CEREBRAS SYSTEMS (CBRS) Institutional Ownership & Top Holders
The most recent SEC Form 13F filings (Q2 2026) show 21 hedge funds and institutional investors holding a combined 20.5M shares of CEREBRAS SYSTEMS (CBRS), valued at $4.5B. The median portfolio weight is 1.3%.
Institutional ownership changes in CBRS reflect net buying, as the combined position increased by 20.5M shares from the previous quarter.
Among 13F filers, the funds with the highest portfolio allocation to CBRS are Washington University in St. Louis (46.0% of its 13F portfolio), Altimeter (16.2%), and Trustees of the University of Pennsylvania (6.8%). In Q2 2026, Washington University in St. Louis made the largest position increase (+46.0%).
Top 10 Institutional Holders in CEREBRAS SYSTEMS (CBRS), Ranked by Portfolio Weight
Based on the latest SEC Form 13F filings (Q2 2026).
| # | Fund | Shares | Market Value | Portfolio Weight |
|---|---|---|---|---|
| 1 | Washington University in St. Louis | 551,086 | $121.8M | 46.0% |
| 2 | Altimeter | 7,225,037 | $1.6B | 16.2% |
| 3 | Trustees of the University of Pennsylvania | 32,135 | $7.1M | 6.8% |
| 4 | Harvard Management Company | 1,081,283 | $239.0M | 5.6% |
| 5 | Coatue Management | 7,011,028 | $1.5B | 3.2% |
| 6 | Dragoneer | 400,000 | $88.4M | 3.1% |
| 7 | RIPOSTE CAPITAL | 40,000 | $8.8M | 3.0% |
| 8 | Tiger Global | 2,999,000 | $662.8M | 2.8% |
| 9 | Alpha Wave Global | 510,000 | $112.7M | 1.8% |
| 10 | Greenoaks | 150,000 | $33.1M | 1.4% |
- 21Institutional investors
- 20,516,955Shares held (disclosed)
- $4.5B13F market value
- 1.3%Median portfolio weight
Ownership History
Quarter-by-quarter share count, market value, and portfolio conviction weight (up to 5 of the heaviest weight-by-portfolio funds) of CBRS. Sourced from 13F filings; reflects long equity positions only.
Quarter-over-Quarter ActivityQ2 2026
The biggest weight-increase and weight-decrease changes among funds that hold CBRS. Deltas compare the selected filing to the previous reporting quarter.
Top buyers
- Washington University in St. Louis+46.0% · +551,086 shares
- Altimeter+16.2% · +7,225,037 shares
- Trustees of the University of Pennsylvania+6.8% · +32,135 shares
Top sellers
No notable sellers this quarter.
Options Activity
- Total calls100,000 (+100,000)
Ownership Statistics
- Funds holding
- 21
- Median weight
- 1.3%
- Largest holder
- Washington University in St. Louis · 46.0%
- Smallest holder
- Pentwater Capital Management · 0.0%
- Shares held
- 20,516,955 (+20,516,955)
All Institutional HoldersSortable · searchable
All institutional investors (Max 50) holding CBRS in the selected quarter. Click a fund name to drill into its full 13F portfolio.
| 1 | Washington University in St. Louis | 551,086 | $121.8M | 46.0% |
| 2 | Altimeter | 7,225,037 | $1.6B | 16.2% |
| 3 | Trustees of the University of Pennsylvania | 32,135 | $7.1M | 6.8% |
| 4 | Harvard Management Company | 1,081,283 | $239.0M | 5.6% |
| 5 | Coatue Management | 7,011,028 | $1.5B | 3.2% |
| 6 | Dragoneer | 400,000 | $88.4M | 3.1% |
| 7 | RIPOSTE CAPITAL | 40,000 | $8.8M | 3.0% |
| 8 | Tiger Global | 2,999,000 | $662.8M | 2.8% |
| 9 | Alpha Wave Global | 510,000 | $112.7M | 1.8% |
| 10 | Greenoaks | 150,000 | $33.1M | 1.4% |
| 11 | Broad Bay Capital Management | 62,900 | $13.9M | 1.3% |
| 12 | Trustees of Columbia University in the City of New York | 26,779 | $5.9M | 1.3% |
| 13 | Avala Global | 107,300 | $23.7M | 0.9% |
| 14 | Diameter Capital Partners | 35,000 | $7.7M | 0.8% |
| 15 | Tensor Edge Capital | 30,000 | $6.6M | 0.5% |
| 16 | Keystone | 38,711 | $8.6M | 0.5% |
| 17 | Tiger Pacific Capital | 1,000 | $221.0K | 0.1% |
| 18 | D1 Capital | 150,000 | $33.1M | 0.1% |
| 19 | Whale Rock | 50,696 | $11.2M | 0.1% |
| 20 | Situational Awareness | 10,000 | $2.2M | 0.0% |
| 21 | Pentwater Capital Management | 5,000 | $1.1M | 0.0% |
Methodology & FAQ
Methodology: How We Track CBRS Institutional Holdings
Our data is systematically aggregated directly from quarterly Form 13F-HR disclosures submitted to the U.S. Securities and Exchange Commission (SEC).
- Who must file: This dataset includes filings from U.S. institutional investment managers, hedge funds, mutual funds, university endowments, and family offices managing at least $100 million in Section 13(f) securities (including equities, options, convertibles, ETFs, and warrants).
- What is included: We capture long positions in Section 13(f) securities for CEREBRAS SYSTEMS INC (CBRS). By SEC regulation, 13F filings do not require the disclosure of short positions, non-U.S. holdings, or OTC derivatives. Listed options are excluded from portfolio weight calculations to ensure comparability across filers.
- Metric definition: “Portfolio Weight” shows how much of a fund's total reported 13F portfolio value (excluding listed options) is allocated to CBRS on the specific reporting date.
- How to use this data: Quarter-over-quarter changes in shares and portfolio weight reflect a combination of active trading and market price movements. These are descriptive metrics of fund allocation, not explicit buy or sell signals.
How do you measure hedge fund conviction and institutional concentration in CBRS?
We evaluate fund conviction by looking at portfolio weight rather than just absolute share count. By tracking how the largest holders , such as Washington University in St. Louis , Altimeter , and Trustees of the University of Pennsylvania as of Q2 2026, change their position sizing quarter-over-quarter, we help investors distinguish between deliberate position sizing changes and passive mark-to-market drift.
Does the CBRS ownership data include short interest or options?
SEC Form 13F mandates the disclosure of long positions in Section 13(f) securities, which includes equities and listed options (put and call contracts), but excludes short interest, swaps, and OTC derivatives by regulatory design. On this platform, listed options are excluded from portfolio weight calculations to ensure comparability across filers.
Are family offices and university endowments included in this CBRS data?
Yes. In addition to traditional hedge funds and large asset managers, any institutional entity exercising investment discretion over at least $100 million in Section 13(f) securities must file a Form 13F. This explicitly includes single-family offices and university endowments. If a qualifying family office or endowment holds CBRS stock, their allocation is systematically aggregated alongside traditional fund data.
When is the institutional ownership data updated, and is there a reporting lag?
Institutional investment managers are required to file their Form 13F within 45 days after the end of a calendar quarter (the standard “T+45” window). Our platform re-ingests new filings from the SEC EDGAR database on a nightly cycle, typically within 24–48 hours of publication, providing a point-in-time snapshot of reported consensus positioning for CBRS as of each filing date.