William Marsh Rice University

In its 13F for Q3 2025 (holdings as of September 30, 2025, filed October 31, 2025), William Marsh Rice University reported 2 stock positions worth $145.9 million. Its top holding was Black Stone Minerals (BSM) at 51.0% of the portfolio, followed by Vanguard S&P 500 ETF (VOO, 49.0%). Its holdings were unchanged from Q2 2025.

Most Recent 13F
Q2 2026
Location
HOUSTON, TX
CIK
0001674705
Portfolio Value
$145.9M (Q3 2025)
SEC Filing
0001062993-25-016407 ↗ filed Oct 31, 2025

Holdings Value

0$50.0M$100.0M$150.0M$200.0M$250.0M Q1 2024: $90.5M Q1 2024 Q2 2024: $89.3M Q2 2024 Q3 2024: $85.8M Q3 2024 Q4 2024: $215.1M Q4 2024 Q1 2025: $236.9M Q1 2025 Q2 2025: $140.4M Q2 2025 Q3 2025: $145.9M $145.9M Q3 2025 Q4 2025: $203.5M Q4 2025 Q1 2026: $220.6M Q1 2026 Q2 2026: $219.2M Q2 2026

Holdings 2 stocks · $145.9M
BSM Black Stone Minerals LP 50.99% 5,663,476 $74.4M No change
VOO Vanguard S&P 500 ETF 49.01% 116,799 $71.5M No change

Portfolio Sells Q2 2025 → Q3 2025
None this quarter.

Portfolio Buys Q2 2025 → Q3 2025
None this quarter.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 2$219.2MVOO, BSM
Q1 2026 2$220.6MVOO, BSM
Q4 2025 2$203.5MVOO, BSM
Q3 2025 2$145.9MBSM, VOO
Q2 2025 2$140.4MBSM, VOO
Q1 2025 3$236.9MVOO, BSM, AMPL
Q4 2024Amended 3$215.1MVOO, BSM, NU
Q3 2024 2$85.8MBSM, KVYO
Q2 2024 2$89.3MBSM, VERA
Q1 2024 1$90.5MBSM