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TUSK

MAMMOTH ENERGY SERVICES, INC.

NASDAQ · Industrials · Conglomerates · US

$3.18
−1.24%
Ask drillr
1
Insider buys (3m)
0
Insider sells (3m)
$15.0K
Net value (3m)
+8.4%
Price return (3m)
Form 4 filings
DateInsiderActivitySharesPrice
Sep 17, 2026Plaumann Mark Lawrence · directorPurchase5,000$3.00
Jun 22, 2026WEXFORD CAPITAL LP · director, 10 percent owner, officer: Chief Business OfficerPurchase4,019,574$2.60
Jun 15, 2026Amron Arthur H · directorPurchase2,500$3.22
Jun 15, 2026Amron Arthur H · directorPurchase2,000$3.28
May 28, 2026Amron Arthur H · directorPurchase2,500$3.24
May 28, 2026Amron Arthur H · directorPurchase3,000$3.25
Dec 15, 2025Amron Arthur H · directorPurchase10,000$1.89
May 27, 2025SMITH ARTHUR L · directorSale20,000$2.51
May 21, 2025SMITH ARTHUR L · directorSale50,000$2.51
May 21, 2025SMITH ARTHUR L · directorSale15,000$2.49
Dec 16, 2024Amron Arthur H · directorPurchase1,000$2.97
Nov 26, 2024Booker Corey J. · directorSale15,000$3.47
Nov 26, 2024Booker Corey J. · directorSale10,000$3.43
Nov 22, 2024Booker Corey J. · directorSale6,709$3.25
Nov 22, 2024Booker Corey J. · directorSale5,000$3.21
Nov 15, 2024Booker Corey J. · directorSale3,607$3.50
Nov 15, 2024Booker Corey J. · directorSale7,100$3.68
Nov 12, 2024Booker Corey J. · directorSale165$3.90
Nov 12, 2024Booker Corey J. · directorSale3,494$3.61
Nov 12, 2024Booker Corey J. · directorSale24$3.76
Jun 14, 2024Booker Corey J. · directorA-Award27,856$0.00
Jun 14, 2024Amron Arthur H · directorA-Award27,856$0.00
Jun 14, 2024Palm James D · directorA-Award27,856$0.00
Jun 14, 2024SMITH ARTHUR L · directorA-Award27,856$0.00
Jun 14, 2024Jacobi Paul M. · directorA-Award27,856$0.00
May 30, 2024Amron Arthur H · directorPurchase2,000$3.57
May 30, 2024Amron Arthur H · directorPurchase3,000$3.65
Mar 14, 2024Amron Arthur H · directorPurchase3,000$3.72
Dec 19, 2023Straehla Arty · director, officer: Chief Executive OfficerSale30,000$4.38
Dec 19, 2023Straehla Arty · director, officer: Chief Executive OfficerSale40,000$4.35
Institutional positioning

13F filings over the trailing two quarters

New 60Increased 57Reduced 47Sold out 23
FilerActionSharesFiled
WEXFORD CAPITAL LPReduced22,068,212May 15, 2026
WEXFORD CAPITAL LPReduced12,071,823Aug 14, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Unchanged4,575,000Aug 14, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Unchanged4,575,000May 15, 2026
BLACKROCK, INC.Reduced1,454,839May 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCIncreased1,059,603Aug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position819,120May 15, 2026
Peapod Lane Capital LLCIncreased807,804Jul 27, 2026
DIMENSIONAL FUND ADVISORS LPIncreased691,667Aug 11, 2026
DIMENSIONAL FUND ADVISORS LPReduced686,199May 7, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased610,926May 15, 2026
PEAPOD LANE CAPITAL LLCNew Position599,805May 4, 2026
CITADEL ADVISORS LLCIncreased593,263Sep 2, 2026
JANE STREET GROUP, LLCIncreased506,662Aug 14, 2026
STATE STREET CORPIncreased421,922May 15, 2026

Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Sep 17, 2026