SIGA Technologies, Inc.
US ˙ NasdaqGM ˙ US8269171067

SecuritySIGA / SIGA Technologies, Inc.
InstitutionInvesco Ltd.
Latest Disclosed Ownership111,518 shares
Latest Disclosed Value $ 596,622
Invesco Ltd. reports 1.69% decrease in ownership of SIGA / SIGA Technologies, Inc.

On May 12, 2026 - Invesco Ltd. filed a 13F-HR form disclosing ownership of 111,518 shares of SIGA Technologies, Inc. (US:SIGA) valued at $596,621 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 19, 2026 disclosing 113,437 shares of SIGA Technologies, Inc.. This represents a change in shares of -1.69% during the quarter. The current value of the position is $479,527 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F SIGA TECHNOLOGIES COM 826917106 111,518 -1,919 -1.69 597 -14.00 0.0000
2026-02-19 2025-12-31 13F SIGA TECHNOLOGIES COM 826917106 113,437 8,162 7.75 693 -28.04 0.0001
2025-11-13 2025-09-30 13F SIGA TECHNOLOGIES COM 826917106 105,275 -4,353 -3.97 963 34.87 0.0002
2025-08-13 2025-06-30 13F SIGA TECHNOLOGIES COM 826917106 109,628 -11,146 -9.23 715 8.02 0.0001
2025-05-12 2025-03-31 13F SIGA TECHNOLOGIES COM 826917106 120,774 -506 -0.42 662 -9.20 0.0001
2025-02-13 2024-12-31 13F SIGA TECHNOLOGIES COM 826917106 121,280 -12,468 -9.32 729 -19.29 0.0001
2024-11-12 2024-09-30 13F SIGA TECHNOLOGIES COM 826917106 133,748 -53,233 -28.47 903 -36.43 0.0002
2024-08-13 2024-06-30 13F SIGA TECHNOLOGIES COM 826917106 186,981 2,712 1.47 1,419 -10.02 0.0003
2024-05-14 2024-03-31 13F SIGA TECHNOLOGIES COM 826917106 184,269 100,101 118.93 1,577 234.82 0.0003
2024-02-13 2023-12-31 13F SIGA TECHNOLOGIES COM 826917106 84,168 -3,737 -4.25 471 2.17 0.0001
2023-11-13 2023-09-30 13F SIGA TECHNOLOGIES COM 826917106 87,905 1,696 1.97 462 5.98 0.0001
2023-08-11 2023-06-30 13F SIGA TECHNOLOGIES COM 826917106 86,209 -26,460 -23.48 435 -32.77 0.0001
2023-05-12 2023-03-31 13F SIGA TECHNOLOGIES COM 826917106 112,669 11,789 11.69 648 -12.80 0.0002
2023-02-13 2022-12-31 13F SIGA TECHNOLOGIES COM 826917106 100,880 637 0.64 742 -28.17 0.0002
2022-11-14 2022-09-30 13F SIGA TECHNOLOGIES COM 826917106 100,243 -119,246 -54.33 1,033 -59.36 0.0003
2022-08-15 2022-06-30 13F SIGA TECHNOLOGIES COM 826917106 219,489 130,691 147.18 2,542 303.49 0.0008
2022-05-16 2022-03-31 13F SIGA TECHNOLOGIES COM 826917106 88,798 9,241 11.62 630 5.35 0.0002
2022-02-14 2021-12-31 13F SIGA TECHNOLOGIES COM 826917106 79,557 7,768 10.82 598 12.83 0.0001
2021-11-15 2021-09-30 13F SIGA TECHNOLOGIES COM 826917106 71,789 4,951 7.41 530 26.49 0.0001
2021-08-17 2021-06-30 13F SIGA TECHNOLOGIES COM 826917106 66,838 947 1.44 419 -2.10 0.0001
2021-05-17 2021-03-31 13F SIGA TECHNOLOGIES COM 826917106 65,891 25,087 61.48 428 44.11 0.0001
2021-02-16 2020-12-31 13F SIGA TECHNOLOGIES COM 826917106 40,804 4,321 11.84 297 18.80 0.0001
2020-11-16 2020-09-30 13F SIGA TECHNOLOGIES COM 826917106 36,483 -8,265 -18.47 250 -5.30 0.0001
2020-08-14 2020-06-30 13F SIGA TECHNOLOGIES COM 826917106 44,748 -3,789 -7.81 264 13.79 0.0001
2020-05-15 2020-03-31 13F SIGA TECHNOLOGIES COM 826917106 48,537 5,878 13.78 232 13.73 0.0001
2020-02-14 2019-12-31 13F SIGA TECHNOLOGIES COM 826917106 42,659 25,903 154.59 204 137.21 0.0001
2019-11-14 2019-09-30 13F SIGA TECHNOLOGIES COM 826917106 16,756 16,756 86 0.0000
2019-05-15 2019-03-31 13F SIGA TECHNOLOGIES COM 826917106 0 -570,803 -100.00 0 -100.00
2019-02-14 2018-12-31 13F SIGA TECHNOLOGIES COM 826917106 570,803 556,965 4,024.90 4,509 4,646.32 0.0017
2018-11-14 2018-09-30 13F SIGA TECHNOLOGIES COM 826917106 13,838 13,838 95 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.