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Equibles

SIGA

Siga Technologies Inc

Company with tickers: SIGA

CIK
1010086
CUSIP
826917106
Shares Outstanding
71,724,097
13F Activity (30d)
63 filings 58 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 143
Total Value: $92,661,395
Total Shares: 17,319,900
Showing 1–100 of 143 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 143 13F filers · Δ vs Dec 31, 2025
Top Holder
14.0%
Jun 2023 → Mar 2026 · range 10.1% – 14.0%
+0.9 pts
Top 5
45.0%
Jun 2023 → Mar 2026 · range 36.2% – 45.0%
+8.4 pts
Top 10
62.2%
Jun 2023 → Mar 2026 · range 52.0% – 63.8%
+6.8 pts
HHI
553
Jun 2023 → Mar 2026 · range 395 – 553
Broadly held+109

Quarterly Activity

vs Dec 31, 2025
New
22
Increased
52
Decreased
50
Sold Out
47
Unchanged
19
Holder count: -25
Institutional value: -17.0%
Shares held: -5.2%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega TWO SIGMA INVESTMENTS, LP +423,261 433,661
Mega GEODE CAPITAL MANAGEMENT, LLC +310,811 1,315,545
Small FIRST WILSHIRE SECURITIES MANAGEMENT INC +206,445 890,498
Mega AMERICAN CENTURY COMPANIES INC +152,295 1,317,784
Large Creative Planning +96,274 168,555

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large JACOBS LEVY EQUITY MANAGEMENT, INC −204,320 291,846
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC −127,204 625
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM −107,349 131,626
Large ACADIAN ASSET MANAGEMENT LLC −105,705 188,484
Mega D. E. Shaw & Co., Inc. −98,186 456,385

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,714,380 $9,171,933
Large HRT FINANCIAL LP 360,067 $1,926,358
Mega VANGUARD FIDUCIARY TRUST CO 275,178 $1,472,202
Large MACQUARIE GROUP LTD 244,853 $1,309,963
Mega Vanguard Global Advisers, LLC 90,778 $485,662

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 1,025,080 $6,263,238
Large JUPITER ASSET MANAGEMENT LTD 990,648 $6,052,858
Mid CSM Advisors, LLC 627,870 $3,836,285
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 244,853 $1,496,051
Large STATE OF WISCONSIN INVESTMENT BOARD 215,316 $1,315,580
Filter: New 22 Increased 52 Reduced 50 Sold out 47 Unchanged 19
Showing 100 of 143
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid AltraVue Capital, LLC $13,011,327 14.04% 2,432,024
Mega VANGUARD CAPITAL MANAGEMENT LLC $9,171,933 9.90% 1,714,380
Mega AMERICAN CENTURY COMPANIES INC $7,050,144 7.61% 1,317,784
Mega GEODE CAPITAL MANAGEMENT, LLC $7,038,165 7.60% 1,315,545
Mega STATE STREET CORP $5,413,868 5.84% 1,011,938
Small FIRST WILSHIRE SECURITIES MANAGEMENT INC Broker-Dealer $4,764,164 5.14% 890,498
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $3,160,571 3.41% 590,761
Large LSV ASSET MANAGEMENT $2,881,670 3.11% 538,630
Mid Legato Capital Management LLC $2,739,408 2.96% 512,039
Mega D. E. Shaw & Co., Inc. $2,441,659 2.64% 456,385
Small DENALI ADVISORS LLC $2,337,345 2.52% 436,887
Mega TWO SIGMA INVESTMENTS, LP $2,320,086 2.50% 433,661
Small Uniplan Investment Counsel, Inc. $1,987,059 2.14% 371,413
Large HRT FINANCIAL LP $1,926,358 2.08% 360,067
Mega NORTHERN TRUST CORP Bank $1,819,934 1.96% 340,175
Large JACOBS LEVY EQUITY MANAGEMENT, INC $1,561,376 1.69% 291,846
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,472,202 1.59% 275,178
Mid SEGALL BRYANT & HAMILL, LLC $1,463,342 1.58% 273,522
Large MACQUARIE GROUP LTD $1,309,963 1.41% 244,853
Large ACADIAN ASSET MANAGEMENT LLC $1,008,389 1.09% 188,484
Large Creative Planning $901,769 0.97% 168,555
Mega FIRST TRUST ADVISORS LP $857,899 0.93% 160,355
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $704,199 0.76% 131,626
Mid WINTON GROUP Ltd $665,491 0.72% 124,391
Large STRS OHIO $587,965 0.63% 109,900
Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC $573,188 0.62% 107,138
Small SummerHaven Investment Management, LLC $540,483 0.58% 101,025
Mega Nuveen, LLC $539,809 0.58% 100,899
Large Man Group plc $505,644 0.55% 94,513
Large Trexquant Investment LP $499,904 0.54% 93,440
Mid MARTINGALE ASSET MANAGEMENT L P $493,591 0.53% 92,260
Mid Campbell & CO Investment Adviser LLC $492,868 0.53% 92,125
Mega Vanguard Global Advisers, LLC $485,662 0.52% 90,778
Large KLP KAPITALFORVALTNING AS $466,520 0.50% 87,200
Small State of Wyoming $456,034 0.49% 85,240
Large LOS ANGELES CAPITAL MANAGEMENT LLC $369,588 0.40% 69,082
Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $356,673 0.38% 66,668
Large Jefferies Financial Group Inc. $335,268 0.36% 62,667
Large Squarepoint Ops LLC $313,354 0.34% 58,571
Mid Empirical Financial Services, LLC d.b.a. Empirical Wealth Management $287,262 0.31% 53,694
Small JAMES INVESTMENT RESEARCH, INC. $286,471 0.31% 53,546
Mega RHUMBLINE ADVISERS $273,609 0.30% 51,142
Small Strategic Blueprint, LLC $267,500 0.29% 50,000
Large DAVENPORT & Co LLC $267,500 0.29% 50,000
Large SEI INVESTMENTS CO $259,046 0.28% 48,420
Mid EXCHANGE TRADED CONCEPTS, LLC $250,797 0.27% 46,878
Small DGS Capital Management, LLC $227,021 0.25% 42,434
Mid Cambria Investment Management, L.P. $225,144 0.24% 42,083
Mid Vestcor Inc $220,420 0.24% 41,200
Small Inspire Advisors, LLC $218,403 0.24% 40,823
Large Cresset Asset Management, LLC $217,691 0.23% 40,690
Small EntryPoint Capital, LLC $204,370 0.22% 38,200
Large Russell Investments Group, Ltd. $201,505 0.22% 37,665
Mega DEUTSCHE BANK AG\ Bank $198,827 0.21% 37,164
Large Quantinno Capital Management LP $169,001 0.18% 31,589
Large Empowered Funds, LLC $162,190 0.18% 30,316
Mid Graham Capital Management, L.P. $160,002 0.17% 29,907
Micro WASHINGTON GROWTH STRATEGIES LLC $140,255 0.15% 26,216
Mid Engineers Gate Manager LP $139,078 0.15% 25,996
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $132,503 0.14% 24,767
Large LAZARD ASSET MANAGEMENT LLC $131,176 0.14% 24,519
Small CIM INVESTMENT MANAGEMENT INC $130,427 0.14% 24,379
Large CIBC Bancorp USA Inc. Bank $125,103 0.14% 23,384
Micro Significant Wealth Partners LLC $123,750 0.13% 23,131
Large Mariner, LLC $112,473 0.12% 21,023
Large GUGGENHEIM CAPITAL LLC $109,011 0.12% 20,376
Micro October Effect Ltd $108,605 0.12% 20,300
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $104,464 0.11% 19,526
Mid EP Wealth Advisors, LLC $102,329 0.11% 19,127
Large MERCER GLOBAL ADVISORS INC /ADV $101,002 0.11% 18,879
Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension $95,765 0.10% 17,900
Mega CITIGROUP INC $92,399 0.10% 17,271
Large Kestra Advisory Services, LLC $86,135 0.09% 16,100
Mid Vanguard Personalized Indexing Management, LLC $84,893 0.09% 15,868
Large Corient Private Wealth LLC $75,242 0.08% 14,064
Large COMMONWEALTH EQUITY SERVICES, LLC $73,471 0.08% 13,733
Large IEQ CAPITAL, LLC $72,406 0.08% 13,534
Mega HSBC HOLDINGS PLC $71,609 0.08% 13,385
Small GLOBEFLEX CAPITAL L P $70,106 0.08% 13,104
Small Onyx Bridge Wealth Group LLC $69,550 0.08% 13,000
Small Headlands Technologies LLC $68,806 0.07% 12,861
Large CAPTRUST FINANCIAL ADVISORS $68,496 0.07% 12,803
Mid China Universal Asset Management Co., Ltd. $67,987 0.07% 12,708
Mega ENVESTNET ASSET MANAGEMENT INC $64,483 0.07% 12,053
Mid Metis Global Partners, LLC $62,948 0.07% 11,766
Large MetLife Investment Management, LLC $62,899 0.07% 11,757
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $62,284 0.07% 11,642
Large Police & Firemen's Retirement System of New Jersey Pension $61,064 0.07% 11,414
Mid State of Alaska, Department of Revenue $58,945 0.06% 11,018
Large Cerity Partners LLC $57,715 0.06% 10,788
Mega Legal & General Group Plc $57,228 0.06% 10,697
Mega BNP PARIBAS ARBITRAGE, SA $55,228 0.06% 10,323
Large CWM, LLC $54,425 0.06% 10,173
Small OneAscent Financial Services LLC $54,216 0.06% 10,134
Large OSAIC HOLDINGS, INC. $40,772 0.04% 7,621
Mid SIGNATUREFD, LLC $25,947 0.03% 4,850
Mid SIMPLEX TRADING, LLC $23,984 0.03% 4,483
Mid SBI Securities Co., Ltd. Broker-Dealer $21,394 0.02% 3,999
Mid Ameritas Investment Partners, Inc. $20,190 0.02% 3,774
Large Mirae Asset Global Investments Co., Ltd. $19,982 0.02% 3,735

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