Joint Filer Information

Name:	Elan Science Three Limited
Address:	Treasury Building, Lower Grand Canal Street,
	Dublin 2,  Ireland
Designated Filer:	Elan Corporation, plc
Issuer & Ticker Symbol:	Alkermes plc (ALKS)
Date of Earliest
Transaction Required
to be Reported:	3/13/12
Signature:	/s/        William F. Daniel
	Name:  William F. Daniel
	Title:    Company Secretary
	Elan Science Three Limited