Insider · CIK 0001290795

Mark Lawrence Plaumann

Files at: TUSK, FANG, RJETQ, RHNO. On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $15k · 1sales $811k · 5net −$796k

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 16, 2026 PForm 4 →	Sep 17, 4:50 pm EDT	MAMMOTH ENERGY SERVICES, INC.TUSK	5,000	$3.00	$15,000	5,000	—
Aug 21, 2026 SForm 4 →	Aug 24, 4:01 pm EDT	Diamondback Energy, Inc.FANG	1,000	$210.58	$210,577	12,437	−7.44%
Jun 9, 2026 SForm 4 →	Jun 10, 4:08 pm EDT	Diamondback Energy, Inc.FANG	500	$196.50	$98,250	13,437	−3.59%
Jun 7, 2018 AForm 4 →	Jun 11, 4:57 pm EDT	Diamondback Energy, Inc.FANG	1,574	—	—	10,134	—	plan?
Jul 12, 2017 AForm 4 →	Jul 14, 1:43 pm EDT	Diamondback Energy, Inc.FANG	2,055	—	—	8,560	—	plan?
May 23, 2017 SForm 4 →	May 25, 12:26 pm EDT	Diamondback Energy, Inc.FANG	1,000	$101.52	$101,524	6,505	−13.3%	plan?
Feb 17, 2017 SForm 4 →	Feb 21, 8:10 pm EST	Diamondback Energy, Inc.FANG	1,900	$107.35	$203,967	7,505	−20.2%	plan?
Aug 28, 2016 AForm 4 →	Aug 31, 5:45 pm EDT	Diamondback Energy, Inc.FANG	1,359	—	—	9,405	—	plan? late
Nov 13, 2015 AForm 4 →	Nov 17, 4:11 pm EST	REPUBLIC AIRWAYS HOLDINGS INCRJET	11,728	—	—	21,960	—	plan?
Oct 5, 2015 AForm 4 →	Oct 7, 4:35 pm EDT	Rhino Resource Partners LPRNO	30,488	—	—	38,563	—	plan?
Sep 14, 2015 SForm 4 →	Sep 16, 4:30 pm EDT	Diamondback Energy, Inc.FANG	3,000	$65.66	$196,973	8,046	−27.2%	plan?
Aug 25, 2015 AForm 4 →	Aug 31, 6:47 pm EDT	Diamondback Energy, Inc.FANG	1,578	—	—	11,046	—	plan? late

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.