Security key
56155L108
MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK)
CUSIP: 56155L108
Q4 2019 13F Holders as of 31 Dec 2019
- Security type / class
- Equity / Common Stock, $0.01 par value
- Total 13F shares
- 32,417,235
- Total 13F value
- $71,315,662
- Share change
- -2,445,976
- SEC-reported price per share
- $2.20
- Number of holders
- 69
- Value change
- -$5,948,187
- Number of buys
- 28
- Number of sells
- 57
- Shares outstanding
- 48,179,010
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2019
Institutions
69
Top holders
10
TUSK full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
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
30 Sep 2019
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%
Russell Investments Group, Ltd.
4.5%
HOTCHKIS & WILEY CAPITAL MANAGEME...
1.9%
BlackRock Finance, Inc.
1.8%
DIMENSIONAL FUND ADVISORS LP
1.7%
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%
|
$54,542,000
21,992,677 shares
|
— | 30 Sep 2019 |
| Russell Investments Group, Ltd. |
13F
Company
|
4.5%
|
$5,359,000
2,160,958 shares
|
— | 30 Sep 2019 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC |
13F
Company
|
1.9%
|
$2,271,000
915,560 shares
|
— | 30 Sep 2019 |
| BlackRock Finance, Inc. |
13F
Company
|
1.8%
|
$2,207,000
890,079 shares
|
— | 30 Sep 2019 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
1.7%
|
$2,069,000
834,133 shares
|
— | 30 Sep 2019 |
| MORGAN STANLEY |
13F
Company
|
1.7%
|
$2,004,000
808,206 shares
|
— | 30 Sep 2019 |
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 Q4 2019
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
69
Shares
32,417,235
Rows available
69
| 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 Q4 2019 vs Q3 2019 Across Filers
Q3 2019 holders
86
Q4 2019 holders
69
Holder diff
-17
| Investor | Q3 2019 Shares | Q4 2019 Shares | Share Diff | Share Chg % | Q3 2019 value | Q4 2019 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend