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Mammoth Energy Services

Name Holding Trade Value Shares
Change
Change in
Stake
WC
1
Wexford Capital
Florida
$420M +$58.1M +22,240,173 New
V
2
ValueWorks
New York
$6.45M -$100K -38,321 -1%
RA
3
Royce & Associates
New York
$2.29M +$1.13M +431,626 +52%
Vanguard Group
4
Vanguard Group
Pennsylvania
$882K -$61.4K -23,513 -5%
BCM
5
Bridgeway Capital Management
Texas
$706K -$295K -113,027 -23%
Geode Capital Management
6
Geode Capital Management
Massachusetts
$510K -$58.2K -22,280 -7%
EWA
7
Exencial Wealth Advisors
Oklahoma
$447K
BlackRock
8
BlackRock
New York
$420K +$17.1K +6,561 +3%
Russell Investments Group
9
Russell Investments Group
United Kingdom
$329K
Dimensional Fund Advisors
10
Dimensional Fund Advisors
Texas
$287K -$12.4K -4,757 -3%
LFCM
11
Long Focus Capital Management
Puerto Rico
$223K +$320K +122,681 New
Renaissance Technologies
12
Renaissance Technologies
New York
$212K -$61.3K -23,500 -17%
Susquehanna International Group
13
Susquehanna International Group
Pennsylvania
$193K +$199K +76,263 +257%
YCM
14
Yaupon Capital Management
New York
$182K +$261K +100,000 New
Bank of New York Mellon
15
Bank of New York Mellon
New York
$166K
Millennium Management
16
Millennium Management
New York
$162K +$115K +44,213 +99%
Two Sigma Advisers
17
Two Sigma Advisers
New York
$153K -$11.2K -4,300 -5%
State Street
18
State Street
Massachusetts
$129K
FSC
19
Full Sail Capital
Oklahoma
$125K +$177K +67,721 New
Boston Partners
20
Boston Partners
Massachusetts
$114K -$35.7K -13,677 -18%
Stifel Financial
21
Stifel Financial
Missouri
$101K
Northern Trust
22
Northern Trust
Illinois
$81K -$15.2K -5,826 -12%
Invesco
23
Invesco
Georgia
$67K -$6.2K -2,374 -6%
NSEDCP
24
NJ State Employees Deferred Compensation Plan
New Jersey
$44K
WG
25
Winton Group
United Kingdom
$34K -$91.7K -35,140 -65%