Dennis E. Hruby - 13 Mar 2026 Form 4 Insider Report for SIGA TECHNOLOGIES INC (SIGA)

Role
EVP & Chief Scientific Officer
Signature
/s/ Larry R. Miller, as Attorney-in-Fact
Issuer symbol
SIGA
Transactions as of
13 Mar 2026
Net transactions value
$0
Form type
4
Filing time
17 Mar 2026, 16:09:22 UTC
Previous filing
02 Jul 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Hruby Dennis E EVP & Chief Scientific Officer C/O SIGA TECHNOLOGIES, INC., 31 EAST 62ND STREET, NEW YORK /s/ Larry R. Miller, as Attorney-in-Fact 17 Mar 2026 0001301548

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 +11,445 +6% $0.000000* 202,492 13 Mar 2026 Direct F1
transaction SIGA Common Stock, par value $.0001 per share Tax liability -3,955 -2% $5.26* 198,537 13 Mar 2026 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 -11,445 -33% $0.000000* 22,891 13 Mar 2026 Common Stock, par value $.0001 per share 11,445 Direct F3
transaction SIGA Restricted Stock Units Award +54,942 $0.000000* 54,942 13 Mar 2026 Common Stock, par value $.0001 per share 54,942 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 March 13, 2025.
F2 Represents the withholding by the Issuer of shares of Common Stock (based on $5.26 per share, the closing stock price on March 13, 2026) 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.