A webcast of this presentation will be available both live and by replay, accessible from the Emergent website www.emergentbiosolutions.com under “Investors.”

About Emergent BioSolutions Inc.

Emergent BioSolutions, led by Chairman and CEO Fuad El-Hibri, protects and enhances life by developing and manufacturing vaccines and therapeutics that are supplied to healthcare providers and purchasers for use in preventing and treating disease. Emergent’s marketed and investigational products target infectious diseases, oncology and autoimmune disorders. Additional information about the company may be found at www.emergentbiosolutions.com.

SOURCE: Emergent BioSolutions Inc.

A webcast of this presentation will be available both live and by replay, accessible from the Emergent website www.emergentbiosolutions.com under “Investors”.

About Emergent BioSolutions Inc.

Emergent BioSolutions, led by Chairman and CEO Fuad El-Hibri, protects and enhances life by developing and manufacturing vaccines and therapeutics that are supplied to healthcare providers and purchasers for use in preventing and treating disease. Emergent’s marketed and investigational products target infectious diseases, oncology and autoimmune disorders. Additional information about the company may be found at www.emergentbiosolutions.com.

SOURCE: Emergent BioSolutions Inc.

For 1Q 2011, total revenues were $18.5 million as compared to $46.8 million in 2010. In addition, for 1Q 2011 the company recorded a net loss of $21.4 million, or $0.61 per basic share, as compared to net income of $2.5 million, or $0.08 per basic share, in 2010.

R. Don Elsey, chief financial officer of Emergent BioSolutions, stated, “While our first quarter revenues were slightly lower than expected, we remain on track to achieve our full year guidance of total revenues of $320 to $340 million and net income of $35 to $45 million.”

1Q 2011 Key Financial Results

Product Sales

For 1Q 2011, product sales were $5.6 million, a decrease of $33.3 million, or 86 percent, from $38.9 million for 1Q 2010. This decrease was primarily due to an 88 percent decrease in the number of doses of BioThrax delivered. During the first quarter, the company redeployed its potency testing capacity from BioThrax release testing to qualification of replacement reference standards and other development testing. This process, which is required to enable continued future release of BioThrax doses, has now been substantially completed. Product sales revenues for 1Q 2011 consisted of BioThrax sales to CDC of $5.0 million and aggregate international and other sales of $0.6 million.

Contracts and Grants Revenues

For 1Q 2011, contracts and grants revenues were $12.9 million, an increase of $5.0 million, or 63 percent, from $7.9 million for 1Q 2010. The increase was primarily due to revenues from the recently awarded contract from BARDA for large-scale manufacturing for BioThrax, collaborations with Abbott and Pfizer, along with increased activity and associated revenue from development contracts with BARDA and NIAID.

Cost of Product Sales

For 1Q 2011, cost of product sales was $1.1 million, a decrease of $6.4 million, or 86 percent, from $7.5 million for 1Q 2010. This decrease was primarily attributable to the 88 percent decrease in the number of BioThrax doses sold.

Research and Development

For 1Q 2011, research and development expenses were $34.8 million, an increase of $14.8 million, or 74 percent, from $19.9 million for 1Q 2010. This increase primarily reflects higher contract service and personnel costs, and includes increased expenses of $13.9 million on product candidates and technology platform development activities associated with the BioSciences segment and increased expenses of $0.9 million on product candidates associated with the BioDefense segment. Net of development contracts and grants reimbursement revenue along with the net loss attributable to noncontrolling interests, research and development expenses were $20.0 million for 1Q 2011.

Selling, General and Administrative

For 1Q 2011, selling, general and administrative expenses were $18.2 million, an increase of $2.0 million, or 12 percent, from $16.2 million for 1Q 2010. This increase is primarily due to increased personnel-related expenses and professional services to support the business. Selling, general and administrative expenses for 1Q 2011 consisted of $14.0 million associated with the BioDefense segment and $4.2 million associated with the BioSciences segment.

Financial Condition and Liquidity

Cash and cash equivalents combined with investments at March 31, 2011 was $143.3 million compared to $171.0 million at December 31, 2010. Additionally, at March 31, 2011, the accounts receivable balance was $12.0 million, which is comprised primarily of unpaid amounts under our NIAID and BARDA development contracts.

2Q 2011 Revenue Forecast

For the second quarter of 2011, the company anticipates total revenues of $80 to $90 million.

2011 Forecast

For full year 2011, the company is reaffirming its financial forecast of total revenues of $320 to $340 million and net income of $35 to $45 million.

2011 total revenue is expected to be driven by, among other things:

• the continuation of deliveries of BioThrax under the current multi-year procurement contract with CDC, which was recently modified to increase the total contracted doses to 17.9 million;
• additional deliveries of BioThrax under a follow-on, multi-year procurement contract with CDC, anticipated to begin in 4Q 2011;
• a significant increase in contracts and grants revenue based primarily on development contracts related to product development programs in the company’s BioDefense segment; and
• collaboration and milestone revenues associated with achievement of clinical development milestones related to the company’s oncology product candidate, which is under an existing co-development agreement with Abbott, and the company’s autoimmune product candidate, which is being developed by Pfizer under a license agreement from the company.

Conference Call and Webcast

Company management hosted a conference call at 5:00 pm Eastern on May 5, 2011 to discuss the financial results for the first quarter of 2011, recent business developments, revenue guidance for the second quarter of 2011 and revenue and net income guidance for the full year 2011.

A replay of the conference call will be accessible by dialing 888/286-8010 or 617/801-6888 and using the passcode 12159691. The replay will be available through May 19, 2011. The webcast will be archived on the company’s website, www.emergentbiosolutions.com, under “Investors”.

About Emergent BioSolutions Inc.

Emergent BioSolutions, led by Chairman and CEO, Fuad El-Hibri, protects and enhances life by developing and manufacturing vaccines and therapeutics that are supplied to healthcare providers and purchasers for use in preventing and treating disease. Emergent’s marketed and investigational products target infectious diseases, oncology and autoimmune disorders. Additional information may be found at www.emergentbiosolutions.com.

Safe Harbor Statement

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Any statements other than statements of historical fact, including statements regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects, plans and objectives of management, including any potential future securities offering, our estimates of preliminary results for 2010, and our expected revenue growth and net earnings for 2011, and any other statements containing the words “believes”, “expects”, “anticipates”, “plans”, “estimates” and similar expressions, are forward-looking statements. There are a number of important factors that could cause the company’s actual results to differ materially from those indicated by such forward-looking statements, including appropriations for BioThrax^(R) procurement; our ability to obtain new BioThrax^(R) sales contracts or modifications to existing contracts; our plans to pursue label expansions and improvements for BioThrax^(R); our ability to perform under our current development contracts with the U.S. government; our plans to expand our manufacturing facilities and capabilities; the rate and degree of market acceptance of our products and product candidates; the success of preclinical studies and clinical trials of our product candidates and post-approval clinical utility of our products; the potential benefits of our existing collaborations and our ability to selectively enter into additional collaborative arrangements; ongoing and planned development programs, preclinical studies and clinical trials; and other factors identified in the company’s Annual Report on Form 10-K for the year ended December 31, 2010 and subsequent reports filed with the SEC. The company disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this press release.

Emergent BioSolutions Inc. (NYSE: EBS) announced on 10 March its financial results for the full year ending December 31, 2010.

Total revenues for 2010 were $286.2 million as compared to $234.8 million in 2009, and net income was $51.7 million, or $1.63 per basic share, as compared to $31.1 million, or $1.02 per basic share, in 2009.

For the fourth quarter 2010, total revenues were $103.2 million as compared to $53.8 million in 2009, and net income was $26.2 million, or $0.78 per basic share, as compared to $4.2 million, or $0.14 per basic share, in 2009.

R. Don Elsey, chief financial officer of Emergent BioSolutions, stated, "Our 2010 financial performance reflects our continued success in growing revenue from the sale of BioThrax(R) and government development contracts, as well as from development collaborations with our large pharma partners. We achieved this revenue growth while closely managing our overall expenditures even as we continued to advance our pipeline of vaccines and therapeutics targeting key disease areas. We expect to continue our growth in 2011, as evidenced by our reaffirmed 2011 forecast of total revenues of $320 to $340 million and net income of $35 to $45 million."

2010 Key Operational Accomplishments

• Acquired Trubion Pharmaceuticals, Inc. for a total consideration of up to $131.6 million, including $92.9 million in upfront cash and stock and up to $38.7 million of success-based milestones, payable between October 2010 and October 2013;
• Secured a BARDA development contract, valued at up to $107.0 million, to fund qualification, validation and licensure of Building 55 in order to manufacture BioThrax(R) (Anthrax Vaccine Adsorbed) at large-scale;
• Secured a BARDA development contract, valued at up to $186.6 million, to fund development of our rPA vaccine candidate PreviThraxTM (Recombinant Protective Antigen Anthrax Vaccine, Purified);
• Secured a NIAID development contract, valued at up to $28.7 million, to fund further development of NuThraxTM (Anthrax Vaccine Adsorbed with CPG 7909 Adjuvant), the second contract award for this vaccine candidate;
• Launched Singapore operations and formed EPIC Bio, Pte. Ltd., a joint venture with Temasek Life Sciences Ventures Pte. Ltd., to develop, manufacture, and commercialize pre-pandemic influenza vaccines and therapeutics;
• Obtained Fast Track designation and Orphan Drug status from FDA for ThravixaTM (Fully Human Anthrax Monoclonal Antibody);
• Initiated a Phase 1 clinical study for Thravixa;
• Initiated a Phase 1 clinical study for NuThrax; and

Expanded the Board of Directors with the appointment of John E. Niederhuber, M.D., former Director, The National Cancer Institute (NCI), and Marvin White, Chief Financial Officer, St. Vincent Health and former Chief Financial Officer, LillyUSA.

About Emergent BioSolutions Inc.

Emergent BioSolutions, led by Chairman and CEOFuad El-Hibri, protects and enhances life by developing and manufacturing vaccines and therapeutics that are supplied to healthcare providers and purchasers for use in preventing and treating disease. Emergent’s marketed and investigational products target infectious diseases, oncology and autoimmune disorders. Additional information may be found at http://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F%2Fwww.emergentbiosolutions.com&esheet=6643305&lan=en-US&anchor=www.emergentbiosolutions.com&index=3&md5=974c9d419f86092b960b6d8622d54f18.

Safe Harbor Statement

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Any statements other than statements of historical fact, including statements regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects, plans and objectives of management, including any potential future securities offering, our estimates of preliminary results for 2010, and our expected revenue growth and net earnings for 2011, and any other statements containing the words "believes", "expects", "anticipates", "plans", "estimates" and similar expressions, are forward-looking statements. There are a number of important factors that could cause the company’s actual results to differ materially from those indicated by such forward-looking statements, including appropriations for BioThrax(R) procurement; our ability to obtain new BioThrax(R) sales contracts or modifications to existing contracts; our plans to pursue label expansions and improvements for BioThrax(R); our ability to perform under our current development contracts with the U.S. government; our plans to expand our manufacturing facilities and capabilities; the rate and degree of market acceptance of our products and product candidates; the success of preclinical studies and clinical trials of our product candidates and post-approval clinical utility of our products; the potential benefits of our existing collaborations and our ability to selectively enter into additional collaborative arrangements; ongoing and planned development programs, preclinical studies and clinical trials; and other factors identified in the company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010 and subsequent reports filed with the SEC. The company disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this press release.

“Emergent’s acquisition of Trubion helps achieve our goal of diversifying beyond infectious diseases and marks an important step towards being a fully integrated biopharmaceutical company,” said Fuad El-Hibri, chairman and chief executive officer of Emergent BioSolutions. “We look forward to growing our presence in the state’s vibrant biotech community building on the strengths of the Emergent Seattle team in the field of biotherapeutics.”

Emergent will maintain research facilities in Seattle, Washington and the location will become a therapeutics-focused product development site.

NHM’s on-site museum, called The Experience Museum, is expected to be located at Atlanta Centennial Olympic Park. The facility will consist of self-guided multi-dimensional immersive presentations of life, health, and the human body, designed by BRC Imagination Arts. Renowned architect Moshe Safdie is designing the facility.

• The Jefferies & Company 2010 Global Life Sciences Conference
  New York, NY.
  June 8, 2010
  Corporate Overview Presentation
  11:00 AM Eastern
  There will be a full webcast with slides that will include discussion of the Company’s business activities, financial outlook and current news.

• The Needham & Company 9^th Annual Healthcare Conference
  New York, NY.
  June 10, 2010
  Corporate Overview Presentation
  3:20 PM Eastern
  There will be a full webcast with slides that will include discussion of the Company’s business activities, financial outlook and current news.

Both webcasts will be accessible from the Emergent website www.emergentbiosolutions.com under “Investors”.