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Mammoth Energy Services

Name Holding Trade Value Shares
Change
Change in
Stake
WC
1
Wexford Capital
Florida
$26M
V
2
ValueWorks
New York
$4.28M +$560K +482,647 +15%
BCM
3
Bridgeway Capital Management
Texas
$556K +$139K +120,100 +34%
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$550K -$333K -286,841 -38%
Vanguard Group
5
Vanguard Group
Pennsylvania
$482K -$83.9K -72,361 -15%
EI
6
EAM Investors
California
$348K +$342K +295,107 New
BlackRock
7
BlackRock
New York
$347K -$667K -575,279 -66%
WG
8
Winton Group
United Kingdom
$345K +$223K +192,021 +192%
Two Sigma Advisers
9
Two Sigma Advisers
New York
$335K -$29.7K -25,600 -8%
Invesco
10
Invesco
Georgia
$275K -$35.1K -30,293 -12%
D.E. Shaw & Co
11
D.E. Shaw & Co
New York
$202K -$58.5K -50,464 -23%
Geode Capital Management
12
Geode Capital Management
Massachusetts
$149K -$103K -89,104 -41%
Bank of New York Mellon
13
Bank of New York Mellon
New York
$107K +$7.24K +6,244 +7%
Squarepoint
14
Squarepoint
New York
$103K +$101K +87,137 New
Jane Street
15
Jane Street
New York
$83K +$81.2K +69,988 New
TF
16
Trek Financial
Arizona
$77K +$75.4K +64,977 New
Millennium Management
17
Millennium Management
New York
$67K +$65.9K +56,805 New
Stifel Financial
18
Stifel Financial
Missouri
$66K +$9.9K +8,537 +18%
Charles Schwab
19
Charles Schwab
California
$62K -$22.6K -19,487 -27%
Northern Trust
20
Northern Trust
Illinois
$58K -$131K -112,602 -70%
Susquehanna International Group
21
Susquehanna International Group
Pennsylvania
$40K +$39.4K +33,931 New
NJBEST
22
New Jersey Better Educational Savings Trust
New Jersey
$37K -$11.6K -10,000 -24%
PP
23
Paloma Partners
Connecticut
$36K +$35.2K +30,300 New
Two Sigma Investments
24
Two Sigma Investments
New York
$32K -$187K -160,890 -86%
First Trust Advisors
25
First Trust Advisors
Illinois
$31K +$2.2K +1,898 +8%