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Mammoth Energy Services
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Overview Fund Activity

130 hedge funds and large institutions have $655M invested in Mammoth Energy Services in 2018 Q4 according to their latest regulatory filings, with 18 funds opening new positions, 50 increasing their positions, 44 reducing their positions, and 24 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
130
Holders Change
-6
Holders Change %
-4.41%
% of All Funds
2.9%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.02%
New
18
Increased
50
Reduced
44
Closed
24
Calls
$1.86M
Puts
$2.1M
Net Calls
-$241K
Net Calls Change
+$424K

Top Buyers

1
Russell Investments Group
Russell Investments Group
United Kingdom
$25.3M
2
Boston Partners
Boston Partners
Massachusetts
$16.2M
3
Bank of New York Mellon
Bank of New York Mellon
New York
$6.13M
4
Allianz Asset Management
Allianz Asset Management
Germany
$13.2M
5
BCM
Bridgeway Capital Management
Texas
$4.52M

Top Sellers

1
Millennium Management
Millennium Management
New York
$2.53M
2
Citadel Advisors
Citadel Advisors
Florida
$799K
3
NC
Northpointe Capital
Michigan
$3.04M
4
HK
Horizon Kinetics
New York
$0
5
GAM
Gotham Asset Management
New York
$1.94M
Name Holding Trade Value Shares
Change 		Shares
Change %
Bank of Montreal
126
Bank of Montreal
Ontario, Canada
$3K -$162K -9,692 -98%
US Bancorp
127
US Bancorp
Minnesota
$1K +$1K +79 New
Schroder Investment Management Group
128
Schroder Investment Management Group
United Kingdom
$304 +$304 +16,900 New
HK
129
Horizon Kinetics
New York
– -$2.84M -97,506 Closed
SIM
130
Spark Investment Management
New York
– -$1.34M -46,200 Closed
Renaissance Technologies
131
Renaissance Technologies
New York
– -$1.15M -39,600 Closed
CGM
132
Centenus Global Management
New York
– -$1.11M -38,000 Closed
MAM
133
Martingale Asset Management
Massachusetts
– -$1M -34,433 Closed
Tudor Investment Corp
134
Tudor Investment Corp
Connecticut
– -$782K -26,890 Closed
LCM
135
Laurion Capital Management
New York
– -$462K -15,906 Closed
EMG
136
Ellington Management Group
Connecticut
– -$384K -13,200 Closed
AL
137
AJO LP
Pennsylvania
– -$378K -12,983 Closed
Wolverine Trading
138
Wolverine Trading
Illinois
– -$342K -11,762 Closed
CSS
139
Cubist Systematic Strategies
Connecticut
– -$314K -10,778 Closed
CIM
140
Cambria Investment Management
California
– -$279K -9,596 Closed
AIM
141
Assured Investment Management
New York
– -$259K -8,889 Closed
Wellington Management Group
142
Wellington Management Group
Massachusetts
– -$255K -8,755 Closed
State Board of Administration of Florida Retirement System
143
State Board of Administration of Florida Retirement System
Florida
– -$252K -8,657 Closed
MC
144
Menta Capital
California
– -$246K -8,457 Closed
HI
145
HBK Investments
Texas
– -$209K -7,182 Closed
Simplex Trading
146
Simplex Trading
Illinois
– -$124K -4,291 Closed
CFGS
147
Concourse Financial Group Securities
Alabama
– -$11K -372 Closed
SEI Investments
148
SEI Investments
Pennsylvania
– -$6K -229 Closed
TRCT
149
Tower Research Capital (TRC)
New York
– -$5K -184 Closed
SWP
150
Stratos Wealth Partners
Ohio
– -$4K -122 Closed
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