How many institutions held TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in Q2 2021?

49 institutional investors reported TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value for Q2 2021. Use the holders table for investor-level position and value details.

MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK)

Q: What does CUSIP 56155L108 represent in this 13F holders report?

CUSIP 56155L108 is the security identifier for TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value used to aggregate holder disclosures.

CUSIP: 56155L108

Q2 2021 13F Holders as of 30 Jun 2021

Type / Class: Equity / Common Stock, $0.01 par value
Shares outstanding: 48,165,948
Total 13F shares: 29,197,357
Share change: +379,999
Total reported value: $134,015,916
Price per share: $4.59
Number of holders: 49
Value change: -$31,266,582
Number of buys: 25
Number of sells: 21

Quarterly Holders Quick Answers

What is CUSIP 56155L108?
CUSIP 56155L108 identifies TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in SEC institutional holdings data.

Need full ownership history?
Open the full security ownership history page.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q3 2021
Previous quarter: Q1 2021

Recent filing periods for CUSIP 56155L108:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
WEXFORD CAPITAL LP	13F	Company	46%	22,066,259	$117,392,000	—	31 Mar 2021	13F
GPOR Distribution Trust	3/4/5	10%+ Owner	— class O/S missing	9,829,548	$42,797,852	—	30 Jun 2021	3/4/5
Dorsey Wright & Associates	13F	Company	0.01%	6,190	$32,931,000	—	31 Mar 2021	13F
VALUEWORKS LLC	13F	Company	6.8%	3,267,736	$17,384,000	—	31 Mar 2021	13F
VANGUARD GROUP INC	13F	Company	1.3%	637,500	$3,391,000	—	31 Mar 2021	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.94%	453,800	$2,414,000	—	31 Mar 2021	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.64%	306,978	$1,633,000	—	31 Mar 2021	13F
BlackRock Finance, Inc.	13F	Company	0.59%	286,177	$1,522,000	—	31 Mar 2021	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.48%	233,119	$1,240,000	—	31 Mar 2021	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.43%	205,786	$1,095,000	—	31 Mar 2021	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.34%	164,500	$875,000	—	31 Mar 2021	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.28%	134,072	$713,000	—	31 Mar 2021	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.23%	109,958	$585,000	—	31 Mar 2021	13F
Bank of New York Mellon Corp	13F	Company	0.21%	103,385	$550,000	—	31 Mar 2021	13F
Squarepoint Ops LLC	13F	Company	0.18%	85,217	$453,000	—	31 Mar 2021	13F
NORTHERN TRUST CORP	13F	Company	0.17%	83,584	$445,000	—	31 Mar 2021	13F
ACADIAN ASSET MANAGEMENT LLC	13F	Company	0.14%	68,846	$366,000	—	31 Mar 2021	13F
WINTON GROUP Ltd	13F	Company	0.13%	62,903	$335,000	—	31 Mar 2021	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.12%	59,178	$315,000	—	31 Mar 2021	13F
STIFEL FINANCIAL CORP	13F	Company	0.12%	55,572	$296,000	—	31 Mar 2021	13F
Cambridge Investment Research Advisors, Inc.	13F	Company	0.11%	55,029	$293,000	—	31 Mar 2021	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.09%	44,270	$236,000	—	31 Mar 2021	13F
CITADEL ADVISORS LLC	13F	Company	0.08%	40,601	$216,000	—	31 Mar 2021	13F
Invesco Ltd.	13F	Company	0.08%	38,018	$202,000	—	31 Mar 2021	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.08%	36,871	$196,000	—	31 Mar 2021	13F
ExodusPoint Capital Management, LP	13F	Company	0.06%	26,542	$141,000	—	31 Mar 2021	13F
NJ State Employees Deferred Compensation Plan	13F	Company	0.05%	24,000	$128,000	—	31 Mar 2021	13F
Sigma Planning Corp	13F	Company	0.04%	21,500	$114,000	—	31 Mar 2021	13F
Brandywine Global Investment Management, LLC	13F	Company	0.04%	18,950	$101,000	—	31 Mar 2021	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.03%	15,843	$85,000	—	31 Mar 2021	13F
OCCUDO QUANTITATIVE STRATEGIES LP	13F	Company	0.03%	13,844	$74,000	—	31 Mar 2021	13F
Schonfeld Strategic Advisors LLC	13F	Company	0.03%	12,755	$68,000	—	31 Mar 2021	13F
HRT FINANCIAL LP	13F	Company	0.02%	11,424	$60,000	—	31 Mar 2021	13F
STATE STREET CORP	13F	Company	0.02%	10,900	$58,000	—	31 Mar 2021	13F
MAD RIVER INVESTORS	13F	Company	0.02%	10,700	$57,000	—	31 Mar 2021	13F
Pinz Capital Management, LP	13F	Company	0.02%	8,028	$43,000	—	31 Mar 2021	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.01%	6,500	$35,000	—	31 Mar 2021	13F
CITIGROUP INC	13F	Company	0.01%	6,197	$33,000	—	31 Mar 2021	13F
SIMPLEX TRADING, LLC	13F	Company	0.01%	5,566	$29,000	—	31 Mar 2021	13F
GROUP ONE TRADING LLC	13F	Company	0.01%	3,900	$21,000	—	31 Mar 2021	13F
ROYAL BANK OF CANADA	13F	Company	0.01%	3,872	$21,000	—	31 Mar 2021	13F
NEXT Financial Group, Inc	13F	Company	0.01%	2,600	$14,000	—	31 Mar 2021	13F
American Portfolios Advisors	13F	Company	0%	2,280	$12,130	—	31 Mar 2021	13F
BARCLAYS PLC	13F	Company	0%	2,326	$12,000	—	31 Mar 2021	13F
OSAIC HOLDINGS, INC.	13F	Company	0%	2,123	$11,000	—	31 Mar 2021	13F
WELLS FARGO & COMPANY/MN	13F	Company	0%	2,007	$10,000	—	31 Mar 2021	13F
JPMORGAN CHASE & CO	13F	Company	0%	1,398	$7,000	—	31 Mar 2021	13F
BANK OF AMERICA CORP /DE/	13F	Company	0%	949	$5,000	—	31 Mar 2021	13F
Tower Research Capital LLC (TRC)	13F	Company	0%	534	$3,000	—	31 Mar 2021	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0%	534	$2,841	—	31 Mar 2021	13F

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q2 2021

As of 30 Jun 2021, MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by 49 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 29,197,357 shares. The largest 10 holders included WEXFORD CAPITAL LP, VALUEWORKS LLC, VANGUARD GROUP INC, BRIDGEWAY CAPITAL MANAGEMENT, LLC, GEODE CAPITAL MANAGEMENT, LLC, RENAISSANCE TECHNOLOGIES LLC, BlackRock Inc., DIMENSIONAL FUND ADVISORS LP, TWO SIGMA ADVISERS, LP, and ACADIAN ASSET MANAGEMENT LLC. This page lists 49 institutional shareholders reporting positions in this security for the Q2 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q2 2021 vs Q1 2021 Across Filers

Q1 2021 holders

Q2 2021 holders

Holder diff

-2

Investor	Q1 2021 Shares	Q2 2021 Shares	Share Diff	Share Chg %	Q1 2021 Value $	Q2 2021 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.