgar","filing":"0001193125-26-276264","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000119312526276264/ownership.xml","form_type":"4"}},{"id":772339,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2026-05-19T21:00:19.000Z","date":"2026-05-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":12019,"price":12.82,"value":154083.58,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,767 shares acquired by the Reporting Person on May 15, 2026 under the Issuer's Employee Stock Purchase Plan."}],"balance_after":392747,"source":{"system":"sec-edgar","filing":"0001865116-26-000004","document":"form4-05192026_050507.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000004/form4-05192026_050507.xml","form_type":"4"}},{"id":897172,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2026-02-18T21:30:17.000Z","date":"2026-02-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":26942,"price":11.7,"value":315221.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":402999,"source":{"system":"sec-edgar","filing":"0001865116-26-000003","document":"form4-02182026_040210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000003/form4-02182026_040210.xml","form_type":"4"}},{"id":941126,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Performance Stock Units","published_at":"2026-01-12T21:30:15.000Z","date":"2026-01-09","kind":"exercise","planned":false,"acquired":false,"shares":64125,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each PSU represents a contingent right to receive, on vesting, one share of the Issuer's common stock, subject to Issuer performance as more specifically described in Footnote 4 herein."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Vesting of the PSU was determined based on the Issuer's total stockholder return (\"TSR\") for the three-year period beginning on January 1, 2023 relative to the TSRs of the companies in the Russell 2000 index over that period. The number of PSUs reported in column 5 on the Form 4 filed with the Securities and Exchange Commission on January 4, 2023 reflected the target number of PSUs initially subject to the award. The award was eligible to vest as to 0% to 150% of the target number of PSUs. On January 9, 2026, the Compensation Committee of the Issuer's Board of Directors determined that, based on 126.35% achievement, the Reporting Person actually vested 64,125 shares."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Vesting of the PSU was determined based on the Issuer's total stockholder return (\"TSR\") for the three-year period beginning on January 1, 2023 relative to the TSRs of the companies in the Russell 2000 index over that period. The number of PSUs reported in column 5 on the Form 4 filed with the Securities and Exchange Commission on January 4, 2023 reflected the target number of PSUs initially subject to the award. The award was eligible to vest as to 0% to 150% of the target number of PSUs. On January 9, 2026, the Compensation Committee of the Issuer's Board of Directors determined that, based on 126.35% achievement, the Reporting Person actually vested 64,125 shares."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":64125},"source":{"system":"sec-edgar","filing":"0001865116-26-000002","document":"form4-01122026_040104.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000002/form4-01122026_040104.xml","form_type":"4"}},{"id":941125,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2026-01-12T21:30:15.000Z","date":"2026-01-09","kind":"tax_withholding","planned":false,"acquired":false,"shares":30369,"price":16.17,"value":491066.73,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of the performance stock units (\"PSUs\") being reported herein."}],"balance_after":429941,"source":{"system":"sec-edgar","filing":"0001865116-26-000002","document":"form4-01122026_040104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000002/form4-01122026_040104.xml","form_type":"4"}},{"id":941124,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2026-01-12T21:30:15.000Z","date":"2026-01-09","kind":"exercise","planned":false,"acquired":true,"shares":64125,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."}],"balance_after":460310,"source":{"system":"sec-edgar","filing":"0001865116-26-000002","document":"form4-01122026_040104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000002/form4-01122026_040104.xml","form_type":"4"}},{"id":951887,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Performance Stock Units","published_at":"2026-01-06T00:13:29.000Z","date":"2026-01-01","kind":"grant","planned":false,"acquired":true,"shares":42757,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive on vesting one share of the Issuer's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The PSUs will generally vest on the three-year anniversary of the grant date of the award subject to the Reporting Person's continued service through such date. The number of shares vested will be determined based on the Issuer's total stockholder return (\"TSR\") relative to the TSRs of the companies in the Russell 2000 index for the three year-period beginning January 1, 2026, as well as certain interim measurements based on relative TSR for the one-year and two-year periods beginning on January 1, 2026. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The PSUs will generally vest on the three-year anniversary of the grant date of the award subject to the Reporting Person's continued service through such date. The number of shares vested will be determined based on the Issuer's total stockholder return (\"TSR\") relative to the TSRs of the companies in the Russell 2000 index for the three year-period beginning January 1, 2026, as well as certain interim measurements based on relative TSR for the one-year and two-year periods beginning on January 1, 2026. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."}],"balance_after":42757,"derivative":{"underlying":"Common Stock","underlying_shares":42757},"source":{"system":"sec-edgar","filing":"0001865116-26-000001","document":"form4-01062026_120125.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000001/form4-01062026_120125.xml","form_type":"4"}},{"id":951886,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2026-01-06T00:13:29.000Z","date":"2026-01-01","kind":"grant","planned":false,"acquired":true,"shares":127273,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 34,470 on February 15, 2027, 7,955 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2029 and 5,298 on February 15, 2030, subject to continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."}],"balance_after":396185,"source":{"system":"sec-edgar","filing":"0001865116-26-000001","document":"form4-01062026_120125.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511626000001/form4-01062026_120125.xml","form_type":"4"}},{"id":987297,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-11-26T21:10:18.000Z","date":"2025-11-24","kind":"sale","planned":true,"acquired":false,"shares":2213,"price":14.5,"value":32088.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":268912,"source":{"system":"sec-edgar","filing":"0001865116-25-000004","document":"form4-11262025_041110.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511625000004/form4-11262025_041110.xml","form_type":"4"}},{"id":995977,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-11-19T00:41:08.000Z","date":"2025-11-18","kind":"sale","planned":true,"acquired":false,"shares":4426,"price":13.36,"value":59131.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.14 to $13.50, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":271125,"source":{"system":"sec-edgar","filing":"0001865116-25-000003","document":"form4-11192025_121103.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511625000003/form4-11192025_121103.xml","form_type":"4"}},{"id":995976,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-11-19T00:41:08.000Z","date":"2025-11-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":11642,"price":14.15,"value":164734.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":275551,"source":{"system":"sec-edgar","filing":"0001865116-25-000003","document":"form4-11192025_121103.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000186511625000003/form4-11192025_121103.xml","form_type":"4"}},{"id":1044091,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-09-10T21:00:08.000Z","date":"2025-09-09","kind":"sale","planned":false,"acquired":false,"shares":20000,"price":24.61,"value":492200.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.51 to $25.07, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":287193,"source":{"system":"sec-edgar","filing":"0001415889-25-024106","document":"form4-09102025_050904.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925024106/form4-09102025_050904.xml","form_type":"4"}},{"id":1044090,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-09-10T21:00:08.000Z","date":"2025-09-08","kind":"sale","planned":false,"acquired":false,"shares":20000,"price":25.56,"value":511200.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.50 to $25.69, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":307193,"source":{"system":"sec-edgar","filing":"0001415889-25-024106","document":"form4-09102025_050904.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925024106/form4-09102025_050904.xml","form_type":"4"}},{"id":1060389,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-08-20T20:30:21.000Z","date":"2025-08-19","kind":"sale","planned":true,"acquired":false,"shares":9315,"price":23.42,"value":218157.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.18 to $24.10, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":327193,"source":{"system":"sec-edgar","filing":"0001415889-25-022453","document":"form4-08202025_040816.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925022453/form4-08202025_040816.xml","form_type":"4"}},{"id":1060388,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-08-20T20:30:21.000Z","date":"2025-08-18","kind":"sale","planned":true,"acquired":false,"shares":10886,"price":23.85,"value":259631.1,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These shares were sold to cover the Reporting Person's tax obligation resulting from the settlement of vested Restricted Stock Units. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by sell to cover transactions and does not represent a discretionary transaction by the Reporting Person."}],"balance_after":336508,"source":{"system":"sec-edgar","filing":"0001415889-25-022453","document":"form4-08202025_040816.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925022453/form4-08202025_040816.xml","form_type":"4"}},{"id":1145627,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-05-16T21:40:09.000Z","date":"2025-05-16","kind":"sale","planned":true,"acquired":false,"shares":9692,"price":15.73,"value":152455.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.61 to $15.86, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":347394,"source":{"system":"sec-edgar","filing":"0001415889-25-013470","document":"form4-05162025_050505.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925013470/form4-05162025_050505.xml","form_type":"4"}},{"id":1145626,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-05-16T21:40:09.000Z","date":"2025-05-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":15049,"price":15.88,"value":238978.12,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,577 shares acquired by the Reporting Person on May 15, 2025 under the Issuer's Employee Stock Purchase Plan."}],"balance_after":357086,"source":{"system":"sec-edgar","filing":"0001415889-25-013470","document":"form4-05162025_050505.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925013470/form4-05162025_050505.xml","form_type":"4"}},{"id":1253190,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-02-21T21:57:57.000Z","date":"2025-02-19","kind":"sale","planned":true,"acquired":false,"shares":10527,"price":19.13,"value":201381.51,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.02 to $19.31, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4."}],"balance_after":370558,"source":{"system":"sec-edgar","filing":"0001415889-25-005099","document":"form4-02212025_090252.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925005099/form4-02212025_090252.xml","form_type":"4"}},{"id":1260367,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-02-19T21:29:44.000Z","date":"2025-02-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":27444,"price":20,"value":548880.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":381085,"source":{"system":"sec-edgar","filing":"0001415889-25-004629","document":"form4-02192025_090240.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925004629/form4-02192025_090240.xml","form_type":"4"}},{"id":1278877,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-02-07T23:46:55.000Z","date":"2025-02-07","kind":"sale","planned":true,"acquired":false,"shares":18693,"price":20,"value":373860.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":408529,"source":{"system":"sec-edgar","filing":"0001415889-25-003399","document":"form4-02072025_110251.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925003399/form4-02072025_110251.xml","form_type":"4"}},{"id":1304385,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Performance Stock Units","published_at":"2025-01-13T22:35:36.000Z","date":"2025-01-09","kind":"grant","planned":false,"acquired":true,"shares":41566,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive on vesting one share of the Issuer's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The PSUs will generally vest on the three-year anniversary of the grant date of the award subject to the Reporting Person's continued service through such date. The number of shares vested will be determined based on the Issuer's total stockholder return (\"TSR\") relative to the TSRs of the companies in the Russell 2000 index for the three year-period beginning January 1, 2025, as well as certain interim measurements based on relative TSR for the one-year and two-year periods beginning on January 1, 2025. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The PSUs will generally vest on the three-year anniversary of the grant date of the award subject to the Reporting Person's continued service through such date. The number of shares vested will be determined based on the Issuer's total stockholder return (\"TSR\") relative to the TSRs of the companies in the Russell 2000 index for the three year-period beginning January 1, 2025, as well as certain interim measurements based on relative TSR for the one-year and two-year periods beginning on January 1, 2025. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."}],"balance_after":41566,"derivative":{"underlying":"Common Stock","underlying_shares":41566},"source":{"system":"sec-edgar","filing":"0001415889-25-001392","document":"form4-01132025_100132.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925001392/form4-01132025_100132.xml","form_type":"4"}},{"id":1304384,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, Revenue"}}],"security":"Common Stock","published_at":"2025-01-13T22:35:36.000Z","date":"2025-01-09","kind":"grant","planned":false,"acquired":true,"shares":123479,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 33,442 on February 15, 2026, 7,717 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2028 and 5,150 on February 15, 2029, subject to continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."}],"balance_after":427222,"source":{"system":"sec-edgar","filing":"0001415889-25-001392","document":"form4-01132025_100132.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588925001392/form4-01132025_100132.xml","form_type":"4"}},{"id":1359511,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-11-20T01:04:02.000Z","date":"2024-11-18","kind":"sale","planned":true,"acquired":false,"shares":10001,"price":15.6,"value":156015.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.44 to $15.77 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":303743,"source":{"system":"sec-edgar","filing":"0001415889-24-027282","document":"form4-11202024_011158.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924027282/form4-11202024_011158.xml","form_type":"4"}},{"id":1359510,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-11-20T01:04:02.000Z","date":"2024-11-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":10133,"price":15.85,"value":160608.05,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":313744,"source":{"system":"sec-edgar","filing":"0001415889-24-027282","document":"form4-11202024_011158.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924027282/form4-11202024_011158.xml","form_type":"4"}},{"id":1366797,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-11-13T21:15:16.000Z","date":"2024-11-11","kind":"sale","planned":true,"acquired":false,"shares":2619,"price":15.5,"value":40594.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":323877,"source":{"system":"sec-edgar","filing":"0001415889-24-026693","document":"form4-11132024_041110.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924026693/form4-11132024_041110.xml","form_type":"4"}},{"id":1366796,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-11-13T21:15:16.000Z","date":"2024-11-11","kind":"sale","planned":true,"acquired":false,"shares":2623,"price":14.5,"value":38033.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":326496,"source":{"system":"sec-edgar","filing":"0001415889-24-026693","document":"form4-11132024_041110.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924026693/form4-11132024_041110.xml","form_type":"4"}},{"id":1426634,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-08-21T21:30:13.000Z","date":"2024-08-20","kind":"sale","planned":true,"acquired":false,"shares":2623,"price":13.5,"value":35410.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":329119,"source":{"system":"sec-edgar","filing":"0001415889-24-021836","document":"form4-08212024_090809.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924021836/form4-08212024_090809.xml","form_type":"4"}},{"id":1426633,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-08-21T21:30:13.000Z","date":"2024-08-19","kind":"sale","planned":true,"acquired":false,"shares":2623,"price":12.53,"value":32866.19,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":331742,"source":{"system":"sec-edgar","filing":"0001415889-24-021836","document":"form4-08212024_090809.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924021836/form4-08212024_090809.xml","form_type":"4"}},{"id":1431492,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-08-16T21:15:02.000Z","date":"2024-08-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":9646,"price":12.51,"value":120671.46,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":334365,"source":{"system":"sec-edgar","filing":"0001415889-24-021488","document":"form4-08162024_090859.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924021488/form4-08162024_090859.xml","form_type":"4"}},{"id":1452707,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-07-17T20:23:33.000Z","date":"2024-07-16","kind":"sale","planned":true,"acquired":false,"shares":19604,"price":15.5,"value":303862.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":344011,"source":{"system":"sec-edgar","filing":"0001415889-24-019671","document":"form4-07172024_080729.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924019671/form4-07172024_080729.xml","form_type":"4"}},{"id":1452706,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-07-17T20:23:33.000Z","date":"2024-07-15","kind":"sale","planned":true,"acquired":false,"shares":19607,"price":14.5,"value":284301.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":363615,"source":{"system":"sec-edgar","filing":"0001415889-24-019671","document":"form4-07172024_080729.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924019671/form4-07172024_080729.xml","form_type":"4"}},{"id":1487107,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-06-07T20:17:15.000Z","date":"2024-06-05","kind":"sale","planned":true,"acquired":false,"shares":21653,"price":13.5,"value":292315.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":383222,"source":{"system":"sec-edgar","filing":"0001415889-24-015963","document":"form4-06072024_080611.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924015963/form4-06072024_080611.xml","form_type":"4"}},{"id":1499312,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-05-29T20:33:44.000Z","date":"2024-05-24","kind":"sale","planned":true,"acquired":false,"shares":2682,"price":12.5,"value":33525.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."}],"balance_after":404875,"source":{"system":"sec-edgar","filing":"0001415889-24-014763","document":"form4-05292024_080538.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924014763/form4-05292024_080538.xml","form_type":"4"}},{"id":1511748,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-05-17T21:00:56.000Z","date":"2024-05-16","kind":"sale","planned":true,"acquired":false,"shares":16925,"price":12.5,"value":211562.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 3,272 shares acquired by the Reporting Person on May 15, 2024 under the Issuer's Employee Stock Purchase Plan."}],"balance_after":407557,"source":{"system":"sec-edgar","filing":"0001415889-24-013566","document":"form4-05172024_050540.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924013566/form4-05172024_050540.xml","form_type":"4"}},{"id":1511747,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-05-17T21:00:56.000Z","date":"2024-05-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":9407,"price":9.8,"value":92188.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":421210,"source":{"system":"sec-edgar","filing":"0001415889-24-013566","document":"form4-05172024_050540.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924013566/form4-05172024_050540.xml","form_type":"4"}},{"id":1638549,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"Common Stock","published_at":"2024-02-16T21:28:41.000Z","date":"2024-02-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":24110,"price":9.74,"value":234831.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":430617,"source":{"system":"sec-edgar","filing":"0001415889-24-004138","document":"form4-02162024_090231.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000141588924004138/form4-02162024_090231.xml","form_type":"4"}},{"id":1688288,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Performance Stock Units","published_at":"2024-01-04T22:04:32.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":50752,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive on vesting one share of the Issuer's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The PSUs will generally vest on the three-year anniversary of the grant date of the award subject to the Reporting Person's continued service through such date.  The number of shares vested will be determined based on the Issuer's total stockholder return (\"TSR\") relative to the TSRs of the companies in the Russell 2000 index for the three year-period beginning January 1, 2024, as well as certain interim measurements based on relative TSR for the one-year and two-year periods beginning on January 1, 2024. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The PSUs will generally vest on the three-year anniversary of the grant date of the award subject to the Reporting Person's continued service through such date.  The number of shares vested will be determined based on the Issuer's total stockholder return (\"TSR\") relative to the TSRs of the companies in the Russell 2000 index for the three year-period beginning January 1, 2024, as well as certain interim measurements based on relative TSR for the one-year and two-year periods beginning on January 1, 2024. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."}],"balance_after":50752,"derivative":{"underlying":"Common Stock","underlying_shares":50752},"source":{"system":"sec-edgar","filing":"0001209191-24-000843","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919124000843/doc4.xml","form_type":"4"}},{"id":1688287,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2024-01-04T22:04:32.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":142276,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 38,533 on February 15, 2025, 8,892 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2027 and 5,931 on February 15, 2028, subject to continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan."}],"balance_after":454727,"source":{"system":"sec-edgar","filing":"0001209191-24-000843","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919124000843/doc4.xml","form_type":"4"}},{"id":1737031,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2023-11-17T21:18:57.000Z","date":"2023-11-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":5078,"price":7.89,"value":40065.42,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":312451,"source":{"system":"sec-edgar","filing":"0001209191-23-055747","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919123055747/doc4.xml","form_type":"4"}},{"id":1802050,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2023-08-18T20:34:20.000Z","date":"2023-08-16","kind":"sale","planned":false,"acquired":false,"shares":5273,"price":8.31,"value":43818.63,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary sale of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":317529,"source":{"system":"sec-edgar","filing":"0001209191-23-046561","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919123046561/doc4.xml","form_type":"4"}},{"id":1865343,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2023-06-06T21:34:40.000Z","date":"2023-06-02","kind":"sale","planned":false,"acquired":false,"shares":12219,"price":12.99,"value":158724.81,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary sale of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":322802,"source":{"system":"sec-edgar","filing":"0001209191-23-034826","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919123034826/doc4.xml","form_type":"4"}},{"id":1887047,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2023-05-18T23:57:18.000Z","date":"2023-05-16","kind":"sale","planned":false,"acquired":false,"shares":5640,"price":10.88,"value":61363.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary sale of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 4,456 shares acquired by the Reporting Person on May 15, 2023 under the Issuer's employee stock purchase plan."}],"balance_after":335021,"source":{"system":"sec-edgar","filing":"0001209191-23-030822","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919123030822/doc4.xml","form_type":"4"}},{"id":2008000,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2023-02-17T21:37:01.000Z","date":"2023-02-15","kind":"tax_withholding","acquired":false,"shares":15401,"price":13.27,"value":204371.27,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":336205,"source":{"system":"sec-edgar","filing":"0001209191-23-010667","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919123010667/doc4.xml","form_type":"4"}},{"id":2068503,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Performance Stock Units","published_at":"2023-01-05T00:23:59.000Z","date":"2023-01-01","kind":"grant","acquired":true,"shares":50752,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive on vesting one share of the Issuer's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Vesting of the PSU will be determined based on the Issuer's total stockholder return (\"TSR\") for the three-year period beginning on the grant date of the award relative to the TSRs of the companies in the Russell 2000 index over that period. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Vesting of the PSU will be determined based on the Issuer's total stockholder return (\"TSR\") for the three-year period beginning on the grant date of the award relative to the TSRs of the companies in the Russell 2000 index over that period. The number of PSUs reported in column 5 reflects the target number of PSUs subject to the award. The award is eligible to vest as to 0% to 150% of the target number of PSUs."}],"balance_after":50752,"derivative":{"underlying":"Common Stock","underlying_shares":50752},"source":{"system":"sec-edgar","filing":"0001209191-23-001410","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919123001410/doc4.xml","form_type":"4"}},{"id":2068502,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2023-01-05T00:23:59.000Z","date":"2023-01-01","kind":"grant","acquired":true,"shares":142276,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 38,533 on February 15, 2024, 8,892 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2026 and 5,931 on February 15, 2027, subject to continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's 2014 Equity Incentive Plan."}],"balance_after":351606,"source":{"system":"sec-edgar","filing":"0001209191-23-001410","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919123001410/doc4.xml","form_type":"4"}},{"id":2112478,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2022-11-18T02:05:00.000Z","date":"2022-11-15","kind":"tax_withholding","acquired":false,"shares":1632,"price":11.47,"value":18719.04,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":209330,"source":{"system":"sec-edgar","filing":"0001209191-22-057753","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919122057753/doc4.xml","form_type":"4"}},{"id":2182119,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2022-08-17T20:23:43.000Z","date":"2022-08-15","kind":"tax_withholding","acquired":false,"shares":1632,"price":9.8,"value":15993.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":210962,"source":{"system":"sec-edgar","filing":"0001209191-22-046259","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919122046259/doc4.xml","form_type":"4"}},{"id":2245187,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2022-06-03T20:17:20.000Z","date":"2022-06-01","kind":"tax_withholding","acquired":false,"shares":11185,"price":10.7,"value":119679.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":212594,"source":{"system":"sec-edgar","filing":"0001209191-22-034035","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919122034035/doc4.xml","form_type":"4"}},{"id":2268425,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"Common Stock","published_at":"2022-05-17T21:42:27.000Z","date":"2022-05-15","kind":"tax_withholding","acquired":false,"shares":6525,"price":10.59,"value":69099.75,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units."}],"balance_after":223779,"source":{"system":"sec-edgar","filing":"0001209191-22-029787","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919122029787/doc4.xml","form_type":"4"}},{"id":2414369,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer, CTV"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-02-04T00:23:33.000Z","date":"2022-02-01","kind":"grant","acquired":true,"shares":86108,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Issuer's 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"25% of the total number of shares underlying the option will vest on February 1, 2023 and the remaining shares vest 1/36 per month over the next 36 months thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."}],"balance_after":86108,"derivative":{"exercise_price":13.9,"expiration_date":"2032-02-01","underlying":"Common Stock","underlying_shares":86108},"source":{"system":"sec-edgar","filing":"0001209191-22-007015","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919122007015/doc4.xml","form_type":"4"}},{"id":2414368,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer, CTV"}}],"security":"Common Stock","published_at":"2022-02-04T00:23:33.000Z","date":"2022-02-01","kind":"grant","acquired":true,"shares":121024,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (the \"RSUs\") that vest as follows: 25% of the total number of shares underlying the RSU will vest on February 15, 2023 and the remaining shares vest in 12 equal quarterly installments on the 15th of every May, August, November and February thereafter, subject to continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Issuer's 2014 Equity Incentive Plan."}],"balance_after":230304,"source":{"system":"sec-edgar","filing":"0001209191-22-007015","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919122007015/doc4.xml","form_type":"4"}},{"id":2683718,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer, CTV"}}],"security":"Stock Option (Right to Buy)","published_at":"2021-06-03T21:31:56.000Z","date":"2021-06-01","kind":"grant","acquired":true,"shares":43788,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Issuer's 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"25% of the total number of shares underlying the option will vest on May 15, 2022 and the remaining shares vest 1/36 per month over the next 36 months thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."}],"balance_after":43788,"derivative":{"exercise_price":30.93,"expiration_date":"2031-06-01","underlying":"Common Stock","underlying_shares":43788},"source":{"system":"sec-edgar","filing":"0001209191-21-037794","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919121037794/doc4.xml","form_type":"4"}},{"id":2683717,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer, CTV"}}],"security":"Common Stock","published_at":"2021-06-03T21:31:56.000Z","date":"2021-06-01","kind":"grant","acquired":true,"shares":50437,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents restricted stock units that vest as follows: one-half on June 1, 2022 and one-half on June 1, 2023, subject to the Reporting Person's continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Issuer's 2014 Equity Incentive Plan."}],"balance_after":109280,"source":{"system":"sec-edgar","filing":"0001209191-21-037794","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919121037794/doc4.xml","form_type":"4"}},{"id":2683716,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22298,"kind":"person","name":"Buckley Sean Patrick","position":1,"cik":"0001865116","reported_name":"Buckley Sean Patrick","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer, CTV"}}],"security":"Common Stock","published_at":"2021-06-03T21:31:56.000Z","date":"2021-06-01","kind":"grant","acquired":true,"shares":58843,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 14,711 on May 15, 2022,  3,678 on each August 15, November 15, February 15 and May 15 thereafter until February 15, 2025 and 3,674 on May 15, 2025, subject to the Reporting Person's continued service to the Issuer through each vesting date. This equity grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Issuer's 2014 Equity Incentive Plan."}],"balance_after":58843,"source":{"system":"sec-edgar","filing":"0001209191-21-037794","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1865116/000120919121037794/doc4.xml","form_type":"4"}}]}