SIGA TECHNOLOGIES INC (SIGA) — Institutional Holders, Q2 2026

162 institutional investment managers reported a SIGA position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $127.0M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← SIGA stock profile

SIGA in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

Trimmed

Sold out

Biggest buyers

BlackRockAdded · +692,089 sh+$2.5M
FIRST WILSHIRE SECURITIES MANAGEMENTAdded · +449,385 sh+$1.6M
Qube Research & Technologies LtdAdded · +325,806 sh+$1.2M
JACOBS LEVY EQUITY MANAGEMENTAdded · +275,017 sh+$1.0M
SEGALL BRYANT & HAMILLNew · +273,522 sh+$995.6K

Biggest sellers

HRT FINANCIALSold out · -360,067 sh-$1.3M
MACQUARIE GROUP LTDSold out · -244,853 sh-$891.3K
NOMURA ASSET MANAGEMENT INTERNATIONALSold out · -244,853 sh-$891.3K
GOLDMAN SACHS GROUPTrimmed · -231,896 sh-$844.1K
D. E. ShawTrimmed · -191,485 sh-$697.0K

SIGA 13F holders ranked 1–100 of 162

Institutional investors reporting a position in SIGA TECHNOLOGIES INC on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 4,186,282 sh	4,186,282	$15.2M	<0.01%	+19.8%
2	DIMENSIONAL FUND ADVISORS#2 · 2,719,568 sh	2,719,568	$9.9M	<0.01%	+0.6%
3	AltraVue Capital#3 · 2,327,144 sh	2,327,144	$8.5M	0.61%	-4.3%
4	VANGUARD CAPITAL MANAGEMENT#4 · 1,712,701 sh	1,712,701	$6.2M	<0.01%	-0.1%
5	AMERICAN CENTURY COMPANIES#5 · 1,506,065 sh	1,506,065	$5.5M	<0.01%	+14.3%
6	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#6 · 1,474,817 sh	1,474,817	$5.4M	<0.01%	-3.4%
7	GEODE CAPITAL MANAGEMENT#7 · 1,417,092 sh	1,417,092	$5.2M	<0.01%	+7.7%
8	FIRST WILSHIRE SECURITIES MANAGEMENT#8 · 1,339,883 sh	1,339,883	$4.9M	1.00%	+50.5%
9	AQR CAPITAL MANAGEMENT#9 · 1,245,992 sh	1,245,992	$4.5M	<0.01%	+2.2%
10	STATE STREET#10 · 1,133,989 sh	1,133,989	$4.1M	<0.01%	+12.1%
11	HOTCHKIS & WILEY CAPITAL MANAGEMENT#11 · 914,047 sh	914,047	$3.3M	<0.01%	+10.5%
12	Qube Research & Technologies Ltd#12 · 740,910 sh	740,910	$2.7M	<0.01%	+78.5%
13	NEW YORK STATE COMMON RETIREMENT FUND#13 · 590,761 sh	590,761	$2.2M	<0.01%	0.0%
14	MILLENNIUM MANAGEMENT#14 · 579,599 sh	579,599	$2.1M	<0.01%	+24.3%
15	JACOBS LEVY EQUITY MANAGEMENT#15 · 566,863 sh	566,863	$2.1M	<0.01%	+94.2%
16	Uniplan Investment Counsel#16 · 560,353 sh	560,353	$2.0M	0.19%	+50.9%
17	CITADEL ADVISORS#17 · 551,246 sh	551,246	$2.0M	<0.01%	-21.8%
18	ROYCE & ASSOCIATES#18 · 551,010 sh	551,010	$2.0M	0.02%	-17.5%
19	VANGUARD PORTFOLIO MANAGEMENT#19 · 549,697 sh	549,697	$2.0M	<0.01%	-6.4%
20	Legato Capital Management#20 · 512,039 sh	512,039	$1.9M	0.15%	0.0%
21	LSV ASSET MANAGEMENT#21 · 461,307 sh	461,307	$1.7M	<0.01%	-14.4%
22	BANK OF AMERICA#22 · 427,275 sh	427,275	$1.6M	<0.01%	-11.8%
23	RENAISSANCE TECHNOLOGIES#23 · 425,800 sh	425,800	$1.5M	<0.01%	-10.4%
24	MORGAN STANLEY#24 · 421,009 sh	421,009	$1.5M	<0.01%	+59.9%
25	DENALI ADVISORS#25 · 414,436 sh	414,436	$1.5M	0.15%	-5.1%
26	GOLDMAN SACHS GROUP#26 · 393,007 sh	393,007	$1.4M	<0.01%	-37.1%
27	TWO SIGMA INVESTMENTS#27 · 357,715 sh	357,715	$1.3M	<0.01%	-17.5%
28	CHARLES SCHWAB INVESTMENT MANAGEMENT#28 · 349,820 sh	349,820	$1.3M	<0.01%	+2.8%
29	NORTHERN#29 · 333,833 sh	333,833	$1.2M	<0.01%	-1.9%
30	VANGUARD FIDUCIARY#30 · 277,358 sh	277,358	$1.0M	<0.01%	+0.8%
31	Creative Planning#31 · 275,528 sh	275,528	$1.0M	<0.01%	+63.5%
32	SEGALL BRYANT & HAMILL#32 · 273,522 sh	273,522	$995.6K	0.01%	New
33	Bank of New York Mellon#33 · 265,684 sh	265,684	$967.1K	<0.01%	+3.5%
34	D. E. Shaw#34 · 264,900 sh	264,900	$964.2K	<0.01%	-42.0%
35	VICTORY CAPITAL MANAGEMENT#35 · 260,062 sh	260,062	$946.6K	<0.01%	-30.9%
36	AMERIPRISE FINANCIAL#36 · 193,368 sh	193,368	$703.9K	<0.01%	+5.4%
37	UBS Group AG#37 · 181,998 sh	181,998	$662.5K	<0.01%	+74.9%
38	STATE OF WISCONSIN INVESTMENT BOARD#38 · 164,400 sh	164,400	$598.4K	<0.01%	-7.5%
39	FIRST ADVISORS#39 · 159,509 sh	159,509	$580.6K	<0.01%	-0.5%
40	Man Group plc#40 · 157,348 sh	157,348	$572.7K	<0.01%	+66.5%
41	LOS ANGELES CAPITAL MANAGEMENT#41 · 145,060 sh	145,060	$528.0K	<0.01%	+110.0%
42	STRS OHIO#42 · 134,200 sh	134,200	$488.5K	<0.01%	+22.1%
43	Campbell & Investment Adviser#43 · 121,177 sh	121,177	$441.1K	0.02%	+31.5%
44	Invesco Ltd.#44 · 113,091 sh	113,091	$411.7K	0.00%	+1.4%
45	ALLIANCEBERNSTEIN L.P.#45 · 71,510 sh	71,510	$382.6K	<0.01%	+12.2%
46	PRUDENTIAL FINANCIAL#46 · 104,190 sh	104,190	$379.3K	<0.01%	+3.6%
47	SummerHaven Investment Management#47 · 101,025 sh	101,025	$367.7K	—	0.0%
48	Nuveen#48 · 100,899 sh	100,899	$367.3K	<0.01%	0.0%
49	MARTINGALE ASSET MANAGEMENT L P#49 · 92,341 sh	92,341	$336.1K	<0.01%	+0.1%
50	KLP KAPITALFORVALTNING AS#50 · 87,200 sh	87,200	$317.4K	<0.01%	0.0%
51	PRICE T ROWE ASSOCIATES#51 · 83,763 sh	83,763	$305.0K	0.00%	+32.2%
52	Vanguard Global Advisers#52 · 83,009 sh	83,009	$302.2K	<0.01%	-8.6%
53	WINTON GROUP Ltd#53 · 75,647 sh	75,647	$275.4K	<0.01%	-39.2%
54	WEALTH ENHANCEMENT ADVISORY SERVICES#54 · 74,155 sh	74,155	$266.2K	—	+11.2%
55	Empirical Financial Services, d.b.a. Empirical Wealth Ma#55 · 70,772 sh	70,772	$257.6K	—	+31.8%
56	Connor, Clark & Lunn Investment Management Ltd.#56 · 69,708 sh	69,708	$253.7K	<0.01%	+93.3%
57	CANADA PENSION PLAN INVESTMENT BOARD#57 · 69,400 sh	69,400	$252.6K	<0.01%	0.0%
58	Inspire Advisors#58 · 68,789 sh	68,789	$250.4K	0.02%	+68.5%
59	Schonfeld Strategic Advisors#59 · 67,581 sh	67,581	$246.0K	<0.01%	+163.5%
60	Cambria Investment Management, L.P.#60 · 65,033 sh	65,033	$236.7K	0.01%	+54.5%
61	EXCHANGE TRADED CONCEPTS#61 · 63,144 sh	63,144	$229.8K	—	+34.7%
62	XTX Topco Ltd#62 · 62,668 sh	62,668	$228.1K	<0.01%	New
63	LEUCADIA NATIONAL#63 · 62,667 sh	62,667	$228.1K	<0.01%	0.0%
64	EntryPoint Capital#64 · 60,349 sh	60,349	$219.7K	0.05%	+58.0%
65	FMR#65 · 58,858 sh	58,858	$214.2K	0.00%	+151.5%
66	Point72 Asset Management, L.P.#66 · 58,212 sh	58,212	$211.9K	<0.01%	+54.3%
67	Atom Investors#67 · 57,464 sh	57,464	$209.2K	0.02%	New
68	SUSQUEHANNA INTERNATIONAL GROUP, LLP#68 · 53,314 sh	53,314	$194.1K	0.00%	+115.3%
69	Squarepoint Ops#69 · 51,040 sh	51,040	$185.8K	<0.01%	-12.9%
70	RHUMBLINE ADVISERS#70 · 50,413 sh	50,413	$183.5K	<0.01%	-1.4%
71	Strategic Blueprint#71 · 50,065 sh	50,065	$182.2K	—	+0.1%
72	DAVENPORT#72 · 50,000 sh	50,000	$182.0K	—	0.0%
73	Abel Hall#73 · 45,563 sh	45,563	$165.8K	—	New
74	Russell Investments Group, Ltd.#74 · 44,055 sh	44,055	$160.4K	<0.01%	+17.0%
75	Empowered Funds#75 · 43,615 sh	43,615	$158.8K	<0.01%	+43.9%
76	Cresset Asset Management#76 · 40,690 sh	40,690	$148.1K	<0.01%	0.0%
77	VIKING FUND MANAGEMENT#77 · 40,000 sh	40,000	$145.6K	—	New
78	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO#78 · 38,800 sh	38,800	$141.2K	<0.01%	+116.8%
79	DEUTSCHE BANK AG\#79 · 37,870 sh	37,870	$137.8K	0.00%	+1.9%
80	TUDOR INVESTMENT ET AL#80 · 37,237 sh	37,237	$135.5K	<0.01%	New
81	WELLS FARGO & COMPANY#81 · 35,399 sh	35,399	$128.9K	0.00%	+135.4%
82	Quantinno Capital Management#82 · 32,642 sh	32,642	$118.8K	<0.01%	+3.3%
83	SEI INVESTMENTS#83 · 28,520 sh	28,520	$103.8K	<0.01%	-41.1%
84	CITIGROUP#84 · 28,411 sh	28,411	$103.4K	0.00%	+64.5%
85	GUGGENHEIM CAPITAL#85 · 26,935 sh	26,935	$98.0K	<0.01%	+32.2%
86	JPMORGAN CHASE#86 · 26,723 sh	26,723	$96.5K	0.00%	+6.1%
87	WASHINGTON GROWTH STRATEGIES#87 · 26,216 sh	26,216	$95.4K	—	0.0%
88	CIM INVESTMENT MANAGEMENT#88 · 26,150 sh	26,150	$95.2K	0.02%	+7.3%
89	IEQ CAPITAL#89 · 26,000 sh	26,000	$94.6K	<0.01%	+92.1%
90	Significant Wealth Partners#90 · 25,192 sh	25,192	$91.7K	0.10%	+8.9%
91	CIBC Bancorp USA#91 · 23,650 sh	23,650	$86.1K	<0.01%	+1.1%
92	Cerity Partners#92 · 23,036 sh	23,036	$83.9K	<0.01%	+113.5%
93	Aquatic Capital Management#93 · 22,766 sh	22,766	$82.9K	<0.01%	+1541.4%
94	MetLife Investment Management#94 · 21,880 sh	21,880	$79.6K	<0.01%	+86.1%
95	MIRAE ASSET GLOBAL ETFS Ltd.#95 · 19,464 sh	19,464	$70.8K	<0.01%	-0.3%
96	MERCER GLOBAL ADVISORS#96 · 19,170 sh	19,170	$69.8K	<0.01%	+1.5%
97	October Effect Ltd#97 · 19,000 sh	19,000	$69.2K	—	-6.4%
98	Mariner#98 · 18,523 sh	18,523	$67.4K	<0.01%	-11.9%
99	OneAscent Financial Services#99 · 18,198 sh	18,198	$66.2K	<0.01%	+79.6%
100	ENVESTNET ASSET MANAGEMENT#100 · 18,040 sh	18,040	$65.7K	0.00%	+49.7%

Funds that sold out of SIGA in Q2 2026 (35)

Held SIGA at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held SIGA in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
HRT FINANCIAL360,067 sh	360,067	$1.9M
NOMURA ASSET MANAGEMENT INTERNATIONAL244,853 sh	244,853	$1.3M
MACQUARIE GROUP LTD244,853 sh	244,853	$1.3M
ACADIAN ASSET MANAGEMENT188,484 sh	188,484	$1.0M
O'SHAUGHNESSY ASSET MANAGEMENT107,138 sh	107,138	$573.2K
Trexquant Investment93,440 sh	93,440	$499.9K
JAMES INVESTMENT RESEARCH53,546 sh	53,546	$286.5K
JANE STREET GROUP52,080 sh	52,080	$278.6K
Vestcor41,200 sh	41,200	$220.0K
Graham Capital Management, L.P.29,907 sh	29,907	$160.0K
MIRABELLA FINANCIAL SERVICES LLP26,812 sh	26,812	$143.4K
Engineers Gate Manager25,996 sh	25,996	$139.1K
LAZARD ASSET MANAGEMENT24,519 sh	24,519	$131.2K
EP Wealth Advisors19,127 sh	19,127	$102.3K
Kestra Advisory Services16,100 sh	16,100	$86.1K
Vanguard Personalized Indexing Management15,868 sh	15,868	$84.9K
Corient Private Wealth14,064 sh	14,064	$75.2K
GLOBEFLEX CAPITAL L P13,104 sh	13,104	$70.1K
QUADRANT CAPITAL GROUP6,480 sh	6,480	$66.3K
CURIO WEALTH2,000 sh	2,000	$10.7K
Private Wealth Asset Management1,700 sh	1,700	$9.1K
MAI Capital Management1,234 sh	1,234	$6.6K
GAMMA Investing358 sh	358	$1.9K
Optiver Holding B.V.322 sh	322	$1.7K
Basecamp Wealth Advisors119 sh	119	$637.00
Versant Capital Management108 sh	108	$578.00
Bell Investment Advisors75 sh	75	$402.00
Root Financial Partners64 sh	64	$342.00
Larson Financial Group47 sh	47	$251.00
Sound Income Strategies41 sh	41	$212.00
Triumph Capital Management25 sh	25	$134.00
JPL Wealth Management23 sh	23	$124.00
Golden State Equity Partners13 sh	13	$69.00
True Wealth Design2 sh	2	$11.00
Avion Wealth108 sh	108	$0.00

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.