Siga Technologies Inc (SIGA) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

70,731,322Shares Outstanding

2,312,520Shares held by institutions

$15,678,886Value of institutional holdings

50.43%Institutional ownership %

7.70%Shares Changed QoQ

184No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, Siga Technologies Inc (NASDAQ:SIGA) is held by 184 institutional firms.

Siga Technologies saw its institutional ownership percentage rose to 50.4% in December 2025 from 48.0% in September 2025.
The company experienced a 7.70% quarterly change in institutional shares held, alongside an increase of 8.24% in total owners annually.
Of these 184 institutional investors, 93 increased their holdings in Siga Technologies, while 57 of them reduced positions, and 34 investors maintained their exposure.
Collectively, institutional investors increased their stake in Siga Technologies to 35.67Mn shares as of December 2025, a change that is up by 2.55Mn shares quarter on quarter and up 1.01Mn shares year over year.
BlackRock, Inc.'s holding of 3.59Mn shares as of December 31, 2025 makes it the primary institutional investor in Siga Technologies, owning 5.07% of the stock.
Among the most significant buyers of Siga Technologies during December 2025 were AQR CAPITAL MANAGEMENT LLC (524.71K), Uniplan Investment Counsel, Inc. (377.63K), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (244.85K), MILLENNIUM MANAGEMENT LLC (232.97K), ACADIAN ASSET MANAGEMENT LLC (208.71K).
Leading sellers of Siga Technologies stock in December 2025 included FEDERATED HERMES, INC. (209.67K), MORGAN STANLEY (162.51K), UBS Group AG (150.62K), JANUS HENDERSON GROUP PLC (100.37K), CITADEL ADVISORS LLC (82.08K).
The top 10 institutional holders of Siga Technologies for the quarter ending December 2025 included 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 (1.00Mn), JUPITER ASSET MANAGEMENT LTD (990.65K).

184 Institutional Holders

2,312,520 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	3,589,270	63,261	1.79%	$21,930,440.00
VANGUARD GROUP INC	31 Dec, 2025	2,723,750	67,808	2.55%	$16,642,113.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	2,536,794	104,414	4.29%	$15,500,185.00
AltraVue Capital, LLC	31 Dec, 2025	2,408,824	-8,690	-0.36%	$14,717,914.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	1,165,489	-67,243	-5.45%	$7,121,141.00
STATE STREET CORP	31 Dec, 2025	1,075,570	41,716	4.03%	$6,571,733.00
CITADEL ADVISORS LLC	31 Dec, 2025	1,043,083	-82,080	-7.29%	$6,373,237.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	1,025,080	190,397	22.81%	$6,263,239.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,004,734	6,512	0.65%	$6,140,303.00
JUPITER ASSET MANAGEMENT LTD	31 Dec, 2025	990,648	0	0.00%	$6,052,859.00
AQR CAPITAL MANAGEMENT LLC	31 Dec, 2025	872,795	524,714	150.74%	$5,332,778.00
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC	31 Dec, 2025	819,447	-8,140	-0.98%	$5,006,821.00
Uniplan Investment Counsel, Inc.	31 Dec, 2025	774,154	377,635	95.24%	$4,730,086.00
FIRST WILSHIRE SECURITIES MANAGEMENT INC	31 Dec, 2025	684,053	-3,844	-0.56%	$4,179,564.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	647,146	115,006	21.61%	$3,954,062.00
BANK OF AMERICA CORP /DE/	31 Dec, 2025	641,421	122,650	23.64%	$3,919,082.00
CSM Advisors, LLC	31 Dec, 2025	627,870	31,358	5.26%	$3,835.00
ROYCE & ASSOCIATES LP	31 Dec, 2025	611,019	-69,203	-10.17%	$3,733,326.00
Legato Capital Management LLC	31 Dec, 2025	580,545	68,506	13.38%	$3,547,130.00
NEW YORK STATE COMMON RETIREMENT FUND	31 Dec, 2025	570,561	0	0.00%	$3,486,128.00

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