Mammoth Energy Services, Inc. (TUSK) Insider Trading

Over the last 3 months, TUSK insiders made 4 open-market buys and 0 sales, a net purchase of $32K (SEC Form 4). Over the last 6 months, 50 institutions increased and 48 reduced their position (13F).

Insider Activity

Sentiment
100/100
Buys (3m)
4
Sells (3m)
0
Net (3m)
$32.5K
Insiders buying
Insider trades by month Buys Sells
Nov
Dec
May
Dec
May
Jun
Context3-month price +42.9%Institutions mixed (13F)
DateInsiderTypeSharesPrice
Jun 15, 2026Amron Arthur HdirectorBuy2,500$3.22
Jun 15, 2026Amron Arthur HdirectorBuy2,000$3.28
May 28, 2026Amron Arthur HdirectorBuy2,500$3.24
May 28, 2026Amron Arthur HdirectorBuy3,000$3.25
Dec 15, 2025Amron Arthur HdirectorBuy10,000$1.89
May 27, 2025SMITH ARTHUR LdirectorSell20,000$2.51
May 21, 2025SMITH ARTHUR LdirectorSell15,000$2.49
May 21, 2025SMITH ARTHUR LdirectorSell50,000$2.51
Dec 16, 2024Amron Arthur HdirectorBuy1,000$2.97
Nov 26, 2024Booker Corey J.directorSell15,000$3.47
Nov 26, 2024Booker Corey J.directorSell10,000$3.43
Nov 22, 2024Booker Corey J.directorSell5,000$3.21
Nov 22, 2024Booker Corey J.directorSell6,709$3.25
Nov 15, 2024Booker Corey J.directorSell3,607$3.50
Nov 15, 2024Booker Corey J.directorSell7,100$3.68
Nov 12, 2024Booker Corey J.directorSell24$3.76
Nov 12, 2024Booker Corey J.directorSell3,494$3.61
Nov 12, 2024Booker Corey J.directorSell165$3.90
Jun 14, 2024Amron Arthur HdirectorGrant27,856
Jun 14, 2024Palm James DdirectorGrant27,856
Jun 14, 2024SMITH ARTHUR LdirectorGrant27,856
Jun 14, 2024Jacobi Paul M.directorGrant27,856
Jun 14, 2024Booker Corey J.directorGrant27,856
May 30, 2024Amron Arthur HdirectorBuy3,000$3.65
May 30, 2024Amron Arthur HdirectorBuy2,000$3.57
Mar 14, 2024Amron Arthur HdirectorBuy3,000$3.72
Dec 19, 2023Straehla Artydirector, officer: Chief Executive OfficerSell40,000$4.35
Dec 19, 2023Straehla Artydirector, officer: Chief Executive OfficerSell30,000$4.38
Dec 15, 2023Straehla Artydirector, officer: Chief Executive OfficerSell55,000$4.44
Dec 15, 2023Straehla Artydirector, officer: Chief Executive OfficerSell25,000$4.39

Source: TUSK SEC Form 4 filings, latest Jun 15, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their TUSK positions over the last 6 months (SEC Form 13F).

Increased
50
New positions
37
Reduced
48
Sold out
27
Largest moves
InstitutionActionSharesFiled
WEXFORD CAPITAL LPUnchanged22.1MFeb 13, 2026
WEXFORD CAPITAL LPReduced22.1MMay 15, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Unchanged4.6MFeb 17, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Unchanged4.6MMay 15, 2026
BLACKROCK, INC.Increased1.5MFeb 12, 2026
BLACKROCK, INC.Reduced1.5MMay 13, 2026
VANGUARD GROUP INCIncreased1.0MJan 29, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position819KMay 15, 2026
DIMENSIONAL FUND ADVISORS LPReduced700KFeb 12, 2026
DIMENSIONAL FUND ADVISORS LPReduced686KMay 7, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased611KMay 15, 2026
PEAPOD LANE CAPITAL LLCNew Position600KMay 4, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased586KFeb 9, 2026
EMPOWERED FUNDS, LLCIncreased483KJun 16, 2026
STATE STREET CORPIncreased422KMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.