definiens: mean s the shares of Common Stock, and any shares issued upon any stock split o r stock dividend in respect of such shares of Commo n Stock ; provided, however, that with respect to any particu lar Registrable Security, such security shall cease to be a Registrable Security when, as of the date of determ ination, ( i ) it has been effectively registered und er the Securities Act and disposed of pursuant thereto, ( i i ) registration under the Securities Act is no long er required for subsequent public distribution of such security und er Rule 144(k ) promulgated under the Securities Act or otherwise, or ( iii ) it is no longer held by the Hol der . The term means any an d / or all of the securities falling within the foregoing definit ion of a In the event of an y merger, reorganization, consolidation, recapitalization or other change in corporate structure affecting the C ommon Stock, such adjustment shall be made in the definit ion of as is appropriate in order to prevent any dilution or enlargement of the rights g ranted pursuant to this Section 8