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Mammoth Energy Services
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Overview Fund Activity

65 hedge funds and large institutions have $76.1M invested in Mammoth Energy Services in 2025 Q1 according to their latest regulatory filings, with 9 funds opening new positions, 20 increasing their positions, 22 reducing their positions, and 9 closing their positions.

Holders
65
Holders Change
-1
Holders Change %
-1.52%
% of All Funds
0.88%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
9
Increased
20
Reduced
22
Closed
9
Calls
$50K
Puts
$89K
Net Calls
-$39K
Net Calls Change
-$198K

Top Buyers

1
Citadel Advisors
1
Citadel Advisors
Florida
$376K
2
Millennium Management
2
Millennium Management
New York
$120K
3
NS
3
NBC Securities
Alabama
$116K
4
Adage Capital Partners
4
Adage Capital Partners
Massachusetts
$8.47M
5
NL
5
Nuveen LLC
North Carolina
$75.2K

Top Sellers

1
RC
1
Rangeley Capital
Connecticut
$420K
2
RA
2
Royce & Associates
New York
$2.64M
3
BCM
3
Bridgeway Capital Management
Texas
$685K
4
JPMorgan Chase & Co
4
JPMorgan Chase & Co
New York
$45.8K
5
Goldman Sachs
5
Goldman Sachs
New York
$136K
Name Market Value Shares Shares
Change 		Shares
Change %
WC
1
Wexford Capital
Florida
$45M 22,068,212 – –
Adage Capital Partners
2
Adage Capital Partners
Massachusetts
$8.47M 4,150,000 +50,000 +1%
V
3
ValueWorks
New York
$5.73M 2,808,860 -14,325 -0.5%
BlackRock
4
BlackRock
New York
$2.98M 1,460,797 -15,088 -1%
RA
5
Royce & Associates
New York
$2.64M 1,293,637 -156,285 -11%
Dimensional Fund Advisors
6
Dimensional Fund Advisors
Texas
$2.04M 1,001,204 +9,981 +1%
Vanguard Group
7
Vanguard Group
Pennsylvania
$1.93M 944,535 -2,162 -0.2%
Geode Capital Management
8
Geode Capital Management
Massachusetts
$1.11M 545,164 +7,788 +1%
State Street
9
State Street
Massachusetts
$821K 402,363 – –
BCM
10
Bridgeway Capital Management
Texas
$685K 335,685 -124,589 -27%
RC
11
Rangeley Capital
Connecticut
$420K 205,880 -226,458 -52%
Northern Trust
12
Northern Trust
Illinois
$414K 203,027 -3,012 -1%
Citadel Advisors
13
Citadel Advisors
Florida
$376K 184,071 +166,206 +930%
CM
14
CastleKnight Management
New York
$342K 167,433 – –
EF
15
Empowered Funds
Pennsylvania
$326K 159,685 +13,111 +9%
Renaissance Technologies
16
Renaissance Technologies
New York
$276K 135,272 +1,700 +1%
Bank of New York Mellon
17
Bank of New York Mellon
New York
$247K 121,249 -744 -0.6%
Stifel Financial
18
Stifel Financial
Missouri
$215K 105,572 -53 -0.1%
Susquehanna International Group
19
Susquehanna International Group
Pennsylvania
$191K 93,489 +33,937 +57%
Morgan Stanley
20
Morgan Stanley
New York
$186K 91,234 +255 +0.3%
Charles Schwab
21
Charles Schwab
California
$144K 70,674 – –
Goldman Sachs
22
Goldman Sachs
New York
$136K 66,588 -22,854 -26%
Wellington Management Group
23
Wellington Management Group
Massachusetts
$126K 61,799 +12,238 +25%
Osaic Holdings
24
Osaic Holdings
Arizona
$121K 59,550 – –
Millennium Management
25
Millennium Management
New York
$120K 58,674 +58,674 New
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