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Who owns Siga Technologies (SIGA) stock

159 funds reported Siga Technologies (SIGA) shares in their latest 13F filings, worth $145M in all. The largest holder is Vanguard Group ($16.6M). Last quarter 90 funds added to their stakes and 70 cut them.

Largest holders of SIGA (13F)Largest holders of SIGA (13F)Vanguard Group$16.6MBlackRock$15.2MDimensional Fund Advisors LP$9.9MAltraVue Capital, LLC$8.5MVanguard Capital Management LLC$6.2MAmerican Century Companies$5.5MArrowstreet Capital, Limited Part…$5.4MGeode Capital Management, LLC$5.2MFirst Wilshire Securities Managem…$4.9MAQR Capital Management LLC$4.5M

Largest holders (13F)

FundSharesValueChangeQuarter
Vanguard Group2,723,750$16.6Mincrease2025-12-31
BlackRock4,186,282$15.2Mincrease2026-06-30
Dimensional Fund Advisors LP2,719,568$9.9Mincrease2026-06-30
AltraVue Capital, LLC2,327,144$8.5Mdecrease2026-06-30
Vanguard Capital Management LLC1,712,701$6.2Mdecrease2026-06-30
American Century Companies1,506,065$5.5Mincrease2026-06-30
Arrowstreet Capital, Limited Partnership1,474,817$5.4Mdecrease2026-06-30
Geode Capital Management, LLC1,417,092$5.2Mincrease2026-06-30
First Wilshire Securities Management1,339,883$4.9Mincrease2026-06-30
AQR Capital Management LLC1,245,992$4.5Mincrease2026-06-30
State Street1,133,989$4.1Mincrease2026-06-30
Hotchkis & Wiley Capital Management LLC914,047$3.3Mincrease2026-06-30
Qube Research & Technologies740,910$2.7Mincrease2026-06-30
Foundry Partners, LLC447,783$2.5Mincrease2025-03-31
New York State Common Retirement Fund590,761$2.2Munchanged2026-06-30

Siga Technologies' latest quarter

Siga Technologies, Q2 2026: revenue $41.0M (-50% year over year), operating margin 33.9%, net earnings $12.5M, operating cash flow $15.2M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most SIGA stock?

By the latest 13F filings: Vanguard Group ($16.6M); BlackRock ($15.2M); Dimensional Fund Advisors LP ($9.9M); AltraVue Capital, LLC ($8.5M); Vanguard Capital Management LLC ($6.2M).

What is the short interest in SIGA?

3,563,320 shares were sold short at the 2026-10-15 settlement, -1.04% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.