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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 TOq6kiuctJkNhXNAX2JOmUlXPVr8U6njLSRzPtyPnKkuP5/TaS9vTcHy7Y+3I8Yx
 Y2fRJApKemKp3fObtOGY1A==

<SEC-DOCUMENT>0001179022-04-000023.txt : 20040109
<SEC-HEADER>0001179022-04-000023.hdr.sgml : 20040109
<ACCEPTANCE-DATETIME>20040109114239
ACCESSION NUMBER:		0001179022-04-000023
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040108
FILED AS OF DATE:		20040109

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TRANSTECH PHARMA INC
		CENTRAL INDEX KEY:			0001087201

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23047
		FILM NUMBER:		04517006

	BUSINESS ADDRESS:	
		STREET 1:		7393 WOLF SPRING TRACE
		CITY:			LOUISVILLE
		STATE:			KY
		ZIP:			40241

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIGA TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0001010086
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				133864870
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		420 LEXINGTON AVE
		STREET 2:		SUITE 601
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10170
		BUSINESS PHONE:		2126729100

	MAIL ADDRESS:	
		STREET 1:		420 LEXINGTON AVE
		STREET 2:		SUITE 601
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10170

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SIGA PHARMACEUTICALS INC
		DATE OF NAME CHANGE:	19961108
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2004-01-08</periodOfReport>
    <issuer>
        <issuerCik>0001010086</issuerCik>
        <issuerName>SIGA TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>SIGA</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001087201</rptOwnerCik>
            <rptOwnerName>TRANSTECH PHARMA INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4170 MENDENHALL OAKS PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 110</rptOwnerStreet2>
            <rptOwnerCity>HIGH POINT</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>27265</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock, par value $0.0001 per share &quot;Common Stock&quot;)</value></securityTitle><transactionDate><value>2004-01-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>3472222</value><footnoteId id="F1"/><footnoteId id="F2"/></transactionShares><transactionPricePerShare><value>1.44</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>3472222</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value
>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><derivativeTable><derivativeTransaction><securityTitle><value>Warrant (right to buy)</value></securityTitle><conversionOrExercisePrice><value>2.00</value></conversionOrExercisePrice><transactionDate><value>2004-01-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>1736111</value><footnoteId id="F3"/></transactionShares><transactionPricePerShare><footnoteId id="F3"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-01-08</value></exerciseDate><expirationDate><value>2011-01-08</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></und
erlyingSecurityTitle><underlyingSecurityShares><value>1736111</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1736111</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>1.44</value></conversionOrExercisePrice><transactionDate><value>2004-01-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>3472222</value><footnoteId id="F4"/></transactionShares><transactionPricePerShare><footnoteId id="F4"/></transactionPricePerShare><transactionAcquiredDisposedCo
de><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-08-13</value></exerciseDate><expirationDate><value>2003-10-13</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>3472222</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><footnoteId id="F1"/></conversionOrExercisePrice><transactionDate><value>2004-01-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySw
apInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>1736111</value><footnoteId id="F5"/></transactionShares><transactionPricePerShare><footnoteId id="F5"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-08-13</value></exerciseDate><expirationDate><value>2003-10-13</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Warrant</value></underlyingSecurityTitle><underlyingSecurityShares><value>1736111</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">On August 13, 2003, MacAndrews &a
mp; Forbes Holdings Inc. (&quot;Holdings&quot;) and SIGA Technologies, Inc. (the &quot;Company&quot;) entered into a Securities Purchase Agreement (the &quot;Purchase Agreement&quot;).  Pursuant to the Purchase Agreement, Holdings acquired an option (the &quot;SIGA Option&quot;), exercisable from time to time, to purchase (a) up to 6,146,875 shares of Common Stock (&quot;Tranche B Shares&quot;) at a per share purchase price of $1.44 and (b) a warrant to purchase a number of shares of Common Stock equal to 50% of the number of Tranche B Shares, exercisable for $2.00 per share, for no additional consideration.  On October 8, 2003, in accordance with the Purchase Agreement, Holdings assigned a portion of the SIGA Option to the filing person, for no consideration.  The filing person and Holdings are each affiliated with Ronald Perelman.  Mr. Perelman disclaims benefical ownership of all securities reported on this Form 4, except to the extent of his pecuniary interest therein. </footnote><footnote id="F2"> On Oc
tober 8, 2003, the filing person exercised its portion of the SIGA Option, subject to the approval of the Company's stockholders pursuant to NASD Marketplace Rule 4350 (&quot;Rule 4350&quot;).  On January 8, 2004, the Company's stockholders approved the issuance of the securities in accordance with Rule 4350, and on January 8, 2004 the filing peron acquired the securities.</footnote><footnote id="F3">This warrant was received, for no additional consideration, along with the 3,472,222 Tranche B Shares issued to the filing person upon exercise of its portion of the SIGA Option.</footnote><footnote id="F4">As a result of the receipt of the 3,472,222 Tranche B Shares issued to the filing person upon exercise of its portion of the SIGA Option, the SIGA Option was reduced by a like amount.  The SIGA Option was acquired for no consideration.</footnote><footnote id="F5">As a result of the receipt of the warrant to purchase 1,736,111 shares of Common Stock issued to the filing person upon exercise of its portion of t
he SIGA Option, the SIGA Option was reduced by a like amount.  The SIGA Option was acquired for no consideration.</footnote></footnotes><remarks/><ownerSignature><signatureName>Adnan M. M. Mjalli</signatureName><signatureDate>2004-01-09</signatureDate></ownerSignature></ownershipDocument>

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