W. Gary Willingham

Insider Trading: Sales

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
NBL	$37.50	24,646	$924,225.00	169,994	2018-07-10	Filing
NBL	$40.00	15,958	$638,320.00	106,939	2016-12-01	Filing
NBL	$75.00	14,432	$1,082,400.00	62,485	2014-06-11	Filing