Comparable stake leader
BlackRock, Inc.
SEC ownership of Ouster, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001816581.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
14 Sep 2026
- Public ticker
- OUST on Nasdaq
- 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
-
50 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
-
14 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001816581
- Issuer location
- San Francisco, CA
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 Ouster, 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
50/50
Latest evidence
14 Sep 2026
13F
13D/G
3/4/5
Lead comparable stake: 8.5%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 8.5%.
50 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.
8.5%
Charles Angus Pacala
1.6%
Darien Spencer
0.45%
Kenneth P. Gianella
0.38%
Virginia Boulet
0.36%
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
|
8.5%
from 13D/G
|
$347,432,579
5,557,143 shares
|
— | 30 Jun 2026 |
| Charles Angus Pacala |
3/4/5
President and CEO, Director
|
1.6%
|
$35,379,133
1,041,816 shares
|
-$3,380,994 | 14 Sep 2026 |
| Darien Spencer |
3/4/5
Chief Operating Officer
|
0.45%
|
$9,746,325
286,998 shares
|
-$4,151,597 | 14 Sep 2026 |
| Kenneth P. Gianella |
3/4/5
Chief Financial Officer
|
0.38%
|
$8,331,118
245,328 shares
|
-$4,455,486 | 14 Sep 2026 |
| Virginia Boulet |
3/4/5
Director
|
0.36%
|
$5,786,800
230,000 shares
|
+$178,006 | 11 May 2026 |
| Megan Chung |
3/4/5
General Counsel and Secretary
|
0.3%
|
$6,428,265
189,291 shares
|
-$1,803,363 | 14 Sep 2026 |
| Ted L. Tewksbury III |
3/4/5
Director
|
0.2%
|
$5,874,953
124,999 shares
|
-$192,976 | 17 Jun 2026 |
| Cyrille Jacquemet |
3/4/5
Chief Revenue Officer
|
0.17%
|
$3,583,908
105,538 shares
|
-$1,368,066 | 14 Sep 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: -$47,367,733.
Buys
$178,006
Insiders: 1
Sells
$47,545,739
Insiders: 9
Net
-$47,367,733
Shares: -1,377,599
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 8,158
Shares: 1,385,757
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 173,037 | $0 | $6,720,241 | -$6,720,241 |
| 3-6 | 1,658 | 1,061,548 | $41,831 | $37,108,362 | -$37,066,531 |
| 6-9 | 6,500 | 68,409 | $136,175 | $1,619,281 | -$1,483,106 |
| 9-12 | 0 | 82,763 | $0 | $2,097,855 | -$2,097,855 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 28 reporting-owner rows connected to Ouster, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
28
Largest Forms 3/4/5 holder
Charles Angus Pacala
Net 12M change
-$47,367,733
Latest report
14 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Charles Angus Pacala | President and CEO, Director | $35,379,133 | -$3,380,994 | -8.7% | Filing P/S | 14 Sep 2026 |
| Krishna Kantheti | 10%+ Owner | $16,736,098 | Mixed | 15 Aug 2023 | ||
| Anna S. Brunelle | Chief Financial Officer | $15,896,268 | Mixed | 16 Dec 2022 | ||
| Riaz Valani | Director | $14,645,534 | Mixed | 10 Feb 2023 | ||
| Remy W. Trafelet | Director | $14,063,852 | Mixed | 05 Jan 2023 | ||
| Mark Frichtl | Chief Technology Officer | $10,832,639 | -$31,059,721 | -74% | Filing P/S | 14 Sep 2026 |
| Shauna McIntyre | Pres. of Ouster Automotive | $10,769,906 | Mixed | 22 Oct 2021 | ||
| Darien Spencer | Chief Operating Officer | $9,746,325 | -$4,151,597 | -30% | Filing P/S | 14 Sep 2026 |
| Kenneth P. Gianella | Chief Financial Officer | $8,331,118 | -$4,455,486 | -35% | Filing P/S | 14 Sep 2026 |
| Megan Chung | General Counsel and Secretary | $6,428,265 | -$1,803,363 | -22% | Filing P/S | 14 Sep 2026 |
| Ted L. Tewksbury III | Director | $5,874,953 | -$192,976 | -3.2% | Filing P/S | 17 Jun 2026 |
| Virginia Boulet | Director | $5,786,800 | +$178,006 | +3.2% | Filing P/S | 11 May 2026 |
| Adam Dolinko | General Counsel And Secretary | $4,896,709 | Mixed | 13 Dec 2022 | ||
| Cyrille Jacquemet | Chief Revenue Officer | $3,583,908 | -$1,368,066 | -28% | Filing P/S | 14 Sep 2026 |
| Stephen A. Skaggs | Director | $2,774,729 | -$517,702 | -16% | Filing P/S | 05 Aug 2026 |
| Susan Heystee | Director | $2,530,728 | -$615,834 | -20% | Median | 06 Jul 2026 |
| Mark Weinswig | Chief Financial Officer | $1,685,777 | Filing P/S | 12 Dec 2024 | ||
| Ernest E. Maddock | Director | $1,633,129 | Mixed | 17 Jun 2026 | ||
| Christina Correia | Director | $1,403,743 | Mixed | 17 Jun 2026 | ||
| Emmanuel T. Hernandez | Director | $1,051,790 | Mixed | 05 Jan 2023 |
Recent insider transactions for Ouster, 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Megan Chung | OUST | Common Stock | Sale | -5.72% | $389,993 | $33.96 | -11,484 | 189,291 | 14 Sep 2026 | Direct |
| Darien Spencer | OUST | Common Stock | Sale | -4.27% | $434,953 | $33.96 | -12,808 | 286,999 | 14 Sep 2026 | Direct |
| Charles Angus Pacala | OUST | Common Stock | Sale | -2.83% | $1,031,847 | $33.96 | -30,385 | 1,041,816 | 14 Sep 2026 | Direct |
| Cyrille Jacquemet | OUST | Common Stock | Sale | -7.77% | $302,093 | $33.96 | -8,896 | 105,539 | 14 Sep 2026 | Direct |
| Kenneth P. Gianella | OUST | Common Stock | Sale | -6.01% | $532,682 | $33.96 | -15,686 | 245,328 | 14 Sep 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -5.56% | $637,691 | $33.96 | -18,778 | 318,987 | 14 Sep 2026 | Direct |
| Megan Chung | OUST | Common Stock | Gift | -1.03% | -2,084 | 200,775 | 09 Sep 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Gift | -10.3% | -38,745 | 337,765 | 02 Sep 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Options Exercise | 36.2% | 100,000 | 376,510 | 26 Aug 2026 | Direct | ||
| Mark Frichtl | OUST | Incentive Stock Option | Options Exercise | -49.8% | -100,000 | 100,713 | 26 Aug 2026 | Direct | ||
| Kenneth P. Gianella | OUST | Common Stock | Sale | -13.3% | $1,813,278 | $45.33 | -40,000 | 261,014 | 18 Aug 2026 | Direct |
| Stephen A. Skaggs | OUST | Common Stock | Sale | -5.56% | $163,281 | $45.18 | -3,614 | 61,415 | 06 Aug 2026 | Direct |
| Stephen A. Skaggs | OUST | Common Stock | Sale | -2.09% | $64,421 | $46.48 | -1,386 | 65,029 | 05 Aug 2026 | Direct |
| Darien Spencer | OUST | Common Stock | Sale | -9.1% | $1,350,000 | $45.00 | -30,000 | 299,807 | 04 Aug 2026 | Direct |
| Susan Heystee | OUST | Common Stock | Award | 1.66% | 660 | 40,479 | 06 Jul 2026 | Direct | ||
| Ted L. Tewksbury III | OUST | Common Stock | Sale | -1.34% | $79,665 | $47.00 | -1,695 | 124,999 | 22 Jun 2026 | Direct |
| Stephen A. Skaggs | OUST | Common Stock | Award | 7.66% | 4,725 | 66,415 | 17 Jun 2026 | Direct | ||
| Phillip Eyler | OUST | Common Stock | Award | 30.2% | 4,725 | 20,383 | 17 Jun 2026 | Direct | ||
| Ernest E. Maddock | OUST | Common Stock | Award | 5.61% | 4,725 | 88,902 | 17 Jun 2026 | Direct | ||
| Ted L. Tewksbury III | OUST | Common Stock | Award | 3.87% | 4,725 | 126,694 | 17 Jun 2026 | Direct | ||
| Susan Heystee | OUST | Common Stock | Award | 13.5% | 4,725 | 39,819 | 17 Jun 2026 | Direct | ||
| Christina Correia | OUST | Common Stock | Award | 6.59% | 4,725 | 76,415 | 17 Jun 2026 | Direct | ||
| Kenneth P. Gianella | OUST | Common Stock | Sale | -15.3% | $2,109,525 | $38.82 | -54,337 | 301,014 | 12 Jun 2026 | Direct |
| Charles Angus Pacala | OUST | Common Stock | Sale | -2.7% | $1,156,809 | $38.82 | -29,797 | 1,072,201 | 12 Jun 2026 | Direct |
| Cyrille Jacquemet | OUST | Common Stock | Sale | -7.08% | $338,653 | $38.82 | -8,723 | 114,435 | 12 Jun 2026 | Direct |
| Darien Spencer | OUST | Common Stock | Sale | -3.67% | $487,578 | $38.82 | -12,559 | 329,807 | 12 Jun 2026 | Direct |
| Megan Chung | OUST | Common Stock | Sale | -5.26% | $437,186 | $38.82 | -11,261 | 202,859 | 12 Jun 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -6.24% | $714,887 | $38.82 | -18,414 | 276,510 | 12 Jun 2026 | Direct |
| Cyrille Jacquemet | OUST | Common Stock | Sale | -7.11% | $377,320 | $40.00 | -9,433 | 123,158 | 26 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -51.1% | $12,821,974 | $41.53 | -308,742 | 294,924 | 26 May 2026 | Direct |
| Darien Spencer | OUST | Common Stock | Sale | -8.06% | $1,350,022 | $45.00 | -30,000 | 342,366 | 26 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -11.1% | $2,784,998 | $36.80 | -75,684 | 603,666 | 22 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 7.96% | 50,063 | 679,350 | 22 May 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -100% | -50,063 | 0 | 22 May 2026 | Direct | ||
| Susan Heystee | OUST | Common Stock | Sale | -21% | $324,243 | $34.80 | -9,316 | 35,094 | 21 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -0.68% | $155,380 | $36.00 | -4,316 | 628,638 | 15 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 0.69% | 4,316 | 632,954 | 15 May 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -7.94% | -4,316 | 50,063 | 15 May 2026 | Direct | ||
| Cyrille Jacquemet | OUST | Common Stock | Sale | -7.01% | $350,000 | $35.00 | -10,000 | 132,591 | 14 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -5.98% | $1,400,000 | $35.00 | -40,000 | 628,638 | 14 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 6.36% | 40,000 | 668,638 | 14 May 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -42.4% | -40,000 | 54,379 | 14 May 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Sale | -17.8% | $4,442,371 | $32.56 | -136,434 | 628,638 | 13 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 7.64% | 52,775 | 743,731 | 13 May 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -100% | -52,775 | 0 | 13 May 2026 | Direct | ||
| Virginia Boulet | OUST | Common Stock | Purchase | 0.73% | $41,831 | $25.23 | 1,658 | 230,000 | 11 May 2026 | Direct |
| Stephen A. Skaggs | OUST | Common Stock | Sale | -7.5% | $150,000 | $30.00 | -5,000 | 61,690 | 05 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -1.85% | $403,530 | $30.00 | -13,451 | 712,297 | 05 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 1.89% | 13,451 | 725,748 | 05 May 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -30% | -13,451 | 31,434 | 05 May 2026 | Direct |
* marks a reported price that did not pass the local price check.