Diem Nguyen - 27 Jan 2025 Form 4 Insider Report for SIGA TECHNOLOGIES INC (SIGA)

Role: Chief Executive Officer, Director
Signature: /s/ Diem Nguyen
Issuer symbol: SIGA
Transactions as of: 27 Jan 2025
Net transactions value: -$149,903
Form type: 4
Filing time: 29 Jan 2025, 17:07:01 UTC
Previous filing: 29 Oct 2024
Next filing: 14 Mar 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SIGA	Common Stock, par value $.0001 per share	Options Exercise	$0	+55,902	+158%	$0.000000	91,297	27 Jan 2025	Direct	F1
transaction	SIGA	Common Stock, par value $.0001 per share	Tax liability	$149,903	-23,644	-26%	$6.34	67,653	27 Jan 2025	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SIGA	Restricted Stock Units	Options Exercise	$0	-55,902	-33%	$0.000000	111,805	27 Jan 2025	Common Stock, par value $.0001 per share	55,902		Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on January 27, 2024.
F2	Represents the withholding by the Issuer of shares of Common Stock (based on $6.34 per share, the closing stock price on January 27, 2025) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.
F3	RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.