The transaction has been unanimously approved by the Boards of Directors of both companies. Additionally, Warburg Pincus, Allos’ largest shareholder and the owner of approximately 24% of Allos’ outstanding shares, along with the directors and certain officers of Allos, have entered into tender and voting agreements pursuant to which such stockholders have agreed to tender all of their Allos shares into the tender offer and vote their shares in favor of the transaction. The transaction is expected to close in the second quarter of 2012. Spectrum currently intends to finance the acquisition with a combination of cash on hand and a revolving credit line from Bank of America, N.A.

“This transaction represents an excellent strategic and cultural fit that leverages two strong brands in the hematology/oncology market today with potential for future growth,” commented Paul L. Berns, President and Chief Executive Officer of Allos Therapeutics. “Spectrum shares our commitment to patients and their healthcare providers, and we believe FOLOTYN will be a welcomed addition to its commercial product offering and diversified portfolio of development-stage drugs.”

RBC Capital Markets, LLC is acting as Spectrum’s exclusive financial advisor, and Kirkland & Ellis LLP and Stradling Yocca Carlson & Rauth, P.C. are acting as legal counsel to Spectrum Pharmaceuticals. J.P. Morgan Securities LLC is acting as Allos' financial advisor, and Latham & Watkins LLP is acting as legal counsel to Allos Therapeutics.

Conference Call

Thursday, April 5, 2012 @ 8:30 a.m. Eastern/5:30 a.m. Pacific
Domestic:             (877) 837-3910, Conference ID# 68595555
International: (973) 796-5077, Conference ID# 68595555

For interested individuals unable to join the call, a replay will be available from April 5, 2012 @ 11:30 a.m. ET/8:30 a.m. PT through April 19, 2012 until 11:59 p.m. ET/8:59 p.m. PT.
Domestic Replay Dial-In #:                       (855) 859-2056, Conference ID# 68595555
International Replay Dial-In #: (404) 537-3406, Conference ID# 68595555

This conference call will also be webcast. Listeners may access the webcast, which is available on the investor relations page of Spectrum Pharmaceuticals’ website:

About Spectrum Pharmaceuticals, Inc.

Spectrum Pharmaceuticals, a biotechnology company with a primary focus in oncology and hematology, currently markets two oncology drugs, FUSILEV ® and ZEVALIN ®. In addition, Spectrum has two drugs, apaziquone and belinostat, in late stage development. Spectrum also has a diversified pipeline of novel drug candidates. Spectrum’s strategy is comprised of acquiring, developing and commercializing a broad and diverse pipeline of late-stage clinical and commercial drug products. Spectrum has aggressive business development and commercial operation teams that support a robust drug development program encompassing clinical development, medical research, regulatory affairs, biostatistics and data management. Spectrum also leverages the expertise of its worldwide partners to assist in the execution of its strategy. For more information, please visit Spectrum’s website at

About Allos Therapeutics, Inc.

Allos Therapeutics is a biopharmaceutical company committed to the development and commercialization of innovative anti-cancer therapeutics. Allos is currently focused on the development and commercialization of FOLOTYN ® (pralatrexate injection), a folate analogue metabolic inhibitor. FOLOTYN is approved in the U.S. for the treatment of patients with relapsed or refractory peripheral T-cell lymphoma (PTCL). This indication is based on overall response rate. Clinical benefit such as improvement in progression free survival or overall survival has not been demonstrated. Allos is also developing FOLOTYN in other hematologic malignancies and solid tumors. Allos is headquartered in Westminster, Colorado. For more information, please visit Allos’ website at

About ZEVALIN ® and the ZEVALIN Therapeutic Regimen

ZEVALIN (ibritumomab tiuxetan) injection for intravenous use, is indicated for the treatment of patients with relapsed or refractory, low-grade or follicular B-cell non-Hodgkin's lymphoma (NHL). ZEVALIN is also indicated for the treatment of patients with previously untreated follicular non-Hodgkin’s Lymphoma who achieve a partial or complete response to first-line chemotherapy.

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