BlackSky Technology (BKSY)
BlackSky Technology on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as radio & tv broadcasting & communications equipment.
7.0M
Short interest
settlement 2026-10-15
6.6
Days to cover
-0.7 days vs prior
51.3%
Short share of volume
2026-10-28
2,993
Fails to deliver
settlement 2026-09-29
Thu 5 Nov
Next earnings
estimated date
-$3.5M
Insider flow, 90 days
0 buys, 11 sells
As of 2026-10-28.
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 BKSY is 7,002,112 shares, up 57,591 shares over the last month. Over the last 48 readings it ranged from 1,480,120 shares (15 November 2024) to 8,697,183 shares (28 November 2025). At the reported average volume of 1.1M shares a day that is 6.6 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 7,002,112 | +2.8% | 1,067,799 | 6.56 |
| 2026-09-30 | 6,812,699 | -1.9% | 938,124 | 7.26 |
| 2026-09-15 | 6,944,521 | +1.0% | 976,765 | 7.11 |
| 2026-08-31 | 6,876,649 | -3.8% | 799,292 | 8.60 |
| 2026-08-14 | 7,145,393 | -5.4% | 1,079,429 | 6.62 |
| 2026-07-31 | 7,556,500 | -2.9% | 1,127,424 | 6.70 |
| 2026-07-15 | 7,782,496 | -2.7% | 1,316,025 | 5.91 |
| 2026-06-30 | 7,995,133 | +0.1% | 2,095,833 | 3.81 |
| 2026-06-15 | 7,985,949 | +5.2% | 2,502,665 | 3.19 |
| 2026-05-29 | 7,594,304 | +7.9% | 2,483,136 | 3.06 |
| 2026-05-15 | 7,036,054 | +0.6% | 2,650,577 | 2.65 |
| 2026-04-30 | 6,993,009 | -0.5% | 1,867,292 | 3.75 |
| 2026-04-15 | 7,030,823 | +3.0% | 2,559,736 | 2.75 |
| 2026-03-31 | 6,825,284 | -5.5% | 1,697,293 | 4.02 |
| 2026-03-13 | 7,221,165 | -7.5% | 1,371,416 | 5.27 |
| 2026-02-27 | 7,809,145 | +2.1% | 1,169,156 | 6.68 |
| 2026-02-13 | 7,650,626 | +2.3% | 1,565,479 | 4.89 |
| 2026-01-30 | 7,476,611 | +6.7% | 1,608,694 | 4.65 |
| 2026-01-15 | 7,006,883 | -8.9% | 1,652,744 | 4.24 |
| 2025-12-31 | 7,693,997 | -8.9% | 1,319,496 | 5.83 |
| 2025-12-15 | 8,448,866 | -2.9% | 1,179,750 | 7.16 |
| 2025-11-28 | 8,697,183 | +0.4% | 2,058,990 | 4.22 |
| 2025-11-14 | 8,664,830 | +19.5% | 2,096,729 | 4.13 |
| 2025-10-31 | 7,250,744 | +6.1% | 1,700,814 | 4.26 |
| 2025-10-15 | 6,831,914 | +6.3% | 3,017,411 | 2.26 |
| 2025-09-30 | 6,429,021 | -0.1% | 1,912,920 | 3.36 |
| 2025-09-15 | 6,433,322 | +6.8% | 1,711,167 | 3.76 |
| 2025-08-29 | 6,021,598 | +7.5% | 1,515,489 | 3.97 |
| 2025-08-15 | 5,601,383 | +11.6% | 1,814,350 | 3.09 |
| 2025-07-31 | 5,020,620 | +20.9% | 2,898,674 | 1.73 |
| 2025-07-15 | 4,154,407 | -9.6% | 1,793,285 | 2.32 |
| 2025-06-30 | 4,593,440 | +39.0% | 3,013,078 | 1.52 |
| 2025-06-13 | 3,304,229 | -9.5% | 1,211,122 | 2.73 |
| 2025-05-30 | 3,651,286 | +6.7% | 990,334 | 3.69 |
| 2025-05-15 | 3,422,946 | +0.6% | 914,766 | 3.74 |
| 2025-04-30 | 3,402,545 | -4.3% | 610,956 | 5.57 |
| 2025-04-15 | 3,556,520 | -5.3% | 862,356 | 4.12 |
| 2025-03-31 | 3,756,952 | +8.3% | 963,565 | 3.90 |
| 2025-03-14 | 3,469,570 | +40.8% | 1,922,889 | 1.80 |
| 2025-02-28 | 2,463,535 | +7.3% | 2,350,932 | 1.05 |
| 2025-02-14 | 2,295,810 | +14.3% | 1,382,321 | 1.66 |
| 2025-01-31 | 2,008,226 | -13.6% | 2,432,186 | 1.00 |
| 2025-01-15 | 2,325,170 | +10.5% | 851,834 | 2.73 |
| 2024-12-31 | 2,103,940 | +22.4% | 1,106,182 | 1.90 |
| 2024-12-13 | 1,718,160 | +12.1% | 826,339 | 2.08 |
| 2024-11-29 | 1,532,802 | +3.6% | 999,816 | 1.53 |
| 2024-11-15 | 1,480,120 | -8.9% | 1,289,782 | 1.15 |
| 2024-10-31 | 1,624,271 | -7.0% | 837,481 | 1.94 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of BKSY volume is 51.3%, up 5.0 points over the last five sessions. Over the last 30 readings it ranged from 32.8% (2 October 2026) to 65.7% (7 October 2026). The latest reading is in line with the 30-session average of 52.7%, on 209K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 107K | 209K | 51.3% | 302 |
| 2026-10-27 | 205K | 383K | 53.6% | 2,100 |
| 2026-10-26 | 126K | 259K | 48.8% | 200 |
| 2026-10-23 | 154K | 265K | 58.0% | 333 |
| 2026-10-22 | 110K | 243K | 45.5% | 5 |
| 2026-10-21 | 112K | 243K | 46.3% | 136 |
| 2026-10-20 | 200K | 368K | 54.2% | 2,446 |
| 2026-10-19 | 122K | 260K | 46.9% | 0 |
| 2026-10-16 | 214K | 367K | 58.4% | 0 |
| 2026-10-15 | 261K | 456K | 57.2% | 28,245 |
| 2026-10-14 | 460K | 930K | 49.5% | 36,064 |
| 2026-10-13 | 270K | 411K | 65.7% | 3,235 |
| 2026-10-12 | 200K | 416K | 48.0% | 356 |
| 2026-10-09 | 122K | 243K | 50.2% | 0 |
| 2026-10-08 | 278K | 457K | 60.8% | 736 |
| 2026-10-07 | 188K | 286K | 65.7% | 1,103 |
| 2026-10-06 | 341K | 550K | 62.0% | 700 |
| 2026-10-05 | 194K | 330K | 58.9% | 0 |
| 2026-10-02 | 220K | 672K | 32.8% | 300 |
| 2026-10-01 | 247K | 486K | 50.9% | 5,995 |
| 2026-09-30 | 239K | 463K | 51.6% | 1,779 |
| 2026-09-29 | 177K | 318K | 55.8% | 0 |
| 2026-09-28 | 100K | 219K | 45.7% | 192 |
| 2026-09-25 | 141K | 316K | 44.5% | 0 |
| 2026-09-24 | 170K | 365K | 46.5% | 0 |
| 2026-09-23 | 107K | 216K | 49.4% | 6,865 |
| 2026-09-22 | 164K | 292K | 56.0% | 0 |
| 2026-09-21 | 194K | 356K | 54.5% | 22,339 |
| 2026-09-18 | 227K | 376K | 60.6% | 0 |
| 2026-09-17 | 213K | 418K | 50.9% | 8 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 29 September 2026, the fails-to-deliver balance in BKSY is 2,993 shares, down 6,065 shares over the last settlement date. Over the last 30 readings it ranged from 4 shares (24 June 2026) to 110,343 shares (10 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-29 | 2,993 | $22.95 | $69K |
| 2026-09-25 | 9,058 | $23.17 | $210K |
| 2026-09-23 | 18 | $23.19 | $417 |
| 2026-09-21 | 3,847 | $21.67 | $83K |
| 2026-09-18 | 7,258 | $22.76 | $165K |
| 2026-09-16 | 129 | $21.38 | $3K |
| 2026-09-14 | 3,229 | $20.61 | $67K |
| 2026-09-11 | 19 | $20.75 | $394 |
| 2026-09-08 | 4,197 | $20.50 | $86K |
| 2026-09-04 | 31,796 | $20.63 | $656K |
| 2026-09-01 | 2,935 | $23.10 | $68K |
| 2026-08-31 | 1,596 | $23.70 | $38K |
| 2026-08-24 | 991 | $27.75 | $28K |
| 2026-08-12 | 2,635 | $29.89 | $79K |
| 2026-08-05 | 2,742 | $25.41 | $70K |
| 2026-08-04 | 1,035 | $23.90 | $25K |
| 2026-07-21 | 84 | $21.86 | $2K |
| 2026-07-17 | 30 | $21.46 | $644 |
| 2026-07-09 | 29 | $25.88 | $751 |
| 2026-07-06 | 617 | $27.88 | $17K |
| 2026-06-26 | 4,024 | $24.35 | $98K |
| 2026-06-25 | 7,125 | $25.21 | $180K |
| 2026-06-24 | 4 | $26.90 | $108 |
| 2026-06-17 | 6,670 | $28.77 | $192K |
| 2026-06-16 | 33,973 | $31.19 | $1.1M |
| 2026-06-15 | 44,553 | $32.42 | $1.4M |
| 2026-06-12 | 64,594 | $35.97 | $2.3M |
| 2026-06-10 | 110,343 | $31.65 | $3.5M |
| 2026-06-09 | 14 | $34.28 | $480 |
| 2026-06-08 | 69,203 | $34.76 | $2.4M |
Insider trades
SEC Form 4, newest first. JSONInsiders at BKSY reported 11 open-market sells worth $3.5M in the last 90 days and no open-market buys. Latest filing: Lin Christiana L (General Counsel & CAO) on 2026-10-20.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-20 | Lin Christiana L | General Counsel & CAO | Sell | 6K | $16.86 | $101K | 416K |
| 2026-10-20 | O'Toole Brian E | CEO and President | Sell | 20K | $16.86 | $337K | 1.0M |
| 2026-10-20 | Dubois Henry Edward | Chief Financial Officer | Sell | 4K | $16.85 | $67K | 475K |
| 2026-09-30 | Porteous William D. | Director | Grant | 1K | $0.00 | $0 | 88K |
| 2026-09-30 | Gordon Susan M. | Director | Grant | 1K | $0.00 | $0 | 86K |
| 2026-09-30 | TOLONEN JAMES R | Director | Grant | 1K | $0.00 | $0 | 87K |
| 2026-09-30 | Abraham Magid M | Director | Grant | 1K | $0.00 | $0 | 74K |
| 2026-09-21 | O'Toole Brian E | CEO and President | Sell | 20K | $22.88 | $458K | 1.0M |
| 2026-09-21 | Dubois Henry Edward | Chief Financial Officer | Sell | 4K | $22.97 | $92K | 479K |
| 2026-09-21 | Lin Christiana L | General Counsel & CAO | Sell | 6K | $23.10 | $139K | 422K |
| 2026-09-11 | Harvey Timothy M. | Director | Grant | 7K | $0.00 | $0 | 65K |
| 2026-09-11 | Porteous William D. | Director | Grant | 9K | $0.00 | $0 | 87K |
| 2026-09-11 | Gordon Susan M. | Director | Grant | 7K | $0.00 | $0 | 85K |
| 2026-09-11 | DiDomenico David | Director | Grant | 7K | $0.00 | $0 | 181K |
| 2026-09-11 | O'Toole Brian E | CEO and President | Sell | 56K | $20.95 | $1.2M | 1.1M |
| 2026-09-11 | Lin Christiana L | General Counsel & CAO | Sell | 13K | $20.95 | $273K | 428K |
| 2026-09-11 | Dubois Henry Edward | Chief Financial Officer | Sell | 15K | $20.95 | $319K | 483K |
| 2026-09-11 | TOLONEN JAMES R | Director | Grant | 8K | $0.00 | $0 | 86K |
| 2026-09-11 | Abraham Magid M | Director | Grant | 7K | $0.00 | $0 | 73K |
| 2026-09-09 | O'Toole Brian E | CEO and President | Sell | 20K | $21.83 | $437K | 1.1M |
| 2026-08-28 | Dubois Henry Edward | Chief Financial Officer | Sell | 4K | $23.78 | $95K | 498K |
| 2026-06-30 | Gordon Susan M. | Director | Grant | 805 | $0.00 | $0 | 77K |
| 2026-06-30 | TOLONEN JAMES R | Director | Grant | 805 | $0.00 | $0 | 78K |
| 2026-06-30 | Porteous William D. | Director | Grant | 805 | $0.00 | $0 | 79K |
| 2026-06-30 | Abraham Magid M | Director | Grant | 805 | $0.00 | $0 | 66K |
| 2026-06-10 | Lin Christiana L | General Counsel & CAO | Sell | 12K | $34.10 | $409K | 441K |
| 2026-06-10 | Dubois Henry Edward | Chief Financial Officer | Sell | 15K | $34.10 | $503K | 502K |
| 2026-06-10 | O'Toole Brian E | CEO and President | Sell | 16K | $34.10 | $529K | 1.1M |
| 2026-03-31 | Porteous William D. | Director | Grant | 894 | $0.00 | $0 | 78K |
| 2026-03-31 | Gordon Susan M. | Director | Grant | 894 | $0.00 | $0 | 76K |
| 2026-03-31 | TOLONEN JAMES R | Director | Grant | 894 | $0.00 | $0 | 77K |
| 2026-03-31 | Abraham Magid M | Director | Grant | 894 | $0.00 | $0 | 65K |
| 2026-03-11 | O'Toole Brian E | CEO and President | Tax withholding | 25K | $24.00 | $600K | 964K |
| 2026-03-11 | Lin Christiana L | General Counsel & CAO | Tax withholding | 14K | $24.00 | $330K | 380K |
| 2026-03-11 | Dubois Henry Edward | Chief Financial Officer | Tax withholding | 24K | $24.00 | $565K | 440K |
| 2026-03-11 | Ward Tracy | SVP & Controller | Tax withholding | 803 | $24.00 | $19K | 43K |
| 2026-03-10 | O'Toole Brian E | CEO and President | Grant | 192K | $0.00 | $0 | 1.2M |
| 2026-03-10 | Lin Christiana L | General Counsel & CAO | Grant | 73K | $0.00 | $0 | 453K |
| 2026-03-10 | Dubois Henry Edward | Chief Financial Officer | Grant | 77K | $0.00 | $0 | 517K |
| 2025-12-31 | Porteous William D. | Director | Grant | 1K | $0.00 | $0 | 77K |
| 2025-12-31 | Gordon Susan M. | Director | Grant | 1K | $0.00 | $0 | 76K |
| 2025-12-31 | TOLONEN JAMES R | Director | Grant | 1K | $0.00 | $0 | 76K |
| 2025-12-31 | Abraham Magid M | Director | Grant | 1K | $0.00 | $0 | 64K |
| 2025-12-12 | Ward Tracy | SVP & Controller | Sell | 700 | $19.27 | $13K | 44K |
| 2025-12-12 | Lin Christiana L | General Counsel & CAO | Sell | 10K | $19.27 | $200K | 394K |
| 2025-12-12 | Dubois Henry Edward | Chief Financial Officer | Sell | 13K | $19.27 | $249K | 463K |
| 2025-12-12 | O'Toole Brian E | CEO and President | Sell | 13K | $19.27 | $259K | 989K |
| 2025-12-10 | TOLONEN JAMES R | Director | Grant | 750 | $0.00 | $0 | 75K |
| 2025-12-10 | Porteous William D. | Director | Grant | 2K | $0.00 | $0 | 76K |
| 2025-09-30 | Porteous William D. | Director | Grant | 1K | $0.00 | $0 | 74K |
| 2025-09-30 | Gordon Susan M. | Director | Grant | 1K | $0.00 | $0 | 74K |
| 2025-09-30 | TOLONEN JAMES R | Director | Grant | 1K | $0.00 | $0 | 74K |
| 2025-09-30 | Abraham Magid M | Director | Grant | 1K | $0.00 | $0 | 63K |
| 2025-09-15 | O'Toole Brian E | CEO and President | Grant | 250K | $0.00 | $0 | 1.0M |
| 2025-09-15 | O'Toole Brian E | CEO and President | Grant | 250K | $0.00 | $0 | 1.0M |
| 2025-09-12 | O'Toole Brian E | CEO and President | Sell | 32K | $17.45 | $550K | 752K |
| 2025-09-12 | Dubois Henry Edward | Chief Financial Officer | Sell | 30K | $17.45 | $523K | 476K |
| 2025-09-12 | Lin Christiana L | General Counsel & CAO | Sell | 23K | $17.45 | $397K | 404K |
| 2025-09-12 | Ward Tracy | SVP & Controller | Sell | 681 | $17.45 | $12K | 44K |
| 2025-09-11 | Harvey Timothy M. | Director | Grant | 9K | $0.00 | $0 | 57K |
| 2025-09-11 | Porteous William D. | Director | Grant | 9K | $0.00 | $0 | 73K |
| 2025-09-11 | Gordon Susan M. | Director | Grant | 9K | $0.00 | $0 | 73K |
| 2025-09-11 | DiDomenico David | Director | Grant | 9K | $0.00 | $0 | 173K |
| 2025-09-11 | TOLONEN JAMES R | Director | Grant | 9K | $0.00 | $0 | 73K |
| 2025-09-11 | Abraham Magid M | Director | Grant | 9K | $0.00 | $0 | 62K |
| 2025-09-10 | Ward Tracy | SVP & Controller | Sell | 720 | $17.45 | $13K | 44K |
| 2025-09-10 | O'Toole Brian E | CEO and President | Sell | 33K | $17.45 | $581K | 750K |
| 2025-09-10 | Lin Christiana L | General Counsel & CAO | Sell | 24K | $17.45 | $419K | 403K |
| 2025-09-10 | Dubois Henry Edward | Chief Financial Officer | Sell | 32K | $17.45 | $552K | 475K |
| 2025-06-30 | Porteous William D. | Director | Grant | 1K | $0.00 | $0 | 64K |
| 2025-06-30 | Gordon Susan M. | Director | Grant | 1K | $0.00 | $0 | 65K |
| 2025-06-30 | TOLONEN JAMES R | Director | Grant | 1K | $0.00 | $0 | 64K |
| 2025-06-30 | Abraham Magid M | Director | Grant | 1K | $0.00 | $0 | 53K |
| 2025-06-16 | Ward Tracy | SVP & Controller | Exercise or conversion | 3K | $11.59 | $30K | 45K |
| 2025-06-16 | Ward Tracy | SVP & Controller | Exercise or conversion | 2K | $11.59 | $28K | 45K |
| 2025-06-16 | Ward Tracy | SVP & Controller | Exercise or conversion | 8K | $11.59 | $97K | 43K |
| 2025-06-10 | Ward Tracy | SVP & Controller | Tax withholding | 683 | $12.08 | $8K | 34K |
| 2025-06-10 | Lin Christiana L | General Counsel & CAO | Tax withholding | 4K | $12.08 | $49K | 427K |
| 2025-06-10 | Dubois Henry Edward | Chief Financial Officer | Tax withholding | 8K | $12.08 | $95K | 499K |
| 2025-06-10 | O'Toole Brian E | CEO and President | Tax withholding | 7K | $12.08 | $84K | 783K |
| 2025-03-31 | TOLONEN JAMES R | Director | Grant | 3K | $0.00 | $0 | 63K |
| 2025-03-31 | Porteous William D. | Director | Grant | 3K | $0.00 | $0 | 63K |
| 2025-03-31 | Abraham Magid M | Director | Grant | 3K | $0.00 | $0 | 52K |
| 2025-03-31 | Gordon Susan M. | Director | Grant | 3K | $0.00 | $0 | 64K |
| 2025-03-10 | Dubois Henry Edward | Chief Financial Officer | Grant | 95K | $0.00 | $0 | 516K |
| 2025-03-10 | Dubois Henry Edward | Chief Financial Officer | Tax withholding | 8K | $9.23 | $78K | 507K |
| 2025-03-10 | O'Toole Brian E | CEO and President | Tax withholding | 7K | $9.23 | $64K | 790K |
| 2025-03-10 | O'Toole Brian E | CEO and President | Grant | 105K | $0.00 | $0 | 797K |
| 2025-03-10 | Ward Tracy | SVP & Controller | Tax withholding | 804 | $9.23 | $7K | 35K |
| 2025-03-10 | Lin Christiana L | General Counsel & CAO | Tax withholding | 5K | $9.23 | $43K | 431K |
| 2025-03-10 | Lin Christiana L | General Counsel & CAO | Grant | 81K | $0.00 | $0 | 435K |
| 2024-12-31 | TOLONEN JAMES R | Director | Grant | 2K | $0.00 | $0 | 60K |
| 2024-12-31 | Gordon Susan M. | Director | Grant | 2K | $0.00 | $0 | 61K |
| 2024-12-31 | Porteous William D. | Director | Grant | 2K | $0.00 | $0 | 60K |
| 2024-12-12 | DiDomenico David | Director | Sell | 671 | $10.65 | $7K | 165K |
| 2024-12-12 | Harvey Timothy M. | Director | Sell | 671 | $10.65 | $7K | 49K |
| 2024-12-12 | TOLONEN JAMES R | Director | Sell | 564 | $10.65 | $6K | 58K |
| 2024-12-12 | Porteous William D. | Director | Sell | 570 | $10.65 | $6K | 58K |
| 2024-12-12 | DiDomenico David | Director | Sell | 671 | $10.65 | $7K | 143K |
| 2024-12-12 | Abraham Magid M | Director | Sell | 481 | $10.65 | $5K | 49K |
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.
Planned sales (Form 144)
Newest first. JSON9 Form 144 notices on file for BKSY worth $4.3M at the prices reported; 2 in the last 90 days worth $2.2M. Latest: CHRISTIANA LIN filed on 2026-09-21 to sell 18,000 shares ($390K) from 2026-09-21.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-21 | CHRISTIANA LINOfficer | 18K | $390K | 0.044% | 2026-09-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-09 | O'Toole Brian EOfficer | 80K | $1.8M | 0.195% | 2026-09-09 | THE CHARLES SCHWAB CORPORATION |
| 2026-06-11 | O'Toole Brian EOfficer, Director | 16K | $529K | 0.038% | 2026-06-11 | Morgan Stanley Smith Barney LLC |
| 2026-06-11 | Lin Christiana LOfficer | 12K | $409K | 0.030% | 2026-06-11 | Morgan Stanley Smith Barney LLC |
| 2026-06-11 | Dubois Henry EdwardOfficer | 15K | $503K | 0.036% | 2026-06-11 | Morgan Stanley Smith Barney LLC |
| 2025-12-11 | Brian O'Tooleofficer | 13K | $259K | 0.037% | 2025-12-12 | Morgan Stanley Smith Barney LLC |
| 2025-12-11 | Christiana LinOfficer | 10K | $200K | 0.029% | 2025-12-12 | Morgan Stanley Smith Barney LLC |
| 2025-12-11 | Henry DuboisOfficer | 13K | $249K | 0.036% | 2025-12-12 | Morgan Stanley Smith Barney LLC |
| 2025-12-11 | Tracy WardOfficer | 700 | $13K | 0.002% | 2025-12-12 | Morgan Stanley Smith Barney LLC |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON1 holder reports 5% or more of BKSY in its latest filing, on Schedule 13G (passive). The holder is BlackRock, Inc. at 6.5% of the class (2,287,439 shares), filed 2025-10-17 for an event on 2025-09-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-20 | 13D/Ano. 4 | Mithril LPpartnership | 0 | 0.0% | 2026-06-05 |
| 2026-08-20 | 13D/Ano. 4 | Mithril II LPpartnership | 0 | 0.0% | 2026-06-05 |
| 2026-07-29 | 13G/Ano. 2 | Bank of New York Mellon Corpparent holding company | 658K | 1.8% | 2026-06-30 |
| 2026-07-29 | 13G/Ano. 2 | BNY Mellon IHC, LLCparent holding company | 600K | 1.6% | 2026-06-30 |
| 2026-07-29 | 13G/Ano. 2 | MBC Investments Corpparent holding company | 600K | 1.6% | 2026-06-30 |
| 2026-04-28 | 13G/Ano. 1 | Newton Investment Management North America, LLCinvestment adviser | 1.8M | 4.9% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 1 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-13 | 13G/Ano. 2 | AWM Investment Company, Inc.investment adviser | 1.7M | 4.8% | 2025-12-31 |
| 2025-10-17 | 13G/Ano. 1 | BlackRock, Inc.parent holding company | 2.3M | 6.5% | 2025-09-30 |
13F holders
Tracked managers holding BKSY at their latest 13F. JSON7 of the 30 tracked managers held BKSY at their latest 13F, $64.1M in total at quarter-end prices. Millennium Management is the largest at $25.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 7 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 914K | $25.5M | 0.01% | +369K |
| Citadel Advisors | 2026-06-30 | 472K | $13.2M | 0.00% | new |
| D. E. Shaw & Co. | 2026-06-30 | 363K | $10.1M | 0.00% | new |
| Two Sigma Investments | 2026-06-30 | 243K | $6.8M | 0.00% | +195K |
| Renaissance Technologies | 2026-06-30 | 194K | $5.4M | 0.01% | new |
| Point72 Asset Management | 2026-06-30 | 75K | $2.1M | 0.00% | new |
| AQR Capital Management | 2026-06-30 | 35K | $976K | 0.00% | +2K |
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
BlackSky Technology 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 BlackSky Technology (BKSY), SEC CIK 1753539, listed on NYSE, classified by the SEC as radio & tv broadcasting & communications equipment. 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 2026-10-28.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-29.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-21.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-20.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 2026-10-20.JSON and CSV
- Company record
- EDGAR filing index for CIK 1753539Ticker, 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.
Other companies the SEC classifies as radio & tv broadcasting & communications equipment
Other company pages
Datasets
Frequently Asked Questions
How much of BKSY is sold short?
7,002,112 shares were held short at the 2026-10-15 settlement, 6.6 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 BKSY's daily short volume?
On 2026-10-28, 107,402 of the 209,390 BKSY shares reported to FINRA were sold short, 51.3% of the day's reported volume. Short volume is a flow for one day, not a position.
Does BKSY have fails to deliver?
The SEC's latest file shows 2,993 BKSY shares failed to deliver at settlement 2026-09-29. Fails are reported per settlement date and published twice a month with a lag.
Are BKSY insiders buying or selling?
Insiders at BKSY reported 11 open-market sells worth $3.5M in the last 90 days and no open-market buys. Latest filing: Lin Christiana L (General Counsel & CAO) on 2026-10-20.
Have BKSY insiders filed to sell?
9 Form 144 notices on file for BKSY worth $4.3M at the prices reported; 2 in the last 90 days worth $2.2M. Latest: CHRISTIANA LIN filed on 2026-09-21 to sell 18,000 shares ($390K) from 2026-09-21.
Who owns 5% or more of BKSY?
1 holder reports 5% or more of BKSY in its latest filing, on Schedule 13G (passive). The holder is BlackRock, Inc. at 6.5% of the class (2,287,439 shares), filed 2025-10-17 for an event on 2025-09-30.
Which tracked 13F managers own BKSY?
7 of the 30 tracked 13F managers held BKSY shares at their latest filing, $64.1M in all. The largest: Izzy Englander's Millennium Management (914K shares, $25.5M), Ken Griffin's Citadel Advisors (472K shares, $13.2M), D. E. Shaw & Co. (363K shares, $10.1M), Two Sigma Investments (243K shares, $6.8M), Renaissance Technologies (194K shares, $5.4M), Steve Cohen's Point72 Asset Management (75K shares, $2.1M). 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.