Exhibit 10.6

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT			1. CONTRACT ID CODE				PAGE OF PAGES
							1	2
2. AMENDMENT/MODIFICATION NO. P00022		3. EFFECTIVE DATE See Block 16C	4. REQUISITION/PURCHASE REQ. NO. OS302885			5. PROJECT NO. (If applicable)
6. ISSUED BY	CODE	ASPR-BARDA	7. ADMINISTERED BY (If other than Item 6)		CODE
ASPR-BARDA 200 Independence Ave., S.W. Room 640-G Washington DC 20201
8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)			(x)	9A. AMENDMENT OF SOLICITATION NO.
SIGA TECHNOLOGIES, INC. 1385150 Attn: Daniel Luckshire SIGA TECHNOLOGIES, INC.         31  E  6 31 E 62ND ST NEW YORK NY 100658014
				9B. DATED (SEE ITEM 11)
			x	10A. MODIFICATION OF CONTRACT/ORDER NO. HHSO100201100001C
CODE   1385150		FACILITY CODE		10B. DATED (SEE ITEM 13) 05/13/2011
11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS
☐         The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers              ☐ is extended.      ☐ is 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) 2022.1992022.25106			Net Increase:         $2,618,293.54
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.
X	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).
	C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:
	D. OTHER (Specify type of modification and authority)
E. IMPORTANT:    Contractor   ☒ is not.    ☐ is required to sign this document and return   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: 13-3864870
DUNS Number: 932651516
UEI: VJRNRTSL22K4
The purpose of this modification is to correct Mod 21 in the PRISM system and add funds. Mod 21 did not add funds it only de-obligated cancelling funds. All other terms and conditions remain unchanged. Discount Terms: HHS NET 14P Continued …
Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.
15A. NAME AND TITLE OF SIGNER (Type or print) Dennis E. Hruby, CSO & EVP			16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print) JONATHAN F. GONZALEZ
15B. CONTRACTOR/OFFEROR		15C. DATE SIGNED	16B. UNITED STATES OF AMERICA			16C. DATE SIGNED
/s/ Dennis E. Hruby		29 Sep 2022	/s/ Jonathan F. Gonzalez			29 Sep 2022
(Signature of person authorized to sign)			(Signature of Contracting Officer)
Previous edition unusable					STANDARD FORM 30 (REV. 11/2016)
					Prescribed by GSA FAR (48 CFR) 53.243

CONTINUATION SHEET	REFERENCE NO. OF DOCUMENT BEING CONTINUED HHSO100201100001C/P00022			PAGE OF
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NAME OF OFFEROR OR CONTRACTOR SIGA TECHNOLOGIES, INC. 1385150
ITEM NO (A)	SUPPLIES/SERVICES (B)	QUANTITY (C)	UNIT (D)	UNIT PRICE (E)	AMOUNT (F)
	Appr. Yr.: 2022 CAN: 1992022 Object Class: 25106 Period of Performance: 06/28/2016 to 12/31/2023 Add Item 8 as follows:
8	ASPR-22-02268 – Additional funding to SIGA Technologies to cover the cost for completing tasks remaining under Contract HHSO10020110001C Obligated Amount: $2,618,293.54				2,618,293.54
	PSC: 6505 NAICS: 541714 COR is Dr. Annie Xi Lu, (202) 604-5814, Xi.Lu@hhs.gov
NSN 7540-01-152-8067					OPTIONAL FORM 336 (4-86) Sponsored by GSA FAR (48 CFR) 53.110