Siga Technologies Inc (SIGA) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

2,288,162Shares held by institutions

$12,047,173Value of institutional holdings

46.84%Institutional ownership %

-3.76%Shares Changed QoQ

176No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Siga Technologies Inc (NASDAQ:SIGA) appears in 192 institutional 13F filings for the quarter ending December 2025.

They owned 50.2% of outstanding stock in December 2025, up from 48.6% the prior quarter.
Their total shares held in SIGA increased 5.39% from the prior quarter, while the number of investors in Siga Technologies increased 13.61% year over year.
Activity in SIGA broke down as 97 buyers, 60 sellers, and 35 unchanged among 192 total holders.
Altogether, these fund groups held 35.97Mn shares in SIGA by December 2025, up by 1.84Mn shares quarter on quarter, and up 342.1K shares year over year.
BlackRock, Inc. is the top holder of Siga Technologies as of December 31, 2025, with 3.59Mn shares representing 5.01% of outstanding stock.
The largest buyers of Siga Technologies for the quarter ending December 2025 were AQR CAPITAL MANAGEMENT LLC (524.71K), Uniplan Investment Counsel, Inc. (377.64K), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (244.85K), MILLENNIUM MANAGEMENT LLC (232.97K), ACADIAN ASSET MANAGEMENT LLC (208.71K).
The largest sellers of Siga Technologies for the quarter ending December 2025 were Bank Of America Corp /De/ (396.12K), Jpmorgan Chase & Co (237.14K), Federated Hermes, Inc. (209.67K), Morgan Stanley (162.51K), UBS Group AG (150.62K).
Business Quant data shows the 10 biggest positions in Siga Technologies as of December 2025 are held by BlackRock, Inc. (3.59Mn), VANGUARD GROUP INC (2.72Mn), DIMENSIONAL FUND ADVISORS LP (2.54Mn), AltraVue Capital, LLC (2.41Mn), AMERICAN CENTURY COMPANIES INC (1.17Mn), State Street Corp (1.08Mn), CITADEL ADVISORS LLC (1.04Mn), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (1.03Mn), GEODE CAPITAL MANAGEMENT, LLC (1.0Mn), JUPITER ASSET MANAGEMENT LTD (990.65K).

192 Institutional Holders

2,288,162 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	63,261	1.79%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	67,808	2.55%	$0.00
AltraVue Capital, LLC	31 Dec, 2025	-8,690	-0.36%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	52,622	167.59%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	104,414	4.29%	$0.00
CSM Advisors, LLC	31 Dec, 2025	31,358	5.26%	$0.00
Barclays Plc	31 Dec, 2025	-73,105	-48.60%	$0.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	-67,243	-5.45%	$0.00
Qube Research & Technologies Ltd	31 Dec, 2025	118,646	256.87%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	348	0.00%	$0.00
State Street Corp	31 Dec, 2025	41,716	4.03%	$0.00
SummerHaven Investment Management, LLC	31 Dec, 2025	0	0.00%	$0.00
CITADEL ADVISORS LLC	31 Dec, 2025	-82,080	-7.29%	$0.00
Integrated Quantitative Investments LLC	31 Dec, 2025	104,645	0.00%	$0.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	190,397	22.81%	$0.00
Nuveen, LLC	31 Dec, 2025	0	0.00%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	6,512	0.65%	$0.00
WINTON GROUP Ltd	31 Dec, 2025	-8,206	-7.77%	$0.00
JUPITER ASSET MANAGEMENT LTD	31 Dec, 2025	0	0.00%	$0.00
KLP KAPITALFORVALTNING AS	31 Dec, 2025	8,600	9.82%	$0.00

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