MAMMOTH ENERGY SERVICES INC

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TUSK·56155L108·US·Common Stock·Industrials - Conglomerates-13D/G

TUSK (MAMMOTH ENERGY SERVICES INC) is held by 60 institutional investors as of Q2 2026. Largest holders: ADAGE CAPITAL PARTNERS GP, L.L.C. ($14.9M), VANGUARD CAPITAL MANAGEMENT LLC ($3.4M), DIMENSIONAL FUND ADVISORS LP ($2.2M). Net institutional sentiment: Mixed.

60

Holders

(6 Elite)

$38M

Total Value

52% (69)

Consensus

36 buying - 33 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)46

Insider (Form 4)33

Activist (13D/13G)36

Congressional (STOCK Act)37

Holder Quality

32

★★★★★

Elite

62

★★★★

Strong

40

★★★

Solid

78

★★

Below

15

★

Weak

Held by 60 funds

6 elite

Who's Trading

Source dates: Price Oct 12, 2026 · Insiders Sep 17, 2026 · Activists Jun 22, 2026 · Congress none

InsiderPLPlaumann Mark LawrenceBuy $15KSep 16, 2026

InsiderLPLancaster PhillipOther 68K shJun 26, 2026

ActivistCECharles E. Davidson13.4%Jun 22, 2026

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Top Holders

Top Holders (60)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
AGADAGE CAPITAL PARTNERS GP, L.L.C.	Unchanged	4.6M	$14.9M	0.0%	-6.62%	0
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	1.1M(+29.4%)	$3.4M	0.0%	+6.47%	33
DIMENSIONAL FUND ADVISORS LP	Increased	691,667(+0.8%)	$2.2M	0.0%	-29.76%	26
JANE STREET GROUP, LLC	Increased	506,662(+2116.9%)	$1.6M	0.0%	-12.98%	41
CITADEL ADVISORS LLC	Increased	452,163(+36.5%)	$1.5M	0.0%	+7.61%	33
BlackRock, Inc.	Decreased	407,976(-72.0%)	$1.3M	0.0%	+1.54%	0
MWMARSHALL WACE, LLP	New	395,583	$1.3M	0.0%	-13.54%	35
Russell Investments Group, Ltd.	Increased	329,821(+384.8%)	$1.1M	0.0%	-5.01%	41
GEODE CAPITAL MANAGEMENT, LLC	Decreased	306,028(-49.9%)	$995,730	0.0%	-40.93%	0
RENAISSANCE TECHNOLOGIES LLC	Increased	292,280(+26.0%)	$949,910	0.0%	-1.02%	31
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	New	290,096	$942,812	0.0%	-13.54%	35
Empowered Funds, LLC	Unchanged	241,313	$784,267	0.0%	-7.64%	0
AQR CAPITAL MANAGEMENT LLC	Increased	177,824(+166.5%)	$577,928	0.0%	-4.72%	39
VFVANGUARD FIDUCIARY TRUST CO	Decreased	161,791(-4.9%)	$525,821	0.0%	+14.23%	0
MORGAN STANLEY	Decreased	133,560(-12.6%)	$434,070	0.0%	+10.99%	0
Centiva Capital, LP	Increased	130,870(+17.8%)	$425,328	0.0%	+18.05%	28
MILLENNIUM MANAGEMENT LLC	New	124,186	$403,604	0.0%	-13.54%	33
STIFEL FINANCIAL CORP	Unchanged	105,572	$343,109	0.0%	+97.58%	0
STATE STREET CORP	Decreased	101,864(-75.9%)	$331,058	0.0%	-38.01%	0
BANK OF AMERICA CORP /DE/	Increased	97,046(+279.3%)	$315,400	0.0%	-10.26%	26

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer