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(Continued on following pages)

1.	Name of Reporting Person. I.R.S. Identification No. of above person   MacAndrews & Forbes Incorporated
2.	Check the Appropriate Box if a Member of a Group			(a) ☐ (b) ☐
3.	SEC Use Only
4.	Source of Funds   WC
5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				☐
6.	Citizenship or Place of Organization   Delaware
Number of Shares Beneficially Owned by Each Reporting Person with		7.	Sole Voting Power   0
		8.	Shared Voting Power   13,509,722
		9.	Sole Dispositive Power   0
		10.	Shared Dispositive Power   13,509,722
11.	Aggregate Amount Beneficially Owned by Each Reporting Person   13,509,722
12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares				☐
13.	Percent of Class Represented by Amount in Row (11)   24.9%
14.	Type of Reporting Person   CO

  

1.	Name of Reporting Person. I.R.S. Identification No. of above person   MacAndrews & Forbes LLC
2.	Check the Appropriate Box if a Member of a Group			(a) ☐ (b) ☐
3.	SEC Use Only
4.	Source of Funds   WC
5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)					☐
6.	Citizenship or Place of Organization   Delaware
Number of Shares Beneficially Owned by Each Reporting Person with		7.	Sole Voting Power   0
		8.	Shared Voting Power   13,509,722
		9.	Sole Dispositive Power   0
		10.	Shared Dispositive Power   13,509,722
11.	Aggregate Amount Beneficially Owned by Each Reporting Person   13,509,722
12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares				☐
13.	Percent of Class Represented by Amount in Row (11)   24.9%
14.	Type of Reporting Person   OO

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This statement (“Amendment No. 13”) amends and supplements the statement on Schedule 13D, dated August 13, 2003, as amended by Amendment No. 1 thereto dated October 14, 2003, Amendment No. 2 thereto dated January 8, 2004, Amendment No. 3 thereto dated November 29, 2007, Amendment No. 4 thereto dated June 19, 2008, Amendment No. 5 thereto dated April 29, 2009, Amendment No. 6 thereto dated July 30, 2009, Amendment No. 7 thereto dated September 17, 2009, Amendment No. 8 thereto dated September 30, 2009, Amendment No. 9 thereto dated June 22, 2010, Amendment No. 10 thereto dated July 27, 2010, Amendment No. 11 thereto dated May 17, 2012 and Amendment No. 12 thereto dated November 6, 2014 (as so amended, the “Schedule 13D”), filed with the Securities and Exchange Commission by MacAndrews & Forbes Incorporated (formerly known as MacAndrews & Forbes Holdings Inc.), a Delaware corporation (“M&F”), MacAndrews & Forbes LLC, a Delaware limited liability company (“MacAndrews & Forbes”), TransTech Pharma, Inc., a Delaware corporation (“TransTech”) and STH Partners, L.P., a Delaware limited partnership (“STH”), relating to the shares of common stock, par value $0.0001 per share (“Common Stock”), of SIGA Technologies, Inc., a Delaware corporation (the “Company”). This Amendment No. 13 is being filed by M&F and MacAndrews & Forbes with respect to shares of Common Stock that may be deemed to be beneficially owned by the Reporting Persons. M&F is a holding company (the sole stockholder of which is Mr. Ronald O. Perelman) and MacAndrews & Forbes is a direct wholly owned subsidiary of M&F. Further, to the extent applicable, the Schedule 13D, as amended by this Amendment No. 13, is hereby adopted as the initial Schedule 13D of ST Holdings One LLC, a Delaware limited liability company and direct wholly owned subsidiary of MacAndrews & Forbes (“ST Holdings One”), in respect of the Common Stock of the Company. The Company has its principal executive offices at 660 Madison Avenue, Suite 1700, New York, NY 10065.  Capitalized terms used herein shall have the meanings ascribed to them in the Schedule 13D unless otherwise defined herein.

 

Item 2.  Identity and Background

 

Item 2 is hereby amended by adding the following at the end thereof:

 

(a)-(c) A Second Amended and Restated Schedule I, which includes certain required information regarding the Reporting Persons, is attached hereto and is incorporated herein by reference.

 

Each of the natural persons named on the Second Amended and Restated Schedule I is a United States citizen. Each corporation or limited liability company named on the Second Amended and Restated Schedule I (collectively with the natural persons listed on the Second Amended and Restated Schedule I, the “Schedule I Persons”) was formed under the laws of the State of Delaware. During the last five years, none of the Reporting Persons or the Schedule I Persons has (i) been convicted in a criminal proceeding (excluding minor traffic violations or similar misdemeanors), or (ii) been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violations with respect to such laws.

 

Item 3.  Source and Amount of Funds or Other Consideration

 

Item 3 is hereby amended by (i) incorporating by reference into this Item 3 the information set forth and/or incorporated by reference into Item 6 and (ii) adding the following at the end of Item 3:

 

Pursuant to an internal reorganization, ST Holdings One is the record holder of all 13,509,722 shares of Common Stock that may be deemed to be beneficially owned by the Reporting Persons.

 

Item 4.  Purpose of the Transaction

 

The information set forth and/or incorporated by reference into Item 6 is hereby incorporated by reference into this Item 4.

 

Item 5. Interest in Securities of the Issuer

 

(a)-(b) Item 5(a)-(b) is hereby amended by adding the following at the end thereof:

 

Based upon information contained in Amendment No. 3 to the Company’s Form S-1 dated October 13, 2016 (as so amended, the “Form S-1”), there were 54,284,296 shares of Common Stock outstanding as of October 12, 2016. As of October 12, 2016 and prior to giving effect to any shares that may be purchased pursuant to the Rights Offering or the Backstop Agreement (each as defined in Item 6 below), the Reporting Persons may be deemed to share beneficial ownership of 13,509,722 shares of Common Stock, representing approximately 24.9% of the Common Stock deemed to be outstanding.

 

The Reporting Persons have shared power to vote and dispose of the shares of Common Stock that they own.

 

Based on documents publicly filed, Paul G. Savas, Executive Vice President and Chief Financial Officer of M&F, MacAndrews & Forbes, and ST Holdings One, may be deemed to beneficially own 196,840 shares of Common Stock (which includes 75,000 shares of Common Stock deemed to be beneficially owned by Mr. Savas but not outstanding).

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	Exhibit 35	Backstop Agreement (incorporated by reference to Exhibit 10(zz) to Amendment No. 3 to Form S-1 filed by the Company on October 13, 2016)
	Exhibit 36	Joint Filing Agreement

	MACANDREWS & FORBES INCORPORATED MACANDREWS & FORBES LLC ST HOLDINGS ONE LLC
	By:	/s/ Michael C. Borofsky
		Name:	Michael C. Borofsky
		Title:	Senior Vice President

 

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Name and Position (if different from Principal Employment)	Present Principal Occupation or Employment
Ronald O. Perelman Chairman and Chief Executive Officer	Director, Chairman and Chief Executive Officer of MacAndrews & Forbes Incorporated
Barry F. Schwartz Executive Vice Chairman	Director and Executive Vice Chairman of MacAndrews & Forbes Incorporated
Paul G. Savas Executive Vice President and Chief Financial Officer	Executive Vice President and Chief Financial Officer of MacAndrews & Forbes Incorporated