Holder evidence
50
SEC ownership of Ouster, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001816581.
Lead holder
BlackRock, Inc.
13D/G signal
BlackRock, Inc.
Latest evidence
26 May 2026
- CIK
- 0001816581
- Symbol
- OUST on Nasdaq
- Location
- San Francisco, CA
- SEC evidence mix
- 13F, 13D/G, and 3/4/5
- Lead holder
- BlackRock, Inc.
- Latest large-stake holder
- BlackRock, Inc.
- Latest evidence date
- 26 May 2026
Issuer identity
Ownership snapshot
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.
Lead holder
BlackRock, Inc.
13D/G signal
BlackRock, Inc.
Evidence rows
50
Latest as of
26 May 2026
13F
13D/G
3/4/5
Lead comparable stake: 7.4%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Rank 1 holder
BlackRock, Inc.
13F
13D/G
- Ownership
- 7.4%
- Position
- $97.18M
Rank 2 holder
Charles Angus Pacala
3/4/5
- Ownership
- 1.8%
- Position
- $20.19M
Rank 3 holder
Kenneth P. Gianella
3/4/5
- Ownership
- 0.59%
- Position
- $6.53M
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
7.4%
from 13D/G
|
$97,184,189
5,290,375 shares
|
— | 31 Mar 2026 |
| Charles Angus Pacala |
3/4/5
President and CEO, Director
|
1.8%
|
$20,189,401
1,099,036 shares
|
-$2,273,518 | 12 Apr 2026 |
| Kenneth P. Gianella |
3/4/5
Chief Financial Officer
|
0.59%
|
$6,527,833
355,351 shares
|
— | 11 Apr 2026 |
| Darien Spencer |
3/4/5
Chief Operating Officer
|
0.57%
|
$15,406,447
342,366 shares
|
-$2,459,642 | 26 May 2026 |
| Mark Frichtl |
3/4/5
Chief Technology Officer
|
0.49%
|
$13,271,580
294,924 shares
|
-$30,427,958 | 22 May 2026 |
| Virginia Boulet |
3/4/5
Director
|
0.38%
|
$5,786,800
230,000 shares
|
+$178,006 | 11 May 2026 |
| Megan Chung |
3/4/5
General Counsel and Secretary
|
0.36%
|
$5,281,749
213,836 shares
|
-$1,518,246 | 16 Apr 2026 |
| Cyrille Jacquemet |
3/4/5
Chief Revenue Officer
|
0.21%
|
$4,926,300
123,158 shares
|
-$727,320 | 26 May 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: -$39,459,511.
Buys
$178,006
Insiders: 1
Sells
$39,637,517
Insiders: 8
Net
-$39,459,511
Shares: -1,212,998
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 8,158
Shares: 1,221,156
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 8,158 | 987,334 | $178,006 | $33,244,340 | -$33,066,334 |
| 3-6 | 0 | 81,068 | $0 | $2,032,778 | -$2,032,778 |
| 6-9 | 0 | 106,310 | $0 | $3,035,111 | -$3,035,111 |
| 9-12 | 0 | 46,444 | $0 | $1,325,287 | -$1,325,287 |
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
Lead holder
Charles Angus Pacala
Net 12M change
-$39,459,511
Latest report
26 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Charles Angus Pacala | President and CEO, Director | $20,189,401 | -$2,273,518 | -10% | Median | 12 Apr 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 | ||
| Darien Spencer | Chief Operating Officer | $15,406,447 | -$2,459,642 | -14% | Filing P/S | 26 May 2026 |
| 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 | $13,271,580 | -$30,427,958 | -70% | Filing P/S | 22 May 2026 |
| Shauna McIntyre | Pres. of Ouster Automotive | $10,769,906 | Mixed | 22 Oct 2021 | ||
| Kenneth P. Gianella | Chief Financial Officer | $6,527,833 | Median | 11 Apr 2026 | ||
| Virginia Boulet | Director | $5,786,800 | +$178,006 | +3.2% | Filing P/S | 11 May 2026 |
| Megan Chung | General Counsel and Secretary | $5,281,749 | -$1,518,246 | -22% | Filing P/S | 16 Apr 2026 |
| Cyrille Jacquemet | Chief Revenue Officer | $4,926,300 | -$727,320 | -13% | Filing P/S | 26 May 2026 |
| Adam Dolinko | General Counsel And Secretary | $4,896,709 | Mixed | 13 Dec 2022 | ||
| Ted L. Tewksbury III | Director | $2,439,380 | -$113,311 | -4.4% | Filing P/S | 19 Mar 2026 |
| Stephen A. Skaggs | Director | $1,850,700 | -$290,000 | -14% | Filing P/S | 05 May 2026 |
| Mark Weinswig | Chief Financial Officer | $1,685,777 | Filing P/S | 12 Dec 2024 | ||
| Susan Heystee | Director | $1,221,436 | -$1,827,522 | -60% | Filing P/S | 21 May 2026 |
| Emmanuel T. Hernandez | Director | $1,051,790 | Mixed | 05 Jan 2023 | ||
| Sundari Mitra | Director | $954,294 | Mixed | 05 Jan 2023 | ||
| Ernest E. Maddock | Director | $920,896 | Mixed | 18 Jun 2025 |
Recent insider transactions for Ouster, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Reported value | Reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
| Mark Frichtl | OUST | Common Stock | Sale | -2.88% | $637,160 | $30.13 | -21,149 | 712,297 | 04 May 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 2.97% | 21,149 | 733,446 | 04 May 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -32% | -21,149 | 44,885 | 04 May 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Sale | -0.06% | $12,000 | $30.00 | -400 | 712,297 | 22 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 0.06% | 400 | 712,697 | 22 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -0.6% | -400 | 66,034 | 22 Apr 2026 | Direct | ||
| Stephen A. Skaggs | OUST | Common Stock | Sale | -6.97% | $140,000 | $28.00 | -5,000 | 66,690 | 21 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -7.77% | $1,713,861 | $28.56 | -60,000 | 712,297 | 21 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 8.42% | 60,000 | 772,297 | 21 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -47.5% | -60,000 | 66,434 | 21 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Sale | -7.77% | $1,594,806 | $26.58 | -60,000 | 712,297 | 20 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 8.42% | 60,000 | 772,297 | 20 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -32.2% | -60,000 | 126,434 | 20 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Sale | -4.04% | $754,395 | $25.15 | -30,000 | 712,297 | 17 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 4.21% | 30,000 | 742,297 | 17 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -13.9% | -30,000 | 186,434 | 17 Apr 2026 | Direct | ||
| Megan Chung | OUST | Common Stock | Sale | -2.66% | $144,174 | $24.70 | -5,837 | 213,836 | 16 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Sale | -2.73% | $480,000 | $24.00 | -20,000 | 712,297 | 15 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 2.81% | 20,000 | 732,297 | 15 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -8.46% | -20,000 | 216,434 | 15 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Sale | -5.32% | $910,248 | $22.76 | -40,000 | 712,297 | 14 Apr 2026 | Direct |
| Mark Frichtl | OUST | Common Stock | Options Exercise | 5.62% | 40,000 | 752,297 | 14 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Non-Qualified Stock Option | Options Exercise | -14.5% | -40,000 | 236,434 | 14 Apr 2026 | Direct | ||
| Charles Angus Pacala | OUST | Common Stock | Award | 14.4% | 138,376 | 1,099,036 | 12 Apr 2026 | Direct | ||
| Darien Spencer | OUST | Common Stock | Award | 14.2% | 46,125 | 371,375 | 11 Apr 2026 | Direct | ||
| Kenneth P. Gianella | OUST | Common Stock | Award | 18.4% | 55,351 | 355,351 | 11 Apr 2026 | Direct | ||
| Megan Chung | OUST | Common Stock | Award | 26.6% | 46,125 | 219,673 | 11 Apr 2026 | Direct | ||
| Mark Frichtl | OUST | Common Stock | Award | 11.8% | 75,415 | 712,297 | 11 Apr 2026 | Direct |
* indicates a reported price that failed the local validity check.