MAD RIVER INVESTORS — 13F Holdings

2026 Q2  ·  34 Positions

2026 Q2 Portfolio Activity

In 2026 Q2, MAD RIVER INVESTORS maintained a portfolio of 34 distinct positions. The most significant new addition was CARNIVAL CORP LTD, now representing 1.02% of the total fund value. They heavily accumulated shares in HAWAIIAN ELEC INDS INC MTN B, increasing the position by 2718.4%. The fund also reduced its exposure to HAWAIIAN ELEC INDS INC MTN B by 96.3%.
Position History hover any row below to update
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MAD RIVER INVESTORS Boston, MA Hedge Fund / Asset Manager AUM $267M
PCA Score Concentration Risk
Risk ENB
Total Positions
34
Quarter
2026 Q2
Top Holding
TPL (46.6%)
Top 10 Concentration
91.3%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-34 of 34

MAD RIVER INVESTORS Full Holdings List — 2026 Q2

Stock History Sector / Type Port % Prev % Rank / Prev Conviction
Freshness
Change % Change Influence Shares Mkt Value Avg Cost Price Held 1st Owned Source Source Date Date Reported
TPL
TEXAS PACIFIC L...
Energy 46.58% 48.69% #1
Prev: #1
6.5
210 0.1%
P
S
285,330 $124,871,767 2013 Q2 13F Filing 2026-06-30 2026-08-03
PBT
PERMIAN BASIN R...
Bond/Debt 9.39% 7.77% #2
Prev: #2
5.8
2,012 0.2%
P
S
1,005,152 $25,169,016 2022 Q1 13F Filing 2026-06-30 2026-08-03
LB
LANDBRIDGE COMP...
Energy 7.92% 6.62% #3 2
Prev: #5
4.7
1,568 0.6%
P
S
267,953 $21,232,603 2024 Q3 13F Filing 2026-06-30 2026-08-03
HE
HAWAIIAN ELEC I...
Utilities 6.67% 7.03% #4 1
Prev: #3
3.7
4,800 0.4%
P
S
1,321,850 $17,884,631 2024 Q4 13F Filing 2026-06-30 2026-08-03
GBTC
GRAYSCALE BITCO...
ETF 6.11% 6.84% #5 1
Prev: #4
3.9
no change no change
P
S
360,139 $16,393,528 2024 Q1 13F Filing 2026-06-30 2026-08-03
MIAX
MIAMI INTL HLDG...
Financial Services 4.01% 1.14% #6 6
Prev: #12
4.6
207,750 255.7%
P
S
289,000 $10,739,240 2025 Q3 13F Filing 2026-06-30 2026-08-03
WB
WATERBRIDGE INF...
Communication Services 3.42% 2.61% #7 1
Prev: #8
1.9
-3,099 -1.1%
P
S
267,801 $9,177,525 2025 Q3 13F Filing 2026-06-30 2026-08-03
MSB
MESABI TR
Bond/Debt 3.05% 3.65% #8 1
Prev: #7
1.7
2,189 0.7%
P
S
323,735 $8,190,493 2020 Q3 13F Filing 2026-06-30 2026-08-03
WPM
WHEATON PRECIOU...
Basic Materials 2.35% 4.21% #9 3
Prev: #6
0.9
-33,098 -37.1%
P
S
56,173 $6,309,356 2017 Q2 13F Filing 2026-06-30 2026-08-03
FNV
FRANCO NEV CORP
Basic Materials 1.75% 2.10% #10 1
Prev: #9
1.2
-1,084 -4.6%
P
S
22,506 $4,691,175 2011 Q3 13F Filing 2026-06-30 2026-08-03
FBTC
FIDELITY WISE O...
Unknown 1.34% 1.49% #11 1
Prev: #10
1.0
30 0.0%
P
S
70,369 $3,592,314 2024 Q1 13F Filing 2026-06-30 2026-08-03
N/A
CARNIVAL CORP L...
Unknown 1.02% #12
Prev: #—
3.9
95,373
NEW
95,373 $2,724,801 13F Filing 2026-06-30 2026-08-03
VTI
VANGUARD INDEX ...
ETF 0.94% 1.02% #13
Prev: #13
0.4
-2,000 -22.7%
P
S
6,800 $2,516,272 2023 Q2 13F Filing 2026-06-30 2026-08-03
BTC
GRAYSCALE BITCO...
Unknown 0.79% 0.88% #14
Prev: #14
0.8
300 0.4%
P
S
81,517 $2,115,367 2024 Q3 13F Filing 2026-06-30 2026-08-03
PANW
PALO ALTO NETWO...
Technology 0.70% 0.32% #15 4
Prev: #19
1.3
no change no change
P
S
5,484 $1,870,154 2025 Q3 13F Filing 2026-06-30 2026-08-03
CBOE
CBOE GLOBAL MKT...
Financial Services 0.61% 0.68% #16 1
Prev: #15
0.7
25 0.4%
P
S
6,705 $1,627,019 2010 Q4 13F Filing 2026-06-30 2026-08-03
AAPL
APPLE INC
Technology 0.55% 0.47% #17 1
Prev: #16
0.7
-50 -1.0%
P
S
5,050 $1,461,268 2025 Q3 13F Filing 2026-06-30 2026-08-03
ORCL
ORACLE CORP
Technology 0.44% 0.43% #18
Prev: #18
1.2
no change no change
P
S
8,050 $1,179,728 2025 Q3 13F Filing 2026-06-30 2026-08-03
ICE
INTERCONTINENTA...
Financial Services 0.36% 0.43% #19 2
Prev: #17
0.6
201 2.6%
P
S
7,846 $965,876 2006 Q4 13F Filing 2026-06-30 2026-08-03
AMZN
AMAZON COM INC
Consumer Cyclical 0.30% 0.26% #20
Prev: #20
0.6
-100 -2.9%
P
S
3,400 $810,356 2025 Q3 13F Filing 2026-06-30 2026-08-03
UNH
UNITEDHEALTH GR...
Healthcare 0.26% 0.17% #21 4
Prev: #25
1.1
no change no change
P
S
1,700 $706,571 2018 Q1 13F Filing 2026-06-30 2026-08-03
CSCO
CISCO SYS INC
Technology 0.26% 0.17% #22 2
Prev: #24
1.1
no change no change
P
S
6,000 $704,760 2006 Q4 13F Filing 2026-06-30 2026-08-03
CINF
CINCINNATI FINL...
Financial Services 0.25% 0.20% #23
Prev: #23
1.1
no change no change
P
S
3,600 $666,504 2025 Q3 13F Filing 2026-06-30 2026-08-03
HE
HAWAIIAN ELEC I...
CALL
CALL Option 0.25% 0.25% #24 3
Prev: #21
0.6
1,900 4.1%
P
S
48,800 $660,264 2024 Q4 13F Filing 2026-06-30 2026-08-03
ETN
EATON CORP PLC
Industrials 0.19% 0.15% #25 2
Prev: #27
1.1
no change no change
P
S
1,200 $511,344 2025 Q3 13F Filing 2026-06-30 2026-08-03
RLI
RLI CORP
Financial Services 0.13% 0.12% #26 4
Prev: #30
1.1
no change no change
P
S
6,000 $354,420 2015 Q3 13F Filing 2026-06-30 2026-08-03
BRK/B
BERKSHIRE HATHA...
Financial Services 0.12% 0.14% #27 2
Prev: #29
0.0
-200 -24.2%
P
S
625 $312,744 2010 Q1 13F Filing 2026-06-30 2026-08-03
JNJ
JOHNSON & JOHNS...
Healthcare 0.11% 0.11% #28 3
Prev: #31
1.0
no change no change
P
S
1,200 $304,764 2015 Q3 13F Filing 2026-06-30 2026-08-03
CACI
CACI INTL INC
Technology 0.08% 0.16% #29 3
Prev: #26
0.0
-350 -43.5%
P
S
455 $210,784 2018 Q2 13F Filing 2026-06-30 2026-08-03
FRMI
FERMI INC
Real Estate 0.06% #30
Prev: #—
3.5
16,500
NEW
16,500 $151,140 2026 Q2 13F Filing 2026-06-30 2026-08-03
VIG
VANGUARD SPECIA...
ETF 0.00% 0.08%
Sold All 😨
(Was: #32)
0.0
-1,000 -100.0%
CLOSED
$— 2023 Q2 13F Filing 2026-06-30 2026-08-03
JPM
JPMORGAN CHASE ...
Financial Services 0.00% 0.15%
Sold All 😨
(Was: #28)
0.0
-1,417 -100.0%
CLOSED
$— 2008 Q2 13F Filing 2026-06-30 2026-08-03
RGLD
ROYAL GOLD INC
Basic Materials 0.00% 0.23%
Sold All 😨
(Was: #22)
0.0
-2,463 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-06-30 2026-08-03
CCL
CARNIVAL CORP
Consumer Cyclical 0.00% 1.45%
Sold All 😨
(Was: #11)
0.0
-156,181 -100.0%
CLOSED
$— 2023 Q1 13F Filing 2026-06-30 2026-08-03
Showing 1-34 of 34 holdings

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