# William Marsh Rice University: Form 13F holdings

An institutional investment manager in HOUSTON, TX. SEC CIK 1674705.

- Quarter ended: 2026-06-30
- Filed: 2026-07-23
- Reported value: $219.2m
- Positions: 2 (2 lines in the filing's table; lines for the same security and option type are added together here)
- Compared with: the 13F for the quarter ended 2026-03-31
- Filing: https://www.sec.gov/Archives/edgar/data/1674705/000106299326003813/

## Holdings

As filed, largest first. Reported value is what the manager stated at the quarter end (Jun 30, 2026), in US dollars; it is filing data, not a price. Weight is the share of the total reported value.

| Issuer | Class | Reported value | Weight | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | ---: | --- | --- |
| VANGUARD INDEX FDS | S&P 500 ETF SHS | $140.1m | 63.9% | 203,965 |  | Reduced −21,949 |
| [BLACK STONE MINERALS L P (BSM)](/companies/bsm.md) | COM UNIT | $79.1m | 36.1% | 5,663,476 |  | Unchanged |

Source: SEC EDGAR, Form 13F-HR, accession 0001062993-26-003813. Last ingested by Listed: Oct 22, 2026, 05:26 ET. No prices; not investment advice.