Form 4 for SIGA SIGA TECHNOLOGIES INC
Accepted 2026-03-17 00:00:00 ET · period of report 2026-03-13 · accession 0001193125-26-110759 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-03-17 | 2026-03-13 | SIGA | Nguyen Diem | CEO, Dir | F - Tax | $5.26 | -47.0K | 138.8K | -25% | -$247.4K |
| D | 2026-03-17 | 2026-03-13 | SIGA | Nguyen Diem | CEO, Dir | M - OptEx | $0.00 | +85.0K | 185.8K | +84% | $0 |
| D | 2026-03-17 | 2026-03-13 | SIGA | Nguyen Diem | CEO, Dir | A - Grant | $0.00 | +272.2K | 272.2K | New | $0 |
| D | 2026-03-17 | 2026-03-13 | SIGA | Nguyen Diem | CEO, Dir | M - OptEx | $0.00 | -85.0K | 170.1K | -33% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock, par value $.0001 per share | 2026-03-13 | F | D | 47,029 | $5.26 | 138,767 | D | — | — | (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. |
| 2 | Common | Common Stock, par value $.0001 per share | 2026-03-13 | M | A | 85,045 | $0.00 | 185,796 | D | — | — | (F1) Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 13, 2025. |
| 3 | Derivative | Restricted Stock Units | 2026-03-13 | A | A | 272,243 | $0.00 | 272,243 | D | — · — to — | 272,243 Common Stock, par value $.0001 per share | (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. |
| 4 | Derivative | Restricted Stock Units | 2026-03-13 | M | D | 85,045 | $0.00 | 170,092 | D | — · — to — | 85,045 Common Stock, par value $.0001 per share | (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. |