Wexford Spectrum Trading LTD

10% owner at NORD RESOURCES CORP · on record since Oct 15, 2007
10% owner at AVIATION UPGRADE TECHNOLOGIES INC · on record since Nov 15, 2007
10% owner prior to this filing at NORD RESOURCES CORP · on record since Jan 31, 2008
10% owner at Bronco Drilling Company, Inc. · on record since Jul 25, 2008
10% owner at Diamondback Energy, Inc. · on record since Nov 15, 2013
Director at MAMMOTH ENERGY SERVICES, INC. · on record since Nov 22, 2019
10% owner at MAMMOTH ENERGY SERVICES, INC. · on record since Nov 22, 2019

Insider trading activity of Wexford Spectrum Trading LTD

Figures computed from official regulatory filings — methodology.

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Company	Filed	Type	Qty	Price	Value · USD	Src
MAMMOTH ENERGY SERVICES, INC.	Nov 22, 2019	Buy	16,692	1.33 USD	$22.2K	SEC
NORD RESOURCES CORP	Jan 31, 2008	OtherD	1,149,750	—	—	SEC
NORD RESOURCES CORP	Jan 31, 2008	OtherD	-2,299,500	—	—	SEC
NORD RESOURCES CORP	Jan 31, 2008	Other	2,299,500	—	—	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
MAMMOTH ENERGY SERVICES, INC.	Nov 22, 2019	Buy	16,692	1.33 USD	$22.2K	SEC
NORD RESOURCES CORP	Jan 31, 2008	OtherD	1,149,750	—	—	SEC
NORD RESOURCES CORP	Jan 31, 2008	OtherD	-2,299,500	—	—	SEC
NORD RESOURCES CORP	Jan 31, 2008	Other	2,299,500	—	—	SEC