definiens: means, following the Effective Date, the occurrence that any Third Party, or group of Third Partiesacting in concert ( collectively, an ): ( a ) becomes the beneficial owner, directly or indirectly, of more thanfifty percent ( 50 % ) of the total voting power of the stock of Enanta or its Affiliates then outstanding and normallyentitled to vote in elections of its or their board of directors ; ( b ) consolidates with or merges with or into Enanta or itsAffiliates pursuant to a transaction in which more than fifty percent ( 50 % ) of the total voting power of the votingsecurities outstanding of the surviving entity normally entitled to vote in elections of directors ( or equivalentgoverning body ) is not held by the Persons holding at least fifty percent ( 50 % ) of the outstanding shares of the relevantentity preceding such consolidation or merger ; ( c ) obtains, whether through conveyance, assignment, transfer or lease, all or substantially all of the assets of Enanta or its Affiliates ; or ( d ) acquires effective control of the management andpolicies of Enanta or its Affiliates