Security key
56155L108
MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK)
CUSIP: 56155L108
Q1 2021 13F Holders as of 31 Mar 2021
- Security type / class
- Equity / Common Stock, $0.01 par value
- Total 13F shares
- 28,821,230
- Total 13F value
- $186,224,971
- Share change
- +5,330
- SEC-reported price per share
- $5.32
- Number of holders
- 51
- Value change
- +$33,094,718
- Number of buys
- 29
- Number of sells
- 15
- Shares outstanding
- 48,179,010
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2021
Institutions
51
Top holders
10
TUSK full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2021
Previous quarter: Q4 2020
MAMMOTH ENERGY SERVICES, INC. SEC filings
MAMMOTH ENERGY SERVICES, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 56155L108
Recent filing periods:
Ownership snapshot
Top reported holders 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. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
WEXFORD CAPITAL LP
Disclosed value leader
WEXFORD CAPITAL LP
Comparable rows
15/15
Latest evidence
31 Dec 2020
13F
Lead comparable stake: 46%
Showing 1-6 of 15 holder rows.
Quick read
WEXFORD CAPITAL LP leads the comparable SEC ownership view at 46%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens WEXFORD CAPITAL LP's linked filing trail.
Comparable ownership
Top 5
WEXFORD CAPITAL LP
46%
VALUEWORKS LLC
7%
VANGUARD GROUP INC
1.1%
BRIDGEWAY CAPITAL MANAGEMENT, LLC
0.98%
BlackRock Finance, Inc.
0.64%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| WEXFORD CAPITAL LP |
13F
Company
|
46%
|
$98,195,000
22,066,259 shares
|
— | 31 Dec 2020 |
| VALUEWORKS LLC |
13F
Company
|
7%
|
$14,987,000
3,367,799 shares
|
— | 31 Dec 2020 |
| VANGUARD GROUP INC |
13F
Company
|
1.1%
|
$2,267,000
509,567 shares
|
— | 31 Dec 2020 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
Company
|
0.98%
|
$2,098,000
471,500 shares
|
— | 31 Dec 2020 |
| BlackRock Finance, Inc. |
13F
Company
|
0.64%
|
$1,374,000
308,698 shares
|
— | 31 Dec 2020 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
0.59%
|
$1,273,000
286,268 shares
|
— | 31 Dec 2020 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
51
Shares
28,821,230
Rows available
51
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2021 vs Q4 2020 Across Filers
Q4 2020 holders
44
Q1 2021 holders
51
Holder diff
7
| Investor | Q4 2020 Shares | Q1 2021 Shares | Share Diff | Share Chg % | Q4 2020 value | Q1 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend