2/24/2018 S-1 Table of Contents • 25,061,536 shares of our Class A common stock and 18,240,237 shares of our Class B common stock subject to RSUs outstanding, but for which the service condition was not satisfied, as of December 31, 2017; • 14,865,820 shares of our Class A common stock subject to RSUs granted after December 31, 2017; • 98,969,443 shares of our Class A common stock reserved for future issuance under our equity compensation plans, consisting of: • 77,297,109 shares of our Class A common stock to be reserved for future issuance under our 2018 Equity Incentive Plan, or our 2018 Plan, which will become effective prior to the completion of this offering (including the shares that will be repurchased by us in connection with the RSU Settlement); • 15,467,085 shares of our Class A common stock reserved for future issuance under our 2017 Equity Incentive Plan, or our 2017 Plan, which number of shares includes an additional 2,000,000 shares of our Class A common stock reserved for issuance under our 2017 Plan that was approved by our Board of Directors in February 2018 (and which we expect our stockholders to approve), 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 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. To the extent that any outstanding options to purchase our common stock are exercised, RSUs are settled or new awards are granted under our equity compensation plans, there will be further dilution to investors participating in this offering. 54 https://www.sec.gov/Archives/edgar/data/1467623/000119312518055809/d451946ds1.htm 61/235