Comparable stake leader
BlackRock, Inc.
SEC ownership of BlackSky Technology Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001753539.
Disclosed value leader
BlackRock, Inc.
Comparable rows
5/50
Latest evidence
20 Oct 2026
- Public ticker
- BKSY on NYSE
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
5 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
20 Oct 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001753539
- Issuer location
- Herndon, VA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of BlackSky Technology Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
5/50
Latest evidence
20 Oct 2026
13F
13D/G
3/4/5
Lead comparable stake: 6.5%
45 rows are not safely comparable across share classes.
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 6.5%.
5 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
6.5%
AWM Investment Company, Inc.
4.8%
Nantahala Capital Management, LLC
4.5%
Bank of New York Mellon Corp
1.8%
Walleye Capital LLC
0.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
6.5%
Reported 13D/G
· 30 Sep 2025
|
$86,403,883
3,094,695 shares
|
— | 30 Jun 2026 |
| AWM Investment Company, Inc. |
13D/G
13F
Company
|
4.8%
Reported 13D/G
· 31 Dec 2025
|
$44,192,872
1,725,610 shares
|
-$12,403,333 | 31 Dec 2025 |
| Nantahala Capital Management, LLC |
13D/G
|
4.5%
Reported 13D/G
· 31 Dec 2024
|
$11,663,698
1,377,060 shares
|
-$9,087,802 | 31 Dec 2024 |
| Bank of New York Mellon Corp |
13D/G
13F
Company
|
1.8%
Reported 13D/G
· 30 Jun 2026
|
$18,360,555
657,613 shares
|
-$35,192,350 | 30 Jun 2026 |
| Walleye Capital LLC |
13D/G
13F
Company
|
0.8%
Reported 13D/G
· 30 Sep 2024
|
$1,952,949
230,572 shares
|
$0 | 30 Sep 2024 |
| Mithril GP LP |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$11,043,476
8,241,400 shares
|
— | 09 Sep 2021 |
| SEAHAWK SPV INVESTMENT LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
—
14,594,452 shares
|
— | 09 Sep 2021 |
| TEMA ETFS LLC |
13F
Company
|
—
denominator unverified
|
$40,392,534
1,446,724 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$5,659,170.
Buys
$0
Insiders: 0
Sells
$5,659,170
Insiders: 4
Net
-$5,659,170
Shares: -248,235
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 248,235
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 168,557 | $0 | $3,497,029 | -$3,497,029 |
| 3-6 | 0 | 42,262 | $0 | $1,441,134 | -$1,441,134 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 37,416 | $0 | $721,006 | -$721,006 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-16 of 16 reporting-owner rows connected to BlackSky Technology Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Brian E. O'Toole
Net 12M change
-$5.66M
Full value: -$5,659,170 · USD · 12-month changeLatest report
20 Oct 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Brian E. O'Toole | CEO and President, Director | $25,930,275 | -$3,197,952 | -11% | Mixed | 20 Oct 2026 |
| William D. Porteous | Director | $22,566,590 | Mixed | 30 Sep 2026 | ||
| Christiana L. Lin | General Counsel & CAO | $13,695,732 | -$1,122,610 | -7.6% | Mixed | 20 Oct 2026 |
| Mithril GP LP | 10%+ Owner | $11,043,476 | Mixed | 09 Sep 2021 | ||
| Jonathan Z. Cohen | Former Co-Chairman | $10,594,375 | Mixed | 09 Sep 2021 | ||
| Henry Edward Dubois | Chief Financial Officer | $9,516,001 | -$1,325,119 | -12% | Mixed | 20 Oct 2026 |
| David DiDomenico | Director | $5,927,275 | Mixed | 11 Sep 2026 | ||
| James R. Tolonen | Director | $2,426,415 | Mixed | 30 Sep 2026 | ||
| Susan M. Gordon | Director | $2,390,287 | Mixed | 30 Sep 2026 | ||
| Magid M. Abraham | Director | $2,065,661 | Mixed | 30 Sep 2026 | ||
| Brian G. Daum | Chief Financial Officer | $1,908,527 | Mixed | 09 Sep 2021 | ||
| Timothy M. Harvey | Director | $1,807,038 | Mixed | 11 Sep 2026 | ||
| Tracy Ward | SVP & Controller | $976,927 | -$13,489 | -1.4% | Mixed | 11 Mar 2026 |
| Johan G. Broekhuysen | Chief Financial Officer | $604,536 | Mixed | 25 Feb 2022 | ||
| JANA PARTNERS LLC | Other* | Mixed | 09 Jun 2023 | |||
| SEAHAWK SPV INVESTMENT LLC | 10%+ Owner | Mixed | 09 Sep 2021 |
Recent insider transactions for BlackSky Technology Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Henry Edward Dubois | BKSY | Class A Common Stock | Sale | -0.84% | -$67,400 | $16.85 | -4,000 | 474,931 | 20 Oct 2026 | Direct |
| Brian E. O'Toole | BKSY | Class A Common Stock | Sale | -1.92% | -$337,200 | $16.86 | -20,000 | 1,023,396 | 20 Oct 2026 | Direct |
| Christiana L. Lin | BKSY | Class A Common Stock | Sale | -1.42% | -$101,160 | $16.86 | -6,000 | 415,680 | 20 Oct 2026 | Direct |
| Susan M. Gordon | BKSY | Class A Common Stock | Award | 1.25% | 1,055 | 85,612 | 30 Sep 2026 | Direct | ||
| James R. Tolonen | BKSY | Class A Common Stock | Award | 1.23% | 1,055 | 86,906 | 30 Sep 2026 | Direct | ||
| William D. Porteous | BKSY | Class A Common Stock | Award | 1.21% | 1,055 | 88,378 | 30 Sep 2026 | Direct | ||
| Magid M. Abraham | BKSY | Class A Common Stock | Award | 1.45% | 1,055 | 73,985 | 30 Sep 2026 | Direct | ||
| Christiana L. Lin | BKSY | Class A Common Stock | Sale | -1.4% | -$138,600 | $23.10 | -6,000 | 421,680 | 21 Sep 2026 | Direct |
| Henry Edward Dubois | BKSY | Class A Common Stock | Sale | -0.83% | -$91,880 | $22.97 | -4,000 | 478,931 | 21 Sep 2026 | Direct |
| Brian E. O'Toole | BKSY | Class A Common Stock | Sale | -1.88% | -$457,600 | $22.88 | -20,000 | 1,043,396 | 21 Sep 2026 | Direct |
| James R. Tolonen | BKSY | Class A Common Stock | Award | 10.3% | 8,005 | 85,851 | 11 Sep 2026 | Direct | ||
| William D. Porteous | BKSY | Class A Common Stock | Award | 11.1% | 8,733 | 87,323 | 11 Sep 2026 | Direct | ||
| Timothy M. Harvey | BKSY | Class A Common Stock | Award | 12.7% | 7,278 | 64,722 | 11 Sep 2026 | Direct | ||
| Susan M. Gordon | BKSY | Class A Common Stock | Award | 9.42% | 7,278 | 84,557 | 11 Sep 2026 | Direct | ||
| David DiDomenico | BKSY | Class A Common Stock | Award | 4.2% | 7,278 | 180,568 | 11 Sep 2026 | Direct | ||
| Magid M. Abraham | BKSY | Class A Common Stock | Award | 11.1% | 7,278 | 72,930 | 11 Sep 2026 | Direct | ||
| Brian E. O'Toole | BKSY | Class A Common Stock | Sale | -5.03% | -$1,179,066 | $20.95 | -56,280 | 1,063,396 | 11 Sep 2026 | Direct |
| Henry Edward Dubois | BKSY | Class A Common Stock | Sale | -3.06% | -$318,964 | $20.95 | -15,225 | 482,931 | 11 Sep 2026 | Direct |
| Christiana L. Lin | BKSY | Class A Common Stock | Sale | -2.96% | -$273,439 | $20.95 | -13,052 | 427,680 | 11 Sep 2026 | Direct |
| Brian E. O'Toole | BKSY | Class A Common Stock | Sale | -1.75% | -$436,600 | $21.83 | -20,000 | 1,119,676 | 09 Sep 2026 | Direct |
| Henry Edward Dubois | BKSY | Class A Common Stock | Sale | -0.8% | -$95,120 | $23.78 | -4,000 | 498,156 | 28 Aug 2026 | Direct |
| Susan M. Gordon | BKSY | Class A Common Stock | Award | 1.05% | 805 | 77,279 | 30 Jun 2026 | Direct | ||
| James R. Tolonen | BKSY | Class A Common Stock | Award | 1.04% | 805 | 77,846 | 30 Jun 2026 | Direct | ||
| William D. Porteous | BKSY | Class A Common Stock | Award | 1.03% | 805 | 78,590 | 30 Jun 2026 | Direct | ||
| Magid M. Abraham | BKSY | Class A Common Stock | Award | 1.24% | 805 | 65,652 | 30 Jun 2026 | Direct | ||
| Brian E. O'Toole | BKSY | Class A Common Stock | Sale | -1.34% | -$528,959 | $34.10 | -15,512 | 1,139,676 | 10 Jun 2026 | Direct |
| Henry Edward Dubois | BKSY | Class A Common Stock | Sale | -2.85% | -$502,941 | $34.10 | -14,749 | 502,156 | 10 Jun 2026 | Direct |
| Christiana L. Lin | BKSY | Class A Common Stock | Sale | -2.65% | -$409,234 | $34.10 | -12,001 | 440,732 | 10 Jun 2026 | Direct |
| Susan M. Gordon | BKSY | Class A Common Stock | Award | 1.18% | 894 | 76,474 | 31 Mar 2026 | Direct | ||
| James R. Tolonen | BKSY | Class A Common Stock | Award | 1.17% | 894 | 77,041 | 31 Mar 2026 | Direct | ||
| William D. Porteous | BKSY | Class A Common Stock | Award | 1.16% | 894 | 77,785 | 31 Mar 2026 | Direct | ||
| Magid M. Abraham | BKSY | Class A Common Stock | Award | 1.4% | 894 | 64,847 | 31 Mar 2026 | Direct | ||
| Brian E. O'Toole | BKSY | Class A Common Stock | Tax liability | -2.53% | -24,999 | 963,522 | 11 Mar 2026 | Direct | ||
| Christiana L. Lin | BKSY | Class A Common Stock | Tax liability | -3.49% | -13,741 | 379,817 | 11 Mar 2026 | Direct | ||
| Henry Edward Dubois | BKSY | Class A Common Stock | Tax liability | -5.08% | -23,551 | 439,822 | 11 Mar 2026 | Direct | ||
| Tracy Ward | BKSY | Class A Common Stock | Tax liability | -1.84% | -803 | 42,923 | 11 Mar 2026 | Direct | ||
| Brian E. O'Toole | BKSY | Class A Common Stock | Award | 19.9% | 191,666 | 1,155,188 | 10 Mar 2026 | Direct | ||
| Christiana L. Lin | BKSY | Class A Common Stock | Award | 19.2% | 72,916 | 452,733 | 10 Mar 2026 | Direct | ||
| Henry Edward Dubois | BKSY | Class A Common Stock | Award | 17.5% | 77,083 | 516,905 | 10 Mar 2026 | Direct | ||
| William D. Porteous | BKSY | Class A Common Stock | Award | 1.59% | 1,200 | 76,891 | 31 Dec 2025 | Direct | ||
| Magid M. Abraham | BKSY | Class A Common Stock | Award | 1.91% | 1,200 | 63,953 | 31 Dec 2025 | Direct | ||
| James R. Tolonen | BKSY | Class A Common Stock | Award | 1.6% | 1,200 | 76,147 | 31 Dec 2025 | Direct | ||
| Susan M. Gordon | BKSY | Class A Common Stock | Award | 1.61% | 1,200 | 75,580 | 31 Dec 2025 | Direct | ||
| Tracy Ward | BKSY | Class A Common Stock | Sale | -1.58% | -$13,489 | $19.27 | -700 | 43,726 | 12 Dec 2025 | Direct |
| Christiana L. Lin | BKSY | Class A Common Stock | Sale | -2.57% | -$200,177 | $19.27 | -10,388 | 393,558 | 12 Dec 2025 | Direct |
| Henry Edward Dubois | BKSY | Class A Common Stock | Sale | -2.71% | -$248,814 | $19.27 | -12,912 | 463,373 | 12 Dec 2025 | Direct |
| Brian E. O'Toole | BKSY | Class A Common Stock | Sale | -1.34% | -$258,526 | $19.27 | -13,416 | 988,521 | 12 Dec 2025 | Direct |
| James R. Tolonen | BKSY | Class A Common Stock | Award | 1.01% | 750 | 74,947 | 10 Dec 2025 | Direct | ||
| William D. Porteous | BKSY | Class A Common Stock | Award | 2.02% | 1,500 | 75,691 | 10 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.