SIGA TECHNOLOGIES INC — Director's Dealing 2011

May 26, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SIGA TECHNOLOGIES INC (SIGA)
CIK: 0001010086
Period of Report: 2011-05-25

Reporting Person: ROSE ERIC A MD (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-25	Common Stock, par value $.0001 per share	F	81879	$13.36	Disposed	480301	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock, par value $.0001 per share	13300	Indirect

Footnotes

F1: This Form 4 reports the surrender to the Issuer of 81,879 shares of Common Stock of the Issuer by the Reporting Person in order to satisfy certain withholding tax obligations.