HENDERSON, Nev.--(BUSINESS WIRE)--Spectrum Pharmaceuticals (NASDAQ:SPPI) today announced that it commenced on Friday, April 13, 2012 a cash tender offer to purchase all of the outstanding shares of common stock of Allos Therapeutics, Inc. (NASDAQ:ALTH). The tender offer is being made pursuant to an Offer to Purchase, dated April 13, 2012, and in connection with the previously announced Agreement and Plan of Merger, dated April 4, 2012.
