Siga Technologies (SIGA)
Siga Technologies on one page: short interest, daily short volume, fails to deliver, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as pharmaceutical preparations.
3.6M
Short interest
settlement 2026-10-15
6.4
Days to cover
+1.2 days vs prior
36.4%
Short share of volume
2026-11-02
2
Fails to deliver
settlement 2026-10-05
Thu 5 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in SIGA is 3,563,320 shares, down 166,672 shares over the last month. Over the last 48 readings it ranged from 2,724,653 shares (31 July 2025) to 4,571,567 shares (31 October 2024). At the reported average volume of 561K shares a day that is 6.4 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 3,563,320 | -1.0% | 560,644 | 6.36 |
| 2026-09-30 | 3,600,907 | -3.5% | 690,659 | 5.21 |
| 2026-09-15 | 3,729,992 | +5.0% | 677,492 | 5.51 |
| 2026-08-31 | 3,550,706 | -7.6% | 739,867 | 4.80 |
| 2026-08-14 | 3,841,394 | +4.0% | 582,391 | 6.60 |
| 2026-07-31 | 3,692,365 | -6.1% | 956,517 | 3.86 |
| 2026-07-15 | 3,932,494 | +13.5% | 570,438 | 6.89 |
| 2026-06-30 | 3,464,782 | +1.6% | 761,969 | 4.55 |
| 2026-06-15 | 3,410,109 | -4.5% | 362,119 | 9.42 |
| 2026-05-29 | 3,568,868 | +7.7% | 538,124 | 6.63 |
| 2026-05-15 | 3,313,595 | -0.7% | 541,915 | 6.11 |
| 2026-04-30 | 3,337,368 | +3.1% | 408,762 | 8.16 |
| 2026-04-15 | 3,237,447 | -7.0% | 894,739 | 3.62 |
| 2026-03-31 | 3,481,817 | +10.6% | 856,891 | 4.06 |
| 2026-03-13 | 3,148,198 | -6.7% | 733,085 | 4.29 |
| 2026-02-27 | 3,374,883 | +1.2% | 481,874 | 7.00 |
| 2026-02-13 | 3,333,490 | +4.8% | 369,246 | 9.03 |
| 2026-01-30 | 3,179,185 | -5.6% | 310,268 | 10.25 |
| 2026-01-15 | 3,369,074 | +5.6% | 366,709 | 9.19 |
| 2025-12-31 | 3,190,557 | -0.3% | 317,145 | 10.06 |
| 2025-12-15 | 3,201,535 | -1.8% | 350,174 | 9.14 |
| 2025-11-28 | 3,260,435 | +4.6% | 376,779 | 8.65 |
| 2025-11-14 | 3,118,171 | +10.2% | 552,495 | 5.64 |
| 2025-10-31 | 2,830,525 | +3.4% | 322,585 | 8.77 |
| 2025-10-15 | 2,737,982 | -0.1% | 396,668 | 6.90 |
| 2025-09-30 | 2,739,845 | -4.1% | 473,827 | 5.78 |
| 2025-09-15 | 2,856,956 | +3.1% | 551,707 | 5.18 |
| 2025-08-29 | 2,770,866 | +0.8% | 484,026 | 5.72 |
| 2025-08-15 | 2,747,884 | +0.8% | 799,205 | 3.44 |
| 2025-07-31 | 2,724,653 | -1.2% | 324,882 | 8.39 |
| 2025-07-15 | 2,758,881 | -4.9% | 333,124 | 8.28 |
| 2025-06-30 | 2,902,079 | -5.2% | 406,604 | 7.14 |
| 2025-06-13 | 3,061,082 | +0.3% | 446,103 | 6.86 |
| 2025-05-30 | 3,050,736 | -15.9% | 408,800 | 7.46 |
| 2025-05-15 | 3,628,966 | -12.6% | 479,704 | 7.57 |
| 2025-04-30 | 4,151,197 | -0.0% | 621,607 | 6.68 |
| 2025-04-15 | 4,151,621 | +3.9% | 662,955 | 6.26 |
| 2025-03-31 | 3,997,613 | +4.7% | 368,384 | 10.85 |
| 2025-03-14 | 3,817,679 | -6.9% | 533,897 | 7.15 |
| 2025-02-28 | 4,099,331 | +28.5% | 568,247 | 7.21 |
| 2025-02-14 | 3,190,200 | -9.4% | 390,372 | 8.17 |
| 2025-01-31 | 3,519,852 | +3.6% | 315,480 | 11.16 |
| 2025-01-15 | 3,398,732 | -2.6% | 417,127 | 8.15 |
| 2024-12-31 | 3,488,175 | -0.8% | 445,525 | 7.83 |
| 2024-12-13 | 3,517,936 | -5.0% | 543,691 | 6.47 |
| 2024-11-29 | 3,704,141 | +4.9% | 534,689 | 6.93 |
| 2024-11-15 | 3,531,132 | -22.8% | 575,145 | 6.14 |
| 2024-10-31 | 4,571,567 | -7.3% | 423,481 | 10.80 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of SIGA volume is 36.4%, down 11.2 points over the last five sessions. Over the last 30 readings it ranged from 17.5% (29 October 2026) to 66.9% (28 September 2026). The latest reading is 8.4 points below the 30-session average of 44.8%, on 321K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 117K | 321K | 36.4% | 7,473 |
| 2026-10-30 | 86K | 233K | 36.8% | 169 |
| 2026-10-29 | 32K | 180K | 17.5% | 1,600 |
| 2026-10-28 | 94K | 285K | 33.0% | 200 |
| 2026-10-27 | 50K | 176K | 28.5% | 0 |
| 2026-10-26 | 70K | 148K | 47.6% | 200 |
| 2026-10-23 | 94K | 198K | 47.8% | 0 |
| 2026-10-22 | 39K | 73K | 53.5% | 0 |
| 2026-10-21 | 42K | 92K | 45.3% | 7 |
| 2026-10-20 | 28K | 62K | 44.7% | 0 |
| 2026-10-19 | 54K | 153K | 35.2% | 400 |
| 2026-10-16 | 102K | 491K | 20.7% | 0 |
| 2026-10-15 | 113K | 315K | 35.9% | 0 |
| 2026-10-14 | 52K | 101K | 51.5% | 1,496 |
| 2026-10-13 | 46K | 117K | 39.3% | 0 |
| 2026-10-12 | 47K | 131K | 36.0% | 0 |
| 2026-10-09 | 90K | 181K | 49.5% | 0 |
| 2026-10-08 | 95K | 161K | 59.2% | 9 |
| 2026-10-07 | 43K | 106K | 40.7% | 0 |
| 2026-10-06 | 122K | 243K | 50.0% | 696 |
| 2026-10-05 | 151K | 321K | 47.1% | 0 |
| 2026-10-02 | 96K | 144K | 66.9% | 0 |
| 2026-10-01 | 82K | 173K | 47.2% | 0 |
| 2026-09-30 | 168K | 284K | 59.0% | 0 |
| 2026-09-29 | 60K | 117K | 51.0% | 0 |
| 2026-09-28 | 165K | 246K | 66.9% | 5 |
| 2026-09-25 | 197K | 409K | 48.1% | 0 |
| 2026-09-24 | 245K | 467K | 52.4% | 0 |
| 2026-09-23 | 64K | 133K | 48.2% | 81 |
| 2026-09-22 | 102K | 209K | 48.8% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 5 October 2026, the fails-to-deliver balance in SIGA is 2 shares, down 398 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (26 August 2026) to 54,718 shares (31 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-05 | 2 | $3.38 | $7 |
| 2026-09-22 | 400 | $3.16 | $1K |
| 2026-09-18 | 2,135 | $3.05 | $7K |
| 2026-09-17 | 20,669 | $3.10 | $64K |
| 2026-09-08 | 1,793 | $3.29 | $6K |
| 2026-09-04 | 3,288 | $3.23 | $11K |
| 2026-09-02 | 65 | $3.24 | $211 |
| 2026-08-31 | 54,718 | $3.06 | $167K |
| 2026-08-26 | 1 | $3.04 | $3 |
| 2026-08-25 | 27 | $2.94 | $79 |
| 2026-08-21 | 7,826 | $2.97 | $23K |
| 2026-08-19 | 2,406 | $2.99 | $7K |
| 2026-08-14 | 267 | $2.88 | $769 |
| 2026-08-13 | 29 | $2.87 | $83 |
| 2026-08-11 | 1,242 | $2.93 | $4K |
| 2026-08-06 | 6,126 | $3.15 | $19K |
| 2026-08-03 | 4,966 | $3.27 | $16K |
| 2026-07-30 | 1,812 | $3.34 | $6K |
| 2026-07-17 | 641 | $3.56 | $2K |
| 2026-07-01 | 27 | $3.64 | $98 |
| 2026-06-23 | 54 | $4.33 | $234 |
| 2026-06-04 | 144 | $4.29 | $618 |
| 2026-05-20 | 172 | $4.37 | $752 |
| 2026-05-06 | 13 | $4.64 | $60 |
| 2026-05-01 | 6,591 | $4.60 | $30K |
| 2026-04-10 | 845 | $4.40 | $4K |
| 2026-04-06 | 4,061 | $5.24 | $21K |
| 2026-04-01 | 108 | $5.35 | $578 |
| 2026-03-31 | 227 | $5.26 | $1K |
| 2026-03-26 | 4 | $4.99 | $20 |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for SIGA in the last 90 days. The most recent filings are listed below. Latest filing: Nabel Gary J. (Director) on 2026-06-09.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-06-09 | Nabel Gary J. | Director | Returned to company | 7K | $4.39 | $32K | 74K |
| 2026-06-09 | Nabel Gary J. | Director | Exercise or conversion | 24K | price not stated in the filing | not stated | 81K |
| 2026-06-09 | DURNAN JAYMIE A | Director | Returned to company | 7K | $4.39 | $32K | 89K |
| 2026-06-09 | DURNAN JAYMIE A | Director | Exercise or conversion | 24K | price not stated in the filing | not stated | 96K |
| 2026-06-09 | Nemirovsky Julian | Director | Exercise or conversion | 24K | price not stated in the filing | not stated | 81K |
| 2026-06-09 | Nemirovsky Julian | Director | Returned to company | 7K | $4.39 | $32K | 74K |
| 2026-06-09 | Phillips Holly L. | Director | Exercise or conversion | 24K | price not stated in the filing | not stated | 81K |
| 2026-06-09 | Phillips Holly L. | Director | Returned to company | 7K | $4.39 | $32K | 74K |
| 2026-06-09 | Ford Harold Eugene Jr. | Director | Exercise or conversion | 24K | price not stated in the filing | not stated | 55K |
| 2026-06-09 | Ford Harold Eugene Jr. | Director | Returned to company | 7K | $4.39 | $32K | 48K |
| 2026-06-09 | KEANE JOHN M | Director | Exercise or conversion | 24K | price not stated in the filing | not stated | 24K |
| 2026-06-09 | KEANE JOHN M | Director | Returned to company | 7K | $4.39 | $32K | 17K |
| 2026-06-09 | Marshall Joseph W III | Director | Returned to company | 7K | $4.39 | $32K | 247K |
| 2026-06-09 | Marshall Joseph W III | Director | Exercise or conversion | 24K | price not stated in the filing | not stated | 254K |
| 2026-03-25 | Miller Larry R. | General Counsel | Tax withholding | 4K | $4.99 | $18K | 52K |
| 2026-03-25 | Miller Larry R. | General Counsel | Exercise or conversion | 7K | $0.00 | $0 | 55K |
| 2026-03-13 | Nguyen Diem | Chief Executive Officer | Tax withholding | 47K | $5.26 | $247K | 139K |
| 2026-03-13 | Nguyen Diem | Chief Executive Officer | Exercise or conversion | 85K | $0.00 | $0 | 186K |
| 2026-03-13 | Miller Larry R. | General Counsel | Tax withholding | 11K | $5.26 | $59K | 49K |
| 2026-03-13 | Miller Larry R. | General Counsel | Exercise or conversion | 21K | $0.00 | $0 | 60K |
| 2026-03-13 | Luckshire Daniel J | Executive VP & CFO | Tax withholding | 6K | $5.26 | $32K | 280K |
| 2026-03-13 | Luckshire Daniel J | Executive VP & CFO | Exercise or conversion | 12K | $0.00 | $0 | 287K |
| 2026-03-13 | Hruby Dennis E | EVP & Chief Scientific Officer | Tax withholding | 4K | $5.26 | $21K | 199K |
| 2026-03-13 | Hruby Dennis E | EVP & Chief Scientific Officer | Exercise or conversion | 11K | $0.00 | $0 | 202K |
| 2026-01-27 | Nguyen Diem | Chief Executive Officer | Tax withholding | 23K | $6.82 | $156K | 101K |
| 2026-01-27 | Nguyen Diem | Chief Executive Officer | Exercise or conversion | 56K | $0.00 | $0 | 124K |
| 2025-07-01 | Luckshire Daniel J | Executive VP & CFO | Tax withholding | 12K | $6.49 | $80K | 275K |
| 2025-07-01 | Luckshire Daniel J | Executive VP & CFO | Exercise or conversion | 24K | $0.00 | $0 | 287K |
| 2025-07-01 | Hruby Dennis E | EVP & Chief Scientific Officer | Tax withholding | 10K | $6.49 | $68K | 191K |
| 2025-07-01 | Hruby Dennis E | EVP & Chief Scientific Officer | Exercise or conversion | 32K | $0.00 | $0 | 202K |
| 2025-06-10 | Nabel Gary J. | Director | Exercise or conversion | 19K | price not stated in the filing | not stated | 63K |
| 2025-06-10 | Nabel Gary J. | Director | Returned to company | 6K | $6.22 | $36K | 57K |
| 2025-06-10 | DURNAN JAYMIE A | Director | Returned to company | 6K | $6.22 | $36K | 72K |
| 2025-06-10 | DURNAN JAYMIE A | Director | Exercise or conversion | 19K | price not stated in the filing | not stated | 78K |
| 2025-06-10 | Marshall Joseph W III | Director | Exercise or conversion | 19K | price not stated in the filing | not stated | 235K |
| 2025-06-10 | Marshall Joseph W III | Director | Returned to company | 6K | $6.22 | $36K | 230K |
| 2025-06-10 | Phillips Holly L. | Director | Exercise or conversion | 19K | price not stated in the filing | not stated | 63K |
| 2025-06-10 | Phillips Holly L. | Director | Returned to company | 6K | $6.22 | $36K | 57K |
| 2025-06-10 | Nemirovsky Julian | Director | Returned to company | 6K | $6.22 | $36K | 57K |
| 2025-06-10 | Nemirovsky Julian | Director | Exercise or conversion | 19K | price not stated in the filing | not stated | 63K |
| 2025-06-10 | Ford Harold Eugene Jr. | Director | Returned to company | 6K | $6.22 | $36K | 31K |
| 2025-06-10 | Ford Harold Eugene Jr. | Director | Exercise or conversion | 19K | price not stated in the filing | not stated | 36K |
| 2025-04-18 | Miller Larry R. | General Counsel | Exercise or conversion | 7K | $0.00 | $0 | 42K |
| 2025-04-18 | Miller Larry R. | General Counsel | Tax withholding | 4K | $5.99 | $21K | 38K |
| 2025-03-25 | Miller Larry R. | General Counsel | Tax withholding | 3K | $5.89 | $16K | 35K |
| 2025-03-25 | Miller Larry R. | General Counsel | Exercise or conversion | 7K | $0.00 | $0 | 38K |
| 2025-01-27 | Nguyen Diem | Chief Executive Officer | Exercise or conversion | 56K | $0.00 | $0 | 91K |
| 2025-01-27 | Nguyen Diem | Chief Executive Officer | Tax withholding | 24K | $6.34 | $150K | 68K |
| 2024-10-25 | Nguyen Diem | Chief Executive Officer | Tax withholding | 24K | $6.77 | $162K | 35K |
| 2024-10-25 | Nguyen Diem | Chief Executive Officer | Exercise or conversion | 59K | $0.00 | $0 | 59K |
| 2024-07-01 | Luckshire Daniel J | Executive VP & CFO | Tax withholding | 12K | $7.55 | $93K | 263K |
| 2024-07-01 | Luckshire Daniel J | Executive VP & CFO | Exercise or conversion | 24K | $0.00 | $0 | 276K |
| 2024-07-01 | Hruby Dennis E | EVP & Chief Scientific Officer | Exercise or conversion | 32K | $0.00 | $0 | 180K |
| 2024-07-01 | Hruby Dennis E | EVP & Chief Scientific Officer | Tax withholding | 10K | $7.55 | $79K | 169K |
| 2024-06-11 | DURNAN JAYMIE A | Director | Returned to company | 7K | $7.86 | $58K | 59K |
| 2024-06-11 | DURNAN JAYMIE A | Director | Exercise or conversion | 25K | price not stated in the filing | not stated | 66K |
| 2024-06-11 | Ford Harold Eugene Jr. | Director | Exercise or conversion | 25K | price not stated in the filing | not stated | 25K |
| 2024-06-11 | Ford Harold Eugene Jr. | Director | Returned to company | 7K | $7.86 | $58K | 17K |
| 2024-06-11 | Knisely Evan A. | Director | Returned to company | 7K | $7.86 | $58K | 17K |
| 2024-06-11 | Knisely Evan A. | Director | Exercise or conversion | 25K | price not stated in the filing | not stated | 25K |
| 2024-06-11 | Marshall Joseph W III | Director | Returned to company | 7K | $7.86 | $58K | 216K |
| 2024-06-11 | Marshall Joseph W III | Director | Exercise or conversion | 25K | price not stated in the filing | not stated | 224K |
| 2024-06-11 | Nabel Gary J. | Director | Exercise or conversion | 25K | price not stated in the filing | not stated | 51K |
| 2024-06-11 | Nabel Gary J. | Director | Returned to company | 7K | $7.86 | $58K | 44K |
| 2024-06-11 | Nemirovsky Julian | Director | Returned to company | 7K | $7.86 | $58K | 44K |
| 2024-06-11 | Nemirovsky Julian | Director | Exercise or conversion | 25K | price not stated in the filing | not stated | 51K |
| 2024-06-11 | Phillips Holly L. | Director | Exercise or conversion | 25K | price not stated in the filing | not stated | 51K |
| 2024-06-11 | Phillips Holly L. | Director | Returned to company | 7K | $7.86 | $58K | 44K |
| 2024-06-11 | Varma Jay | EVP & Chief Medical Officer | Returned to company | 7K | $7.86 | $58K | 17K |
| 2024-06-11 | Varma Jay | EVP & Chief Medical Officer | Exercise or conversion | 25K | price not stated in the filing | not stated | 25K |
| 2024-03-25 | Miller Larry R. | General Counsel | Tax withholding | 19K | $8.35 | $159K | 31K |
| 2024-03-25 | Miller Larry R. | General Counsel | Grant | 50K | $0.00 | $0 | 50K |
| 2023-06-13 | Marshall Joseph W III | Director | Returned to company | 4K | $6.07 | $27K | 199K |
| 2023-06-13 | Marshall Joseph W III | Director | Exercise or conversion | 15K | price not stated in the filing | not stated | 203K |
| 2023-06-13 | Phillips Holly L. | Director | Returned to company | 4K | $6.07 | $27K | 26K |
| 2023-06-13 | Phillips Holly L. | Director | Exercise or conversion | 15K | price not stated in the filing | not stated | 31K |
| 2023-06-13 | Nemirovsky Julian | Director | Exercise or conversion | 15K | price not stated in the filing | not stated | 31K |
| 2023-06-13 | Nemirovsky Julian | Director | Returned to company | 4K | $6.07 | $27K | 26K |
| 2023-06-13 | DURNAN JAYMIE A | Director | Exercise or conversion | 15K | price not stated in the filing | not stated | 46K |
| 2023-06-13 | DURNAN JAYMIE A | Director | Returned to company | 4K | $6.07 | $27K | 41K |
| 2023-06-13 | Nabel Gary J. | Director | Returned to company | 4K | $6.07 | $27K | 26K |
| 2023-06-13 | Nabel Gary J. | Director | Exercise or conversion | 15K | price not stated in the filing | not stated | 31K |
| 2022-06-14 | Antal James | Director | Returned to company | 7K | $10.26 | $70K | 117K |
| 2022-06-14 | Antal James | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 124K |
| 2022-06-14 | DURNAN JAYMIE A | Director | Returned to company | 7K | $10.26 | $70K | 31K |
| 2022-06-14 | DURNAN JAYMIE A | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 38K |
| 2022-06-14 | Kane Julie | Director | Returned to company | 7K | $10.26 | $70K | 48K |
| 2022-06-14 | Kane Julie | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 55K |
| 2022-06-14 | Marshall Joseph W III | Director | Returned to company | 7K | $10.26 | $70K | 189K |
| 2022-06-14 | Marshall Joseph W III | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 196K |
| 2022-06-14 | Nabel Gary J. | Director | Returned to company | 7K | $10.26 | $70K | 16K |
| 2022-06-14 | Nabel Gary J. | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 23K |
| 2022-06-14 | Nemirovsky Julian | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 23K |
| 2022-06-14 | Nemirovsky Julian | Director | Returned to company | 7K | $10.26 | $70K | 16K |
| 2022-06-14 | Phillips Holly L. | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 23K |
| 2022-06-14 | Phillips Holly L. | Director | Returned to company | 7K | $10.26 | $70K | 16K |
| 2022-06-14 | Plansky Michael C. | Director | Returned to company | 7K | $10.26 | $70K | 76K |
| 2022-06-14 | Plansky Michael C. | Director | Exercise or conversion | 23K | price not stated in the filing | not stated | 83K |
| 2021-12-09 | Antal James | Director | Sell | 30K | $7.82 | $235K | 101K |
| 2021-07-31 | Abrams Robin Elizabeth | General Counsel and CAO | Tax withholding | 11K | $6.37 | $72K | 50K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
13F holders
Tracked managers holding SIGA at their latest 13F. JSON7 of the 30 tracked managers held SIGA at their latest 13F, $12.7M in total at quarter-end prices. AQR Capital Management is the largest at $4.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 1.2M | $4.5M | 0.00% | +26K |
| Millennium Management | 2026-06-30 | 580K | $2.1M | 0.00% | +113K |
| Citadel Advisors | 2026-06-30 | 551K | $2.0M | 0.00% | -154K |
| Renaissance Technologies | 2026-06-30 | 426K | $1.5M | 0.00% | -49K |
| Two Sigma Investments | 2026-06-30 | 358K | $1.3M | 0.00% | -76K |
| D. E. Shaw & Co. | 2026-06-30 | 265K | $964K | 0.00% | -191K |
| Point72 Asset Management | 2026-06-30 | 58K | $212K | 0.00% | +20K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Siga Technologies in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Siga Technologies (SIGA), SEC CIK 1010086, listed on Nasdaq, classified by the SEC as pharmaceutical preparations. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-05.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-06-09.JSON and CSV
- Company record
- EDGAR filing index for CIK 1010086Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of SIGA is sold short?
3,563,320 shares were held short at the 2026-10-15 settlement, 6.4 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is SIGA's daily short volume?
On 2026-11-02, 116,759 of the 320,959 SIGA shares reported to FINRA were sold short, 36.4% of the day's reported volume. Short volume is a flow for one day, not a position.
Does SIGA have fails to deliver?
The SEC's latest file shows 2 SIGA shares failed to deliver at settlement 2026-10-05. Fails are reported per settlement date and published twice a month with a lag.
Are SIGA insiders buying or selling?
No open-market insider trades were reported for SIGA in the last 90 days. The most recent filings are listed below. Latest filing: Nabel Gary J. (Director) on 2026-06-09.
Which tracked 13F managers own SIGA?
7 of the 30 tracked 13F managers held SIGA shares at their latest filing, $12.7M in all. The largest: Cliff Asness's AQR Capital Management (1.2M shares, $4.5M), Izzy Englander's Millennium Management (580K shares, $2.1M), Ken Griffin's Citadel Advisors (551K shares, $2.0M), Renaissance Technologies (426K shares, $1.5M), Two Sigma Investments (358K shares, $1.3M), D. E. Shaw & Co. (265K shares, $964K). The table above lists all 7.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.