BlackSky Technology Inc. (BKSY)
Every FINRA and SEC series the site collects for BlackSky Technology Inc.: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE.
7.1M
Short interest
settlement 2026-08-14
6.6
Days to cover
-5.4% vs prior
71.0%
Short share of volume
2026-09-11
2,635
Fails to deliver
settlement 2026-08-12
-$532K
Insider flow, 90 days
0 buys, 2 sells
As of 2026-09-11.
Short interest
FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSONAs of 14 August 2026, short interest in BKSY is 7,145,393 shares, down 637,103 shares over the last month. Over the last 48 readings it ranged from 820,695 shares (13 September 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, elevated.
Embed this chartfree, with the attribution line it carries
<iframe src="https://xoomar.com/embed/stocks/bksy" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 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 |
Daily short volume
FINRA Reg SHO, last 60 sessions. JSONAs of 11 September 2026, the short share of BKSY volume is 71.0%, up 31.6 points over the last five sessions. Over the last 52 readings it ranged from 32.6% (16 July 2026) to 74.9% (20 July 2026). The latest reading sits at the top of that range. The latest reading is 17.2 points above the 30-session average of 53.8%, on 354K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-09-11 | 251K | 354K | 71.0% | 40,150 |
| 2026-09-10 | 169K | 280K | 60.3% | 147 |
| 2026-09-09 | 425K | 641K | 66.3% | 96 |
| 2026-09-08 | 233K | 445K | 52.3% | 98 |
| 2026-09-04 | 232K | 391K | 59.2% | 7 |
| 2026-09-03 | 272K | 691K | 39.4% | 1,617 |
| 2026-09-02 | 103K | 216K | 47.6% | 0 |
| 2026-09-01 | 156K | 303K | 51.5% | 277 |
| 2026-08-31 | 121K | 266K | 45.6% | 238 |
| 2026-08-28 | 166K | 301K | 55.0% | 2,402 |
| 2026-08-27 | 139K | 236K | 58.8% | 0 |
| 2026-08-26 | 84K | 165K | 50.6% | 7 |
| 2026-08-25 | 142K | 232K | 61.3% | 0 |
| 2026-08-24 | 187K | 296K | 62.9% | 30 |
| 2026-08-21 | 212K | 351K | 60.4% | 32 |
| 2026-08-20 | 185K | 488K | 37.9% | 32 |
| 2026-08-19 | 200K | 396K | 50.5% | 107 |
| 2026-08-18 | 240K | 441K | 54.5% | 777 |
| 2026-08-17 | 201K | 354K | 56.9% | 2,805 |
| 2026-08-14 | 125K | 251K | 49.6% | 85 |
| 2026-08-13 | 221K | 401K | 55.3% | 5,010 |
| 2026-08-12 | 307K | 571K | 53.7% | 350 |
| 2026-08-11 | 157K | 371K | 42.2% | 13 |
| 2026-08-10 | 327K | 676K | 48.4% | 151 |
| 2026-08-07 | 181K | 513K | 35.2% | 717 |
| 2026-08-06 | 414K | 723K | 57.2% | 1,035 |
| 2026-08-05 | 146K | 284K | 51.5% | 691 |
| 2026-08-04 | 199K | 424K | 46.8% | 1,205 |
| 2026-08-03 | 259K | 379K | 68.5% | 11,581 |
| 2026-07-31 | 204K | 317K | 64.2% | 0 |
Fails to deliver
SEC, by settlement date. JSONAs of 12 August 2026, the fails-to-deliver balance in BKSY is 2,635 shares, down 107 shares over the last settlement date. Over the last 52 readings it ranged from 4 shares (24 June 2026) to 215,911 shares (4 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 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 |
| 2026-06-04 | 215,911 | $37.48 | $8.1M |
| 2026-06-03 | 3,865 | $43.91 | $170K |
| 2026-06-02 | 134 | $42.38 | $6K |
| 2026-04-24 | 34,840 | $38.44 | $1.3M |
| 2026-04-23 | 324 | $40.66 | $13K |
| 2026-04-21 | 137 | $37.42 | $5K |
| 2026-04-20 | 20,633 | $37.57 | $775K |
| 2026-04-17 | 35,306 | $39.00 | $1.4M |
| 2026-04-16 | 13,614 | $33.08 | $450K |
| 2026-04-14 | 327 | $34.79 | $11K |
| 2026-04-13 | 74,343 | $34.14 | $2.5M |
| 2026-04-09 | 51,170 | $33.41 | $1.7M |
| 2026-04-08 | 17,709 | $34.05 | $603K |
Insider trades
SEC Form 4, newest first, 50 of 52 shown. JSONInsiders at BKSY reported 2 open-market sells worth $532K in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: O'Toole Brian E (CEO and President) on 2026-09-09.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 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. | n/a | Grant | 805 | $0.00 | $0 | 77K |
| 2026-06-30 | TOLONEN JAMES R | n/a | Grant | 805 | $0.00 | $0 | 78K |
| 2026-06-30 | Porteous William D. | n/a | Grant | 805 | $0.00 | $0 | 79K |
| 2026-06-30 | Abraham Magid M | n/a | Grant | 805 | $0.00 | $0 | 66K |
| 2026-03-31 | Porteous William D. | n/a | Grant | 894 | $0.00 | $0 | 78K |
| 2026-03-31 | Gordon Susan M. | n/a | Grant | 894 | $0.00 | $0 | 76K |
| 2026-03-31 | TOLONEN JAMES R | n/a | Grant | 894 | $0.00 | $0 | 77K |
| 2026-03-31 | Abraham Magid M | n/a | 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. | n/a | Grant | 1K | $0.00 | $0 | 77K |
| 2025-12-31 | Gordon Susan M. | n/a | Grant | 1K | $0.00 | $0 | 76K |
| 2025-12-31 | TOLONEN JAMES R | n/a | Grant | 1K | $0.00 | $0 | 76K |
| 2025-12-31 | Abraham Magid M | n/a | 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 | n/a | Grant | 750 | $0.00 | $0 | 75K |
| 2025-12-10 | Porteous William D. | n/a | Grant | 2K | $0.00 | $0 | 76K |
| 2025-09-30 | Porteous William D. | n/a | Grant | 1K | $0.00 | $0 | 74K |
| 2025-09-30 | Gordon Susan M. | n/a | Grant | 1K | $0.00 | $0 | 74K |
| 2025-09-30 | TOLONEN JAMES R | n/a | Grant | 1K | $0.00 | $0 | 74K |
| 2025-09-30 | Abraham Magid M | n/a | Grant | 1K | $0.00 | $0 | 63K |
| 2025-09-15 | O'Toole Brian E | CEO and President | Grant | 250K | $0.00 | $0 | 1.0M |
| 2025-09-11 | Harvey Timothy M. | n/a | Grant | 9K | $0.00 | $0 | 57K |
| 2025-09-11 | Porteous William D. | n/a | Grant | 9K | $0.00 | $0 | 73K |
| 2025-09-11 | Gordon Susan M. | n/a | Grant | 9K | $0.00 | $0 | 73K |
| 2025-09-11 | DiDomenico David | n/a | Grant | 9K | $0.00 | $0 | 173K |
| 2025-09-11 | TOLONEN JAMES R | n/a | Grant | 9K | $0.00 | $0 | 73K |
| 2025-09-11 | Abraham Magid M | n/a | 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. | n/a | Grant | 1K | $0.00 | $0 | 64K |
| 2025-06-30 | Gordon Susan M. | n/a | Grant | 1K | $0.00 | $0 | 65K |
| 2025-06-30 | TOLONEN JAMES R | n/a | Grant | 1K | $0.00 | $0 | 64K |
| 2025-06-30 | Abraham Magid M | n/a | Grant | 1K | $0.00 | $0 | 53K |
| 2025-06-16 | Ward Tracy | SVP & Controller | Option exercise | 2K | $11.59 | $28K | 45K |
| 2025-06-16 | Ward Tracy | SVP & Controller | Option exercise | 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 |
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 the rarer, stronger signal.
Planned sales (Form 144)
Newest first. JSON1 Form 144 notice on file for BKSY worth $1.8M at the prices reported; 1 in the last 90 days worth $1.8M. Latest: O'Toole Brian E filed on 2026-09-09 to sell 80,000 shares ($1.8M) from 2026-09-09.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-09 | O'Toole Brian EOfficer | 80K | $1.8M | 0.195% | 2026-09-09 | THE CHARLES SCHWAB CORPORATION |
Large holders (13D and 13G)
One row per reporting person, newest filing first. JSON2 holders above 5% have filed on BKSY, 2 on Schedule 13D (active intent). The largest reported stake is Mithril LP at 0.0% of the class (0 shares), filed 2026-08-20 for an event on 2026-06-05.
| 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 |
13F holders
Tracked managers holding BKSY at their latest 13F. JSON8 of the 30 tracked managers held BKSY at their latest 13F, $82.7M in total at quarter-end prices. Citadel Advisors is the largest at $26.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 5 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 949K | $26.5M | 0.00% | +648K |
| Millennium Management | 2026-06-30 | 914K | $25.5M | 0.01% | -161K |
| D. E. Shaw & Co. | 2026-06-30 | 445K | $12.4M | 0.01% | +313K |
| Two Sigma Investments | 2026-06-30 | 243K | $6.8M | 0.00% | +195K |
| Renaissance Technologies | 2026-06-30 | 194K | $5.4M | 0.01% | +54K |
| Point72 Asset Management | 2026-06-30 | 183K | $5.1M | 0.01% | -22K |
| AQR Capital Management | 2026-06-30 | 35K | $976K | 0.00% | +2K |
| Millennium Management | 2026-06-30 | 150K | $8K | 0.00% | -764K |
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 Inc. 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 pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, 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 summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.
This page follows BlackSky Technology Inc. (BKSY), SEC CIK 1753539, listed on NYSE. The cross-market tables live on the short interest and insider transactions hubs.
Source and method
- Short interest
- FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-14.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-12.JSON and CSV
- Planned sales
- SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-09-09.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-08-20.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Insider trades
- SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-09.JSON and CSV
- Company record
- EDGAR filing index for CIK 1753539Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 30 requests a minute without a key, 120 a minute with a key from a free account.
Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 13 Sep 05:40 UTC.
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 crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short 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 BKSY is sold short?
What is BKSY's daily short volume?
Does BKSY have fails to deliver?
Are BKSY insiders buying or selling?
Have BKSY insiders filed to sell?
Who owns more than 5% of BKSY?
Which funds hold BKSY?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.