Mark Lawrence Plaumann

Director, Mammoth Energy Services, Inc.; Director, Diamondback Energy

Bought, 12 months

$0.0M

Sold, 12 months

$0.3M

Companies

Latest trade

Sep 16, 2026

Companies

Mammoth Energy Services, Inc.Director +$0.0M Diamondback EnergyDirector −$0.3M

Trades

TUSK Bought 5,000 shares at $3.00 $0.0M Sep 16

FANG Sold 1,000 shares at $210.58 $0.2M Aug 21

FANG Sold 500 shares at $196.50 $0.1M Jun 9

Open-market trades from SEC Form 4 only: no grants, option exercises or gifts. People are matched by the name on their filings, so two people with the same name share this page. For information only — not investment advice.