Mammoth Energy Services Inc

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Mammoth Energy Services Inc
TickerTUSK
CIK #0001679268
CUSIP56155L108
SectorEnergy & Transportation - Oil & Gas Field Services, Nec
Address4727 Gaillardia Parkway Suite 200, Oklahoma City, OK 73142
Source [EDGAR]
CIK Filing 2011 - 2026
[0001679268] 10-K
[0001679268] 10-Q
[0001679268] 3
[0001679268] 4
[0001679268] 5
[0001679268] 8-K
[0001679268] SC 13D
[0001679268] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Davidson Charles E Mammoth Energy Services Inc [2026-06-22] 0.0
Valueworks LLC Mammoth Energy Services Inc [2023-02-10] 5.1
Adage Capital Partners GP LLC Mammoth Energy Services Inc [2022-04-21] 6.11
GPOR Distribution Trust Mammoth Energy Services Inc [2021-07-12] 21.1
Gulfport Energy Corp Mammoth Energy Services Inc [2018-02-14] 25.1
Janus Henderson Group PLC Mammoth Energy Services Inc [2018-02-13] 5.7
Gulfport Energy Corp Mammoth Energy Services Inc [2017-02-14] 24.2
Janus Capital Management LLC Mammoth Energy Services Inc [2017-02-13] 6.9
Wexford Capital LP Mammoth Energy Services Inc [2017-02-08] 54.52
Form 3/4/5 Filer 2011 - 2026
Lancaster Phillip
Mammoth Energy Services Inc
Davidson Charles E
CD Holding Company LLC
Jacobs Joseph
Wexford GP LLC
Wexford Capital LP
Amron Arthur H
Amron Holdings LLC
Jacobi Paul M
Smith Arthur L
Booker Corey J
Palm James D
Straehla Arty
Layton Mark E
GPOR Distribution Trust
MEH Sub LLC
Wexford Spectrum Trading LTD
Wexford Catalyst Trading LTD
Ross Matthew
Yellen Jonathan H
McCarthy Marc T
Heerwagen Paul K IV
LaForge Rusty Neal
Gulfport Energy Corp
Weiss Andre
Mammoth Energy Holdings LLC
Gaydosik Aaron
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Amron Arthur H
Common Stock
2025-12-11 Buy 10,000 $1.89 18,900
Smith Arthur L
Common Stock
2025-05-22 Sell 20,000 $2.51 50,200
Smith Arthur L
Common Stock
2025-05-20 Sell 50,000 $2.51 125,500
Smith Arthur L
Common Stock
2025-05-19 Sell 15,000 $2.49 37,350
Amron Arthur H
Common Stock
2024-12-12 Buy 1,000 $2.97 2,970
Booker Corey J
Common Stock
2024-11-25 Sell 15,000 $3.47 52,050
Booker Corey J
Common Stock
2024-11-22 Sell 10,000 $3.43 34,300
Booker Corey J
Common Stock
2024-11-21 Sell 6,709 $3.25 21,804
Booker Corey J
Common Stock
2024-11-20 Sell 5,000 $3.21 16,050
Booker Corey J
Common Stock
2024-11-14 Sell 3,607 $3.50 12,624
Booker Corey J
Common Stock
2024-11-13 Sell 7,100 $3.68 26,128
Booker Corey J
Common Stock
2024-11-11 Sell 3,494 $3.61 12,613
Booker Corey J
Common Stock
2024-11-08 Sell 24 $3.76 90
Booker Corey J
Common Stock
2024-11-07 Sell 165 $3.90 644
Booker Corey J
Common Stock
2024-06-12 Grant 27,856 $0.00
Palm James D
Common Stock
2024-06-12 Grant 27,856 $0.00
Smith Arthur L
Common Stock
2024-06-12 Grant 27,856 $0.00
Jacobi Paul M
Common Stock
2024-06-12 Grant 27,856 $0.00
Amron Arthur H
Common Stock
2024-06-12 Grant 27,856 $0.00
Amron Arthur H
Common Stock
2024-05-30 Buy 3,000 $3.65 10,950
showing 20 of 125 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 90 35,086,301
2025-12-31 72 34,466,416
2025-09-30 77 36,287,401
2025-06-30 67 36,519,135
2025-03-31 67 37,259,977
2024-12-31 68 37,547,653
2024-09-30 65 37,092,011
2024-06-30 68 38,518,620
2024-03-31 69 39,071,789
2023-12-31 70 39,254,191
2023-09-30 77 38,981,514
2023-06-30 74 38,117,008
Form 13F Holdings
Firm Period DFND Voting Shares
Marquette Asset Management LLC [2026-06-30] SOLE 0 109,826
Farther Finance Advisors LLC [2026-06-30] SOLE 0 107
FNY Investment Advisers LLC [2026-06-30] SOLE 76,481 76
True Wealth Design LLC [2026-06-30] SOLE 0 37
IFP Advisors LLC [2026-06-30] SOLE 27 27
Fortitude Family Office LLC [2026-06-30] SOLE 7 7
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