Mammoth Energy Services Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGS:TUSK Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Role	Shares	Max Price
28 May 26	BuyUS$17,850	Arthur Amron	Individual		5,500	US$3.25
11 Dec 25	BuyUS$18,900	Arthur Amron	Individual		10,000	US$1.89

Insider Trading Volume

Insider Buying: TUSK insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of TUSK?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	966,401	2.01%
Hedge Funds	4,575,000	9.5%
General Public	11,985,078	24.9%
Institutions	30,644,168	63.6%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 72.15% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
45.8%	Wexford Capital LP	22,068,212	US$72.6m	-0.13%	8.07%
9.5%	Adage Capital Management, L.P.	4,575,000	US$15.1m	0%	0.02%
3.02%	BlackRock, Inc.	1,454,839	US$4.8m	-1.24%	no data
1.7%	Vanguard Capital Management, LLC	819,120	US$2.7m	0%	no data
1.42%	Dimensional Fund Advisors LP	686,199	US$2.3m	-1.93%	no data
1.27%	Geode Capital Management, LLC	610,926	US$2.0m	4.3%	no data
1.25%	Peapod Lane Capital LLC	599,805	US$2.0m	0%	1.43%
1.19%	Bridgeway Capital Management, LLC	573,626	US$1.9m	-8.8%	0.02%
0.88%	State Street Global Advisors, Inc.	421,922	US$1.4m	3.29%	no data
0.87%	Mark Layton	418,985	US$1.4m	0%	no data
0.69%	Citadel Advisors LLC	331,367	US$1.1m	50.6%	no data
0.5%	James Palm	240,144	US$790.1k	13.1%	no data
0.48%	Renaissance Technologies LLC	231,972	US$763.2k	24.7%	no data
0.42%	Acadian Asset Management LLC	204,105	US$671.5k	91%	no data
0.39%	Northern Trust Global Investments	187,128	US$615.7k	11.5%	no data
0.35%	Vanguard Fiduciary Trust Company	170,131	US$559.7k	-0.14%	no data
0.34%	Los Angeles Capital Management LLC	163,259	US$537.1k	1,130%	no data
0.32%	Boston Partners Global Investors, Inc.	154,388	US$507.9k	0%	no data
0.29%	Vanguard Portfolio Management, LLC	140,145	US$461.1k	0%	no data
0.28%	BNY Asset Management	132,539	US$436.0k	-0.1%	no data
0.26%	Corey Booker	125,488	US$412.9k	28.5%	no data
0.24%	Goldman Sachs Asset Management, L.P.	113,483	US$373.4k	0%	no data
0.23%	Eaton Vance Management	111,335	US$366.3k	36%	no data
0.23%	Centiva Capital, LP	111,108	US$365.5k	169%	0.02%
0.23%	The Goldman Sachs Group, Inc.	110,006	US$361.9k	22.3%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/06/14 04:32
End of Day Share Price	2026/06/12 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Mammoth Energy Services, Inc. is covered by 11 analysts. 0 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
J. David Anderson	Barclays
Luke Lemoine	Capital One Securities, Inc.
Ignacio Bernaldez	D. Boral Capital LLC.