Subject to the limitations contained herein and Section 2.1(b) , the Option will vest and become exercisable according to the following Vesting Schedule (the “ Vesting Schedule ”): the total number of Shares subject to the Option shall vest in [ twenty-five percent (25%) ] increments (rounded down to the next whole number of Shares) on each of the [ first, second, third and fourth ] anniversaries of the Grant Date.