Emergent BioSolutions enters agreement to acquire Trubion Pharmaceuticals

Emergent BioSolutions Inc. (NYSE: EBS) announced today it has entered into a definitive agreement to acquire Trubion Pharmaceuticals, Inc. (Nasdaq: TRBN) for upfront consideration of $96.8 million of value and up to $38.7 million of success-based milestones, resulting in a total consideration of up to $135.5 million. The acquisition will diversify Emergent's product development pipeline with the addition of Trubion's two clinical-stage product candidates focused on the targeted disease areas of oncology and autoimmunity. The acquisition also offers novel platforms, consisting of proprietary Small Modular Immunopharmaceutic (SMIP^TM) and SCORPION^TM technologies, for developing additional innovative therapeutic candidates.

The acquisition of Trubion is expected to further Emergent's position as a leading, fully integrated biopharmaceutical company focused on the manufacture, development and commercialization of vaccines and antibody therapeutics. Trubion's clinical and preclinical stage programs, as well as its leading edge science, will expand Emergent's product development pipeline and significantly broaden its antibody-based capabilities. Upon closing, the transaction is expected to provide approximately $20 million in cash, net of customary closing costs, and $70 million of net operating losses (NOLs) that are expected to be used over the next ten years.

Trubion's development pipeline is comprised of two clinical-stage therapeutic candidates and multiple preclinical programs, including:

• a clinical-stage CD20 directed SMIP candidate (SBI-087) for the treatment of Rheumatoid Arthritis (Phase 2) and Systemic Lupus Erythematosus (Phase 1/2) in partnership with Pfizer;
• a clinical-stage CD37 targeted SMIP candidate (TRU-016) for the treatment of Chronic Lymphocytic Leukemia (Phase 1/2), Non-Hodgkin's Lymphoma (Preclinical/Phase 1) in partnership with Abbott; and
• promising preclinical candidates based on the novel, proprietary SMIP and SCORPION platforms for the treatment of selected oncology and autoimmune diseases.

Fuad El-Hibri, chairman of the board of directors and chief executive officer of Emergent BioSolutions, stated, "This acquisition strengthens Emergent's biologics capabilities in two key aspects. First, it diversifies our product pipeline beyond infectious diseases into the two high growth areas of oncology and autoimmunity. And, second, it broadens our monoclonal antibody therapeutic capabilities. Emergent's stable vaccine franchise, substantial capital resources, and expertise in manufacturing and product development combined with Trubion's world-class therapeutic platform technologies and clinical-stage development programs should translate into significant value over the near and long term."

Steven Gillis, Ph.D., executive chairman of the board of directors and acting president of Trubion, stated, "The acquisition of Trubion by Emergent should accelerate the continued development of our leading products and technologies. We believe the combination of Emergent's strong financial position and expertise in development of biologics with Trubion's innovative SMIP and SCORPION protein therapeutic product candidates and technologies will provide an efficient and effective development path for these promising products and technologies."

Emergent will maintain research facilities in Seattle, Washington upon completion of the acquisition, and the location will become a therapeutics-focused product development site for the combined company. Taking this transaction into account, Emergent is reaffirming its annual 2010 forecast of $275 to $300 million in total revenues and $40 to $50 million in net income.

Terms of the Agreement

The transaction has been approved by the Boards of Directors of both companies and is subject to customary closing conditions, including the approval of the acquisition by stockholders of Trubion Pharmaceuticals and the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976.

Under the terms of the agreement, each share of Trubion Pharmaceuticals common stock will be converted into the right to receive an upfront payment of $1.365 per share in cash and 0.1641 shares of Emergent BioSolutions common stock. The upfront payment represents a value of $4.55 per share, or approximately $96.8 million, based on Trubion's total common shares outstanding, the net value of dilutive stock options, and the trading average of Emergent BioSolutions common stock for the five days prior to the signing of the definitive agreement. In the aggregate, Emergent will issue approximately 3,350,000 shares of its common stock as part of the upfront consideration, which after the closing of the merger will represent approximately 9.2% of Emergent's total shares outstanding. Certain of these shares will be subject to lockup provisions. Trubion Pharmaceuticals stockholders will also receive one Contingent Value Right (CVR) per share, which will entitle the holders to receive cash payments based upon achievement of five predefined Phase 2 and Phase 3 clinical study initiation milestones and one manufacturing-related milestone. The total potential aggregate value of the CVRs is $38.7 million over a 36-month period following the closing of the merger.

The acquisition of Trubion is expected to close in the fourth quarter of 2010.

SOURCE Emergent BioSolutions Inc.