Siga Technologies Inc: which funds bought and sold

Institutions that bought and sold Siga Technologies shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 95 institutions that filed 13F reports for both quarters added to or opened positions in Siga Technologies, and 80 cut or closed them. Together they added a net 701K shares, +2.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 84K shares (−0.8%); index fund managers were net buyers of 865K shares (+9.5%). 15 opened a new position and 34 sold out entirely.

Bought, Q2 2026 95 institutions, 15 of them new holders Sold, Q2 2026 80 institutions, 34 of them sold out

Net change, all compared +701K shares (+2.0%)

Net change, active managers −84K shares (−0.8%), 16 bought, 18 sold

Buyers versus sellers

institutions compared, 193

95 bought 18 80 sold

Active managers and hedge funds 16 bought · 18 sold · −84K

Index fund managers 5 bought · 5 sold · +865K

Other institutions 74 bought · 57 sold · −81K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+692K +19.8%	4.2M	$15.2M
First Wilshire Securities Management Inc	+449K +50.5%	1.3M	$4.9M
Qube Research & Technologies Ltd Hedge fund	+326K +78.5%	741K	$2.7M
Jacobs Levy Equity Management, Inc Active manager	+275K +94.2%	567K	$2.1M
Uniplan Investment Counsel, Inc.	+189K +50.9%	560K	$2M
American Century Companies Inc Active manager	+188K +14.3%	1.5M	$5.5M
Morgan Stanley	+158K +59.9%	421K	$1.5M
State Street Corp Index funds	+122K +12.1%	1.1M	$4.1M
Millennium Management LLC Hedge fund	+113K +24.3%	580K	$2.1M
Creative Planning	+107K +63.5%	276K	$1M
Geode Capital Management, LLC Index funds	+102K +7.7%	1.4M	$5.2M
Hotchkis & Wiley Capital Management LLC Active manager	+87K +10.5%	914K	$3.3M
UBS Group AG	+78K +74.9%	182K	$662,473
Los Angeles Capital Management LLC Active manager	+76K +110.0%	145K	$528,019
Man Group PLC Hedge fund	+63K +66.5%	157K	$572,747
Xtx Topco Ltd	+63K New position	63K	$228,112
Atom Investors LP	+57K New position	57K	$209,169
Abel Hall, LLC	+46K New position	46K	$165,849
Schonfeld Strategic Advisors LLC Hedge fund	+42K +163.5%	68K	$245,994
Viking Fund Management LLC	+40K New position	40K	$145,600

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Qube Research & Technologies Ltd Hedge fund	+326K +78.5%	741K	$2.7M
Jacobs Levy Equity Management, Inc Active manager	+275K +94.2%	567K	$2.1M
American Century Companies Inc Active manager	+188K +14.3%	1.5M	$5.5M
Millennium Management LLC Hedge fund	+113K +24.3%	580K	$2.1M
Hotchkis & Wiley Capital Management LLC Active manager	+87K +10.5%	914K	$3.3M
Los Angeles Capital Management LLC Active manager	+76K +110.0%	145K	$528,019
Man Group PLC Hedge fund	+63K +66.5%	157K	$572,747
Schonfeld Strategic Advisors LLC Hedge fund	+42K +163.5%	68K	$245,994
Tudor Investment Corp Et Al Hedge fund	+37K New position	37K	$135,543
FMR LLC Active manager	+35K +151.5%	59K	$214,243

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
HRT Financial LP	−360K Sold out	0	—
Macquarie Group Ltd	−245K Sold out	0	—
Nomura Asset Management International Inc.	−245K Sold out	0	—
Goldman Sachs Group Inc	−232K −37.1%	393K	$1.4M
D. E. Shaw & Co., Inc. Hedge fund	−191K −42.0%	265K	$964,236
Acadian Asset Management LLC Active manager	−188K Sold out	0	—
Citadel Advisors LLC Hedge fund	−154K −21.8%	551K	$2M
State Board Of Administration Of Florida Retirement System	−118K −89.9%	13K	$48,630
Royce & Associates LP Active manager	−117K −17.5%	551K	$2M
Victory Capital Management Inc Active manager	−117K −30.9%	260K	$946,626
O'Shaughnessy Asset Management, LLC Active manager	−107K Sold out	0	—
Altravue Capital, LLC	−105K −4.3%	2.3M	$8.5M
Trexquant Investment LP Hedge fund	−93K Sold out	0	—
LSV Asset Management Active manager	−77K −14.4%	461K	$1.7M
Two Sigma Investments, LP Hedge fund	−76K −17.5%	358K	$1.3M
State Of Wyoming	−70K −82.0%	15K	$55,874
Bank Of America Corp	−57K −11.8%	427K	$1.6M
James Investment Research, Inc.	−54K Sold out	0	—
Jane Street Group, LLC	−52K Sold out	0	—
Arrowstreet Capital, Limited Partnership Hedge fund	−51K −3.4%	1.5M	$5.4M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
D. E. Shaw & Co., Inc. Hedge fund	−191K −42.0%	265K	$964,236
Acadian Asset Management LLC Active manager	−188K Sold out	0	—
Citadel Advisors LLC Hedge fund	−154K −21.8%	551K	$2M
Royce & Associates LP Active manager	−117K −17.5%	551K	$2M
Victory Capital Management Inc Active manager	−117K −30.9%	260K	$946,626
O'Shaughnessy Asset Management, LLC Active manager	−107K Sold out	0	—
Trexquant Investment LP Hedge fund	−93K Sold out	0	—
LSV Asset Management Active manager	−77K −14.4%	461K	$1.7M
Two Sigma Investments, LP Hedge fund	−76K −17.5%	358K	$1.3M
Arrowstreet Capital, Limited Partnership Hedge fund	−51K −3.4%	1.5M	$5.4M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Xtx Topco Ltd	63K	$228,112
Atom Investors LP	57K	$209,169
Abel Hall, LLC	46K	$165,849
Viking Fund Management LLC	40K	$145,600
Tudor Investment Corp Et AlHedge fund	37K	$135,543
Stifel Financial Corp	15K	$55,318
R Squared Ltd	15K	$53,847
Intech Investment Management LLCActive manager	11K	$41,358
Voya Investment Management LLC	10K	$36,735
Integrated Wealth Concepts LLC	925	$3,367

Sold out

largest by value

Institution	Shares	Value March 31, 2026
HRT Financial LP	360K	$1.9M
Nomura Asset Management International Inc.	245K	$1.3M
Macquarie Group Ltd	245K	$1.3M
Acadian Asset Management LLCActive manager	188K	$1M
O'Shaughnessy Asset Management, LLCActive manager	107K	$573,188
Trexquant Investment LPHedge fund	93K	$499,904
James Investment Research, Inc.	54K	$286,471
Jane Street Group, LLC	52K	$278,628
Vestcor Inc	41K	$220,000
Graham Capital Management, L.P.Hedge fund	30K	$160,002

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 161
Ten largest holders: 54.7%
Index fund managers: 28.7%
Active managers and hedge funds: 31.9%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	16	18	2	6	−84K	−0.8%
Index fund managers	5	5	0	1	+865K	+9.5%
Other institutions	74	57	13	27	−81K	−0.6%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Siga Technologies.

Only managers that filed a holdings report for both quarters are compared (193 here). 6 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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