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Emergent BioSolutions Awarded Contract Modification Valued at Approximately $24 Million for CYFENDUS® (Anthrax Vaccine Adsorbed, Adjuvanted)

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Emergent BioSolutions (NYSE:EBS) announced a contract modification valued at approximately $24 million from BARDA, part of ASPR within HHS, to supply CYFENDUS® (Anthrax Vaccine Adsorbed, Adjuvanted) for U.S. anthrax preparedness efforts. CYFENDUS® received FDA approval in July 2023 as a two-dose post‑exposure prophylaxis anthrax vaccine for adults 18–65 when used with recommended antibacterial drugs. The company highlighted a recent NEJM Evidence study examining CYFENDUS® use after anthrax exposures in Wyoming. Emergent said this award builds on its long-standing U.S. government partnership, noting an earlier 2026 delivery order valued at up to $21.5 million to supply BioThrax® (Anthrax Vaccine Adsorbed) to the U.S. Department of War.

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Positive

  • BARDA contract modification valued at approximately $24 million to supply CYFENDUS® for U.S. anthrax preparedness
  • Earlier 2026 delivery order valued at up to $21.5 million to supply BioThrax® to the U.S. Department of War

Negative

  • None.

News Explained

The approximately $24 million CYFENDUS contract modification is newly executed, making Emergent’s government supply agreement—and its commitment to provide the vaccine—the material new state disclosed here.

Market Context

Insider context recorded Net Selling over the analyzed period, based on one reported transaction. Th...
Analysis

Insider context recorded Net Selling over the analyzed period, based on one reported transaction. That provides governance context alongside the award; investors can watch subsequent contract execution and the vaccine’s stated safety limitations.

Key Figures

Contract Modification: $24 million FDA Approval: July 2023 Dosing: Two doses +3 more
6 metrics
Contract Modification $24 million CYFENDUS supply from BARDA
FDA Approval July 2023 CYFENDUS approval
Dosing Two doses CYFENDUS anthrax vaccine
Indicated Age Range 18 through 65 years CYFENDUS post-exposure prophylaxis
Earlier Delivery Order Up to $21.5 million BioThrax supply announced earlier in 2026
Common Adverse Reactions ≥10% Reported CYFENDUS injection-site reactions

Historical Context

5 past events · Latest: Aug 31 (Positive)
Pattern 5 events
Date Event Sentiment 24h Move Catalyst
Aug 31 Government supply award Positive +3.0% Canada standing offer expanded access to NARCAN nasal spray through 2029.
Aug 31 Overdose preparedness update Neutral +3.0% Company highlighted overdose education and naloxone access initiatives across the United States and Canada.
Aug 05 Second-quarter earnings Negative -29.6% GAAP loss, impairment charge, restructuring, and reduced full-year guidance accompanied the earnings release.
Aug 05 Biological threat collaboration Neutral -29.6% Release discussed biological threat preparedness, government partnerships, and CYFENDUS post-exposure use.
Jul 22 Earnings date announcement Neutral -1.1% Company scheduled its second-quarter 2026 financial results conference call for August 5.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Pattern Detected

Recent government and preparedness announcements were associated with positive recorded reactions, while the Q2 earnings event was associated with a sharply negative reaction.

Key Terms

post-exposure prophylaxis, anaphylaxis, Bacillus anthracis, inhalational anthrax
4 terms
post-exposure prophylaxis medical
"to supply CYFENDUS® (Anthrax Vaccine Adsorbed, Adjuvanted) for anthrax preparedness efforts."
A short course of medication or treatment given immediately after someone may have been exposed to an infectious agent to stop the infection from taking hold. Like applying a firewall after a suspected hacking attempt, it’s intended to prevent a small risk from becoming a full-blown problem. For investors, post-exposure prophylaxis matters because demand can spike suddenly after exposure events, regulatory approvals and efficacy data drive sales and valuation, and timely access or shortages affect market opportunity and reputational risk for healthcare providers and drug makers.
anaphylaxis medical
"following a previous dose of CYFENDUS®, BioThrax® or any component of the vaccine."
Anaphylaxis is a sudden, severe allergic reaction in which the body's defense system overreacts to a trigger (like a drug, food, or insect sting), causing widespread symptoms such as difficulty breathing, low blood pressure, and shock; it can be life‑threatening without prompt treatment. Investors care because anaphylaxis risks can affect a drug or product's safety profile, regulatory approval, liability exposure and market acceptance—similar to a sprinkler system going off and damaging the whole house rather than just one room.
Bacillus anthracis medical
"following suspected or confirmed exposure to Bacillus anthracis in persons 18 through 65 years"
A bacterium that causes anthrax, capable of infecting humans and animals through spores that can survive in soil for long periods; think of it like a tiny, hardy seed that can lie dormant and later grow into a dangerous infection. It matters to investors because outbreaks, biodefense concerns, vaccine and drug development, regulatory controls, and related supply-chain or insurance impacts can affect the valuation and risk profile of companies in healthcare, agriculture, and security sectors.
inhalational anthrax medical
"studies in animal models of inhalational anthrax."
Inhalational anthrax is a severe lung infection caused when tiny, hardy spores of the anthrax bacterium are breathed into the airways and germinate, releasing toxins that can rapidly damage the lungs and spread through the body. It matters to investors because outbreaks or credible threats can trigger urgent demand for vaccines, antibiotics, diagnostics and government spending, quickly affecting the value of companies in biodefense, pharmaceuticals and public‑health supplies—similar to how a factory fire can suddenly boost firms that sell firefighting equipment.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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GAITHERSBURG, Md., Sept. 01, 2026 (GLOBE NEWSWIRE) -- Emergent BioSolutions Inc. (NYSE: EBS) today announced a contract modification valued at approximately $24 million from the Biomedical Advanced Research and Development Authority (BARDA), part of the Administration for Strategic Preparedness and Response (ASPR) within the U.S. Department of Health and Human Services (HHS), to supply CYFENDUS® (Anthrax Vaccine Adsorbed, Adjuvanted) for anthrax preparedness efforts. Anthrax remains a significant global biological threat due to its potential use in a bioterrorism event and its implications for public health and national security.

“This newly executed CYFENDUS® contract modification with the U.S. government highlights the continued importance of maintaining readiness against anthrax threats,” said Paul Williams, senior vice president, head of products business, global government & public affairs at Emergent. “Emergent remains committed to ensuring access to CYFENDUS® and strengthening preparedness through reliable domestic manufacturing and supply.”

CYFENDUS® was approved by the U.S. Food and Drug Administration in July 2023 as a two-dose anthrax vaccine for post-exposure prophylaxis use in individuals 18 through 65 years of age when given with recommended antibacterial drugs. A recent NEJM Evidence study by Tillman et al. examines the use of the CYFENDUS® vaccine for post-exposure prophylaxis following anthrax exposures in Wyoming, further reinforcing the importance of maintaining preparedness capabilities and access to effective medical countermeasures against this high-consequence biological threat.1

This award builds on Emergent’s work with the U.S. government to support anthrax preparedness. Earlier this year, Emergent announced a delivery order valued at up to $21.5 million to supply BioThrax® (Anthrax Vaccine Adsorbed) to the U.S. Department of War.

This project has been funded in whole or in part with federal funds from the U.S. Department of Health and Human Services, Administration for Strategic Preparedness and Response, Biomedical Advanced Research and Development Authority, under Contract No. HHSO100201600030C.

About CYFENDUS® (Anthrax Vaccine Adsorbed, Adjuvanted)

Indication

CYFENDUS® (Anthrax Vaccine Absorbed, Adjuvanted) is a vaccine indicated for post-exposure prophylaxis of anthrax disease following suspected or confirmed exposure to Bacillus anthracis in persons 18 through 65 years of age when given with recommended antibacterial drugs. The efficacy of CYFENDUS® vaccine for post-exposure prophylaxis (PEP) is based solely on studies in animal models of inhalational anthrax.

Important Safety Information

Contraindication: Do not administer CYFENDUS® to individuals with a history of a severe allergic reaction (e.g., anaphylaxis) following a previous dose of CYFENDUS®, BioThrax® (a licensed anthrax vaccine with the same active ingredient as CYFENDUS®) or any component of the vaccine.

Warnings and Precautions: Management of Acute Allergic Reactions: Appropriate medical treatment must be available to manage possible anaphylactic reactions following administration of CYFENDUS®Pregnancy: CYFENDUS® can cause fetal harm when administered to a pregnant individual. In an observational study, there were more birth defects in infants born to individuals vaccinated with BioThrax® (a licensed anthrax vaccine with the same active ingredient as CYFENDUS®) in the first trimester compared to infants born to individuals vaccinated post pregnancy or individuals never vaccinated with BioThrax®.

Adverse Reactions: The most common (≥10%) injection-site adverse reactions reported were tenderness, pain, arm motion limitation, warmth, induration, itching, swelling, and erythema/redness. The most common systemic adverse reactions were muscle aches, tiredness, and headache.

To report Suspected Adverse Reactions, contact Emergent BioSolutions at 1-800-768-2304 or medicalinformation@ebsi.com; or VAERS at 1-800-822-7967 or www.vaers.hhs.gov.

Please see the Prescribing Information for CYFENDUS® for full safety information.

About BioThrax® (Anthrax Vaccine Adsorbed) 
BioThrax® vaccine is indicated for the active immunization for the prevention of disease caused by Bacillus anthracis in persons 18 through 65 years of age. BioThrax® is approved for (1) pre-exposure prophylaxis of disease in persons at high risk of exposure; and (2) post-exposure prophylaxis of disease following suspected or confirmed Bacillus anthracis exposure, when administered in conjunction with recommended antibacterial drugs. The efficacy of BioThrax® for post-exposure prophylaxis is based solely on studies in animal models of inhalational anthrax. 

Select Important Safety Information 

Contraindication: Severe allergic reaction (e.g., anaphylaxis) after a previous dose of BioThrax® or a component of the vaccine. Warnings and Precautions: Latex: The stopper of the vial contains natural rubber latex and may cause allergic reactions in latex sensitive individuals. Pregnancy: Avoid use in pregnancy unless the potential benefit outweighs the potential risk to the fetus. Adverse Reactions: The most common (>10%) local (injection-site) adverse reactions observed in clinical studies were tenderness, pain, erythema, edema, and arm motion limitation. The most common (≥5%) systemic adverse reactions were muscle aches, fatigue, and headache. 

Please see the full Prescribing Information for BioThrax® for additional safety information. 

About Emergent BioSolutions 
At Emergent, our mission is to protect and save lives. For over 25 years, we’ve been at work preparing those entrusted with protecting public health. We deliver protective and life-saving solutions for health threats like smallpox, mpox, botulism, Ebola, anthrax and opioid overdose emergencies. To learn more about how we help prepare communities around the world for today’s health challenges and tomorrow’s threats, visit our website and follow us on LinkedInXInstagramApple Podcasts and Spotify

Safe Harbor Statement
This press release 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 the expected timing for delivery of the CYFENDUS® vaccine and Emergent’s ability to increase inventories of CYFENDUS® vaccine to meet requested levels within specified time frames, are forward-looking statements. We generally identify forward-looking statements by using words like “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “plan,” “should,” “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 if known 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 statement. Any forward-looking statement speaks only as of the date of this press release, and, except as required by law, we do not undertake to update any forward-looking statement to reflect new information, events, or circumstances. Readers should consider this cautionary statement, as well as the risk factors identified in our periodic reports filed with the U.S. Securities and Exchange Commission, when evaluating our forward-looking statements.

Investor Contact:
Richard S. Lindahl
Executive Vice President, CFO
lindahlr@ebsi.com

Media Contact:
Assal Hellmer
Vice President, Communications
mediarelations@ebsi.com

1Tillman, C., Waranius, B. N., Van Houten, C., & Harrist, A. (2026). Cyfendus for Postexposure Prophylaxis after Inhalation Anthrax Exposures in Wyoming. NEJM Evidence, 5(7), EVIDpha2600122. doi.org.


FAQ

What did Emergent BioSolutions (NYSE:EBS) announce on September 1, 2026, regarding CYFENDUS anthrax vaccine?

Emergent BioSolutions announced a BARDA contract modification worth about $24 million to supply CYFENDUS® for U.S. anthrax preparedness. According to Emergent, the award supports post‑exposure prophylaxis capabilities against anthrax and reinforces the company’s role in national health security partnerships with federal agencies.

How much is the BARDA contract modification for CYFENDUS worth to Emergent BioSolutions (EBS)?

The BARDA contract modification is valued at approximately $24 million for CYFENDUS® supply. According to Emergent, these funds support anthrax preparedness efforts under Contract No. HHSO100201600030C and extend its existing relationship with ASPR’s Biomedical Advanced Research and Development Authority within the U.S. Department of Health and Human Services.

What is CYFENDUS anthrax vaccine and who is it indicated for, according to Emergent BioSolutions (NYSE:EBS)?

CYFENDUS® (Anthrax Vaccine Adsorbed, Adjuvanted) is indicated for post‑exposure prophylaxis of anthrax in adults 18–65. According to Emergent, it is used after suspected or confirmed Bacillus anthracis exposure and must be given with recommended antibacterial drugs, with efficacy based solely on inhalational anthrax animal studies.

What other 2026 U.S. government anthrax vaccine order did Emergent BioSolutions (EBS) report besides CYFENDUS?

Earlier in 2026, Emergent reported a delivery order worth up to $21.5 million to supply BioThrax® to the U.S. Department of War. According to Emergent, this BioThrax® order, together with the CYFENDUS® modification, supports broader U.S. anthrax preparedness and immunization strategies.

What are the key safety warnings for CYFENDUS anthrax vaccine mentioned by Emergent BioSolutions (NYSE:EBS)?

CYFENDUS® should not be given to individuals with severe allergic reactions to CYFENDUS®, BioThrax®, or vaccine components. According to Emergent, it can cause fetal harm in pregnancy, and common reactions include injection‑site tenderness, pain, swelling, and systemic effects like muscle aches, tiredness, and headache.

How do CYFENDUS and BioThrax differ in indications within Emergent BioSolutions’ (EBS) anthrax vaccine portfolio?

CYFENDUS® is indicated for post‑exposure prophylaxis when combined with antibacterial drugs in adults 18–65. According to Emergent, BioThrax® is indicated both for pre‑exposure prophylaxis in high‑risk individuals and post‑exposure prophylaxis, with post‑exposure efficacy for both vaccines based on animal inhalational anthrax studies.