13F Insight
DOSSIER · 13F Holders · Q4 2025Defensive growthQuality
TUSK

MAMMOTH ENERGY SVCS INC

91 institutions still hold MAMMOTH ENERGY SVCS INC as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 56155L108·91 13F holders·last filed Dec 31, 2025
Market cap
—
▲ 0.5%
vs prior quarter
13F value held
$69M
50.0% inst. owned
of float
Holders
91
-66 QoQ
filers reporting
Activity
+41 / −88
+735 added · −667 reduced
this quarter
Concentration
59.24%
WEXFORD CAPITAL LP #1
top holder share
AI Holders Summary · Q4 2025

91 institutions reported TUSK in Q4 2025. WEXFORD CAPITAL LP leads at 59.2% of the visible book. -66 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
WEXFORD CAPITAL LP
CIK 0001048462
$41M22.1M7.88%Q4 202502
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$11M4.6M0.02%Q1 202603
BlackRock, Inc.
CIK 0002012383
$4M1.5M0.00%Q1 202604
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$2M819K0.00%Q1 202605
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$2M686K0.00%Q1 202606
Peapod Lane Capital LLC
CIK 0002050979
$2M600K1.24%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$1M611K0.00%Q1 202608
STATE STREET CORP
CIK 0000093751
$1M422K0.00%Q1 202609
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 0001107261
$814,167332K0.02%Q1 202610
Empowered Funds, LLC
CIK 0001592828
$591,217241K0.00%Q1 202611
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$568,331232K0.00%Q1 202612
GOLDMAN SACHS GROUP INC
CIK 0000886982
$547,549223K0.00%Q1 202613
NORTHERN TRUST CORP
CIK 0000073124· Index
$458,464187K0.00%Q1 202614
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$416,821170K0.00%Q1 202615
CITADEL ADVISORS LLC
CIK 0001423053
$407,205220K0.00%Q4 202516
LOS ANGELES CAPITAL MANAGEMENT LLC
CIK 0001177206
$399,984163K0.00%Q1 202617
Boston Partners
CIK 0001386060
$378,250154K0.00%Q1 202618
MORGAN STANLEY
CIK 0000895421
$374,172153K0.00%Q1 202619
Vanguard Portfolio Management
CIK 0002100121· Index
$343,355140K0.00%Q1 202620
Bank of New York Mellon Corp
CIK 0001390777
$324,720133K0.00%Q1 2026
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