SIGA TECHNOLOGIES INC — Director's Dealing 2013

May 1, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SIGA TECHNOLOGIES INC (SIGA)
CIK: 0001010086
Period of Report: 2013-04-30

Reporting Person: MacAndrews & Forbes Holdings Inc. (Director, 10% Owner)
Reporting Person: PERELMAN RONALD O (Director, 10% Owner)
Reporting Person: MacAndrews & Forbes LLC (Director, 10% Owner)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-04-30	Warrant (Right to Buy)	$3.29	J	250000	Acquired	2015-04-30	Common Stock (250000)	Indirect

Footnotes

F1: These warrants to purchase shares of the common stock of SIGA Technologies, Inc. ("SIGA") were acquired by MacAndrews & Forbes LLC in consideration for services to be provided pursuant to a Services Agreement, dated as of April 30, 2013, between SIGA and MacAndrews & Forbes LLC.