13F Insight
DOSSIER · 13F-HR · Q1 2026

MAD RIVER INVESTORS

$278M in tracked AUM across 32 positions as of Q1 2026.

MR
CIK 0001384484 · last filed Mar 31, 2026
Total AUM
$278M
as of Q1 2026
Holdings
32
—
positions
Whale Score
63
63
tracked
Activity
—
no data
changes this Q
AI Analysis · Q1 2026

MAD RIVER INVESTORS filed its latest 13F-HR for Q1 2026. See the latest holdings and position changes below.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
TPL
TEXAS PACIFIC LAND CORPORATI
$135M285K48.7%02
PBT
PERMIAN BASIN RTY TR
$22M1.0M7.8%03
HE
HAWAIIAN ELEC INDS INC MTN B
$20M1.4M7.3%04
GBTC
GRAYSCALE BITCOIN TRUST ETF
$19M360K6.8%05
LB
LANDBRIDGE COMPANY LLC
$18M266K6.6%06
WPM
WHEATON PRECIOUS METALS CORP
$12M89K4.2%07
MSB
MESABI TR
$10M322K3.6%08
WBI
WATERBRIDGE INFRASTRUCTURE L
$7M271K2.6%09
FNV
FRANCO NEV CORP
$6M24K2.1%10
FBTC
FIDELITY WISE ORIGIN BITCOIN
$4M70K1.5%

Filing history

2026Q1Mar 31
$278M▲ 26.5%
32 positionsView →2025Q4Dec 31
$220M▼ 6.1%
35 positionsView →2025Q3Sep 30
$234M▲ 4.7%
38 positionsView →2025Q2Jun 30
$223M▼ 5.4%
24 positionsLocked2025Q1Mar 31
$236M▲ 9.7%
24 positionsLocked2024Q4Dec 31
$215M▲ 19.4%
26 positionsLocked2024Q3Sep 30
$180M▲ 20.8%
26 positionsLocked2024Q2Jun 30
$149M▲ 3.6%
27 positionsLocked2024Q1Mar 31
$144M▲ 33.7%
27 positionsLocked2023Q4Dec 31
$108M▼ 23.8%
26 positionsLocked2023Q3Sep 30
$141M▲ 4.5%
25 positionsLocked2023Q2Jun 30
$135M▼ 4.6%
27 positionsLocked
Showing 12 of 75