Subject to Sections 3 and 4, the RSUs shall vest as follows: (a) upon the first anniversary of the Date of Grant, one-third of the RSUs granted on the Date of Grant shall vest, provided that the Grantee is employed by an Employing Company on such anniversary, (b) upon the two year anniversary of the Date of Grant, an additional one-third of the RSUs granted on the Date of Grant shall vest, provided that the Grantee is employed by an Employing Company on such anniversary, and (c) upon the three year anniversary of the Date of Grant, the remaining one-third of the RSUs granted on the Date of Grant shall vest, provided that the Grantee is employed by an Employing Company on such anniversary. All fractional unvested RSUs, if any, resulting from the ratable vesting shall vest as whole RSUs upon the latest vesting date.