Modification No. 27, effective March 31, 2022, to the Solicitation/Contract/Order for Commercial Items (the CDC BioThrax Procurement Contract), effective December 8, 2016, from the Centers for Disease Control and Prevention to Emergent Biodefense Operations Lansing LLC

Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1 1 8. NAME AND ADDRESS OF CONTRACTOR (No., street , cou nty, State and ZIP Code) 9A. AMENDMENT OF SOLICITATION NO. EMERGENT BIODEFENSE OPERATIONS LANSING LLC 330303 Attn: DIANA I ORORBIA-KNAPTON 10A. MODIFICATION OF CONTRACT/ORDER NO. 12/08/2016 2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASEREQ. NO. 5. PROJECT NO. (If applicable) P00027 6. ISSUED BY CODE 04/01/2022 ASPR/SNS 7. ADMINISTERED BY (ff other than Item 6) CODE ASPR/SNS ASPR/SNS ASPR/SNS US DEPT OF HEALTH & HUMAN ASPR/SNS SERVICES 2945 FLOWERS ROAD 2945 FLOWERS ROAD ATLANTA, GA 30341 ATLANTA, GA 30341 11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS D The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers Dis extended. Dis not extended. Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing Items 8 and 15, and returning copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified. 12. ACCOUNTING AND APPROPRIATION DATA (If required) See Schedule 13, THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS , IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14. CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO. IN ITEM 10A. B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b) . X C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF: FAR 52.212-4(c) Changes D. OTHER (Specify type of modification and authority) E. IMPORTANT : Contractor Dis not is required to sign this document and return 1 copies to the issuing office. 14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.) Tax ID Number: [**] DUNS Number: [**] This modification extends the Period of Performance for this contract by 90 days through 06/30/2022 to allow for the processing of additional orders from the Department of Defense (DoD). Period of Performance: 10/01/2021 to 06/30/2022 Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect. 15A. NAME AND TITLE OF SIGNER (Type or print) Edward DiNapoli Sr. Dir. Contract Operations and Insights 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print) Caleb Owen 158. CONTRACTOR/OFFEROR /s/ Edward DiNapoli (Sig nature of person authorized to sign) 15C. DATE SIGNED 168. UNITED STATES OF AMERICA /s/ Caleb W. Owen (Signature of Contracting Officer) 16C. DATE SIGNED Mar 31, 2022 03/31/2022 Previous edition unusable STANDARD FORM 30 (REV. 11/2016) Prescribed by GSA FAR (48 CFR) 53.243