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Emergent BioSolutions Receives U.S. FDA Approval for Drug Product Manufacturing of raxibacumab at its Winnipeg, Canada Site

Key Takeaway: Emergent BioSolutions announced that the U.S. FDA has approved its supplemental Biologics License Application for raxibacumab manufacturing at its facility in Winnipeg, Canada. This facility, with over 45 years of experience in therapeutic production, will now be a key site for raxibacumab, which is used for treating and preventing inhalational anthrax. The approval aligns with Emergent's broader transformation strategy aimed at consolidating manufacturing and enhancing operational efficiency. However, it's worth noting that raxibacumab's effectiveness has primarily been studied in animal models, and there are risks of hypersensitivity reactions associated with its use.

Market Sentiment Analysis

POSITIVE FACTORS

  • FDA approval for raxibacumab manufacturing marks a significant milestone for Emergent.
  • The Winnipeg facility has over 45 years of experience, enhancing production capabilities.
  • This approval supports Emergent's multi-year transformation strategy for growth.

CONCERNS & RISKS

  • The effectiveness of raxibacumab is solely based on animal studies, indicating limited evidence in humans.
  • There have been reported cases of hypersensitivity and anaphylaxis linked to the drug.

Full Press Release Details

GAITHERSBURG, Md., Dec. 12, 2025 (GLOBE NEWSWIRE) -- Emergent BioSolutions (NYSE: EBS) today announced that the U.S. Food and Drug Administration (FDA) has approved its supplemental Biologics License Application (sBLA) for its Winnipeg, Canada facility to be added as the drug product manufacturing and testing site for raxibacumab, a monoclonal antibody for the treatment and prophylaxis of inhalational anthrax.
“We are pleased with the U.S. FDA approval of our sBLA for raxibacumab manufacturing at Emergent’s USMCA-compliant site in Winnipeg,” Joe Papa, president and CEO, Emergent. “This regulatory action further supports the advancement of our multi-year transformation strategy by building a flexible, streamlined and customer-focused manufacturing network. We will continue to take actions that progress our key turnaround priorities toward driving long-term and sustainable growth.”
This approval follows Emergent’s May 2024 announcement of a new operational plan to consolidate its manufacturing sites and concentrate operations in Winnipeg, Canada and Lansing, Michigan as part of its multi-year turnaround and transformation strategy. Emergent’s Winnipeg facility has over 45 years of experience developing and manufacturing preclinical to commercial therapeutics. Through this facility, Emergent maintains drug substance, fill/finish, and analytical testing capabilities to support the manufacturing of its medical countermeasures portfolio, as well as capacity for strategic manufacturing partnerships.
Indication and Select Important Safety Information for raxibacumab Injection
raxibacumab is indicated for the treatment of adult and pediatric patients with inhalational anthrax due to Bacillus anthracis in combination with appropriate antibacterial drugs, and for prophylaxis of inhalational anthrax when alternative therapies are not available or are not appropriate.
Limitations of Use: The effectiveness of raxibacumab is based solely on efficacy studies in animal models of inhalational anthrax. There have been no studies of raxibacumab in the pediatric population; dosing in pediatric patients was derived using an extrapolation approach.
Important Safety Information
Warning: Hypersensitivity and Anaphylaxis
Hypersensitivity reactions, including anaphylaxis, have been reported during or after the administration of raxibacumab by intravenous infusion. Administer raxibacumab by intravenous infusion in monitored settings where appropriate equipment, medication (including epinephrine), and personnel trained in the management of hypersensitivity, anaphylaxis, and shock are available.
Adverse Reactions: Common adverse reactions in healthy adult subjects (≥1.5%) were injection site reaction, erythema and pain, headache, rash, pain in extremity, pruritus, and somnolence.
To report Suspected Adverse Reactions, contact Emergent BioSolutions at 1-800-768-2304 or medicalinformation@ebsi.com; or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
Please see the full Prescribing Information for raxibacumab for additional safety information.
About Emergent BioSolutions
Safe Harbor Statement
This communication includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical fact, including statements regarding raxibacumab manufacturing at our Winnipeg manufacturing site, capacity for strategic manufacturing partnerships, our multi-year transformation strategy, and actions to progress our key turnaround priorities are forward-looking statements. We generally identify forward-looking statements by using words like “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “future,” “goal,” “intend,” “may,” “plan,” “position,” “possible,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would,” and similar expressions or variations thereof, or the negative thereof, but these terms are not the exclusive means of identifying such statements. Forward-looking statements are based on our current intentions, beliefs and expectations regarding future events based on information that is currently available. We cannot guarantee that any forward-looking statement will be accurate. Readers should realize that if underlying assumptions prove inaccurate or unknown risks or uncertainties materialize, actual results could differ materially from our expectations. Readers are, therefore, cautioned not to place undue reliance on any forward-looking statements. Any forward-looking statement speaks only as of the date of this communication and, except as required by law, we do not undertake any obligation to update any forward-looking statement to reflect new information, events or circumstances.
There are a number of important factors that could cause our actual results to differ materially from those indicated by any forward-looking statements. Readers should consider this cautionary statement, as well as the risk factors and other disclosures included in our periodic reports filed with the Securities and Exchange Commission, when evaluating our forward-looking statements.
Executive Vice President, CFO, Emergent
Vice President, Communications, Emergent

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Frequently Asked Questions

What did the FDA approve for Emergent BioSolutions?

The FDA approved Emergent's sBLA for raxibacumab manufacturing in Winnipeg.

What is raxibacumab used for?

Raxibacumab is indicated for treating and preventing inhalational anthrax.

What are common side effects of raxibacumab?

Common side effects include injection site reactions, headaches, and erythema.

What should be available during raxibacumab infusion?

Monitored settings with emergency equipment and trained personnel are essential.

Where can adverse reactions be reported for raxibacumab?

Adverse reactions can be reported to Emergent or the FDA via specified contact methods.

Last updated: Dec 12, 2025