Washington University holds a concentrated book of 3 reported positions worth $264.8M as of Q2 2026 (disclosed Jul 14, 2026, a ~14-day 13F lag). This quarter Cerebras Systems Inc - A first appears in 13F filings, a listing rather than a purchase; they opened Rubrik Inc-A. Their largest long position is Nu Holdings Ltd/cayman Isl-A at 53% of the reported non-option book. Cloning the disclosed picks since 2024 would be -5% (-2.8%/yr). That is a simulation of the disclosed long book, not audited returns.
Following at the filing date actually beat the quarter-end book by 2.4 points over this window.
Growth of $10,000 cloning Washington University's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~14 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: concentrated book
Excluding Nu Holdings Ltd/cayman Isl-A (53% of the book), the rest is a concentrated book:
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
100% mapped to company sectors
+1 sector below the cut, under 0.5% together
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Washington University
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Octahedron Capital Management L.P. | 2 / 3 | $40.4M |
| Sands Capital Alternatives, LLC | 2 / 3 | $102.0M |
| Deepwater Asset Management, LLC | 2 / 3 | $15.4M |
| Renaissance Capital LLC | 2 / 3 | $10.2M |
| Crosslink Capital Inc | 2 / 3 | $74.0M |
| FirstWave Capital Management LLC | 2 / 3 | $9.6M |
| Philippe Laffont | 2 / 3 | $1.9B |
| Itau Unibanco Holding S.A. | 2 / 3 | $196.6M |
Ranked by the share of each fund's own book sitting in the names it shares with Washington University: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Nu Holdings Ltd ORD SHS CL A | $141.2M | 10.57M | 53.3% | —Held | |
| 2 | Cerebras Systems Inc COM CL A | $121.8M | 551.1K | 46.0% | →Listed Newly reportable | |
| 3 | Rubrik Inc CL A | $1.8M | 22.8K | 0.7% | ▲New New position |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/903603/holdings"
Use Arkolith to show WASHINGTON UNIVERSITY's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
| Quarter | As of | Filed | Lag | Positions | Value | Form |
|---|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Jul 14, 2026 | 14d | 3 | $264.8M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 6, 2026 | 36d | 2 | $160.2M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Jan 16, 2026 | 16d | 5 | $197.8M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 3, 2025 | 34d | 3 | $178.5M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Jul 18, 2025 | 18d | 4 | $121.4M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 5, 2025 | 35d | 2 | $110.8M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Jan 24, 2025 | 24d | 3 | $117.5M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Oct 29, 2024 | 29d | 4 | $154.2M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.