2/24/2018 S-1 Table of Contents and will be added to the shares of our Class A common stock to be reserved for future issuance under our 2018 Plan upon its effectiveness; • 6,205,249 shares of our Class A common stock to be reserved for future issuance under our 2018 Employee Stock Purchase Plan, or our ESPP, which will become effective prior to the completion of this offering, but no offering periods under the ESPP will commence unless and until otherwise determined by our Board of Directors; and • 68,257,739 shares of our Class C common stock reserved for future issuance under certain other equity compensation plans, consisting of: • 62,052,490 shares of our Class C common stock to be reserved for future issuance under our 2018 Class C Stock Incentive Plan, or our 2018 Class C Plan, which will become effective prior to the completion of this offering; and • 6,205,249 shares of our Class C common stock to be reserved for future issuance under our 2018 Class C Employee Stock Purchase Plan, or our Class C ESPP, which will become effective prior to the completion of this offering, but no offering periods under the Class C ESPP will commence unless and until otherwise determined by our Board of Directors. Our 2018 Plan and ESPP each provides for annual automatic increases in the number of shares of our Class A common stock reserved thereunder, and our 2018 Plan also provides for increases to the number of shares of our Class A common stock that may be granted thereunder based on shares under our 2008 Equity Incentive Plan, or our 2008 Plan, and 2017 Plan that expire, are forfeited, or otherwise repurchased by us, as more fully described in the section titled “Executive Compensation—Employee Benefits and Stock Plans.” Additionally, if and when our Board of Directors determines to use our 2018 Class C Plan and Class C ESPP, such plans will provide for annual automatic increases in the number of shares of our Class C common stock reserved thereunder. Except as otherwise indicated, all information in this prospectus assumes: • the Capital Stock Conversions will occur immediately prior to the completion of this offering; • the filing and effectiveness of our amended and restated certificate of incorporation in Delaware and the effectiveness of our amended and restated bylaws, each of which will occur immediately prior to the completion of this offering; • the conversion of shares of our Class B common stock held by certain selling stockholders into an equivalent number of shares of our Class A common stock upon the sale by the selling stockholders in this offering; • no exercise of outstanding stock options or settlement of outstanding RSUs subsequent to December 31, 2017, other than the RSU Settlement; and • no exercise by the underwriters of their option to purchase up to an additional shares of our Class A common stock from us and the selling stockholders. 10 https://www.sec.gov/Archives/edgar/data/1467623/000119312518055809/d451946ds1.htm 17/235