Mad River Investors Portfolio Stock Holdings
According to the SEC 13F filed on August 3, 2026, Mad River Investors disclosed 28 stock positions valued at approximately $267.45M as of quarter-end June 30, 2026. The largest holdings include TEXAS PACIFIC LAND CORPORATI, PERMIAN BASIN RTY TR, and LANDBRIDGE COMPANY LLC.
- Report Period
- June 30, 2026
- No. of Stocks
- 28
- Portfolio Value
- $267.45M
Holdings by Sector
Mad River Investors Portfolio Holdings in Q2 2026
| Company | Symbol | Sector | Portfolio % | Shares | Change (Shares) | Change % | Value |
|---|---|---|---|---|---|---|---|
| TEXAS PACIFIC LAND CORPORATI | TPL | Energy | 46.69% | 285,330 | +210 | +0.07% | $124,871,767 |
| PERMIAN BASIN RTY TR | PBT | Energy | 9.41% | 1,005,152 | +2,012 | +0.20% | $25,169,016 |
| LANDBRIDGE COMPANY LLC | LB | Energy | 7.94% | 267,953 | +1,568 | +0.59% | $21,232,603 |
| HAWAIIAN ELEC INDS INC MTN B | HE | Utilities | 6.69% | 1,321,850 | +4,800 | +0.36% | $17,884,631 |
| GRAYSCALE BITCOIN TRUST ETF | GBTC | Other | 6.13% | 360,139 | - | - | $16,393,528 |
| MIAMI INTL HLDGS INC | MIAX | Other | 4.02% | 289,000 | +207,750 | +255.69% | $10,739,240 |
| WATERBRIDGE INFRASTRUCTURE L | WBI | Other | 3.43% | 267,801 | -3,099 | -1.14% | $9,177,525 |
| MESABI TR | MSB | Basic Materials | 3.06% | 323,735 | +2,189 | +0.68% | $8,190,493 |
| WHEATON PRECIOUS METALS CORP | WPM | Basic Materials | 2.36% | 56,173 | -33,098 | -37.08% | $6,309,356 |
| FRANCO NEV CORP | FNV | Basic Materials | 1.75% | 22,506 | -1,084 | -4.60% | $4,691,175 |
| FIDELITY WISE ORIGIN BITCOIN | FBTC | Other | 1.34% | 70,369 | +30 | +0.04% | $3,592,314 |
| VANGUARD INDEX FDS | VTI | Other | 0.94% | 6,800 | -2,000 | -22.73% | $2,516,272 |
| GRAYSCALE BITCOIN MINI TR ET | BTC | Other | 0.79% | 81,517 | +300 | +0.37% | $2,115,367 |
| PALO ALTO NETWORKS INC | PANW | Technology | 0.70% | 5,484 | - | - | $1,870,154 |
| CBOE GLOBAL MKTS INC | CBOE | Financial Services | 0.61% | 6,705 | +25 | +0.37% | $1,627,019 |
| APPLE INC | AAPL | Technology | 0.55% | 5,050 | -50 | -0.98% | $1,461,268 |
| ORACLE CORP | ORCL | Technology | 0.44% | 8,050 | - | - | $1,179,728 |
| INTERCONTINENTAL EXCHANGE IN | ICE | Financial Services | 0.36% | 7,846 | +201 | +2.63% | $965,876 |
| AMAZON COM INC | AMZN | Consumer Cyclical | 0.30% | 3,400 | -100 | -2.86% | $810,356 |
| UNITEDHEALTH GROUP INC | UNH | Healthcare | 0.26% | 1,700 | - | - | $706,571 |
| CISCO SYS INC | CSCO | Technology | 0.26% | 6,000 | - | - | $704,760 |
| CINCINNATI FINL CORP | CINF | Financial Services | 0.25% | 3,600 | - | - | $666,504 |
| EATON CORP PLC | ETN | Other | 0.19% | 1,200 | - | - | $511,344 |
| RLI CORP | RLI | Financial Services | 0.13% | 6,000 | - | - | $354,420 |
| BERKSHIRE HATHAWAY INC DEL | BRK-B | Financial Services | 0.12% | 625 | -200 | -24.24% | $312,744 |
| JOHNSON & JOHNSON | JNJ | Healthcare | 0.11% | 1,200 | - | - | $304,764 |
| CACI INTL INC | CACI | Technology | 0.08% | 455 | -350 | -43.48% | $210,784 |
| FERMI INC | FRMI | Other | 0.06% | 16,500 | +16,500 | +100.00% | $151,140 |
Showing 28 of 28 holdings in the latest reporting period.
Mad River Investors Options Holdings in Q2 2026
| Quarter | Symbol | Company | Option | Contracts | Notional Value |
|---|---|---|---|---|---|
| Q2 2026 | HE | Hawaiian Electric Industries, I | CALL | 48,800 | $660,264 |
Showing 1 of 1 options positions in the latest reporting period.
Notional value represents the total exposure of the options position.