-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 WZAb8Fmwbag/LgY9JzxkcOqAUQJAEDBt4GFhWx5YyKW42GjdHqPvUCclMkQm+yFb
 HrrzWz8YZz9FuDV4NTNyFg==

<SEC-DOCUMENT>0001209191-03-025380.txt : 20031010
<SEC-HEADER>0001209191-03-025380.hdr.sgml : 20031010
<ACCEPTANCE-DATETIME>20031010171833
ACCESSION NUMBER:		0001209191-03-025380
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031008
FILED AS OF DATE:		20031010

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PERELMAN RONALD O
		CENTRAL INDEX KEY:			0001186472

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23047
		FILM NUMBER:		03937607

	MAIL ADDRESS:	
		STREET 1:		35 EAST 62ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10021

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MACANDREWS & FORBES HOLDINGS INC
		CENTRAL INDEX KEY:			0000740740
		STANDARD INDUSTRIAL CLASSIFICATION:	PERFUMES, COSMETICS & OTHER TOILET PREPARATIONS [2844]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23047
		FILM NUMBER:		03937609

	BUSINESS ADDRESS:	
		STREET 1:		36 EAST 63RD ST
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10021
		BUSINESS PHONE:		2126889000

	MAIL ADDRESS:	
		STREET 1:		MACANDREW & FORBES HOLDINGS INC
		STREET 2:		35 EAST 62ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MAFCO HOLDINGS INC
		CENTRAL INDEX KEY:			0000918939
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23047
		FILM NUMBER:		03937608

	BUSINESS ADDRESS:	
		STREET 1:		38 EAST 63RD STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10021
		BUSINESS PHONE:		2125728600

	MAIL ADDRESS:	
		STREET 1:		38 EAST 63RD STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10021
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-10-08</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001010086</issuerCik>
        <issuerName>SIGA TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>SIGA</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000918939</rptOwnerCik>
            <rptOwnerName>MAFCO HOLDINGS INC</rptOwnerName>
        </reportingOwnerId>
<reportingOwnerAddress><rptOwnerStreet1>35 East 62nd Street</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>New York</rptOwnerCity><rptOwnerState>NY</rptOwnerState><rptOwnerZipCode>10021</rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001186472</rptOwnerCik>
            <rptOwnerName>PERELMAN RONALD O</rptOwnerName>
        </reportingOwnerId>
<reportingOwnerAddress><rptOwnerStreet1>35 East 62nd Street</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>New York</rptOwnerCity><rptOwnerState>NY</rptOwnerState><rptOwnerZipCode>10021</rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000740740</rptOwnerCik>
            <rptOwnerName>MACANDREWS &amp; FORBES HOLDINGS INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>35 EAST 62ND STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10021</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</value><footnoteId id="F1" /></securityTitle><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>1396462</value><footnoteId id="F2" /></transactionShares><transactionPricePerShare><value>1.44</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2578374</value></sharesOwnedFollowingTransaction></postTransactionAmount
s><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through wholly-owned corporation</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><derivativeTable><derivativeTransaction><securityTitle><value>Warrant (right to buy)</value></securityTitle><conversionOrExercisePrice><value>2</value></conversionOrExercisePrice><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>698232</value><footnoteId id="F3" /></transactionShares><transactionPricePerShare><footnoteId id="F3" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transact
ionAmounts><exerciseDate><value>2003-10-14</value></exerciseDate><expirationDate><value>2010-10-14</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>698232</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1039725</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through wholly-owned corporation</value></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>1.44</value></conversionOrExercisePrice><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>
X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>1396462</value><footnoteId id="F4" /></transactionShares><transactionPricePerShare><footnoteId id="F4" /></transactionPricePerShare><transactionAcquiredDisposedCode><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>1396462</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>4750413</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through wholly-owned corporation</
value></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>1.44</value></conversionOrExercisePrice><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>G</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>3472222</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>Common Stock</value
></underlyingSecurityTitle><underlyingSecurityShares><value>3472222</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1278191</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through wholly-owned corporation</value></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>1.44</value></conversionOrExercisePrice><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>G</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>3472
222</value><footnoteId id="F5" /></transactionShares><transactionPricePerShare><footnoteId id="F5" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</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>3472222</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through partially-owned corporation</value></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><foot
noteId id="F2" /></conversionOrExercisePrice><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>698232</value><footnoteId id="F6" /></transactionShares><transactionPricePerShare><footnoteId id="F6" /></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>698232</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2375206
</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through wholly-owned corporation</value></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><footnoteId id="F2" /></conversionOrExercisePrice><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>G</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>1736111</value><footnoteId id="F5" /></transactionShares><transactionPricePerShare><footnoteId id="F5" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionA
cquiredDisposedCode></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>639095</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through wholly-owned corporation</value></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Option (right to buy)</value></securityTitle><conversionOrExercisePrice><footnoteId id="F2" /></conversionOrExercisePrice><transactionDate><value>2003-10-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transacti
onFormType><transactionCode>G</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>1736111</value><footnoteId id="F5" /></transactionShares><transactionPricePerShare><footnoteId id="F5" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</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>1736111</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Owned through par
tially-owned corporation</value></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Common Stock, par value $0.0001 per share ("Common Stock").</footnote><footnote id="F2">On August 13, 2003, MacAndrews &amp; Forbes Holdings Inc. ("Holdings"), a wholly owned subsidiary of Mafco Holdings Inc. and a joint filer hereunder, and SIGA Technologies, Inc. (the "Company") entered into a Securities Purchase Agreement (the "Purchase Agreement").  Pursuant to the Purchase Agreement, Holdings acquired an option (the "SIGA Option"), exercisable from time to time, to purchase (a) up to 6,146,875 shares of Common Stock ("Tranche B Shares") at a per share puchase 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, Holdings exercised a portion of the SIGA Option.</footnote><footnote id="F3">This warrant was re
ceived, for no additional consideration, along with the 1,396,462 Tranche B Shares issued to Holdings upon exercise of a portion of the SIGA Option.</footnote><footnote id="F4">As a result of the receipt of the 1,396,462 Tranche B Shares issued to Holdings upon exercise of a 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">On October 8, 2003, in accordance with the Purchase Agreement, Holdings assigned a portion of the SIGA Option to TransTech Pharma, Inc. ("TTP"), an entity affiliated with Ronald Perelman, a joint filer hereunder, for no consideration.  TTP is a corporation in which Mr. Perelman has a direct ownership interest.  Mr. Perelman disclaims beneficial ownership of the securities reported on the Form 4 as owned by TTP, except to the extent of his pecuniary interest therein.  Neither Holdings nor Mafco Holdings Inc. has any pecuniary interest in securities held by TTP.</footnote><footnote id="F6
">As a result of the receipt of the warrant to purchase 698,232 shares of Common Stock issued to Holdings upon exercise of a portion of the SIGA Option, the SIGA Option was reduced by a like amount. The SIGA Option was acquired for no consideration.</footnote></footnotes><remarks>Ronald O. Perelman, a joint filer hereunder, beneficially owns 100% of the common stock of Mafco Holdings Inc., which beneficially owns 100% of the common stock of MacAndrews &amp; Forbes Holdings Inc.  MacAndrews &amp; Forbes Holdings Inc. has beneficial ownership of the securities described in Tables I and II hereof.</remarks><ownerSignature><signatureName>Barry F. Schwartz
Executive Vice President and General Counsel</signatureName><signatureDate>2003-10-10</signatureDate></ownerSignature><ownerSignature><signatureName>Barry F. Schwartz for Ronald O. Perelman, pursuant to a Power of Attorney filed with the Securities and Exchange Commission</signatureName><signatureDate>2003-10-10</signatureDate></ownerSignature><ownerSignature><signatureName>Barry F. Schwartz, Executive Vice President and General Counsel</signatureName><signatureDate>2003-10-10</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
