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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
October 14, 2020 Filed Oct 15, 2020 20:08 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 11,779 $9.50 $111,900.50
Disclosure

SEC source: 0001595974-20-000141 · wf-form4_160279247167402.xml · nonDerivative · entry 3

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 311,624

F1 · acquired: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

Read SEC document
October 14, 2020 Filed Oct 15, 2020 20:08 UTC MAGNITE, INC. MGNI · Entity 2049 Exercise / conversionCommon Stock 11,779 $1.97 $23,204.63
Disclosure

SEC source: 0001595974-20-000141 · wf-form4_160279247167402.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 323,403

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 · acquired: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

Read SEC document
October 13, 2020 Filed Oct 15, 2020 20:08 UTC MAGNITE, INC. MGNI · Entity 2049 SaleCommon Stock 13,074 $8.90 $116,358.60
Disclosure

SEC source: 0001595974-20-000141 · wf-form4_160279247167402.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 311,624

F1 · acquired: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

Read SEC document
June 08, 2020 Filed Jun 10, 2020 20:27 UTC MAGNITE, INC. RUBI · Entity 2049 Exercise / conversionEmployee Stock Option (Right to Buy) · Derivative 10,000 $0.00 Strike: $1.97 $0.00
Disclosure

SEC source: 0001595974-20-000094 · wf-form4_159182081372819.xml · derivative · entry 3

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,817

Underlying: Common Stock · 10,000 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 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F3 · price: Award of stock options granted as compensation for services

F2 · derivative.exercise_date: 25% of the stock options vested on February 1, 2019 and the remaining options have vested or will vest in 36 equal installments each calendar month thereafter.

Read SEC document
June 08, 2020 Filed Jun 10, 2020 20:27 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 10,000 $8.69 $86,900.00
Disclosure

SEC source: 0001595974-20-000094 · wf-form4_159182081372819.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 324,698

F1 · acquired: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

Read SEC document
June 08, 2020 Filed Jun 10, 2020 20:27 UTC MAGNITE, INC. RUBI · Entity 2049 Exercise / conversionCommon Stock 10,000 $1.97 $19,700.00
Disclosure

SEC source: 0001595974-20-000094 · wf-form4_159182081372819.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 334,698

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 · acquired: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

Read SEC document
June 05, 2020 Filed Jun 6, 2020 00:23 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 29,018 $7.90 $229,242.20
Disclosure

SEC source: 0001595974-20-000088 · wf-form4_159140298670776.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 324,698

F1 · shares: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

Read SEC document
May 20, 2020 Filed May 20, 2020 23:29 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 12,965 $5.13 $66,510.45
Disclosure

SEC source: 0001595974-20-000063 · wf-form4_159001734572103.xml · nonDerivative · entry 3

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 355,358

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.

F4 · price: 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 herein.

Read SEC document
May 20, 2020 Filed Jun 5, 2020 20:51 UTC Amendment MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 14,607 $5.13 $74,933.91
Disclosure

SEC source: 0001595974-20-000081 · wf-form4a_159139029507069.xml · nonDerivative · entry 3

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 353,716

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.

F4 · shares: 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

F5 · price: 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 herein.

Read SEC document
May 19, 2020 Filed May 20, 2020 23:29 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 10,397 $5.23 $54,376.31
Disclosure

SEC source: 0001595974-20-000063 · wf-form4_159001734572103.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 368,323

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.

F3 · price: 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 herein.

Read SEC document
May 19, 2020 Filed Jun 5, 2020 20:51 UTC Amendment MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 10,397 $5.23 $54,376.31
Disclosure

SEC source: 0001595974-20-000081 · wf-form4a_159139029507069.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 368,323

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.

F3 · price: 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 herein.

Read SEC document
May 18, 2020 Filed May 20, 2020 23:29 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 11,146 $5.43 $60,522.78
Disclosure

SEC source: 0001595974-20-000063 · wf-form4_159001734572103.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 378,720

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.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.31 to $5.63, 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 herein.

Read SEC document
May 18, 2020 Filed Jun 5, 2020 20:51 UTC Amendment MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 11,146 $5.43 $60,522.78
Disclosure

SEC source: 0001595974-20-000081 · wf-form4a_159139029507069.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 378,720

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.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.31 to $5.63, 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 herein.

Read SEC document
April 01, 2020 Filed Apr 3, 2020 21:00 UTC MAGNITE, INC. RUBI · Entity 2049 GrantStock Option (right to buy) · Derivative 115,784 $0.00 Strike: $5.28 $0.00
Disclosure

SEC source: 0001595974-20-000042 · wf-form4_158594763586041.xml · derivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 115,784

Underlying: Common Stock · 115,784 shares

Expires 2030-04-01

F2 · price: Granted as compensation for services.

F3 · derivative.exercise_date: 25% of the stock options will vest on April 1, 2021 and the remaining option shares will become exercisable in 36 equal installments each calendar month thereafter.

Read SEC document
April 01, 2020 Filed Apr 3, 2020 21:00 UTC MAGNITE, INC. RUBI · Entity 2049 GrantCommon Stock 153,993 $0.00 $0.00
Disclosure

SEC source: 0001595974-20-000042 · wf-form4_158594763586041.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 389,866

F1 · shares: Represents restricted stock units that vest as follows: 41,706 on May 15, 2021, 9,625 on each August 15, November 15, February 15, and May 15 thereafter until February 15, 2024 and 6,412 on May 15, 2024.

F2 · price: Granted as compensation for services.

Read SEC document
January 16, 2020 Filed Jan 22, 2020 00:12 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 24,547 $10.41 $255,534.27
Disclosure

SEC source: 0001595974-20-000012 · wf-form4_157965195536695.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 235,873

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.25 to $10.51, 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.

Read SEC document
January 16, 2020 Filed Jan 22, 2020 00:12 UTC MAGNITE, INC. RUBI · Entity 2049 Tax withholdingCommon Stock 25,453 $10.45 $265,983.85
Disclosure

SEC source: 0001595974-20-000012 · wf-form4_157965195536695.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 260,420

F1 · kind: Shares withheld by the issuer to cover the reporting person's tax liability incurred upon the vesting of the reporting person's restricted stock units.

Read SEC document
November 18, 2019 Filed Nov 20, 2019 01:44 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 7,711 $7.57 $58,372.27
Disclosure

SEC source: 0001595974-19-000143 · wf-form4_157421424252813.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 285,873

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.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.53 to $7.57, 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.

Read SEC document
May 17, 2019 Filed May 17, 2019 22:02 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 12,257 $6.26 $76,728.82
Disclosure

SEC source: 0001595974-19-000084 · wf-form4_155813052532560.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 293,584

F3 · kind: Sale effected pursuant to a Rule 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.24 to $6.29, inclusive.

Read SEC document
May 16, 2019 Filed May 17, 2019 22:02 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 12,999 $6.19 $80,463.81
Disclosure

SEC source: 0001595974-19-000084 · wf-form4_155813052532560.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 305,841

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 and restricted stock units.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.05 to $6.30, 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 footnotes (2) and (4) to this Form 4.

Read SEC document
March 18, 2019 Filed Mar 19, 2019 23:41 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 55,837 $6.86 $383,041.82
Disclosure

SEC source: 0001595974-19-000053 · wf-form4_155303888612372.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 318,840

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.79 to $6.94, 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 footnote (2) this Form 4.

Read SEC document
February 20, 2019 Filed Feb 23, 2019 00:53 UTC MAGNITE, INC. RUBI · Entity 2049 GrantEmployee Stock Option (Right to Buy) · Derivative 161,000 $0.00 Strike: $4.92 $0.00
Disclosure

SEC source: 0001595974-19-000029 · wf-form4_155088318778700.xml · derivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 161,000

Underlying: Common Stock · 161,000 shares

Expires 2029-02-20

F2 · price: Granted as compensation for services.

F3 · derivative.exercise_date: 25% of the stock options will vest on February 1, 2020 and the remaining option shares will become exercisable in 36 equal installments each calendar month thereafter.

Read SEC document
February 20, 2019 Filed Feb 23, 2019 00:53 UTC MAGNITE, INC. RUBI · Entity 2049 GrantCommon Stock 188,000 $0.00 $0.00
Disclosure

SEC source: 0001595974-19-000029 · wf-form4_155088318778700.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 374,677

F1 · shares: Represents restricted stock units that vest as follows: 58,750 on May 15, 2020, 23,500 on each November 15 and May 15 thereafter until November 15, 2022, and 11,750 on May 15, 2023.

F2 · price: Granted as compensation for services.

Read SEC document
November 15, 2018 Filed Nov 16, 2018 01:54 UTC MAGNITE, INC. RUBI · Entity 2049 Tax withholdingCommon Stock 5,742 $4.62 $26,528.04
Disclosure

SEC source: 0001595974-18-000112 · wf-form4_154233326673678.xml · nonDerivative · entry 4

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 186,677

F4 · kind: Shares withheld by the issuer to cover the reporting person's tax liability incurred upon the vesting of the reporting person's restricted shares and restricted stock units.

Read SEC document
November 15, 2018 Filed Nov 16, 2018 01:54 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 24,456 $4.71 $115,187.76
Disclosure

SEC source: 0001595974-18-000112 · wf-form4_154233326673678.xml · nonDerivative · entry 3

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 192,419

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.70 to $4.74, inclusive.

Read SEC document
November 14, 2018 Filed Nov 16, 2018 01:54 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 24,146 $4.70 $113,486.20
Disclosure

SEC source: 0001595974-18-000112 · wf-form4_154233326673678.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 216,875

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.70 to $4.71, 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 footnotes (2) and (3) to this Form 4.

Read SEC document
November 13, 2018 Filed Nov 16, 2018 01:54 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 5,196 $4.70 $24,421.20
Disclosure

SEC source: 0001595974-18-000112 · wf-form4_154233326673678.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 241,021

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

Read SEC document
March 15, 2018 Filed Mar 17, 2018 01:35 UTC MAGNITE, INC. RUBI · Entity 2049 GrantEmployee Stock Option (Right to Buy) · Derivative 41,817 $0.00 Strike: $1.97 $0.00
Disclosure

SEC source: 0001595974-18-000030 · wf-form4_152125053342124.xml · derivative · entry 2

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,817

Underlying: Common Stock · 41,817 shares

Expires 2028-03-15

F2 · price: Granted as compensation for services.

F3 · derivative.exercise_date: 25% of the stock options will vest on February 1, 2019 and the remaining option shares will become exercisable in 36 equal installments each calendar month thereafter.

Read SEC document
March 15, 2018 Filed Mar 17, 2018 01:35 UTC MAGNITE, INC. RUBI · Entity 2049 GrantCommon Stock 48,786 $0.00 $0.00
Disclosure

SEC source: 0001595974-18-000030 · wf-form4_152125053342124.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 246,217

F1 · shares: Represents restricted stock units that vest as follows: 15,246 on May 15, 2019, 6,098 on each November 15 and May 15 thereafter until November 15, 2021, and 3,050 on May 15, 2022.

F2 · price: Granted as compensation for services.

Read SEC document
January 15, 2018 Filed Jan 17, 2018 23:02 UTC MAGNITE, INC. RUBI · Entity 2049 GrantCommon Stock 100,000 $0.00 $0.00
Disclosure

SEC source: 0001595974-18-000002 · wf-form4_151623013335705.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 197,431

F1 · shares: Represents restricted stock units that vest as follows: 50,000 on January 15, 2019 and 50,000 on January 15, 2020.

F2 · price: Granted as compensation for services.

Read SEC document
November 15, 2017 Filed Nov 18, 2017 00:12 UTC MAGNITE, INC. RUBI · Entity 2049 Tax withholdingCommon Stock 5,897 $1.89 $11,145.33
Disclosure

SEC source: 0001595974-17-000069 · wf-form4_151096394888861.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,431

F1 · kind: Shares withheld by the issuer to cover the reporting person's tax liability incurred upon the vesting of the reporting person's restricted shares and restricted stock units.

Read SEC document
May 15, 2017 Filed May 18, 2017 00:31 UTC MAGNITE, INC. RUBI · Entity 2049 Tax withholdingCommon Stock 20,446 $5.83 $119,200.18
Disclosure

SEC source: 0001595974-17-000028 · wf-form4_149506749329498.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 103,328

F1 · kind: Shares withheld by the issuer to cover the reporting person's tax liability incurred upon the vesting of the reporting person's restricted shares.

Read SEC document
March 15, 2017 Filed Mar 18, 2017 01:46 UTC MAGNITE, INC. RUBI · Entity 2049 GrantStock Option (right to buy) · Derivative 32,167 $0.00 Strike: $6.06 $0.00
Disclosure

SEC source: 0001595974-17-000012 · wf-form4_148980159704663.xml · derivative · entry 2

Day David · CIK 0001523288 · CFO & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,167

Underlying: Common Stock · 32,167 shares

Expires 2027-03-15

F2 · price: Granted as compensation for services.

F3 · derivative.exercise_date: 25% of the stock options will vest on February 1, 2018 and the remaining option shares will become exercisable in 36 equal installments each calendar month thereafter.

Read SEC document
March 15, 2017 Filed Mar 18, 2017 01:46 UTC MAGNITE, INC. RUBI · Entity 2049 GrantCommon Stock 37,528 $0.00 $0.00
Disclosure

SEC source: 0001595974-17-000012 · wf-form4_148980159704663.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 123,774

F1 · shares: Represents restricted stock units that vest as follows: 11,727 on May 15, 2018, 4,691 on each November 15 and May 15 thereafter until November 15, 2020, and 2,346 on May 15, 2021.

F2 · price: Granted as compensation for services.

Read SEC document
November 15, 2016 Filed Nov 18, 2016 02:14 UTC MAGNITE, INC. RUBI · Entity 2049 SaleCommon Stock 1,202 $7.84 $9,423.68
Disclosure

SEC source: 0001595974-16-000054 · wf-form4_147943526709139.xml · nonDerivative · entry 2

Day David · CIK 0001523288 · CFO & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 86,246

F3 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.82 to $7.87, 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 footnote (4) to this Form 4.

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November 15, 2016 Filed Nov 18, 2016 02:14 UTC MAGNITE, INC. RUBI · Entity 2049 Tax withholdingCommon Stock 3,156 $7.72 $24,364.32
Disclosure

SEC source: 0001595974-16-000054 · wf-form4_147943526709139.xml · nonDerivative · entry 1

Day David · CIK 0001523288 · CFO & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,448

F1 · kind: Shares withheld by the issuer to cover the reporting person's tax liability incurred upon the vesting of the reporting person's restricted shares.

F2 · balance_after: Includes 1,202 shares acquired under the The Rubicon Project, Inc. 2014 Employee Stock Purchase Plan on November 15, 2016.

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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.