SEC Form 4 · accession 0001193125-26-266410

SIGA TECHNOLOGIES INC · SIGA

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Director

Period of report

Jun 9, 2026

Accepted (ET)

Jun 10, 2026 · 9:26 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0001010086

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock, par value $.0001 per share^F1	Jun 9, 2026	M	24,116	—	A	80,989	D
Common Stock, par value $.0001 per share	Jun 9, 2026	D	7,235	$4.39	D	73,754	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Restricted Stock Units^F1,F3	—	Jun 9, 2026	M	24,116	D	—	—	Common Stock, par value $.0001 per share	24,116	0	D
Restricted Stock Units^F4,F5	—	Jun 9, 2026	A	34,169	A	—	—	Common Stock, par value $.0001 per share	34,169	34,169	D

F1Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.
F2Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.
F3The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.
F4RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.
F5The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.