Ouster, Inc. (OUST) Ownership
OUST ownership summary
as of October 18, 2026- Institutions
- 52.0% of shares outstanding
- Insiders
- 2.39% of shares outstanding
- Shares outstanding
- 72.1M
- Float
- 69.9M shares available to trade
- Short interest
- 10.52% 7.4M shares short
- Days to cover
- 3.41 short interest up 8.4% vs prior month
- Institutions 51.96%
- Insiders 2.39%
- Other investors 45.64%
OUST top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.71% | 5.6M | $158.0M | +266,768 (+5.0%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 3.76% | 2.7M | $77.0M | +43,556 (+1.6%) | June 30, 2026 |
| 3 | State Street Corp | 2.85% | 2.1M | $58.3M | +419,608 (+25.7%) | June 30, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 2.50% | 1.8M | $51.3M | +32,567 (+1.8%) | June 30, 2026 |
| 5 | Geode Capital Management, LLC | 2.28% | 1.6M | $46.7M | +192,873 (+13.3%) | June 30, 2026 |
| 6 | Morgan Stanley - Brokerage Accounts | 1.73% | 1.2M | $35.4M | +510,920 (+69.7%) | June 30, 2026 |
| 7 | T. Rowe Price Associates, Inc. | 1.42% | 1.0M | $29.0M | +972,980 (+2,011.4%) | June 30, 2026 |
| 8 | JPMorgan Chase & Co | 1.01% | 729K | $20.7M | +525,247 (+258.2%) | June 30, 2026 |
| 9 | Exchange Traded Concepts, LLC | 0.93% | 669K | $19.0M | +617,065 (+1,184.3%) | June 30, 2026 |
| 10 | Penn Capital Management Company LLC | 0.91% | 656K | $18.7M | −313,517 (−32.3%) | June 30, 2026 |
| 11 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.85% | 613K | $17.4M | +95,927 (+18.6%) | June 30, 2026 |
| 12 | Legal & General Group PLC | 0.83% | 602K | $17.1M | +556,405 (+1,225.3%) | June 30, 2026 |
| 13 | Renaissance Technologies Corp | 0.80% | 576K | $16.4M | +443,300 (+334.3%) | June 30, 2026 |
| 14 | Northern Trust Corp | 0.78% | 564K | $16.0M | +78,148 (+16.1%) | June 30, 2026 |
| 15 | Oberweis Asset Management Inc | 0.76% | 546K | $15.5M | +545,810 (0.0%) | June 30, 2026 |
| 16 | Charles Schwab Investment Management Inc | 0.74% | 534K | $15.2M | +45,656 (+9.4%) | June 30, 2026 |
| 17 | Citadel Advisors Llc | 0.66% | 477K | $13.5M | +259,113 (+119.1%) | June 30, 2026 |
| 18 | Vanguard Fiduciary Trust Co | 0.63% | 452K | $12.9M | +36,823 (+8.9%) | June 30, 2026 |
| 19 | Shannon River Fund Management LLC | 0.62% | 449K | $12.8M | +449,264 (0.0%) | June 30, 2026 |
| 20 | Dimensional Fund Advisors, Inc. | 0.62% | 445K | $12.7M | −38,597 (−8.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 18 holders added 6.1M shares and 2 cut 352K.
OUST top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.82% | 2.0M | $57.8M | −2,604 (−0.1%) | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.37% | 1.7M | $48.7M | −19,712 (−1.1%) | September 30, 2026 |
| 3 | Vanguard Information Technology ETF | 1.79% | 1.3M | $36.6M | +2,967 (+0.2%) | September 30, 2026 |
| 4 | Fidelity Small Cap Index | 0.95% | 685K | $19.5M | +5,858 (+0.9%) | July 31, 2026 |
| 5 | Robo Global® Robotics&Automation ETF | 0.94% | 681K | $19.3M | — | September 30, 2026 |
| 6 | iShares Russell 2000 Growth ETF | 0.86% | 620K | $17.6M | −785 (−0.1%) | September 30, 2026 |
| 7 | Stt Strt®SPDR®S&PKenshoNwEcosComposETF | 0.85% | 610K | $17.3M | — | September 30, 2026 |
| 8 | Global X Robotics & Artfcl Intllgnc ETF | 0.84% | 608K | $17.3M | — | September 30, 2026 |
| 9 | L&G ROBO Global Rbtc and Atmtn ETF | 0.82% | 588K | $16.7M | −1,161 (−0.2%) | September 30, 2026 |
| 10 | Oberweis Micro-Cap | 0.73% | 528K | $15.0M | +528,410 (0.0%) | June 30, 2026 |
| 11 | Voya Small Cap Growth I | 0.62% | 450K | $12.8M | +63,344 (+16.4%) | September 30, 2026 |
| 12 | Vanguard Russell 2000 ETF | 0.53% | 385K | $10.9M | +24,735 (+6.9%) | September 30, 2026 |
| 13 | Schwab US Small-Cap ETF™ | 0.53% | 380K | $10.8M | +252 (+0.1%) | September 30, 2026 |
| 14 | JPMorgan Small Cap Growth A | 0.47% | 340K | $9.7M | −10,014 (−2.9%) | August 31, 2026 |
| 15 | Fidelity Extended Market Index | 0.46% | 331K | $9.4M | −2,855 (−0.9%) | August 31, 2026 |
| 16 | Corgi Lithography & Smcndctr Phtncs ETF | 0.29% | 211K | $6.0M | — | September 30, 2026 |
| 17 | iShares Micro-Cap ETF | 0.29% | 209K | $5.9M | −1,441 (−0.7%) | September 30, 2026 |
| 18 | DWS Small Cap Core S | 0.25% | 182K | $5.2M | — | August 31, 2026 |
| 19 | DNB Fund Disrpt Opps A EUR Acc | 0.25% | 181K | $5.1M | — | August 31, 2026 |
| 20 | iShares Automation&Robotics ETF USD Acc | 0.25% | 179K | $5.1M | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OUST insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-22 | Mark Frichtl | Sell | $30.00 | 400 | $12,000 |
| 2026-04-21 | Stephen A Skaggs | Sell | $28.00 | 5,000 | $140,000 |
| 2026-04-20 | Mark Frichtl | Sell | $26.58 | 60,000 | $1.6M |
| 2026-04-17 | Mark Frichtl | Sell | $25.15 | 30,000 | $754,500 |
| 2026-04-16 | Megan Chung | Sell | $24.70 | 5,837 | $144,174 |
| 2026-04-15 | Mark Frichtl | Sell | $24.00 | 20,000 | $480,000 |
| 2026-04-14 | Mark Frichtl | Sell | $22.76 | 40,000 | $910,400 |
| 2026-03-25 | Mark Frichtl | Sell | $20.94 | 40,000 | $837,600 |
| 2026-03-19 | Ted L Tewksbury III | Sell | $20.00 | 1,695 | $33,900 |
| 2026-03-12 | Mark Frichtl | Sell | $23.43 | 15,689 | $367,593 |
| 2026-03-12 | Megan Chung | Sell | $23.43 | 9,593 | $224,764 |
| 2026-03-12 | Darien Spencer | Sell | $23.43 | 10,938 | $256,277 |
| 2026-03-12 | Charles Angus Pacala | Sell | $23.43 | 24,657 | $577,714 |
| 2026-03-06 | Virginia Boulet | Buy | $20.95 | 6,500 | $136,175 |
| 2026-01-16 | Megan Chung | Sell | $27.24 | 5,837 | $159,000 |
| 2025-12-19 | Ted L Tewksbury III | Sell | $21.47 | 1,695 | $36,392 |
| 2025-11-11 | Ted L Tewksbury III | Sell | $25.38 | 1,695 | $43,019 |
| 2025-10-17 | Megan Chung | Sell | $31.02 | 5,837 | $181,064 |
| 2025-09-12 | Charles Angus Pacala | Sell | $28.46 | 37,992 | $1.1M |
| 2025-09-12 | Darien Spencer | Sell | $28.46 | 18,274 | $520,078 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OUST shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OUST
Institutional investors own 52.0% of Ouster's shares and insiders 2.39%. The largest holder is BlackRock Inc with 7.71% of the shares (5.6M), as of June 30, 2026. Among the top 20 institutions, 18 added shares and 2 reduced their stake in the latest filings. Short interest is 10.52% of the float, or 3.41 days of average trading volume. The share count rose 5,794.0% since 2019.
Related: OUST analyst forecast, OUST key metrics. See the OUST stock overview for the latest quote and news.
OUST ownership FAQ
Who owns the most Ouster stock?
The largest shareholders of Ouster are BlackRock Inc (7.71%), Vanguard Capital Management, LLC (3.76%), State Street Corp (2.85%), Vanguard Portfolio Management, LLC (2.50%), Geode Capital Management, LLC (2.28%).
What percentage of Ouster is owned by institutions?
Institutions hold 52.0% of Ouster's shares outstanding; insiders hold 2.39%.
Which funds own Ouster?
The largest fund holders of Ouster are Vanguard MStar Total Stk Mkt Idx Invest (2.82%), iShares Russell 2000 ETF (2.37%), Vanguard Information Technology ETF (1.79%), Fidelity Small Cap Index (0.95%), Robo Global® Robotics&Automation ETF (0.94%).
What is Ouster's short interest?
7.4M shares of Ouster were sold short, 10.52% of the float; at the average daily volume it would take 3.41 days to cover.
Are insiders buying or selling Ouster?
Of the latest 20 reported insider transactions in Ouster (since September 12, 2025), 1 were purchases and 19 were sales.
How many shares of Ouster are outstanding?
Ouster has 72.1M shares outstanding, of which 69.9M are in the public float.