CIK: 0000903603
Total reported value
$264.8M
Reporting period: 2026-06-30 · Number of holdings: 3
WASHINGTON UNIVERSITY disclosed 3 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $264.8M and a quarterly turnover rate of 67.1%.
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Washington University's disclosed holdings carry a Herfindahl concentration index of 0.496 — mathematically equivalent to about 2 equally-sized positions, close to its 3 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.86), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward initiating meaningfully larger new positions than it adds to existing ones (a 23.3 percentage-point tilt) — a pattern consistent with a more contrarian, new-idea-driven approach.
Sector classification currently covers about 54% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
New buy 15675D103
Trim NU
0.0% -$10.7M
Sold out MAZE
New buy RBRK
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | NU | Nu Holdings Ltd. | Stock-Financials | 53.31% | -41.46% | — | |
| 2 | ✓ | Stock-Other | 45.99% | +45.99% | NEW | ||
| 3 | RBRK | Rubrik Inc-a | Stock-Tech | 0.69% | +0.69% | NEW |
Performance for Q3 2026
-4.5%
Performance Last 4 Quarters
+11.6%
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-06-30 | 3 | $264.8M | 67 | |
| 2026-03-31 | 2 | $160.2M | 21 | |
| 2025-12-31 | 5 | $197.8M | 10 | |
| 2025-09-30 | 3 | $178.5M | 46 | |
| 2025-06-30 | 4 | $121.4M | 0 | |
| 2025-03-31 | 2 | $110.8M | 100 | |
| 2024-12-31 | 3 | $117.5M | 0 | |
| 2024-09-30 | 4 | $154.2M | 0 | |
| 2024-06-30 | 3 | $219.7M | 0 | |
| 2024-03-31 | 5 | $270.4M | 0 | |
| 2023-12-31 | 4 | $202.6M | 0 | |
| 2023-09-30 | 10 | $277.9M | 0 | |
| 2023-06-30 | 6 | $266.8M | 0 | |
| 2023-03-31 | 11 | $379.4M | 0 | |
| 2022-12-31 | 7 | $340.5M | 0 | |
| 2022-09-30 | 7 | $295.8M | 0 | |
| 2022-06-30 | 11 | $269.7M | 0 | |
| 2022-03-31 | 7 | $277.5M | 0 | |
| 2021-12-31 | 6 | $357.1M | 0 | |
| 2021-09-30 | 6 | $344.4M | 0 | |
| 2021-06-30 | 5 | $280.4M | 100 | |
| 2021-03-31 | 3 | $116.1M | 15 | |
| 2020-12-31 | 2 | $133.6M | — |
Washington University's most significant position changes for 2026-06-30: New buy: ; Sold out: Maze Therapeutics INC (MAZE); New buy: Rubrik Inc-a (RBRK).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | ✓ | +46% | NEW | New buy | |
| 2 | RBRK | Rubrik Inc-a | +0.7% | NEW | New buy |
| 3 | MAZE | Maze Therapeutics INC | -5.2% | EXIT | Sold out |
| 4 | NU | Nu Holdings Ltd. | -41.5% | — | Unchanged |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-06-30 | 2026-07-14 | 13F-HR | View on EDGAR |
| 2026-03-31 | 2026-05-06 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-16 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-03 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-18 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-05 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-24 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-29 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-05 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-04-29 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-25 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-09 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-09 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-11 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-01-30 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-11 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-12 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-11 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-12 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-13 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-12 | 13F-HR | View on EDGAR |
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