A. Gregory Lang

Insider Trading: Sales

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
NG	$5.75	42,641	$245,185.75	139,059	2019-07-02	Filing
NG	$4.36	66,793	$291,217.48	120,480	2019-06-13	Filing
NG	$3.84	65,039	$249,749.76	1,654,015	2018-12-17	Filing
NG	$3.79	42,117	$159,623.43	1,631,026	2018-12-14	Filing
NG	$3.94	44,099	$173,750.06	1,608,327	2018-12-13	Filing
NG	$3.93	43,768	$172,008.24	1,584,554	2018-12-12	Filing
NG	$3.93	87,822	$345,140.46	1,560,919	2018-12-10	Filing
NG	$3.80	41,568	$157,958.40	1,604,327	2018-12-07	Filing
NG	$3.78	47,636	$180,064.08	1,581,865	2018-12-04	Filing
NG	$3.73	61,087	$227,854.51	1,559,643	2018-12-03	Filing
NG	$3.86	20,444	$78,913.84	1,360,784	2018-11-19	Filing
NG	$3.97	33,283	$132,133.51	1,338,203	2018-11-09	Filing
NG	$4.15	34,254	$142,154.10	1,326,518	2018-11-05	Filing
NG	$4.07	10,901	$44,367.07	1,314,279	2018-10-31	Filing
NG	$4.18	11,836	$49,474.48	1,302,233	2018-10-30	Filing
NG	$3.84	5,778	$22,187.52	1,326,821	2017-12-04	Filing
NG	$3.85	5,528	$21,282.80	1,321,127	2017-11-21	Filing
NG	$3.83	1,000	$3,830.00	1,315,680	2017-11-17	Filing
NG	$3.83	4,346	$16,645.18	1,316,680	2017-11-17	Filing
NG	$4.09	7,300	$29,857.00	1,310,414	2017-11-09	Filing