Table of Contents (16) This number includes 6,120 shares of Class A common stock owned directly by Mr. Keeton; 404,966 shares of Class A common stock issuable in exchange for vested Class B Units including those that will be vested within 60 days of February 27, 2019, based on an assumed price of $41.82 per share (the closing price of our Class A common stock on the NYSE on February 27, 2019); 3,298 shares of Class A common stock issuable upon the exercise of options that vest on April 1, 2019; and 2,885 shares of Class A common stock issuable upon the vesting and settlement of restricted stock units that vest on April 1, 2019, inclusive of shares to be withheld for tax purposes. This number excludes 12,022 shares of Class A common stock underlying performance-based RSUs that are subject to vesting on the date that performance objectives are achieved, so long as it is achieved prior to April 27, 2027. (17) This number includes 20,000 shares of Class A common stock owned directly by Mr. Platt and 2,500 shares of Class A common stock held directly and jointly by Mr. Platt’s parents. This number also includes 130,667 shares of Class A common stock issuable in exchange for vested Class B Units including those that will be vested within 60 days of February 27, 2019, based on an assumed price of $41.82 per share (the closing price of our Class A common stock on the NYSE on February 27, 2019); 10,309 options to purchase shares of Class A common stock that vested on April 27, 2018; and 10,310 options to purchase shares of Class A common stock that vest on April 27, 2019. This number excludes 130,612 shares of Class A common stock issuable in exchange for Class B common stock and LLC Units held by Mr. Platt and his dependent son, based on an assumed price of $41.82 per share (the closing price of our Class A common stock on the NYSE on February 27, 2019). These shares of Class A common stock represent less than 1% of the shares of Class A common stock that would be outstan