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Day David

Disclosed activity across 1 company

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22090
SEC CIK
0001523288

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MAGNITE, INC.MGNI · Entity 2049CHIEF FINANCIAL OFFICERAugust 15, 2026August 18, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

MAGNITE, INC.

Report date August 15, 2026 · Filed August 18, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect452,861 Reported balance After 2026-08-15 transaction · row 1
1 source row

Row 1 · 2026-08-15 · Tax withholding · Disposed 14,170 · Balance 452,861

F1: 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.

Filing footnotes · ownership attribution and instrument terms

F1: 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
August 15, 2026 Filed Aug 18, 2026 20:17 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 14,170 $24.73 $350,424.10
Disclosure

SEC source: 0001523288-26-000010 · wk-form4_1787084266.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 452,861

F1 · kind: 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.

Read SEC document
August 13, 2026 Filed Aug 14, 2026 20:16 UTC MAGNITE, INC. MGNI · Entity 2049 GiftCommon Stock 26,258 $0.00 $0.00
Disclosure

SEC source: 0001523288-26-000008 · wk-form4_1786738597.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 467,031

Read SEC document
May 15, 2026 Filed May 19, 2026 21:00 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 14,170 $12.82 $181,659.40
Disclosure

SEC source: 0001523288-26-000005 · form4-05192026_050513.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 493,289

F1 · kind: 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.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 21:30 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 30,617 $11.70 $358,218.90
Disclosure

SEC source: 0001523288-26-000004 · form4-02182026_040212.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 507,459

F1 · kind: 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.

Read SEC document
January 09, 2026 Filed Jan 12, 2026 21:30 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionPerformance Stock Units · Derivative 72,675 $0.00 $0.00
Disclosure

SEC source: 0001523288-26-000002 · form4-01122026_040107.xml · derivative · entry 3

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 72,675 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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.

F1 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

F4 · derivative.exercise_date: 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 72,675 shares.

F4 · derivative.expiration_date: 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 72,675 shares.

Read SEC document
January 09, 2026 Filed Jan 12, 2026 21:30 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 35,169 $16.17 $568,682.73
Disclosure

SEC source: 0001523288-26-000002 · form4-01122026_040107.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 538,076

F2 · kind: 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.

Read SEC document
January 09, 2026 Filed Jan 12, 2026 21:30 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionCommon Stock 72,675 $0.00 $0.00
Disclosure

SEC source: 0001523288-26-000002 · form4-01122026_040107.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 573,245

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

Read SEC document
January 01, 2026 Filed Jan 6, 2026 00:12 UTC MAGNITE, INC. MGNI · Entity 2049 GrantPerformance Stock Units · Derivative 44,231 $0.00 $0.00
Disclosure

SEC source: 0001523288-26-000001 · form4-01062026_120118.xml · derivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,231

Underlying: Common Stock · 44,231 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance stock unit ("PSU") represents a contingent right to receive on vesting one share of the Issuer's common stock.

F2 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

Read SEC document
January 01, 2026 Filed Jan 6, 2026 00:12 UTC MAGNITE, INC. MGNI · Entity 2049 GrantCommon Stock 131,661 $0.00 $0.00
Disclosure

SEC source: 0001523288-26-000001 · form4-01062026_120118.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 500,570

F1 · shares: Represents restricted stock units that vest as follows: 35,658 on February 15, 2027, 8,229 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2029 and 5,484 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.

F2 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 23:00 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 13,197 $14.15 $186,737.55
Disclosure

SEC source: 0001523288-25-000005 · form4-11182025_061101.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 368,909

F1 · kind: 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.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 20:30 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 13,366 $23.85 $318,779.10
Disclosure

SEC source: 0001415889-25-022456 · form4-08202025_040822.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 382,106

F1 · kind: 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.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 21:43 UTC MAGNITE, INC. MGNI · Entity 2049 GiftCommon Stock 26,374 $0.00 $0.00
Disclosure

SEC source: 0001415889-25-022353 · form4-08192025_090803.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 395,472

Read SEC document
June 30, 2025 Filed Jul 2, 2025 20:15 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 21,682 $22.00 $477,004.00
Disclosure

SEC source: 0001415889-25-019023 · form4-07022025_040731.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 421,846

F1 · kind: The reported transaction were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

Read SEC document
June 26, 2025 Filed Jun 26, 2025 21:21 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionEmployee Stock Option (Right to Buy) · Derivative 36,000 $0.00 Strike: $5.28 $0.00
Disclosure

SEC source: 0001415889-25-018286 · form4-06262025_090617.xml · derivative · entry 6

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,784

Underlying: Common Stock · 36,000 shares

Expires 2030-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

F3 · price: Granted as compensation for services.

F2 · derivative.exercise_date: 25% of the stock options vested on April 1, 2021 and the remaining options shares vested in 36 equal installments each calendar month thereafter.

Read SEC document
June 26, 2025 Filed Jun 26, 2025 21:21 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 36,000 $20.95 $754,200.00
Disclosure

SEC source: 0001415889-25-018286 · form4-06262025_090617.xml · nonDerivative · entry 4

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 443,528

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

Read SEC document
June 26, 2025 Filed Jun 26, 2025 21:21 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionCommon Stock 36,000 $5.28 $190,080.00
Disclosure

SEC source: 0001415889-25-018286 · form4-06262025_090617.xml · nonDerivative · entry 3

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 479,528

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

Read SEC document
June 24, 2025 Filed Jun 26, 2025 21:21 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionEmployee Stock Option (Right to Buy) · Derivative 35,000 $0.00 Strike: $5.28 $0.00
Disclosure

SEC source: 0001415889-25-018286 · form4-06262025_090617.xml · derivative · entry 5

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 80,784

Underlying: Common Stock · 35,000 shares

Expires 2030-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

F3 · price: Granted as compensation for services.

F2 · derivative.exercise_date: 25% of the stock options vested on April 1, 2021 and the remaining options shares vested in 36 equal installments each calendar month thereafter.

Read SEC document
June 24, 2025 Filed Jun 26, 2025 21:21 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 35,000 $19.95 $698,250.00
Disclosure

SEC source: 0001415889-25-018286 · form4-06262025_090617.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 443,528

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

Read SEC document
June 24, 2025 Filed Jun 26, 2025 21:21 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionCommon Stock 35,000 $5.28 $184,800.00
Disclosure

SEC source: 0001415889-25-018286 · form4-06262025_090617.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 478,528

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

Read SEC document
June 18, 2025 Filed Jun 20, 2025 20:26 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionEmployee Stock Option (Right to Buy) · Derivative 38,146 $0.00 Strike: $4.92 $0.00
Disclosure

SEC source: 0001415889-25-017858 · form4-06202025_080628.xml · derivative · entry 3

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 38,146 shares

Expires 2029-02-20

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

F3 · price: Granted as compensation for services.

F2 · derivative.exercise_date: 25% of the stock options vested on February 1, 2020 and the remaining option shares vested in 36 equal installments each calendar month thereafter.

Read SEC document
June 18, 2025 Filed Jun 20, 2025 20:26 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 38,146 $18.95 $722,866.70
Disclosure

SEC source: 0001415889-25-017858 · form4-06202025_080628.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 443,528

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

Read SEC document
June 18, 2025 Filed Jun 20, 2025 20:26 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionCommon Stock 38,146 $4.92 $187,678.32
Disclosure

SEC source: 0001415889-25-017858 · form4-06202025_080628.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 481,674

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2025.

Read SEC document
May 15, 2025 Filed May 16, 2025 21:40 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 13,865 $15.88 $220,176.20
Disclosure

SEC source: 0001415889-25-013471 · form4-05162025_050507.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 443,528

F1 · kind: 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.

Read SEC document
February 15, 2025 Filed Feb 19, 2025 21:24 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 31,113 $20.00 $622,260.00
Disclosure

SEC source: 0001415889-25-004618 · form4-02192025_090239.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 457,393

F1 · kind: 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.

Read SEC document
February 07, 2025 Filed Feb 7, 2025 23:43 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionEmployee Stock Option (Right to Buy) · Derivative 39,000 $0.00 Strike: $4.92 $0.00
Disclosure

SEC source: 0001415889-25-003396 · form4-02072025_110241.xml · derivative · entry 4

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 38,146

Underlying: Common Stock · 39,000 shares

Expires 2029-02-20

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2024.

F3 · price: Granted as compensation for services.

F2 · derivative.exercise_date: 25% of the stock options vested on February 1, 2020 and the remaining option shares have vested or will vest in 36 equal installments each calendar month thereafter.

Read SEC document
February 07, 2025 Filed Feb 7, 2025 23:43 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 39,000 $20.00 $780,000.00
Disclosure

SEC source: 0001415889-25-003396 · form4-02072025_110241.xml · nonDerivative · entry 3

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 488,506

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2024.

Read SEC document
February 07, 2025 Filed Feb 7, 2025 23:43 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionCommon Stock 39,000 $4.92 $191,880.00
Disclosure

SEC source: 0001415889-25-003396 · form4-02072025_110241.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 527,506

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2024.

Read SEC document
February 06, 2025 Filed Feb 7, 2025 23:43 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 13,245 $18.35 $243,045.75
Disclosure

SEC source: 0001415889-25-003396 · form4-02072025_110241.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 488,506

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2024.

Read SEC document
January 09, 2025 Filed Jan 13, 2025 22:43 UTC MAGNITE, INC. MGNI · Entity 2049 GrantPerformance Stock Units · Derivative 43,000 $0.00 $0.00
Disclosure

SEC source: 0001415889-25-001406 · form4-01132025_100157.xml · derivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,000

Underlying: Common Stock · 43,000 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance stock unit ("PSU") represents a contingent right to receive on vesting one share of the Issuer's common stock.

F2 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

Read SEC document
January 09, 2025 Filed Jan 13, 2025 22:43 UTC MAGNITE, INC. MGNI · Entity 2049 GrantCommon Stock 127,737 $0.00 $0.00
Disclosure

SEC source: 0001415889-25-001406 · form4-01132025_100157.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 501,751

F1 · shares: Represents restricted stock units that vest as follows: 34,595 on February 15, 2026, 7,984 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2028 and 5,318 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.

F2 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

Read SEC document
January 03, 2025 Filed Jan 7, 2025 22:27 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 13,345 $17.00 $226,865.00
Disclosure

SEC source: 0001415889-25-001033 · form4-01072025_100102.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 374,014

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2024.

Read SEC document
December 17, 2024 Filed Dec 18, 2024 22:15 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 13,500 $16.32 $220,320.00
Disclosure

SEC source: 0001415889-24-029756 · form4-12182024_101228.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 387,359

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.06 to $16.78, 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.

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December 16, 2024 Filed Dec 18, 2024 22:15 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 11,644 $16.44 $191,427.36
Disclosure

SEC source: 0001415889-24-029756 · form4-12182024_101228.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 400,859

F1 · kind: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.31 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.

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November 15, 2024 Filed Nov 20, 2024 01:08 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 9,128 $15.85 $144,678.80
Disclosure

SEC source: 0001415889-24-027287 · form4-11202024_011136.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 412,503

F1 · kind: 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.

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August 15, 2024 Filed Aug 16, 2024 21:08 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 9,124 $12.51 $114,141.24
Disclosure

SEC source: 0001415889-24-021477 · form4-08162024_090812.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 421,631

F1 · kind: 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.

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July 15, 2024 Filed Jul 17, 2024 20:25 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 19,077 $15.00 $286,155.00
Disclosure

SEC source: 0001415889-24-019672 · form4-07172024_080748.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 430,755

F1 · kind: The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 14, 2023.

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June 12, 2024 Filed Jun 14, 2024 20:30 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 21,299 $14.01 $298,398.99
Disclosure

SEC source: 0001415889-24-016936 · form4-06142024_040626.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 449,832

F1 · kind: The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 14, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.00 to $14.01, 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.

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June 03, 2024 Filed Jun 5, 2024 20:53 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 20,732 $13.00 $269,516.00
Disclosure

SEC source: 0001415889-24-015585 · form4-06052024_080625.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 471,131

F1 · kind: The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 14, 2023.

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May 16, 2024 Filed May 17, 2024 21:00 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 19,370 $12.00 $232,440.00
Disclosure

SEC source: 0001415889-24-013563 · form4-05172024_050518.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 491,863

F2 · kind: The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 14, 2023.

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May 15, 2024 Filed May 17, 2024 21:00 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 12,380 $9.80 $121,324.00
Disclosure

SEC source: 0001415889-24-013563 · form4-05172024_050518.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 511,233

F1 · kind: 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.

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February 15, 2024 Filed Feb 16, 2024 21:23 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 30,316 $9.74 $295,277.84
Disclosure

SEC source: 0001415889-24-004130 · form4-02162024_090218.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 523,613

F1 · kind: 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.

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February 01, 2024 Filed Feb 5, 2024 21:19 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 14,417 $9.06 $130,618.02
Disclosure

SEC source: 0001415889-24-002505 · form4-02052024_090237.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 553,929

F1 · kind: 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.

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January 02, 2024 Filed Jan 4, 2024 21:59 UTC MAGNITE, INC. MGNI · Entity 2049 GrantPerformance Stock Units · Derivative 57,519 $0.00 $0.00
Disclosure

SEC source: 0001209191-24-000828 · doc4.xml · derivative · entry 2

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,519

Underlying: Common Stock · 57,519 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance stock unit ("PSU") represents a contingent right to receive on vesting one share of the Issuer's common stock.

F2 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

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January 02, 2024 Filed Jan 4, 2024 21:59 UTC MAGNITE, INC. MGNI · Entity 2049 GrantCommon Stock 161,247 $0.00 $0.00
Disclosure

SEC source: 0001209191-24-000828 · doc4.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 568,346

F1 · shares: Represents restricted stock units that vest as follows: 43,671 on February 15, 2025, 10,078 on each May 15, August 15, November 15, and February 15 thereafter until November 15, 2027 and 6,718 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.

F2 · price: Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.

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November 15, 2023 Filed Nov 17, 2023 21:21 UTC MAGNITE, INC. MGNI · Entity 2049 Tax withholdingCommon Stock 8,767 $7.89 $69,171.63
Disclosure

SEC source: 0001209191-23-055750 · doc4.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 407,099

F1 · kind: 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.

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August 16, 2023 Filed Aug 18, 2023 20:22 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 9,078 $8.31 $75,438.18
Disclosure

SEC source: 0001209191-23-046539 · doc4.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 415,866

F1 · kind: 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.

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July 11, 2023 Filed Jul 13, 2023 20:53 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionEmployee Stock Option (Right to Buy) · Derivative 9,584 $0.00 Strike: $1.97 $0.00
Disclosure

SEC source: 0001209191-23-042224 · doc4.xml · derivative · entry 3

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9,584 shares

Expires 2028-03-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This exercise and subsequent sale was made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person on March 13, 2023.

F3 · price: Granted as compensation for services.

F2 · derivative.exercise_date: 25% of the shares originally subject to the option vested on February 1, 2019 and the remaining shares vested in 36 equal monthly installments thereafter.

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July 11, 2023 Filed Jul 13, 2023 20:53 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 9,584 $15.00 $143,760.00
Disclosure

SEC source: 0001209191-23-042224 · doc4.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 424,944

F1 · kind: This exercise and subsequent sale was made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person on March 13, 2023.

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July 11, 2023 Filed Jul 13, 2023 20:53 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionCommon Stock 9,584 $1.97 $18,880.48
Disclosure

SEC source: 0001209191-23-042224 · doc4.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 434,528

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This exercise and subsequent sale was made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person on March 13, 2023.

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June 29, 2023 Filed Jun 30, 2023 21:03 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 21,564 $14.00 $301,896.00
Disclosure

SEC source: 0001209191-23-040364 · doc4.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 424,944

F1 · kind: This sale was made pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person on March 13, 2023.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.