Siga Technologies SIGA Institutional Ownership

NASDAQ SIGA

$3.33 -0.07 (-2.06%)

As of: Oct 1, 2026 · 12:51 PM EDT

Institutions by Trading Activity

161 Institutions

Increased 97 60.2%

Unchanged 17 10.6%

Reduced 47 29.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

49.03%

▲+1.39 pp QoQ

Shares Held by Institutions

35.11Mn

of 71.60Mn outstanding

▲+9.03% QoQ

Shares Outstanding

71.60Mn

36.49Mn held outside 13F filers

Institutional Investors

161

filed 13F for Jun 2026

▼-21 vs prior quarter

Net Shares Added (QoQ)

+2.91Mn

accumulated since last quarter

Value of Holdings

$119.38Mn

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) showed up in the 13F filings of 160 institutional investors as of June 2026.

Collectively, these holders controlled 49.0% of Siga Technologies's outstanding shares in June 2026, up from 47.6% in March 2026.
They increased total shares held in Siga Technologies by 9.03% from the prior quarter, while the number of investors in SIGA decreased 9.09% year over year.
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 2.53Mn shares year over year.
BlackRock, Inc. is the top holder of Siga Technologies as of June 30, 2026, with 4.19Mn shares representing 5.85% of outstanding stock.
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).
Top sellers of SIGA stock for the quarter ending June 2026 included 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).
Business Quant data shows the 10 biggest positions in Siga Technologies as of June 2026 are held by 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

161 Institutional Holders

Report period 30 Jun, 2026

Total shares held 35.11Mn

Of outstanding 49.03%

#	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 161 holders