Mammoth Energy Services (TUSK)
Rents oilfield equipment and supplies sand proppant, contract drilling, and workforce housing to US producers.
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Rents oilfield equipment and supplies sand proppant, contract drilling, and workforce housing to independent oil and gas producers across US shale basins. Assembled through acquisition by Wexford Capital ahead of a 2016 Nasdaq listing, the business later restored Puerto Rico's power grid after a hurricane before divesting most of its utility-infrastructure operations in 2025.
Rents oilfield equipment and supplies sand proppant, contract drilling, and workforce accommodations to independent oil and gas producers, concentrated across US shale basins including the Utica, Marcellus, and Permian. A small utility-infrastructure segment remains after a larger divestiture.
The business was assembled through acquisition by Wexford Capital, which retains roughly half the outstanding shares, ahead of a 2016 Nasdaq listing. Its Cobra Acquisitions subsidiary later became known for restoring Puerto Rico's electric grid after Hurricane Maria, work that also drew a federal bribery investigation and related shareholder litigation.
A 2024 settlement over the outstanding Puerto Rico receivable was followed in 2025 by the sale of most infrastructure subsidiaries, leaving a smaller, cash-rich company centered on its original oilfield service lines. Leadership passed from a long-serving chief executive to a chief operating officer holding principal-executive authority, with no successor CEO named.
Company facts
Target rangeAs of Sep 2, 2026
Latest analyst notes
No analyst notes in the last 24 months.
EPSReportedEstimate
RevenueReportedEstimate
Balance sheet, Jun 30, 2026Cash & short-term investments $77.0M · Total debt $4.4M · Total assets $346.0M · Shareholders' equity $262.4M
- Revenue
- $26.1M
- Operating income
- −$2.0M
- Net income
- −$733.0K
No dividends on record.
| Institutions91 holders · as of Mar 31, 2026 | 72.86% | 35.06M shares | |
| Insiders6 holders · as of Jul 1, 2026 | 14.57% | 7.01M shares | |
| Strategic holders2 holders · as of Jul 12, 2021 | 25.68% | 12.36M shares | |
| Adds to | 113.11% |
48.13M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing
These groups come from separate filings that can overlap, so they add to 113.11%; nothing is left for Other.
Top shareholders13F · 13D/G · Form 4
| Holder | Stake | Shares | Evidence |
|---|---|---|---|
Wexford Capital LPInstitution | 45.85% | 22.07M | 13Fas of Mar 31, 2026 |
GPOR Distribution TrustStrategic10 percent owner | 20.42% | 9.83M | 13Dfiled Jul 12, 2021 ↗ |
Charles E. DavidsonInsider10 percent owner | 13.44% | 6.47M | 13Gfiled Jun 22, 2026 ↗ |
Adage Capital Partners GP, L.L.C.Institution | 9.51% | 4.58M | 13Fas of Mar 31, 2026 |
Janus Henderson Group plcStrategic | 5.25% | 2.53M | 13D/Gfiled Feb 13, 2018 ↗ |
| See all 25 → | |||
13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more
Insider tradesForm 4
| Date | Insider | Role | Shares | Avg price |
|---|---|---|---|---|
| Jun 17, 2026 | Wexford Capital LP | director, 10 percent owner, officer: Chief Business Officer | +4,019,574 | $2.60 |
| Jun 11, 2026 | Arthur H. Amron | director | +2,500 | $3.22 |
| Jun 12, 2026 | Arthur H. Amron | director | +2,000 | $3.28 |
| May 26, 2026 | Arthur H. Amron | director | +2,500 | $3.24 |
| May 28, 2026 | Arthur H. Amron | director | +3,000 | $3.25 |
- Atlas Energy Solutions
Large-scale Permian in-basin proppant producer dwarfing Sand segment output
- Target Hospitality
Largest US workforce housing operator, direct rival in remote lodging
- MasTec
Major utility-infrastructure contractor; sued Cobra over PREPA work
- Drilling Tools International
Global directional-drilling tool rental specialist, direct segment overlap
- RPC
Diversified oilfield services firm; rental-tools line overlaps directly
- Smart Sand
Small-cap Northern White sand producer, closest-scale sand peer
- Quanta Services
Largest US electric-infrastructure contractor by scale
Compare
| Company | Price | Change | |||||
|---|---|---|---|---|---|---|---|
| Mammoth Energy Services | $3.24 | +4.52% | $155.1M | 217.6 | — | 2.6 | +58.8% |
| Atlas Energy Solutions | $13.03 | −0.08% | $1.63B | — | — | 1.5 | +1.6% |
| Target Hospitality | $18.50 | +0.60% | $1.83B | — | 45.0 | 5.3 | +38.7% |
| MasTec | $235.40 | +0.08% | $18.90B | 37.5 | 21.3 | 1.2 | +23.4% |
| Drilling Tools International | $2.66 | +1.14% | $91.7M | — | 9.0 | 0.6 | −3.4% |
| RPC | $6.65 | +1.06% | $1.46B | 66.0 | 25.2 | 0.8 | +9.5% |
| Smart Sand | $5.20 | −0.19% | $223.5M | 20.0 | — | 0.6 | +34.1% |
| Quanta Services | $611.00 | +0.05% | $91.83B | 70.0 | 34.0 | 2.8 | +41.1% |
| Median | 51.8 | 25.2 | 1.2 | +23.4% |