MAGNITE, INC. — Director's Dealing 2018

May 21, 2018

SEC Form 4/A — Form 4/A

Issuer: RUBICON PROJECT, INC. (RUBI)
CIK: 0001595974
Period of Report: 2018-03-15

Reporting Person: Prusz Joseph R (Global Chief Revenue Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-03-15	Common Stock	A	30000	—	Acquired	267941	Direct
2018-05-15	Common Stock	F	9383	$2.14	Disposed	258558	Direct

Footnotes

F1: Represents restricted stock units that vest as follows: 10,000 on May 15, 2019; 3,750 each November 15 and May 15 thereafter until November 15, 2021; and 1,250 on May 15, 2022.

F2: Granted as compensation for services.

F3: Amended to reflect correct number of amount of securities beneficially owned following reported transactions.

F4: 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.