definiens: means ( i ) in the case of the Closing Consideration Shares, the volume - weighted averageclosing price per share of the Purchaser ’s Common Stock on the Nasdaq Capital Market for the thirty ( 30 ) TradingDays ending on the December 18, 2015 ; ( ii ) in the case of the Milestone Consideration Shares, the volume - weightedaverage closing price per share of the Purchaser ’s Common Stock on the Nasdaq Capital Market for the thirty(30 ) Trading Days ending on the Trading Day two ( 2 ) Trading Days prior to the occurrence of a Milestone Event ; or(iii ) in the case of payment pursuant to the last sentence of Section 1.5 ( Payment of Milestone Consideration ), thevolume - weighted average closing price per share of the Purchaser ’s Common Stock on the Nasdaq Capital Market forthe thirty ( 30 ) Trading Days ending on the Trading Day two ( 2 ) Trading Days prior to the occurrence of a Sale ofPurchaser