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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 213,750 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. 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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. 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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":356708,"source":{"system":"sec-edgar","filing":"0001415889-25-018289","document":"form4-06262025_090633.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925018289/form4-06262025_090633.xml","form_type":"4"}},{"id":1106753,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-06-18T20:22:34.000Z","date":"2025-06-18","kind":"sale","planned":true,"acquired":false,"shares":30000,"price":19,"value":570000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2025."}],"balance_after":656708,"source":{"system":"sec-edgar","filing":"0001415889-25-017673","document":"form4-06182025_080631.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925017673/form4-06182025_080631.xml","form_type":"4"}},{"id":1106752,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-06-18T20:22:34.000Z","date":"2025-06-16","kind":"sale","planned":true,"acquired":false,"shares":45000,"price":17.76,"value":799200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 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 $17.30 to $18.00, 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":686708,"source":{"system":"sec-edgar","filing":"0001415889-25-017673","document":"form4-06182025_080631.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925017673/form4-06182025_080631.xml","form_type":"4"}},{"id":1145917,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-05-16T21:40:06.000Z","date":"2025-05-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":13086,"price":15.88,"value":207805.68,"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":731708,"source":{"system":"sec-edgar","filing":"0001415889-25-013469","document":"form4-05162025_050503.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925013469/form4-05162025_050503.xml","form_type":"4"}},{"id":1261109,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-02-19T21:23:51.000Z","date":"2025-02-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":26499,"price":20,"value":529980.0,"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":743217,"source":{"system":"sec-edgar","filing":"0001415889-25-004614","document":"form4-02192025_090244.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925004614/form4-02192025_090244.xml","form_type":"4"}},{"id":1279091,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Performance Stock Units","published_at":"2025-02-07T23:42:42.000Z","date":"2025-02-05","kind":"exercise","planned":false,"acquired":false,"shares":86806,"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 February 1, 2022 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 February 3, 2022 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 February 5, 2025, the Compensation Committee of the Issuer's Board of Directors determined that, based on 124.83% achievement, the Reporting Person actually vested 108,360 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 February 1, 2022 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 February 3, 2022 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 February 5, 2025, the Compensation Committee of the Issuer's Board of Directors determined that, based on 124.83% achievement, the Reporting Person actually vested 108,360 shares."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":86806},"source":{"system":"sec-edgar","filing":"0001415889-25-003395","document":"form4-02072025_110238.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925003395/form4-02072025_110238.xml","form_type":"4"}},{"id":1279090,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-02-07T23:42:42.000Z","date":"2025-02-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":55675,"price":17.97,"value":1000479.75,"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":769716,"source":{"system":"sec-edgar","filing":"0001415889-25-003395","document":"form4-02072025_110238.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925003395/form4-02072025_110238.xml","form_type":"4"}},{"id":1279089,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-02-07T23:42:42.000Z","date":"2025-02-05","kind":"exercise","planned":false,"acquired":true,"shares":108360,"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":825391,"source":{"system":"sec-edgar","filing":"0001415889-25-003395","document":"form4-02072025_110238.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925003395/form4-02072025_110238.xml","form_type":"4"}},{"id":1304494,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-13T22:44:02.000Z","date":"2025-01-09","kind":"grant","planned":false,"acquired":true,"shares":81374,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"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":"F5","text":"25% of the total number of shares underlying this option will vest on January 1, 2026 and the remaining shares vest 1/36 per month over the next 36 months 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."}],"balance_after":81374,"derivative":{"exercise_price":16.46,"expiration_date":"2035-01-09","underlying":"Common Stock","underlying_shares":81374},"source":{"system":"sec-edgar","filing":"0001415889-25-001407","document":"form4-01132025_100158.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925001407/form4-01132025_100158.xml","form_type":"4"}},{"id":1304493,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Performance Stock Units","published_at":"2025-01-13T22:44:02.000Z","date":"2025-01-09","kind":"grant","planned":false,"acquired":true,"shares":107497,"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":107497,"derivative":{"underlying":"Common Stock","underlying_shares":107497},"source":{"system":"sec-edgar","filing":"0001415889-25-001407","document":"form4-01132025_100158.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925001407/form4-01132025_100158.xml","form_type":"4"}},{"id":1304492,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-01-13T22:44:02.000Z","date":"2025-01-09","kind":"grant","planned":false,"acquired":true,"shares":82117,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 22,240 on February 15, 2026, 5,132 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2028 and 3,425 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":717031,"source":{"system":"sec-edgar","filing":"0001415889-25-001407","document":"form4-01132025_100158.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588925001407/form4-01132025_100158.xml","form_type":"4"}},{"id":1340774,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-12-06T22:00:07.000Z","date":"2024-12-04","kind":"sale","planned":true,"acquired":false,"shares":147996,"price":17.52,"value":2592889.92,"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 March 2, 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 $17.50 to $17.56, 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":634914,"source":{"system":"sec-edgar","filing":"0001415889-24-028483","document":"form4-12062024_051201.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924028483/form4-12062024_051201.xml","form_type":"4"}},{"id":1349841,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-11-27T21:30:19.000Z","date":"2024-11-25","kind":"sale","planned":true,"acquired":false,"shares":27004,"price":17.63,"value":476080.52,"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 March 2, 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 $17.51 to $17.97, 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":782910,"source":{"system":"sec-edgar","filing":"0001415889-24-027857","document":"form4-11272024_041104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924027857/form4-11272024_041104.xml","form_type":"4"}},{"id":1359896,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-11-20T01:02:25.000Z","date":"2024-11-15","kind":"sale","planned":true,"acquired":false,"shares":100000,"price":16.14,"value":1614000.0,"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 March 2, 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 $15.79 to $16.58 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":809914,"source":{"system":"sec-edgar","filing":"0001415889-24-027280","document":"form4-11202024_011121.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924027280/form4-11202024_011121.xml","form_type":"4"}},{"id":1359895,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-11-20T01:02:25.000Z","date":"2024-11-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":9638,"price":15.85,"value":152762.3,"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":909914,"source":{"system":"sec-edgar","filing":"0001415889-24-027280","document":"form4-11202024_011121.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924027280/form4-11202024_011121.xml","form_type":"4"}},{"id":1367052,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-11-13T21:15:17.000Z","date":"2024-11-11","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":15,"value":375000.0,"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 March 2, 2023."}],"balance_after":919552,"source":{"system":"sec-edgar","filing":"0001415889-24-026695","document":"form4-11132024_041114.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924026695/form4-11132024_041114.xml","form_type":"4"}},{"id":1431676,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-08-16T21:12:05.000Z","date":"2024-08-15","kind":"sale","planned":true,"acquired":false,"shares":75000,"price":12.63,"value":947250.0,"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 March 2, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $12.425 to $12.82 per share. 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":944552,"source":{"system":"sec-edgar","filing":"0001415889-24-021484","document":"form4-08162024_090802.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924021484/form4-08162024_090802.xml","form_type":"4"}},{"id":1431675,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-08-16T21:12:05.000Z","date":"2024-08-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":32941,"price":12.51,"value":412091.91,"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":1019552,"source":{"system":"sec-edgar","filing":"0001415889-24-021484","document":"form4-08162024_090802.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924021484/form4-08162024_090802.xml","form_type":"4"}},{"id":1452926,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-07-17T20:21:52.000Z","date":"2024-07-15","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":15,"value":1500000.0,"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 March 2, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $15.00 to $15.025 per share. 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":1052493,"source":{"system":"sec-edgar","filing":"0001415889-24-019670","document":"form4-07172024_080748.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924019670/form4-07172024_080748.xml","form_type":"4"}},{"id":1512155,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-05-17T21:01:00.000Z","date":"2024-05-15","kind":"sale","planned":false,"acquired":false,"shares":75000,"price":9.02,"value":676500.0,"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 March 2, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $8.925 to $9.34 per share. 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 3,272 shares acquired by the Reporting Person on May 15, 2024 under the Issuer's Employee Stock Purchase Plan."}],"balance_after":1152493,"source":{"system":"sec-edgar","filing":"0001415889-24-013565","document":"form4-05172024_050530.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924013565/form4-05172024_050530.xml","form_type":"4"}},{"id":1512154,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-05-17T21:01:00.000Z","date":"2024-05-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":10441,"price":9.8,"value":102321.8,"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":1224221,"source":{"system":"sec-edgar","filing":"0001415889-24-013565","document":"form4-05172024_050530.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924013565/form4-05172024_050530.xml","form_type":"4"}},{"id":1572933,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-03-18T22:31:22.000Z","date":"2024-03-15","kind":"sale","planned":false,"acquired":false,"shares":75000,"price":11.21,"value":840750.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person on March 2, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $11.055 to $11.345, 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 270 shares acquired by the Reporting Person on November 15, 2023  under the Issuer's employee stock purchase plan."}],"balance_after":1234662,"source":{"system":"sec-edgar","filing":"0001415889-24-008332","document":"form4-03182024_100310.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924008332/form4-03182024_100310.xml","form_type":"4"}},{"id":1638897,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-02-16T21:22:18.000Z","date":"2024-02-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":20400,"price":9.74,"value":198696.0,"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":1309392,"source":{"system":"sec-edgar","filing":"0001415889-24-004127","document":"form4-02162024_090210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000141588924004127/form4-02162024_090210.xml","form_type":"4"}},{"id":1688634,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2024-01-04T21:58:43.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":129870,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"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":"F5","text":"25% of the total number of shares underlying this option will vest on January 1, 2025 and the remaining shares vest 1/36 per month over the next 36 months 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."}],"balance_after":129870,"derivative":{"exercise_price":9.2,"expiration_date":"2034-01-02","underlying":"Common Stock","underlying_shares":129870},"source":{"system":"sec-edgar","filing":"0001209191-24-000827","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919124000827/doc4.xml","form_type":"4"}},{"id":1688633,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Performance Stock Units","published_at":"2024-01-04T21:58:43.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":169173,"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":169173,"derivative":{"underlying":"Common Stock","underlying_shares":169173},"source":{"system":"sec-edgar","filing":"0001209191-24-000827","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919124000827/doc4.xml","form_type":"4"}},{"id":1688632,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2024-01-04T21:58:43.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":121951,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 33,028 on February 15, 2025, 7,622 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2027 and 5,081 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":1329792,"source":{"system":"sec-edgar","filing":"0001209191-24-000827","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919124000827/doc4.xml","form_type":"4"}},{"id":1737365,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2023-11-17T21:18:06.000Z","date":"2023-11-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":11362,"price":7.89,"value":89646.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","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":1207841,"source":{"system":"sec-edgar","filing":"0001209191-23-055745","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919123055745/doc4.xml","form_type":"4"}},{"id":1737364,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2023-11-17T21:18:06.000Z","date":"2023-11-15","kind":"sale","planned":true,"acquired":false,"shares":75000,"price":7.8,"value":585000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 2, 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 $7.565 to $7.955, 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":1219203,"source":{"system":"sec-edgar","filing":"0001209191-23-055745","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919123055745/doc4.xml","form_type":"4"}},{"id":1802203,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2023-08-18T20:31:33.000Z","date":"2023-08-16","kind":"sale","planned":false,"acquired":false,"shares":35869,"price":8.31,"value":298071.39,"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":1294203,"source":{"system":"sec-edgar","filing":"0001209191-23-046554","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919123046554/doc4.xml","form_type":"4"}},{"id":1804134,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2023-08-17T20:54:34.000Z","date":"2023-08-15","kind":"sale","planned":true,"acquired":false,"shares":75000,"price":8.52,"value":639000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 2, 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 $8.22 to $8.69, 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."}],"balance_after":1330072,"source":{"system":"sec-edgar","filing":"0001209191-23-046332","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919123046332/doc4.xml","form_type":"4"}},{"id":1830485,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2023-07-13T20:54:35.000Z","date":"2023-07-11","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":15.02,"value":375500.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 2, 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 $15.01 to $15.08, 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":1405072,"source":{"system":"sec-edgar","filing":"0001209191-23-042226","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919123042226/doc4.xml","form_type":"4"}},{"id":1870592,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2023-06-02T20:37:04.000Z","date":"2023-05-31","kind":"sale","planned":true,"acquired":false,"shares":75000,"price":11.69,"value":876750.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 2, 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 $11.525 to $11.92, inclusive. 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These shares were sold in multiple transactions at prices ranging from $8.245 to $8.53, 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":1459509,"source":{"system":"sec-edgar","filing":"0001209191-23-019687","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919123019687/doc4.xml","form_type":"4"}},{"id":2008431,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2023-02-17T21:43:43.000Z","date":"2023-02-15","kind":"tax_withholding","acquired":false,"shares":17678,"price":13.27,"value":234587.06,"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":1534509,"source":{"system":"sec-edgar","filing":"0001209191-23-010681","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919123010681/doc4.xml","form_type":"4"}},{"id":2069133,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-01-05T00:22:17.000Z","date":"2023-01-01","kind":"grant","acquired":true,"shares":129870,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"25% of the total number of shares underlying this option will vest on January 1, 2024 and the remaining shares vest 1/36 per month over the next 36 months thereafter, subject to continued service to the Issuer through each vesting date. 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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":"F5","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":86806,"derivative":{"underlying":"Common Stock","underlying_shares":86806},"source":{"system":"sec-edgar","filing":"0001209191-22-007037","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919122007037/doc4.xml","form_type":"4"}},{"id":2414584,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Stock Option (right to buy)","published_at":"2022-02-04T00:31:06.000Z","date":"2022-02-01","kind":"grant","acquired":true,"shares":172216,"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 this option will vest on February 1, 2023 and the remaining shares vest 1/36 per month over the next 36 months 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."}],"balance_after":172216,"derivative":{"exercise_price":13.9,"expiration_date":"2032-02-01","underlying":"Common Stock","underlying_shares":172216},"source":{"system":"sec-edgar","filing":"0001209191-22-007037","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919122007037/doc4.xml","form_type":"4"}},{"id":2414583,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2022-02-04T00:31:06.000Z","date":"2022-02-01","kind":"grant","acquired":true,"shares":138313,"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":1576968,"source":{"system":"sec-edgar","filing":"0001209191-22-007037","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919122007037/doc4.xml","form_type":"4"}},{"id":2508226,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-11-17T23:21:11.000Z","date":"2021-11-15","kind":"tax_withholding","acquired":false,"shares":40713,"price":22.5,"value":916042.5,"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":1438655,"source":{"system":"sec-edgar","filing":"0001209191-21-065238","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121065238/doc4.xml","form_type":"4"}},{"id":2586883,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Performance Stock  Units","published_at":"2021-08-30T20:49:26.000Z","date":"2021-08-26","kind":"grant","acquired":true,"shares":379635,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","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":"F4","text":"Equity grant under the Issuer's 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The PSUs are subject to both performance-based and time-based vesting requirements. The performance-based requirement for 1/3 of the units will be satisfied if the Issuer achieves share price targets of $60, $80 and $100 over 60 consecutive trading days during a performance period commencing on Aug. 26, 2022 and ending on Aug. 26, 2026, or on such earlier date as the Reporting Person is no longer serving as the Issuer's CEO or Executive Chairman of the Board of Directors. To the extent any of the performance-based requirements are met, the Reporting Person must also provide continued service to the Issuer through at least Aug. 26, 2024 to receive any shares of common stock underlying the PSUs and through Aug. 26, 2026 to receive all of the shares of common stock underlying the PSUs that have satisfied the applicable performance-based requirements. The grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The PSUs are subject to both performance-based and time-based vesting requirements. The performance-based requirement for 1/3 of the units will be satisfied if the Issuer achieves share price targets of $60, $80 and $100 over 60 consecutive trading days during a performance period commencing on Aug. 26, 2022 and ending on Aug. 26, 2026, or on such earlier date as the Reporting Person is no longer serving as the Issuer's CEO or Executive Chairman of the Board of Directors. To the extent any of the performance-based requirements are met, the Reporting Person must also provide continued service to the Issuer through at least Aug. 26, 2024 to receive any shares of common stock underlying the PSUs and through Aug. 26, 2026 to receive all of the shares of common stock underlying the PSUs that have satisfied the applicable performance-based requirements. The grant may be subject to accelerated vesting in the event the Reporting Person's employment is terminated under certain circumstances."}],"balance_after":379635,"derivative":{"underlying":"Common Stock","underlying_shares":379635},"source":{"system":"sec-edgar","filing":"0001209191-21-053837","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121053837/doc4.xml","form_type":"4"}},{"id":2586882,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-08-30T20:49:26.000Z","date":"2021-08-26","kind":"grant","acquired":true,"shares":136939,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as to 1/3 on each of August 15, 2023, August 15, 2024 and August 15, 2025, 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."}],"balance_after":1479368,"source":{"system":"sec-edgar","filing":"0001209191-21-053837","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121053837/doc4.xml","form_type":"4"}},{"id":2598399,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-08-18T22:31:36.000Z","date":"2021-08-16","kind":"sale","acquired":false,"shares":6341,"price":26.82,"value":170065.62,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","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":1342429,"source":{"system":"sec-edgar","filing":"0001209191-21-052351","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121052351/doc4.xml","form_type":"4"}},{"id":2598398,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-08-18T22:31:36.000Z","date":"2021-08-16","kind":"sale","acquired":false,"shares":9729,"price":28.47,"value":276984.63,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person."},{"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 $28.23 to $29.02, 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":1348770,"source":{"system":"sec-edgar","filing":"0001209191-21-052351","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121052351/doc4.xml","form_type":"4"}},{"id":2598397,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-08-18T22:31:36.000Z","date":"2021-08-16","kind":"sale","acquired":false,"shares":65271,"price":27.81,"value":1815186.51,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person."},{"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 $27.23 to $28.22, 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":1358499,"source":{"system":"sec-edgar","filing":"0001209191-21-052351","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121052351/doc4.xml","form_type":"4"}},{"id":2706003,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-05-19T23:12:39.000Z","date":"2021-05-17","kind":"sale","acquired":false,"shares":105138,"price":25.98,"value":2731485.24,"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":"Adjusted to reflect the acquisition of 2,230 shares under the Magnite, Inc. 2014 Employee Stock Purchase Plan on May 17, 2021."}],"balance_after":1423770,"source":{"system":"sec-edgar","filing":"0001209191-21-034197","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121034197/doc4.xml","form_type":"4"}},{"id":2754648,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-04-07T22:45:09.000Z","date":"2021-04-05","kind":"sale","acquired":false,"shares":518,"price":43.51,"value":22538.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.95 to $43.81, 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 ranges set forth in this footnote."}],"balance_after":1526678,"source":{"system":"sec-edgar","filing":"0001209191-21-025970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025970/doc4.xml","form_type":"4"}},{"id":2754647,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-04-07T22:45:09.000Z","date":"2021-04-05","kind":"sale","acquired":false,"shares":2841,"price":42.39,"value":120429.99,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.90 to $42.89, 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 ranges set forth in this footnote."}],"balance_after":1527196,"source":{"system":"sec-edgar","filing":"0001209191-21-025970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025970/doc4.xml","form_type":"4"}},{"id":2754646,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-04-07T22:45:09.000Z","date":"2021-04-05","kind":"sale","acquired":false,"shares":2926,"price":41.51,"value":121458.26,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person."},{"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 $40.90 to $41.875, 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 ranges set forth in this footnote."}],"balance_after":1530037,"source":{"system":"sec-edgar","filing":"0001209191-21-025970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025970/doc4.xml","form_type":"4"}},{"id":2754645,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-04-07T22:45:09.000Z","date":"2021-04-05","kind":"sale","acquired":false,"shares":16933,"price":40.28,"value":682061.24,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person."},{"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 $39.89 to $40.84, 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 ranges set forth in this footnote."}],"balance_after":1532963,"source":{"system":"sec-edgar","filing":"0001209191-21-025970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025970/doc4.xml","form_type":"4"}},{"id":2754644,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-04-07T22:45:09.000Z","date":"2021-04-05","kind":"sale","acquired":false,"shares":51782,"price":39.48,"value":2044353.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These sales were made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person."},{"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 $38.89 to $39.88, 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 ranges set forth in this footnote."}],"balance_after":1549896,"source":{"system":"sec-edgar","filing":"0001209191-21-025970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025970/doc4.xml","form_type":"4"}},{"id":2758577,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Performance Stock Units","published_at":"2021-04-05T20:36:10.000Z","date":"2021-04-01","kind":"grant","acquired":true,"shares":26291,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","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":"F5","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":"F5","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":26291,"derivative":{"underlying":"Common Stock","underlying_shares":26291},"source":{"system":"sec-edgar","filing":"0001209191-21-025152","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025152/doc4.xml","form_type":"4"}},{"id":2758576,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2021-04-05T20:36:10.000Z","date":"2021-04-01","kind":"grant","acquired":true,"shares":54358,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Equity grant under the Company's 2014 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"25% of the total number of shares underlying this option will vest on April 1, 2022 and the remaining shares vest 1/36 per month over the next 36 months 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."}],"balance_after":54358,"derivative":{"exercise_price":42.8,"expiration_date":"2031-04-01","underlying":"Common Stock","underlying_shares":54358},"source":{"system":"sec-edgar","filing":"0001209191-21-025152","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025152/doc4.xml","form_type":"4"}},{"id":2758575,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2021-04-05T20:36:10.000Z","date":"2021-04-01","kind":"grant","acquired":true,"shares":41742,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units that vest as follows: 11,305 on May 15, 2022, 2,609 on each August 15, November 15, February 15, and May 15 thereafter until February 15, 2025 and 1,738 on May 15, 2025, 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":1601678,"source":{"system":"sec-edgar","filing":"0001209191-21-025152","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000120919121025152/doc4.xml","form_type":"4"}},{"id":2975839,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2020-11-19T00:06:10.000Z","date":"2020-11-16","kind":"sale","acquired":false,"shares":95053,"price":11.06,"value":1051286.18,"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":1559936,"source":{"system":"sec-edgar","filing":"0001595974-20-000155","document":"wf-form4_160574434628259.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000159597420000155/wf-form4_160574434628259.xml","form_type":"4"}},{"id":3120856,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2020-06-05T20:51:31.000Z","date":"2020-05-20","kind":"sale","acquired":false,"shares":54239,"price":5.13,"value":278246.07,"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":"shares","element":"transactionShares","label":"F5","text":"Amended to reflect the correct number of shares sold on behalf of the reporting person pursuant to an arrangement mandated by the Issuer to cover tax withholding obligations associated with the vesting ofrestricted stock units"},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.06 to $5.24, inclusive. The reporting person undertakes to provide The Rubicon Project, Inc., any security holder of The Rubicon Project, Inc., 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 ranges set forth in this footnote."}],"balance_after":1654989,"source":{"system":"sec-edgar","filing":"0001595974-20-000080","document":"wf-form4a_159139027395107.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000159597420000080/wf-form4a_159139027395107.xml","form_type":"4/A","original_submission_date":"2020-05-20"}},{"id":3120855,"issuer":{"id":2049,"kind":"organization","name":"MAGNITE, INC.","symbol":"MGNI"},"owners":[{"id":22425,"kind":"person","name":"BARRETT MICHAEL G.","position":1,"cik":"0001100612","reported_name":"BARRETT MICHAEL G.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2020-06-05T20:51:31.000Z","date":"2020-05-19","kind":"sale","acquired":false,"shares":38630,"price":5.23,"value":202034.9,"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":"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 $5.08 to $5.39, inclusive. The reporting person undertakes to provide The Rubicon Project, Inc., any security holder of The Rubicon Project, Inc., 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 ranges set forth in this footnote."}],"balance_after":1709228,"source":{"system":"sec-edgar","filing":"0001595974-20-000080","document":"wf-form4a_159139027395107.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100612/000159597420000080/wf-form4a_159139027395107.xml","form_type":"4/A","original_submission_date":"2020-05-20"}}],"next_cursor":"2020-06-05T20:51:31.000000Z,3120855"}