Who owns Ouster (OUST)
Which tracked institutional funds hold OUST, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OUST company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
37 tracked funds added or opened OUST while 59 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
OUST’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in OUST divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 228 tracked filers holding OUST, 150 increased or opened the position and 99 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in OUST between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 19
- VANGUARD CAPITAL MANAGEMENT LLC$49M
- VANGUARD PORTFOLIO MANAGEMENT LLC$33M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$9M
- VANGUARD FIDUCIARY TRUST CO$8M
- Bastion Asset Management Inc.$5M
- Swiss Life Asset Management Ltd$5M
Full exits 19
- VANGUARD GROUP INC$102M
- Slate Path Capital LP$18M
- MILLENNIUM MANAGEMENT LLC$9M
- JANE STREET GROUP, LLC$8M
- STOREBRAND ASSET MANAGEMENT AS$8M
- TUDOR INVESTMENT CORP ET AL$3M
Largest adds
- MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.$9M
- GOLDMAN SACHS GROUP INC$7M
- Walleye Capital LLC$3M
- JANUS HENDERSON GROUP PLC$3M
- Point72 Asset Management, L.P.$3M
- BANK OF AMERICA CORP /DE/$2M
Largest trims
- BlackRock, Inc.$14M
- Squarepoint Ops LLC$8M
- ALGERT GLOBAL LLC$6M
- Handelsbanken Fonder AB$4M
- STATE STREET CORP$4M
- GEODE CAPITAL MANAGEMENT, LLC$4M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 5,557,143 | $347M | 27.0% | 2026-Q2 |
| STATE STREET CORP added | 2,052,274 | $128M | 10.0% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,021,353 | $64M | 5.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,664,383 | $49M | 3.8% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 575,900 | $36M | 2.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 1,770,252 | $33M | 2.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 476,586 | $30M | 2.3% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,450,108 | $27M | 2.1% | 2026-Q1 |
| Penn Capital Management Company, LLC added | 969,605 | $18M | 1.4% | 2026-Q1 |
| Tao Capital Management LP | 845,316 | $16M | 1.2% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP new | 246,061 | $15M | 1.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 826,233 | $15M | 1.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 225,290 | $14M | 1.1% | 2026-Q2 |
| MORGAN STANLEY added | 732,975 | $13M | 1.0% | 2026-Q1 |
| Bridgewater Associates, LP added | 183,455 | $11M | 0.9% | 2026-Q2 |
| Handelsbanken Fonder AB trimmed | 609,999 | $11M | 0.9% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 588,212 | $11M | 0.8% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 152,728 | $10M | 0.7% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 516,727 | $9M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 488,295 | $9M | 0.7% | 2026-Q1 |
| NORTHERN TRUST CORP added | 485,875 | $9M | 0.7% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 485,279 | $9M | 0.7% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 483,871 | $9M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 415,545 | $8M | 0.6% | 2026-Q1 |
| Invesco Ltd. added | 101,712 | $6M | 0.5% | 2026-Q2 |
| FMR LLC trimmed | 86,095 | $5M | 0.4% | 2026-Q2 |
| Bastion Asset Management Inc. added | 274,101 | $5M | 0.4% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 280,182 | $5M | 0.4% | 2026-Q1 |
| Swiss Life Asset Management Ltd new | 26,199 | $5M | 0.4% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 248,900 | $5M | 0.4% | 2026-Q1 |
| LORD, ABBETT & CO. LLC trimmed | 230,344 | $4M | 0.3% | 2026-Q1 |
| UBS Group AG trimmed | 225,939 | $4M | 0.3% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 217,390 | $4M | 0.3% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 216,664 | $4M | 0.3% | 2026-Q1 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC added | 210,999 | $4M | 0.3% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 209,700 | $4M | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 206,733 | $4M | 0.3% | 2026-Q1 |
| SEI INVESTMENTS CO added | 193,818 | $4M | 0.3% | 2026-Q1 |
| AWM Investment Company, Inc. new | 186,000 | $3M | 0.3% | 2026-Q1 |
| ESSEX INVESTMENT MANAGEMENT CO LLC added | 184,585 | $3M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 203,441 | $3M | 0.3% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 177,895 | $3M | 0.3% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 171,723 | $3M | 0.2% | 2026-Q1 |
| Walleye Capital LLC added | 159,143 | $3M | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 154,444 | $3M | 0.2% | 2026-Q1 |
| HERALD INVESTMENT MANAGEMENT Ltd trimmed | 150,000 | $3M | 0.2% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 43,900 | $3M | 0.2% | 2026-Q2 |
| DISCOVERY CAPITAL MANAGEMENT, LLC / CT new | 40,674 | $3M | 0.2% | 2026-Q2 |
| Nuveen, LLC trimmed | 132,744 | $2M | 0.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 132,709 | $2M | 0.2% | 2026-Q1 |
| GROUP ONE TRADING LLC added | 131,922 | $2M | 0.2% | 2026-Q1 |
| SG Americas Securities, LLC trimmed | 127,585 | $2M | 0.2% | 2026-Q1 |
| Man Group plc added | 120,038 | $2M | 0.2% | 2026-Q1 |
| Hillsdale Investment Management Inc. added | 118,720 | $2M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 118,368 | $2M | 0.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 116,838 | $2M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 112,800 | $2M | 0.2% | 2026-Q1 |
| BW Gestao de Investimentos Ltda. new | 106,000 | $2M | 0.2% | 2026-Q1 |
| Mariner, LLC added | 104,013 | $2M | 0.1% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC trimmed | 101,912 | $2M | 0.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 29,780 | $2M | 0.1% | 2026-Q2 |
| Black Swift Group, LLC added | 101,000 | $2M | 0.1% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 96,279 | $2M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 91,765 | $2M | 0.1% | 2026-Q1 |
| LPL Financial LLC added | 91,763 | $2M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 79,401 | $1M | 0.1% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. trimmed | 76,944 | $1M | 0.1% | 2026-Q1 |
| Brevan Howard Capital Management LP trimmed | 22,077 | $1M | 0.1% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC new | 75,000 | $1M | 0.1% | 2026-Q1 |
| Raiffeisen Bank International AG new | 80,000 | $1M | 0.1% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 69,380 | $1M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 4,719,021 | $102M | 7.9% | 2025-Q4 stale |
| Driehaus Capital Management LLC new | 1,523,469 | $41M | 3.2% | 2025-Q3 stale |
| Slate Path Capital LP | 829,000 | $18M | 1.4% | 2025-Q4 stale |
| T. Rowe Price Investment Management, Inc. new | 506,099 | $12M | 1.0% | 2025-Q2 stale |
| MILLENNIUM MANAGEMENT LLC trimmed | 401,185 | $9M | 0.7% | 2025-Q4 stale |
| JANE STREET GROUP, LLC trimmed | 386,354 | $8M | 0.6% | 2025-Q4 stale |
| STOREBRAND ASSET MANAGEMENT AS new | 370,882 | $8M | 0.6% | 2025-Q4 stale |
| PRUDENTIAL FINANCIAL INC added | 156,280 | $4M | 0.3% | 2025-Q3 stale |
| GILDER GAGNON HOWE & CO LLC new | 131,268 | $4M | 0.3% | 2025-Q3 stale |
| TUDOR INVESTMENT CORP ET AL trimmed | 156,517 | $3M | 0.3% | 2025-Q4 stale |
| Portolan Capital Management, LLC new | 145,148 | $3M | 0.2% | 2025-Q4 stale |
| Metavasi Capital LP new | 125,000 | $3M | 0.2% | 2025-Q2 stale |
| Trexquant Investment LP trimmed | 138,101 | $3M | 0.2% | 2025-Q4 stale |
| ArrowMark Colorado Holdings LLC new | 314,000 | $3M | 0.2% | 2025-Q1 stale |
| Penserra Capital Management LLC added | 99,681 | $3M | 0.2% | 2025-Q3 stale |
| Zweig-DiMenna Associates LLC new | 90,150 | $2M | 0.2% | 2025-Q3 stale |
| DNB Asset Management AS added | 92,096 | $2M | 0.2% | 2025-Q2 stale |
| VICTORY CAPITAL MANAGEMENT INC new | 97,346 | $2M | 0.2% | 2025-Q4 stale |
| Verition Fund Management LLC trimmed | 91,942 | $2M | 0.2% | 2025-Q4 stale |
| Engineers Gate Manager LP added | 90,951 | $2M | 0.2% | 2025-Q4 stale |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 72,007 | $2M | 0.2% | 2025-Q3 stale |
| Maxi Investments CY Ltd | 200,000 | $2M | 0.1% | 2025-Q1 stale |
| Gotham Asset Management, LLC trimmed | 62,610 | $2M | 0.1% | 2025-Q3 stale |
| Universal- Beteiligungs- und Servicegesellschaft mbH new | 61,983 | $2M | 0.1% | 2025-Q3 stale |
| Susquehanna Portfolio Strategies, LLC added | 60,382 | $2M | 0.1% | 2025-Q3 stale |
| CenterBook Partners LP added | 75,112 | $2M | 0.1% | 2025-Q4 stale |
| Qube Research & Technologies Ltd trimmed | 72,387 | $2M | 0.1% | 2025-Q4 stale |
| AMERICAN CENTURY COMPANIES INC added | 63,298 | $2M | 0.1% | 2025-Q2 stale |
| Virtu Financial LLC added | 49,239 | $1M | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.