Comparable stake leader
BlackRock, Inc.
SEC ownership of SIGA TECHNOLOGIES INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001010086.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- SIGA on Nasdaq
- Parsed ownership sources
- 13D/G and 13F
- Largest SEC-reported holder
- BlackRock, Inc.
- Latest 13D/G holder
- BlackRock, Inc.
- Latest parsed ownership date
- 31 Mar 2026
- Issuer CIK
- 0001010086
- Issuer location
- New York, NY
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of SIGA TECHNOLOGIES INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 4.7%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 4.7%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
4.7%
DIMENSIONAL FUND ADVISORS LP
3.8%
AltraVue Capital, LLC
3.4%
VANGUARD CAPITAL MANAGEMENT LLC
2.4%
ARROWSTREET CAPITAL, LIMITED PART...
2.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
4.7%
|
$21,946,451
3,386,798 shares
|
$0 | 31 Mar 2025 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
3.8%
|
$14,459,148
2,702,724 shares
|
— | 31 Mar 2026 |
| AltraVue Capital, LLC |
13F
Company
|
3.4%
|
$13,011,328
2,432,024 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
2.4%
|
$9,171,933
1,714,380 shares
|
— | 31 Mar 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
Company
|
2.1%
|
$8,163,886
1,525,960 shares
|
— | 31 Mar 2026 |
| AMERICAN CENTURY COMPANIES INC |
13F
Company
|
1.8%
|
$7,050,144
1,317,784 shares
|
— | 31 Mar 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
1.8%
|
$7,039,567
1,315,545 shares
|
— | 31 Mar 2026 |
| AQR CAPITAL MANAGEMENT LLC |
13F
Company
|
1.7%
|
$6,525,272
1,219,677 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 10 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to SIGA TECHNOLOGIES INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Eric A. Rose MD
Net 12M change
$0
Latest report
25 Mar 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Eric A. Rose MD | Director | $6,486,360 | Mixed | 15 Jun 2021 | ||
| Joseph W. Marshall III | Director | $3,278,357 | Mixed | 10 Jun 2025 | ||
| Diem Nguyen | Chief Executive Officer, Director | $2,860,185 | Mixed | 13 Mar 2026 | ||
| Daniel J. Luckshire | Executive VP & CFO | $2,148,275 | Mixed | 13 Mar 2026 | ||
| Thomas E. Constance | Director | $1,989,782 | Mixed | 15 Jun 2021 | ||
| Dennis E. Hruby | EVP & Chief Scientific Officer | $1,595,391 | Mixed | 13 Mar 2026 | ||
| Jaymie A. Durnan | Director | $1,066,321 | Mixed | 10 Jun 2025 | ||
| Julian Nemirovsky | Director | $845,770 | Mixed | 10 Jun 2025 | ||
| Holly L. Phillips | Director | $845,770 | Mixed | 10 Jun 2025 | ||
| Gary J. Nabel | Director | $845,770 | Mixed | 10 Jun 2025 | ||
| James Antal | Director | $798,065 | Mixed | 14 Jun 2022 | ||
| Michael C. Plansky | Director | $549,954 | Mixed | 14 Jun 2022 | ||
| Larry R. Miller | General Counsel | $547,701 | Mixed | 25 Mar 2026 | ||
| Harold Eugene Ford Jr. | Director | $476,648 | Mixed | 10 Jun 2025 | ||
| Julie Kane | Director | $383,029 | Mixed | 14 Jun 2022 | ||
| Robin E. Abrams | General Counsel and CAO | $302,207 | Mixed | 31 Jul 2021 | ||
| Evan A. Knisely | Director | $285,962 | Mixed | 11 Jun 2024 | ||
| Jay Varma | EVP & Chief Medical Officer, Director | $135,962 | Mixed | 11 Jun 2024 | ||
| John M. Keane | Director | Mixed | 10 Jun 2025 |
Recent insider transactions for SIGA TECHNOLOGIES INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Larry R. Miller | SIGA | Common Stock, par value $.0001 per share | Tax liability | -6.36% | -3,526 | 51,912 | 25 Mar 2026 | Direct | ||
| Larry R. Miller | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 14.3% | 6,920 | 55,438 | 25 Mar 2026 | Direct | ||
| Larry R. Miller | SIGA | Restricted Stock Units | Options Exercise | -50% | -6,920 | 6,921 | 25 Mar 2026 | Direct | ||
| Daniel J. Luckshire | SIGA | Common Stock, par value $.0001 per share | Tax liability | -2.12% | -6,074 | 280,493 | 13 Mar 2026 | Direct | ||
| Daniel J. Luckshire | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 4.18% | 11,503 | 286,567 | 13 Mar 2026 | Direct | ||
| Daniel J. Luckshire | SIGA | Restricted Stock Units | Award | 55,228 | 55,228 | 13 Mar 2026 | Direct | |||
| Daniel J. Luckshire | SIGA | Restricted Stock Units | Options Exercise | -33.3% | -11,503 | 23,008 | 13 Mar 2026 | Direct | ||
| Dennis E. Hruby | SIGA | Common Stock, par value $.0001 per share | Tax liability | -1.95% | -3,955 | 198,537 | 13 Mar 2026 | Direct | ||
| Dennis E. Hruby | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 5.99% | 11,445 | 202,492 | 13 Mar 2026 | Direct | ||
| Dennis E. Hruby | SIGA | Restricted Stock Units | Award | 54,942 | 54,942 | 13 Mar 2026 | Direct | |||
| Dennis E. Hruby | SIGA | Restricted Stock Units | Options Exercise | -33.3% | -11,445 | 22,891 | 13 Mar 2026 | Direct | ||
| Larry R. Miller | SIGA | Common Stock, par value $.0001 per share | Tax liability | -18.7% | -11,187 | 48,518 | 13 Mar 2026 | Direct | ||
| Larry R. Miller | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 55.3% | 21,261 | 59,705 | 13 Mar 2026 | Direct | ||
| Larry R. Miller | SIGA | Restricted Stock Units | Award | 68,060 | 68,060 | 13 Mar 2026 | Direct | |||
| Larry R. Miller | SIGA | Restricted Stock Units | Options Exercise | -33.3% | -21,261 | 42,523 | 13 Mar 2026 | Direct | ||
| Diem Nguyen | SIGA | Common Stock, par value $.0001 per share | Tax liability | -25.3% | -47,029 | 138,767 | 13 Mar 2026 | Direct | ||
| Diem Nguyen | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 84.4% | 85,045 | 185,796 | 13 Mar 2026 | Direct | ||
| Diem Nguyen | SIGA | Restricted Stock Units | Award | 272,243 | 272,243 | 13 Mar 2026 | Direct | |||
| Diem Nguyen | SIGA | Restricted Stock Units | Options Exercise | -33.3% | -85,045 | 170,092 | 13 Mar 2026 | Direct | ||
| Diem Nguyen | SIGA | Common Stock, par value $.0001 per share | Tax liability | -18.5% | -22,804 | 100,751 | 27 Jan 2026 | Direct | ||
| Diem Nguyen | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 82.6% | 55,902 | 123,555 | 27 Jan 2026 | Direct | ||
| Diem Nguyen | SIGA | Restricted Stock Units | Options Exercise | -50% | -55,902 | 55,903 | 27 Jan 2026 | Direct | ||
| Daniel J. Luckshire | SIGA | Common Stock, par value $.0001 per share | Tax liability | -4.3% | -12,346 | 275,064 | 01 Jul 2025 | Direct | ||
| Daniel J. Luckshire | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 9.19% | 24,193 | 287,410 | 01 Jul 2025 | Direct | ||
| Daniel J. Luckshire | SIGA | Restricted Stock Units | Options Exercise | -100% | -24,193 | 0 | 01 Jul 2025 | Direct | ||
| Dennis E. Hruby | SIGA | Common Stock, par value $.0001 per share | Tax liability | -5.19% | -10,467 | 191,047 | 01 Jul 2025 | Direct | ||
| Dennis E. Hruby | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 19.1% | 32,258 | 201,514 | 01 Jul 2025 | Direct | ||
| Dennis E. Hruby | SIGA | Restricted Stock Units | Options Exercise | -100% | -32,258 | 0 | 01 Jul 2025 | Direct | ||
| John M. Keane | SIGA | Restricted Stock Units | Award | 24,116 | 24,116 | 10 Jun 2025 | Direct | |||
| Harold Eugene Ford Jr. | SIGA | Common Stock, par value $.0001 per share | Disposed to Issuer | -15.7% | -5,725 | 30,657 | 10 Jun 2025 | Direct | ||
| Harold Eugene Ford Jr. | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 110.3% | 19,084 | 36,382 | 10 Jun 2025 | Direct | ||
| Harold Eugene Ford Jr. | SIGA | Restricted Stock Units | Award | 24,116 | 24,116 | 10 Jun 2025 | Direct | |||
| Harold Eugene Ford Jr. | SIGA | Restricted Stock Units | Options Exercise | -100% | -19,084 | 0 | 10 Jun 2025 | Direct | ||
| Julian Nemirovsky | SIGA | Common Stock, par value $.0001 per share | Disposed to Issuer | -9.15% | -5,725 | 56,873 | 10 Jun 2025 | Direct | ||
| Julian Nemirovsky | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 43.9% | 19,084 | 62,598 | 10 Jun 2025 | Direct | ||
| Julian Nemirovsky | SIGA | Restricted Stock Units | Award | 24,116 | 24,116 | 10 Jun 2025 | Direct | |||
| Julian Nemirovsky | SIGA | Restricted Stock Units | Options Exercise | -100% | -19,084 | 0 | 10 Jun 2025 | Direct | ||
| Holly L. Phillips | SIGA | Common Stock, par value $.0001 per share | Disposed to Issuer | -9.15% | -5,725 | 56,873 | 10 Jun 2025 | Direct | ||
| Holly L. Phillips | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 43.9% | 19,084 | 62,598 | 10 Jun 2025 | Direct | ||
| Holly L. Phillips | SIGA | Restricted Stock Units | Award | 24,116 | 24,116 | 10 Jun 2025 | Direct | |||
| Holly L. Phillips | SIGA | Restricted Stock Units | Options Exercise | -100% | -19,084 | 0 | 10 Jun 2025 | Direct | ||
| Joseph W. Marshall III | SIGA | Common Stock, par value $.0001 per share | Disposed to Issuer | -2.43% | -5,725 | 229,642 | 10 Jun 2025 | Direct | ||
| Joseph W. Marshall III | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 8.82% | 19,084 | 235,367 | 10 Jun 2025 | Direct | ||
| Joseph W. Marshall III | SIGA | Restricted Stock Units | Award | 24,116 | 24,116 | 10 Jun 2025 | Direct | |||
| Joseph W. Marshall III | SIGA | Restricted Stock Units | Options Exercise | -100% | -19,084 | 0 | 10 Jun 2025 | Direct | ||
| Jaymie A. Durnan | SIGA | Common Stock, par value $.0001 per share | Disposed to Issuer | -7.38% | -5,725 | 71,873 | 10 Jun 2025 | Direct | ||
| Jaymie A. Durnan | SIGA | Common Stock, par value $.0001 per share | Options Exercise | 32.6% | 19,084 | 77,598 | 10 Jun 2025 | Direct | ||
| Jaymie A. Durnan | SIGA | Restricted Stock Units | Award | 24,116 | 24,116 | 10 Jun 2025 | Direct | |||
| Jaymie A. Durnan | SIGA | Restricted Stock Units | Options Exercise | -100% | -19,084 | 0 | 10 Jun 2025 | Direct | ||
| Gary J. Nabel | SIGA | Common Stock, par value $.0001 per share | Disposed to Issuer | -9.15% | -5,725 | 56,873 | 10 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.