LIVE FROM THE DATABASETRANSACTIONS 362,430COMPANIES 5,763LATEST TRADE Oct 16UPDATED Oct 17, 12:31 AM
TUSKCIK 0001679268

MAMMOTH ENERGY SERVICES, INC.

15 transactions by 6 insiders, from December 11, 2025 to September 16, 2026.

Transactions
156 insiders
Bought · P
$10.5Mopen market
Sold · S
Nonenobody sold on the open market
Net
+$10.5Mnet buying

Officers and directors

People inside the company. What they do with their own shares is the reason this data exists.

InsiderTradesPlannedBoughtSold
Arthur H. AmronDir7—$51K—
WEXFORD CAPITAL LPChief3—$10.5M—
Mark Lawrence PlaumannDir1—$15K—
Phillip LancasterDir1———
Paul M. JacobiChief1———

Large holders and funds

Holders above 10%, often funds. They file the same form, but they trade for portfolio reasons, not because of what they know.

InsiderTradesPlannedBoughtSold
Charles E. Davidson10%2———

All transactions

15 in total, newest filings first.

InsiderDateCodeSharesPriceValue
Mark Lawrence PlaumannDirSep 16P5,000$3.00$15K
Phillip LancasterDirJun 26J68,152$0.00—
Paul M. JacobiChiefJun 17J3,211$0.00—
WEXFORD CAPITAL LPChiefJOINTJun 17P4,019,574$2.60$10.5M
WEXFORD CAPITAL LPChiefJOINTJun 17J6,354,667$0.00—
WEXFORD CAPITAL LPChiefJOINTJun 17J1,072,896$0.00—
Charles E. Davidson10%JOINTJun 17J4,066,610$0.00—
Charles E. Davidson10%JOINTJun 17J2,403,831$0.00—
Arthur H. AmronDirJOINTJun 17J10,329$0.00—
Arthur H. AmronDirJOINTJun 17J19,121$0.00—
Arthur H. AmronDirJun 12P2,000$3.28$7K
Arthur H. AmronDirJun 11P2,500$3.22$8K
Arthur H. AmronDirMay 28P3,000$3.25$10K
Arthur H. AmronDirMay 26P2,500$3.24$8K
Arthur H. AmronDirDec 11P10,000$1.89$19K