David L Bradshaw

Insider

First SEC filing: Dec. 20, 2011 · Latest: Dec. 20, 2011

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

NGS selling June 4, 2019

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 21 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

21 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 13, 2024	NGS	A	5,620	—	—	5,620 Direct	—	Acquired	(price as of 2026-08-20)
May 13, 2024	NGS	A	9,470	—	—	45,726 Direct	+26.12%	Acquired	(price as of 2026-08-20)
May 9, 2024	NGS	M	9,470	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 9, 2024	NGS	A	4,735	—	—	40,991 Direct	+13.06%	Acquired	(price as of 2026-08-20)
May 9, 2023	NGS	A	9,470	—	—	9,470 Direct	—	Acquired	(price as of 2026-08-20)
April 26, 2022	NGS	A	4,212	$11.87	$49,996	36,256 Direct	+13.14%	Acquired	199.0% (price as of 2026-08-20)
March 18, 2021	NGS	A	5,612	$8.91	$50,003	32,044 Direct	+21.23%	Acquired	298.3% (price as of 2026-08-20)
April 28, 2020	NGS	A	4,432	$5.64	$24,996	26,432 Direct	+20.15%	Acquired	529.3% (price as of 2026-08-20)
June 4, 2019	NGS	S	1,600	$14.98	$23,968	22,000 Direct	-6.78%	Disposed	136.9% (price as of 2026-08-20)
June 4, 2019	NGS	S	1,756	$15.20	$26,691	23,600 Direct	-6.93%	Disposed	133.5% (price as of 2026-08-20)
March 29, 2019	NGS	A	5,784	$17.29	$100,005	25,356 Direct	+29.55%	Acquired	105.3% (price as of 2026-08-20)
March 15, 2018	NGS	A	4,072	$24.55	$99,968	19,572 Direct	+26.27%	Acquired	44.6% (price as of 2026-08-20)
March 13, 2018	NGS	S	1,853	$27.35	$50,680	15,500 Direct	-10.68%	Disposed	29.8% (price as of 2026-08-20)
March 13, 2018	NGS	S	647	$27.11	$17,540	17,353 Direct	-3.59%	Disposed	30.9% (price as of 2026-08-20)
June 20, 2017	NGS	S	2,540	$23.60	$59,944	18,000 Direct	-12.37%	Disposed	50.4% (price as of 2026-08-20)
March 23, 2017	NGS	A	3,992	$25.05	$100,000	20,540 Direct	+24.12%	Acquired	41.7% (price as of 2026-08-20)
June 23, 2016	NGS	S	2,500	$24.35	$60,875	16,548 Direct	-13.12%	Disposed	45.7% (price as of 2026-08-20)
April 6, 2016	NGS	A	5,884	$20.39	$119,975	19,666 Direct	-23.03%	Disposed	74.1% (price as of 2026-08-20)
Dec. 31, 2015	NGS	F	206	$22.30	$4,594	19,048 Direct	-1.07%	Disposed	59.1% (price as of 2026-08-20)
Sept. 30, 2015	NGS	F	206	$19.30	$3,976	19,254 Direct	-1.06%	Disposed	83.9% (price as of 2026-08-20)
June 30, 2015	NGS	F	206	$22.82	$4,701	19,460 Direct	-1.05%	Disposed	55.5% (price as of 2026-08-20)
March 31, 2015	NGS	F	206	$19.22	$3,959	13,782 Direct	-1.47%	Disposed	84.7% (price as of 2026-08-20)
March 19, 2015	NGS	A	5,492	$18.75	$102,975	13,988 Direct	+64.64%	Acquired	89.3% (price as of 2026-08-20)
March 20, 2014	NGS	A	3,288	$30.41	$99,988	8,496 Direct	+63.13%	Acquired	16.7% (price as of 2026-08-20)
March 21, 2013	NGS	A	2,500	$18.75	$46,875	5,208 Direct	+92.32%	Acquired	89.3% (price as of 2026-08-20)
Dec. 12, 2012	NGS	A	208	$16.48	$3,428	2,708 Direct	+8.32%	Acquired	115.4% (price as of 2026-08-20)
March 28, 2012	NGS	A	2,500	$13.43	$33,575	2,500 Direct	—	Acquired	164.3% (price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
June 13, 2024	NGS	Restricted Stock Units	Common Stock (5,620)	—	—	5,620	Acquired
May 9, 2024	NGS	Restricted Stock Units	Common Stock (9,470)	—	—	9,470	Disposed
May 9, 2023	NGS	Restricted Stock Unit	Common Stock (9,470)	—	—	9,470	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Dec. 20, 2011	NGS	Common Stock	0	Direct