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GROUP ONE TRADING LLC

Position in SIGA — Siga Technologies Inc

CIK 932540 CHICAGO, IL

Position in SIGA

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$3,028
-$13,985 QoQ
Shares Held
832
-73.8% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#140
of 160 holders
Holding Since
Mar 2020
16 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in SIGA Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Jun 30, 2026

GROUP ONE TRADING LLC holds $38,914,322 across 31 Drug Manufacturers - Specialty & Generic names. SIGA ranks #22 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in SIGA

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16 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $3,028 832
2026-03-31 $17,013 3,180
2025-12-31 $21,965 3,595
2025-09-30 $27,404 2,995
2025-06-30 $14,943 2,292
2024-12-31 $215,320 35,827
2024-09-30 $84,017 12,447
2024-03-31 $284,791 33,270
2023-12-31 $337,064 60,190
2023-09-30 $405,851 77,305
2022-06-30 $152,902 13,204
2022-03-31 $76,330 10,766
2021-12-31 $85,359 11,351
2020-12-31 $33,194 4,566
2020-09-30 $3,888 566
2020-03-31 $8,709 1,822