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General | Insiders | Insider Transactions | Monthly Overview | Weekly Overview

Overview of all insider trading transactions in NATURAL GAS SERVICES GROUP INC. Get notifications about new insider transactions in NATURAL GAS SERVICES GROUP INC for free.

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Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.11	200	5,622	312,593	312.8 K to 312.6 K (-0.06 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.10	800	22,480	312,793	313.6 K to 312.8 K (-0.26 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.09	800	22,472	313,593	314.4 K to 313.6 K (-0.25 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.08	1,300	36,504	314,393	315.7 K to 314.4 K (-0.41 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.07	1,700	47,719	315,693	317.4 K to 315.7 K (-0.54 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.06	400	11,224	317,693	318.1 K to 317.7 K (-0.13 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.05	400	11,220	317,793	318.2 K to 317.8 K (-0.13 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.04	1,300	36,452	318,193	319.5 K to 318.2 K (-0.41 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.03	3,600	100,908	319,493	323.1 K to 319.5 K (-1.11 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.02	100	2,802	323,093	323.2 K to 323.1 K (-0.03 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.01	1,836	51,426	323,193	325 K to 323.2 K (-0.56 %)
Jun 09 2008	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	28.00	1,800	50,400	325,029	326.8 K to 325 K (-0.55 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.50	840	23,940	30,000	30.8 K to 30 K (-2.72 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.51	100	2,851	30,840	30.9 K to 30.8 K (-0.32 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.46	100	2,846	30,940	31 K to 30.9 K (-0.32 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.41	100	2,841	31,040	31.1 K to 31 K (-0.32 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.40	397	11,275	31,140	31.5 K to 31.1 K (-1.26 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.36	400	11,344	31,537	31.9 K to 31.5 K (-1.25 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.31	100	2,831	31,937	32 K to 31.9 K (-0.31 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.30	500	14,150	32,037	32.5 K to 32 K (-1.54 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.47	40	1,139	32,537	32.6 K to 32.5 K (-0.12 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.25	1,400	39,550	32,577	34 K to 32.6 K (-4.12 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.60	600	16,560	33,977	34.6 K to 34 K (-1.74 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.59	100	2,759	34,577	34.7 K to 34.6 K (-0.29 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.55	500	13,775	34,677	35.2 K to 34.7 K (-1.42 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.54	200	5,508	35,177	35.4 K to 35.2 K (-0.57 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.52	100	2,752	35,377	35.5 K to 35.4 K (-0.28 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.51	1,000	27,510	35,477	36.5 K to 35.5 K (-2.74 %)
Jun 05 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.50	200	5,500	36,477	36.7 K to 36.5 K (-0.55 %)
Jun 03 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.04	450	12,618	36,677	37.1 K to 36.7 K (-1.21 %)
Jun 03 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	28.01	100	2,801	37,127	37.2 K to 37.1 K (-0.27 %)
Jun 03 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.79	100	2,779	37,227	37.3 K to 37.2 K (-0.27 %)
Jun 03 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	27.75	2,673	74,176	37,327	40 K to 37.3 K (-6.68 %)
May 13 2008	NGS	NATURAL GAS SERVIC ...	HUGHES WILLIAM F JR	Director	Sell	S	26.43	12,000	317,197	160,500	172.5 K to 160.5 K (-6.96 %)
May 13 2008	NGS	NATURAL GAS SERVIC ...	HUGHES WILLIAM F JR	Director	Sell	S	26.34	8,000	210,710	172,500	180.5 K to 172.5 K (-4.43 %)
May 13 2008	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Sell	S	26.54	2,000	53,083	23,000	25 K to 23 K (-8.00 %)
May 13 2008	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Sell	S	26.34	8,000	210,710	25,000	33 K to 25 K (-24.24 %)
May 12 2008	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	26.32	2,500	65,808	20,520	23 K to 20.5 K (-10.86 %)
Mar 17 2008	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Sell	S	21.25	11,976	254,490	40,000	52 K to 40 K (-23.04 %)
Feb 27 2008	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	22.59	2,500	56,463	23,020	25.5 K to 23 K (-9.80 %)
Jan 17 2008	NGS	NATURAL GAS SERVIC ...	Taylor Stephen Charles	President and CEO	Option Exercise	A	20.06	40,000	802,400	40,000
Jan 03 2008	NGS	NATURAL GAS SERVIC ...	HUGHES WILLIAM F JR	Director	Option Exercise	A	19.61	2,500	49,025	2,500
Jan 03 2008	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Option Exercise	A	19.61	2,500	49,025	2,500
Jan 03 2008	NGS	NATURAL GAS SERVIC ...	Baker Alan A	Director	Option Exercise	A	19.61	2,500	49,025	2,500
Jan 03 2008	NGS	NATURAL GAS SERVIC ...	CHISHOLM JOHN	Director	Option Exercise	A	19.61	2,500	49,025	2,500
Jan 03 2008	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Option Exercise	A	19.61	2,500	49,025	2,500
Jan 03 2008	NGS	NATURAL GAS SERVIC ...	STRASHEIM GENE A	Director	Option Exercise	A	19.61	2,500	49,025	2,500
Nov 15 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	18.10	677	12,254	25,520	26.2 K to 25.5 K (-2.58 %)
Nov 15 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	18.06	300	5,418	26,197	26.5 K to 26.2 K (-1.13 %)
Nov 15 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	18.05	100	1,805	26,497	26.6 K to 26.5 K (-0.38 %)
Nov 15 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	18.01	200	3,602	26,597	26.8 K to 26.6 K (-0.75 %)
Nov 15 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	18.00	200	3,600	26,797	27 K to 26.8 K (-0.74 %)
Nov 15 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	17.92	323	5,788	26,997	27.3 K to 27 K (-1.18 %)
Nov 15 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	17.91	700	12,537	27,320	28 K to 27.3 K (-2.50 %)
Sep 17 2007	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting and ...	Sell	S	16.11	2,500	40,264	28,020	30.5 K to 28 K (-8.19 %)
Jun 08 2007	NGS	NATURAL GAS SERVIC ...	Baker Alan A	Director	Option Exercise	M	13.90	2,500	34,750	0
Jun 08 2007	NGS	NATURAL GAS SERVIC ...	Baker Alan A	Director	Buy	M	13.90	2,500	34,750	2,500	0 to 2.5 K
May 18 2007	NGS	NATURAL GAS SERVIC ...	STRASHEIM GENE A	Director	Buy	P	15.14	1,500	22,710	1,500	0 to 1.5 K
Mar 23 2007	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Option Exercise	A	13.90	2,500	34,750	2,500
Jan 05 2007	NGS	NATURAL GAS SERVIC ...	CHISHOLM JOHN	Director	Option Exercise	A	13.90	2,500	34,750	2,500
Jan 05 2007	NGS	NATURAL GAS SERVIC ...	Baker Alan A	Director	Option Exercise	A	13.90	2,500	34,750	2,500
Jan 05 2007	NGS	NATURAL GAS SERVIC ...	STRASHEIM GENE A	Director	Option Exercise	A	13.90	2,500	34,750	2,500
Jan 05 2007	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Option Exercise	A	13.90	2,500	34,750	2,500
Jan 05 2007	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Option Exercise	A	13.90	2,500	34,750	2,500
Jan 05 2007	NGS	NATURAL GAS SERVIC ...	HUGHES WILLIAM F JR	Director	Option Exercise	A	13.90	2,500	34,750	2,500
Dec 04 2006	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Option Exercise	D	3.25	5,318	17,284	0
Dec 04 2006	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Option Exercise	D	2.50	9,365	23,413	0
Dec 04 2006	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Grant	A	3.25	5,318	17,284	5,318	0 to 5.3 K
Dec 04 2006	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Grant	A	2.50	9,365	23,413	9,365	0 to 9.4 K
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	V.P., Accounting an ...	Option Exercise	A	14.22	5,000	71,100	5,000
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	Taylor Stephen Charles	President and CEO	Option Exercise	A	14.22	15,000	213,300	15,000
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Option Exercise	M	3.25	24,000	78,000	0
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Option Exercise	M	3.25	16,000	52,000	0
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Payment of Exercise	F	14.22	5,486	78,011	18,514	24 K to 18.5 K (-22.86 %)
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Buy	M	3.25	24,000	78,000	0	-24,000 to 0 (-100.00 %)
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Payment of Exercise	F	14.22	3,657	52,003	12,343	16 K to 12.3 K (-22.86 %)
Nov 22 2006	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Buy	M	3.25	16,000	52,000	0	-16,000 to 0 (-100.00 %)
Sep 19 2006	NGS	NATURAL GAS SERVIC ...	Taylor Stephen Charles	President and CEO	Buy	P	12.50	1,000	12,496	1,000	0 to 1,000
Sep 19 2006	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP - Technical Serv ...	Buy	P	12.55	1,000	12,548	1,000	0 to 1,000
Sep 19 2006	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	VP - Accounting & T ...	Buy	P	12.49	350	4,372	350	0 to 350
Mar 30 2006	NGS	NATURAL GAS SERVIC ...	HUGHES WILLIAM F JR	Director	Sell	S	16.49	50,000	824,500	10,000	60 K to 10 K (-83.33 %)
Mar 29 2006	NGS	NATURAL GAS SERVIC ...	Hazlett James R	VP Technical Servi ...	Sell	S	16.49	10,000	164,900	50,976	61 K to 51 K (-16.40 %)
Mar 29 2006	NGS	NATURAL GAS SERVIC ...	HENSLEY PAUL D	Director	Sell	S	16.49	100,000	1,649,000	326,829	426.8 K to 326.8 K (-23.43 %)
Jan 19 2006	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	19.88	150,000	2,982,000	489,272	639.3 K to 489.3 K (-23.46 %)
Jan 19 2006	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	19.21	9,200	176,762	401,102	410.3 K to 401.1 K (-2.24 %)
Jan 04 2006	NGS	NATURAL GAS SERVIC ...	HUGHES WILLIAM F JR	Director	Option Exercise	A	16.96	2,500	42,400	2,500
Jan 04 2006	NGS	NATURAL GAS SERVIC ...	CURTIS CHARLES G	Director	Option Exercise	A	16.96	2,500	42,400	2,500
Jan 04 2006	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Option Exercise	A	16.96	2,500	42,400	2,500
Jan 04 2006	NGS	NATURAL GAS SERVIC ...	STRASHEIM GENE A	Director	Option Exercise	A	16.96	2,500	42,400	2,500
Dec 12 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	24.01	800	19,210	410,302	411.1 K to 410.3 K (-0.19 %)
Dec 08 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	24.00	10,000	240,000	411,102	421.1 K to 411.1 K (-2.37 %)
Dec 08 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	24.00	10,000	240,000	421,102	431.1 K to 421.1 K (-2.32 %)
Dec 06 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	24.05	10,000	240,500	431,102	441.1 K to 431.1 K (-2.27 %)
Dec 06 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	25.67	10,000	256,700	441,102	451.1 K to 441.1 K (-2.22 %)
Dec 06 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	25.46	10,000	254,624	451,102	461.1 K to 451.1 K (-2.17 %)
Dec 06 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	25.17	10,000	251,700	461,102	471.1 K to 461.1 K (-2.12 %)
Dec 06 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	24.92	10,000	249,200	471,102	481.1 K to 471.1 K (-2.08 %)
Dec 06 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	24.66	10,000	246,615	481,102	491.1 K to 481.1 K (-2.04 %)
Dec 06 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Sell	S	24.00	10,000	240,000	491,102	501.1 K to 491.1 K (-2.00 %)
Oct 27 2005	NGS	NATURAL GAS SERVIC ...	STRASHEIM GENE A	Director	Option Exercise	M	5.55	2,500	13,875	0
Oct 27 2005	NGS	NATURAL GAS SERVIC ...	STRASHEIM GENE A	Director	Buy	M	5.55	2,500	13,875	2,500	0 to 2.5 K
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	ROGERS SAMUEL CRAIG	Vice President	Option Exercise	M	6.25	1,000	6,250	0
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	ROGERS SAMUEL CRAIG	Vice President	Buy	M	6.25	1,000	6,250	1,000	0 to 1,000
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	Taylor Stephen Charles	President & CEO	Option Exercise	A	9.22	45,000	414,900	45,000
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	LARKIN WILLIAM R	Vice President	Option Exercise	M	7.50	4,000	30,000	8,000
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	LARKIN WILLIAM R	Vice President	Sell	S	20.70	1,000	20,700	0	1,000 to 0 (-100.00 %)
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	LARKIN WILLIAM R	Vice President	Sell	S	20.10	1,000	20,100	1,000	2 K to 1,000 (-50.00 %)
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	LARKIN WILLIAM R	Vice President	Sell	S	20.00	1,000	20,000	2,000	3 K to 2 K (-33.33 %)
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	LARKIN WILLIAM R	Vice President	Sell	S	20.31	1,000	20,310	3,000	4 K to 3 K (-25.00 %)
Sep 29 2005	NGS	NATURAL GAS SERVIC ...	LARKIN WILLIAM R	Vice President	Buy	M	7.50	4,000	30,000	4,000	0 to 4 K
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	21.18	1,200	25,416	30,520	31.7 K to 30.5 K (-3.78 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	21.45	2,300	49,335	31,720	34 K to 31.7 K (-6.76 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.97	1,600	33,552	34,020	35.6 K to 34 K (-4.49 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	21.25	1,000	21,250	35,620	36.6 K to 35.6 K (-2.73 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	21.36	200	4,272	36,620	36.8 K to 36.6 K (-0.54 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	21.40	700	14,980	36,820	37.5 K to 36.8 K (-1.87 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.15	2,100	42,315	37,520	39.6 K to 37.5 K (-5.30 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.20	3,900	78,780	39,620	43.5 K to 39.6 K (-8.96 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.11	1,400	28,154	43,520	44.9 K to 43.5 K (-3.12 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.14	600	12,084	44,920	45.5 K to 44.9 K (-1.32 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.10	2,400	48,240	45,520	47.9 K to 45.5 K (-5.01 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.12	300	6,036	47,920	48.2 K to 47.9 K (-0.62 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.29	500	10,145	48,220	48.7 K to 48.2 K (-1.03 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.00	1,000	20,000	48,720	49.7 K to 48.7 K (-2.01 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.05	800	16,040	49,720	50.5 K to 49.7 K (-1.58 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.18	3,400	68,612	50,520	53.9 K to 50.5 K (-6.31 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.17	2,900	58,493	53,920	56.8 K to 53.9 K (-5.10 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.21	700	14,147	56,820	57.5 K to 56.8 K (-1.22 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.16	500	10,080	57,520	58 K to 57.5 K (-0.86 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.25	500	10,125	58,020	58.5 K to 58 K (-0.85 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.26	400	8,104	58,520	58.9 K to 58.5 K (-0.68 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.35	400	8,140	58,920	59.3 K to 58.9 K (-0.67 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.48	300	6,144	59,320	59.6 K to 59.3 K (-0.50 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	20.41	300	6,123	59,620	59.9 K to 59.6 K (-0.50 %)
Sep 07 2005	NGS	NATURAL GAS SERVIC ...	WAIT EARL R	CFO & Treasurer	Sell	S	22.00	600	13,200	59,920	60.5 K to 59.9 K (-0.99 %)
Sep 14 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	23.50	6,000	141,000	254,500	260.5 K to 254.5 K (-2.30 %)
Sep 14 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	23.25	300	6,975	260,500	260.8 K to 260.5 K (-0.12 %)
Sep 14 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	23.56	1,100	25,916	260,800	261.9 K to 260.8 K (-0.42 %)
Sep 14 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	23.40	1,600	37,440	261,900	263.5 K to 261.9 K (-0.61 %)
Sep 14 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	23.23	1,000	23,230	263,500	264.5 K to 263.5 K (-0.38 %)
Sep 21 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Option Exercise	C	6.25	391,102	2,444,388	0
Sep 21 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Option Exercise	C	6.25	86,298	539,363	0
Sep 21 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Option Exercise	P	6.25	1,402	8,763	391,102
Sep 21 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Option Exercise	P	6.25	1,098	6,863	48,798
Sep 21 2005	NGS	NATURAL GAS SERVIC ...	Barney Charles L	10% Owner	Gift	G	0.00	45,000	0	501,102	546.1 K to 501.1 K (-8.24 %)
Sep 01 2005	NGS	NATURAL GAS SERVIC ...	SPARKMAN SCOTT W	Secretary	Sell	S	21.25	1,500	31,875	18,500	20 K to 18.5 K (-7.50 %)
Sep 01 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	19.83	600	11,898	264,500	265.1 K to 264.5 K (-0.23 %)
Sep 01 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	19.80	400	7,920	265,100	265.5 K to 265.1 K (-0.15 %)
Sep 01 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	19.75	500	9,875	265,500	266 K to 265.5 K (-0.19 %)
Sep 01 2005	NGS	NATURAL GAS SERVIC ...	YADON RICHARD L	Director	Sell	S	19.73	1,000	19,730	266,000	267 K to 266 K (-0.37 %)

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