Mammoth Energy Services, Inc.
DE ˙ DB ˙ US56155L1089
2,78 € ↑0,10 (3,73%)
2026-06-01
AKTIENPREIS
SecurityDE:5M8 / Mammoth Energy Services, Inc.
InstitutionFmr Llc
Latest Disclosed Ownership12,142 shares
Latest Disclosed Value $ 29,748
Fmr Llc reports 9.33% increase in ownership of 5M8 / Mammoth Energy Services, Inc.

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 12,142 shares of Mammoth Energy Services, Inc. (DE:5M8) valued at $26,712 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 11,106 shares of Mammoth Energy Services, Inc.. This represents a change in shares of 9.33% during the quarter. The current value of the position is $33,755 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MAMMOTH ENERGY SVCS COM 56155L108 12,142 1,036 9.33 30 45.00 0.0000
2026-02-17 2025-12-31 13F MAMMOTH ENERGY SVCS COM 56155L108 11,106 -1,540 -12.18 21 -28.57 0.0000
2025-11-13 2025-09-30 13F MAMMOTH ENERGY SVCS COM 56155L108 12,646 1,732 15.87 29 -6.67 0.0000
2025-08-14 2025-06-30 13F MAMMOTH ENERGY SVCS COM 56155L108 10,914 -2,520 -18.76 31 11.11 0.0000
2025-05-12 2025-03-31 13F MAMMOTH ENERGY SVCS COM 56155L108 13,434 4,144 44.61 27 0.00 0.0000
2025-02-13 2024-12-31 13F MAMMOTH ENERGY SVCS COM 56155L108 9,290 -1,677 -15.29 28 -38.64 0.0000
2024-11-13 2024-09-30 13F MAMMOTH ENERGY SVCS COM 56155L108 10,967 2,705 32.74 45 62.96 0.0000
2024-08-13 2024-06-30 13F MAMMOTH ENERGY SVCS COM 56155L108 8,262 1,164 16.40 27 8.00 0.0000
2024-05-13 2024-03-31 13F MAMMOTH ENERGY SVCS COM 56155L108 7,098 -883 -11.06 26 -28.57 0.0000
2024-02-13 2023-12-31 13F MAMMOTH ENERGY SVCS COM 56155L108 7,981 1,737 27.82 36 25.00 0.0000
2023-11-13 2023-09-30 13F MAMMOTH ENERGY SVCS COM 56155L108 6,244 14 0.22 29 -6.67 0.0000
2023-08-11 2023-06-30 13F MAMMOTH ENERGY SVCS COM 56155L108 6,230 4 0.06 30 15.38 0.0000
2023-08-11 2023-03-31 13F/A-1 MAMMOTH ENERGY SVCS COM 56155L108 6,226 0 0.00 26 -50.94 0.0000
2023-05-11 2023-03-31 13F MAMMOTH ENERGY SVCS COM 56155L108 6,226 0 26 0.0000
2023-02-13 2022-12-31 13F MAMMOTH ENERGY SVCS COM 56155L108 6,226 0 0.00 54 152.38 0.0000
2022-11-10 2022-09-30 13F MAMMOTH ENERGY SVCS COM 56155L108 6,226 0 0.00 21 50.00 0.0000
2022-08-12 2022-06-30 13F MAMMOTH ENERGY SVCS COM 56155L108 6,226 0 0.00 14 7.69 0.0000
2022-05-13 2022-03-31 13F MAMMOTH ENERGY SVCS COM 56155L108 6,226 6,226 13 0.0000
2022-02-14 2021-09-30 13F/A-1 MAMMOTH ENERGY SVCS COM 56155L108 0 -1 -100.00 0 0.0000
2021-11-15 2021-09-30 13F MAMMOTH ENERGY SVCS COM 56155L108 0 -1 0 0.0000
2021-08-13 2021-06-30 13F MAMMOTH ENERGY SVCS COM 56155L108 1 1 0 0.0000
2020-02-07 2019-12-31 13F MAMMOTH ENERGY SVCS COM 56155L108 0 -370 -100.00 0 -100.00
2019-11-13 2019-09-30 13F MAMMOTH ENERGY SVCS COM 56155L108 370 231 166.19 1 0.00 0.0000
2019-08-13 2019-06-30 13F MAMMOTH ENERGY SVCS COM 56155L108 139 139 1 0.0000
2019-05-13 2019-03-31 13F MAMMOTH ENERGY SVCS COM 56155L108 0 -1 -100.00 0 0.0000
2019-02-13 2018-12-31 13F MAMMOTH ENERGY SVCS COM 56155L108 1 0 0.00 0 0.0000
2018-11-09 2018-09-30 13F MAMMOTH ENERGY SVCS COM 56155L108 1 1 0 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.