Miller Larry R. 4

4 · SIGA TECHNOLOGIES INC · Filed Mar 26, 2026

AI-generated summary of this filing

Updated Mar 26, 2026

SIGA GC Larry Miller Receives RSU Award — 6,920 Shares Vest

What Happened

Larry R. Miller, General Counsel of SIGA Technologies, had 6,920 restricted stock units (RSUs vest) convert into common stock on March 25, 2026. The filing shows 6,920 shares acquired at $0.00 (vesting). To satisfy tax withholding, the issuer withheld 3,526 shares valued at $4.99 each (the March 25 closing price), totaling $17,595. The net result is 3,394 shares added to his holdings (6,920 vested − 3,526 withheld).
This was not an open‑market purchase or a sale for investment reasons; it was a routine vesting of an award with a cashless tax withholding.

Key Details

Transaction date: March 25, 2026; Form 4 filed March 26, 2026 (appears timely).
Vesting/conversion: 6,920 RSUs converted to 6,920 shares (reported at $0.00 per share).
Tax withholding: 3,526 shares withheld at $4.99 per share = $17,595.
Net shares received: 3,394 shares.
Shares owned after transaction: Not specified in the provided filing excerpt.
Footnotes: F1 confirms the shares came from one‑third of RSUs granted March 25, 2024; F2 explains issuer withheld shares to satisfy tax withholding using the $4.99 closing price; F3 notes RSUs vest one‑third per year over three years.
Transaction codes: M = exercise/conversion of derivative (RSU conversion); F = tax withholding.

Context

RSUs convert to common shares one‑for‑one when they vest. Withholding some vested shares to cover taxes (a cashless withholding) is a common administrative step and does not by itself indicate insider sentiment.
This is an award/vesting event rather than a market buy or sale; retail investors generally view such filings as routine compensation-related transactions.

Form 4

Period: 2026-03-25

General Counsel

Transactions

Exercise/Conversion
Common Stock, par value $.0001 per share
[F1]
2026-03-25+6,920→ 55,438 total
Tax Payment
Common Stock, par value $.0001 per share
[F2]
2026-03-25$4.99/sh−3,526$17,595→ 51,912 total
Exercise/Conversion
Restricted Stock Units
[F3]
2026-03-25−6,920→ 6,921 total
→ Common Stock, par value $.0001 per share (6,920 underlying)

Footnotes (3)

[F1]Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 25, 2024.
[F2]Represents the withholding by the Issuer of shares of Common Stock (based on $4.99 per share, the closing stock price on March 25, 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.

Signature

/s/ Larry R. Miller|2026-03-26

1 file