MRM-Horizon Advisors
Latest statistics and disclosures from Mad River Investors's latest quarterly 13F-HR filing:
- Top 5 stock holdings are TPL, PBT, HE, GBTC, LB, and represent 77.21% of Mad River Investors's stock portfolio.
- Added to shares of these 9 stocks: HE, MSB, WBI, PBT, MIAX, LB, BTC, CCL, JPM.
- Reduced shares in these 10 stocks: WPM, VTI, TPL, C, RSP, KMB, BRK.B, VIG, RLI, RGLD.
- Sold out of its positions in C, RSP, KMB.
- Mad River Investors was a net seller of stock by $-906k.
- Mad River Investors has $278M in assets under management (AUM), dropping by 26.52%.
- Central Index Key (CIK): 0001384484
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Portfolio Holdings for Mad River Investors
Mad River Investors holds 31 positions in its portfolio as reported in the March 2026 quarterly 13F filing
| Company (Ticker) | Portfolio Weight | Valued At | Change in Shares | Share Count | Share Price | |
|---|---|---|---|---|---|---|
| Texas Pacific Land Corp (TPL) | 48.7 | $135M | 285k | 474.56 |
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| Permian Basin Rty Tr Unit Ben Int (PBT) | 7.8 | $22M | 1.0M | 21.52 |
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| Hawaiian Elec Inds Inc Mtn B Call Call Option (Principal) (HE) | 7.3 | $20M | +5% | 1.4M | 14.84 |
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| Grayscale Bitcoin Trust Etf Shs Rep Com Ut (GBTC) | 6.8 | $19M | 360k | 52.76 |
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| Landbridge Company Cl A (LB) | 6.6 | $18M | 266k | 69.05 |
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| Wheaton Precious Metals Corp (WPM) | 4.2 | $12M | -8% | 89k | 131.01 |
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| Mesabi Tr Ctf Ben Int (MSB) | 3.6 | $10M | +8% | 322k | 31.50 |
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| Waterbridge Infrastructure L Cl A Shs Repstg (WBI) | 2.6 | $7.3M | +5% | 271k | 26.79 |
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| Franco-Nevada Corporation (FNV) | 2.1 | $5.8M | 24k | 247.05 |
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| Fidelity Wise Origin Bitcoin SHS (FBTC) | 1.5 | $4.2M | 70k | 59.03 |
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| Carnival Corp Common Stock (CCL) | 1.5 | $4.0M | 156k | 25.88 |
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| Miami Intl Hldgs (MIAX) | 1.1 | $3.2M | +8% | 81k | 38.92 |
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| Vanguard Index Fds Total Stk Mkt (VTI) | 1.0 | $2.8M | -27% | 8.8k | 320.81 |
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| Grayscale Bitcoin Mini Tr Et Shs New (BTC) | 0.9 | $2.4M | +4% | 81k | 29.99 |
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| CBOE Holdings (CBOE) | 0.7 | $1.9M | 6.7k | 281.06 |
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| Apple (AAPL) | 0.5 | $1.3M | 5.1k | 253.79 |
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| Intercontinental Exchange (ICE) | 0.4 | $1.2M | 7.6k | 157.29 |
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| Oracle Corporation (ORCL) | 0.4 | $1.2M | 8.1k | 147.11 |
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| Palo Alto Networks (PANW) | 0.3 | $879k | 5.5k | 160.32 |
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| Amazon (AMZN) | 0.3 | $729k | 3.5k | 208.27 |
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| Royal Gold (RGLD) | 0.2 | $627k | -7% | 2.5k | 254.49 |
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| Cincinnati Financial Corporation (CINF) | 0.2 | $567k | 3.6k | 157.35 |
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| Cisco Systems (CSCO) | 0.2 | $466k | 6.0k | 77.59 |
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| UnitedHealth (UNH) | 0.2 | $460k | 1.7k | 270.59 |
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| Caci Intl Cl A (CACI) | 0.2 | $438k | 805.00 | 543.87 |
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| Eaton Corp SHS (ETN) | 0.2 | $429k | 1.2k | 357.67 |
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| JPMorgan Chase & Co. (JPM) | 0.2 | $417k | 1.4k | 294.16 |
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| Berkshire Hathaway Inc Del Cl B New (BRK.B) | 0.1 | $395k | -26% | 825.00 | 479.20 |
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| Rli (RLI) | 0.1 | $342k | -20% | 6.0k | 57.04 |
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| Johnson & Johnson (JNJ) | 0.1 | $293k | 1.2k | 244.44 |
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| Vanguard Specialized Funds Div App Etf (VIG) | 0.1 | $215k | -37% | 1.0k | 215.06 |
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Past Filings by Mad River Investors
SEC 13F filings are viewable for Mad River Investors going back to 2010
- Mad River Investors 2026 Q1 filed April 23, 2026
- Mad River Investors 2025 Q4 filed Feb. 6, 2026
- Mad River Investors 2025 Q3 filed Oct. 14, 2025
- Mad River Investors 2025 Q2 filed July 8, 2025
- Mad River Investors 2025 Q1 filed April 22, 2025
- Mad River Investors 2024 Q4 filed Jan. 16, 2025
- Mad River Investors 2024 Q3 filed Oct. 22, 2024
- Mad River Investors 2024 Q2 filed Aug. 2, 2024
- Mad River Investors 2024 Q1 filed April 19, 2024
- Mad River Investors 2023 Q4 filed Jan. 26, 2024
- Mad River Investors 2023 Q3 filed Oct. 18, 2023
- Mad River Investors 2023 Q2 filed Aug. 3, 2023
- Mad River Investors 2023 Q1 filed May 4, 2023
- Mad River Investors 2022 Q4 filed Feb. 6, 2023
- Mad River Investors 2022 Q3 filed Oct. 26, 2022
- Mad River Investors 2022 Q2 filed Aug. 8, 2022