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ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

Position in SIGA — Siga Technologies Inc

CIK 1164508 BOSTON, MA

Position in SIGA

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$5,368,333
-$2,795,553 QoQ
Shares Held
1,474,817
-3.4% QoQ
Ownership
2.05%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#6
of 160 holders
Holding Since
Jun 2020
22 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

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $921,160,135 across 28 Drug Manufacturers - Specialty & Generic names. SIGA ranks #17 (0.6% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in SIGA

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22 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $5,368,333 1,474,817
2026-03-31 $8,163,886 1,525,960
2025-12-31 $6,263,238 1,025,080
2025-09-30 $7,637,349 834,683
2025-06-30 $3,773,652 578,781
2025-03-31 $3,251,136 593,273
2024-12-31 $2,594,955 431,773
2024-09-30 $5,446,116 806,832
2024-06-30 $4,559,609 600,739
2024-03-31 $5,029,624 587,573
2023-03-31 $1,079,390 187,720
2022-12-31 $4,728,159 642,413
2022-09-30 $695,868 67,560
2022-06-30 $387,038 33,423
2022-03-31 $494,584 69,758
2021-12-31 $1,753,122 233,128
2021-09-30 $2,549,801 345,034
2021-06-30 $4,399,981 700,634
2021-03-31 $3,887,032 598,005
2020-12-31 $4,515,549 621,121
2020-09-30 $3,971,794 578,136
2020-06-30 $3,040,819 514,521