definiens: means any transaction, or series of related transactions, whereby Tekmira merges, reorganizes, amalgamates or consolidates with another entity, and the shareholders of Tekmira owning at least fifty percent(50 % ) of the outstanding voting securities of Tekmira immediately prior to such transaction(s ) own less than fifty percent(50 % ) of the outstanding voting securities of Tekmira or the surviving entity as a result of such transaction(s ), but where:(a ) the business of Tekmira immediately prior to such transaction(s ) is the primary business of Tekmira or the surviving entityimmediately after such transaction(s ) ; ( b ) members of the Board of Directors of Tekmira immediately prior to suchtransaction(s ) comprise more than 50 % of the Board of Directors of Tekmira or the surviving entity immediately after suchtransaction(s ) and for the subsequent twelve ( 12 ) months ; and ( c ) the chief executive officer and chief financial officer ofTekmira immediately prior to such transaction(s ) remain the chief executive officer and chief financial officer of Tekmira orthe surviving entity immediately after such transaction(s ) and for the subsequent twelve ( 12 ) months