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SIGA · Siga Technologies Inc

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$3.04 +0.07 (+2.36%) At close · Aug 21
Market Cap
$218.42M
Shares
71.85M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 161
Total Value: $126,982,944
Total Shares: 34,885,452

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 161 13F filers · Δ vs Mar 31, 2026
Top Holder
12.0%
Sep 2023 → Jun 2026 · range 10.0% – 12.5%
+1.8 pts
Top 5
35.7%
Sep 2023 → Jun 2026 · range 34.5% – 41.0%
+1.2 pts
Top 10
54.6%
Sep 2023 → Jun 2026 · range 49.0% – 63.2%
+3.4 pts
HHI
415
Sep 2023 → Jun 2026 · range 361 – 523
Broadly held+45

Quarterly Activity

vs Mar 31, 2026
New
17
Increased
80
Decreased
46
Sold Out
39
Unchanged
18
Holder count: -22
Institutional value: -31.0%
Shares held: +1.4%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 163
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1010086 CUSIP 826917106 13F (30d) 142 filings 142 filers Visit website Investor relations