Siga Technologies SIGA Institutional Ownership

NASDAQ SIGA

$3.09 -0.11 (-3.44%)

As of: Sep 9, 2026 · 3:59 PM EDT

Institutions by Trading Activity

160 Institutions

Increased 96 60.0%

Unchanged 17 10.6%

Reduced 47 29.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

49.00%

▲+1.09 pp QoQ

Shares Held by Institutions

35.08Mn

of 71.60Mn outstanding

▲+9.03% QoQ

Shares Outstanding

71.60Mn

36.52Mn held outside 13F filers

Institutional Investors

160

filed 13F for Jun 2026

▼-22 vs prior quarter

Net Shares Added (QoQ)

+2.90Mn

accumulated since last quarter

Value of Holdings

$115.43Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Siga Technologies Inc (NASDAQ:SIGA) has 160 institutional investors with active 13F positions as of June 2026.

These investors collectively held 49.0% of Siga Technologies's outstanding shares in June 2026, up from 47.9% in March 2026.
They increased total shares held in Siga Technologies by 9.03% from last quarter, and the number of investors in SIGA decreased 9.09% annually.
Activity in SIGA broke down as 96 buyers, 47 sellers, and 17 unchanged among 160 total holders.
The aggregate institutional position in Siga Technologies amounted to 35.08Mn shares as of June 2026, up by 2.9Mn shares quarter on quarter, and up 1.48Mn shares year over year.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Siga Technologies with 4.19Mn shares, accounting for 5.85% of total shares outstanding.
The most significant purchases of SIGA for the quarter ending June 2026 came from BlackRock, Inc. (692.09K), FIRST WILSHIRE SECURITIES MANAGEMENT INC (449.38K), Sixth Street Partners Management Company, L.P. (349.82K), Qube Research & Technologies Ltd (325.81K), JACOBS LEVY EQUITY MANAGEMENT, INC (275.02K).
Leading sellers of Siga Technologies shares for the quarter ending June 2026 were Goldman Sachs Group Inc (231.9K), D. E. Shaw & Co., Inc. (191.48K), CITADEL ADVISORS LLC (153.89K), STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM (118.27K), ROYCE & ASSOCIATES LP (116.64K).
Per Business Quant data, the top 10 holders of Siga Technologies for the quarter ending June 2026 are BlackRock, Inc. (4.19Mn), DIMENSIONAL FUND ADVISORS LP (2.72Mn), AltraVue Capital, LLC (2.33Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.71Mn), AMERICAN CENTURY COMPANIES INC (1.51Mn), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (1.47Mn), GEODE CAPITAL MANAGEMENT, LLC (1.42Mn), FIRST WILSHIRE SECURITIES MANAGEMENT INC (1.34Mn), AQR CAPITAL MANAGEMENT LLC (1.25Mn), State Street Corp (1.13Mn).

Form 13F Holdings

160 Institutional Holders

Report period 30 Jun, 2026

Total shares held 35.08Mn

Of outstanding 49.00%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	4,186,282	5.85%	▲692,089	+19.81%	$15.24Mn
2	DIMENSIONAL FUND ADVISORS LP	0000354204	2,719,568	3.80%	▲16,844	+0.62%	$9.90Mn
3	AltraVue Capital, LLC	0001740837	2,327,144	3.25%	▼104,880	-4.31%	$8.47Mn
4	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,712,701	2.39%	▼1,679	-0.10%	$6.23Mn
5	AMERICAN CENTURY COMPANIES INC	0000748054	1,506,065	2.10%	▲188,281	+14.29%	$5.48Mn
6	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	1,474,817	2.06%	▼51,143	-3.35%	$5.37Mn
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,417,092	1.98%	▲101,547	+7.72%	$5.16Mn
8	FIRST WILSHIRE SECURITIES MANAGEMENT INC	0000732847	1,339,883	1.87%	▲449,385	+50.46%	$4.88Mn
9	AQR CAPITAL MANAGEMENT LLC	0001167557	1,245,992	1.74%	▲26,315	+2.16%	$4.54Mn
10	State Street Corp	0000093751	1,133,989	1.58%	▲122,051	+12.06%	$4.13Mn
11	HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC	0001164833	914,047	1.28%	▲87,000	+10.52%	$3.33Mn
12	Qube Research & Technologies Ltd	0001729829	740,910	1.03%	▲325,806	+78.49%	$2.70Mn
13	NEW YORK STATE COMMON RETIREMENT FUND	0000810265	590,761	0.83%	0	0.00%	$2.15Mn
14	MILLENNIUM MANAGEMENT LLC	0001273087	579,599	0.81%	▲113,275	+24.29%	$2.11Mn
15	JACOBS LEVY EQUITY MANAGEMENT, INC	0000884414	566,863	0.79%	▲275,017	+94.23%	$2.06Mn
16	Uniplan Investment Counsel, Inc.	0001520710	560,353	0.78%	▲188,940	+50.87%	$2.04Mn
17	CITADEL ADVISORS LLC	0001423053	551,246	0.77%	▼153,891	-21.82%	$2.01Mn
18	ROYCE & ASSOCIATES LP	0000906304	551,010	0.77%	▼116,636	-17.47%	$2.01Mn
19	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	549,697	0.77%	▼37,277	-6.35%	$2.00Mn
20	Legato Capital Management LLC	0001442641	512,039	0.72%	0	0.00%	$1.86Mn

Showing 1 to 20 of 160 holders