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, 2026ARROWSTREET 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 |
|---|---|---|---|---|---|
| 1 | ZTS |
Zoetis Inc.
|
3,137,442 | $225,456,582 | |
| 2 | VTRS |
Viatris Inc
|
8,371,218 | $132,934,941 | |
| 3 | HLN |
Haleon plc
|
14,181,817 | $132,316,352 | |
| 4 | INDV |
Indivior Pharmaceuticals, Inc.
|
1,642,086 | $67,374,788 | |
| 5 | KNSA |
Kiniksa Pharmaceuticals International, plc
|
957,514 | $61,233,020 | |
| 6 | TAK |
Takeda Pharmaceutical Co Ltd
|
3,732,924 | $59,838,771 | |
| 7 | ANIP |
Ani Pharmaceuticals Inc
|
562,016 | $46,523,684 | |
| 8 | ELAN |
Elanco Animal Health Inc
|
1,872,157 | $46,073,783 |
All Filings in SIGA
Export CSV
22 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $5,368,333 | 1,474,817 | Shares | Defined | 2026-08-13 | |
| 2026-03-31 | $8,163,886 | 1,525,960 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $6,263,238 | 1,025,080 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $7,637,349 | 834,683 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $3,773,652 | 578,781 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $3,251,136 | 593,273 | Shares | Defined | 2025-05-14 | |
| 2024-12-31 | $2,594,955 | 431,773 | Shares | Defined | 2025-02-12 | |
| 2024-09-30 | $5,446,116 | 806,832 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $4,559,609 | 600,739 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $5,029,624 | 587,573 | Shares | Defined | 2024-05-15 | |
| 2023-03-31 | $1,079,390 | 187,720 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $4,728,159 | 642,413 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $695,868 | 67,560 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $387,038 | 33,423 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $494,584 | 69,758 | Shares | Defined | 2022-05-13 | |
| 2021-12-31 | $1,753,122 | 233,128 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $2,549,801 | 345,034 | Shares | Defined | 2021-11-12 | |
| 2021-06-30 | $4,399,981 | 700,634 | Shares | Defined | 2021-08-13 | |
| 2021-03-31 | $3,887,032 | 598,005 | Shares | Defined | 2021-05-14 | |
| 2020-12-31 | $4,515,549 | 621,121 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $3,971,794 | 578,136 | Shares | Defined | 2020-11-12 | |
| 2020-06-30 | $3,040,819 | 514,521 | Shares | Defined | 2020-08-12 | |
| No filing history on record for this holder in this stock. | ||||||