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CIK 0001679268 · Accelerated filer<br>Smaller reporting company

MAMMOTH ENERGY SERVICES, INC.

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Ticker
TUSK
Exchange
Nasdaq
Industry
Oil & Gas Field Services, NEC
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
320498321
Phone
405-608-6007
Business address
14201 CALIBER DRIVE, SUITE 300, OKLAHOMA CITY, OK, 73134
Open-market buys, last 90 days
$15,000
in 1 filing
Open-market sales, last 90 days
$0
in 0 filings

Net +$15,000. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Plaumann Mark Lawrence +$15K Director 1 filing
Date Insider Transaction Shares Price Value Owned after
2017-06-08 MEH SUB LLC Director Grant or award +4,565,416 25,009,319
2017-02-28 Straehla Arty Chief Executive Officer Purchase +460 $21.76 $10K 460
2017-02-21 Layton Mark E. CFO and Secretary Grant or award +40,000 58,000
2016-11-07 Ross Matthew Director Grant or award +6,667 6,667
2016-10-19 McCarthy Marc T Director Grant or award +6,667 6,667
2016-10-19 Mammoth Energy Holdings LLC Director Sale −171,797 $14.06 $2.4M 20,445,923
2016-10-19 Gaydosik Aaron Director Grant or award +6,667 6,667
2016-10-19 GULFPORT ENERGY CORP Director Sale −76,250 $14.06 $1.1M 9,080,417
2016-10-19 Layton Mark E. CFO and Secretary Purchase +3,000 $15.00 $45K 3,000
2016-10-19 Layton Mark E. CFO and Secretary Grant or award +15,000 18,000
2016-10-19 SMITH ARTHUR L Director Grant or award +6,667 6,667
2016-10-19 Straehla Arty Chief Executive Officer Purchase +666 $15.00 $10K 666
2016-10-19 Straehla Arty Chief Executive Officer Purchase +666 $15.00 $10K 1,332
2016-10-19 Straehla Arty Chief Executive Officer Grant or award +250,000 251,332
2016-10-19 Weiss Andre Director Grant or award +6,667 6,667
2016-01-09 Heerwagen Paul K IV Director Grant or award +4,444 4,444

Page 7 of 7 · 136 trades