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

Overview of all insider trading transactions in MESA LABORATORIES INC /CO/. Get notifications about new insider transactions in MESA LABORATORIES INC /CO/ for free.

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Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
Apr 02 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Option Exercise	A	50.50	1,000	50,500	1,000
Apr 02 2012	MLAB	MESA LABORATORIES ...	Adriance Glenn E	Executive Vice Pres ...	Option Exercise	A	50.50	4,000	202,000	4,000
Apr 02 2012	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Option Exercise	A	50.50	8,000	404,000	8,000
Apr 02 2012	MLAB	MESA LABORATORIES ...	BROOKS MICHAEL T	Director	Option Exercise	A	50.50	1,000	50,500	1,000
Apr 02 2012	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Option Exercise	A	50.50	4,000	202,000	4,000
Apr 02 2012	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	A	50.50	1,000	50,500	1,000
Mar 26 2012	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Gift	G	0.00	2,000	0	185,328	187.3 K to 185.3 K (-1.07 %)
Mar 13 2012	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Option Exercise	X	12.56	9,030	113,417	102,200
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Option Exercise	X	25.56	500	12,780	1,500
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Option Exercise	X	16.60	1,200	19,920	1,200
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Option Exercise	X	21.93	1,350	29,606	450
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Option Exercise	X	18.98	2,000	37,960	0
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Buy	M	25.56	500	12,780	124,010	123.5 K to 124 K (+0.40 %)
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Buy	M	16.60	1,200	19,920	123,510	122.3 K to 123.5 K (+0.98 %)
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Buy	M	21.93	1,350	29,606	122,310	121 K to 122.3 K (+1.12 %)
Mar 21 2012	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Buy	M	18.98	2,000	37,960	120,960	119 K to 121 K (+1.68 %)
Feb 21 2012	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Option Exercise	X	18.98	3,000	56,940	16,100
Feb 21 2012	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Buy	M	18.98	3,000	56,940	53,343	50.3 K to 53.3 K (+5.96 %)
Feb 21 2012	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Payment of Exercise	F	50.49	1,124	56,751	50,343	51.5 K to 50.3 K (-2.18 %)
Aug 31 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	VP Sales and Market ...	Buy	P	33.59	1,000	33,590	12,275	11.3 K to 12.3 K (+8.87 %)
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	18.98	1,000	18,980	0
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	21.93	450	9,869	0
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	16.60	600	9,960	0
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	25.56	500	12,780	0
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	18.98	1,000	18,980	101,298	100.3 K to 101.3 K (+1.00 %)
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	21.93	450	9,869	100,298	99.8 K to 100.3 K (+0.45 %)
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	16.60	600	9,960	99,848	99.2 K to 99.8 K (+0.60 %)
Jun 28 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	25.56	500	12,780	99,248	98.7 K to 99.2 K (+0.51 %)
Jun 13 2011	MLAB	MESA LABORATORIES ...	KELLY DAVID M	Director	Buy	P	30.00	300	9,000	8,000	7.7 K to 8 K (+3.90 %)
Jun 15 2011	MLAB	MESA LABORATORIES ...	KELLY DAVID M	Director	Buy	P	30.95	450	13,928	8,450	8 K to 8.5 K (+5.63 %)
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Option Exercise	X	25.56	975	24,921	0
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Option Exercise	X	25.56	275	7,029	0
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Option Exercise	X	16.60	2,000	33,200	0
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Option Exercise	X	20.75	2,400	49,800	0
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Option Exercise	X	21.93	2,025	44,408	0
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Option Exercise	X	20.75	3,600	74,700	0
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Buy	M	25.56	975	24,921	11,275	10.3 K to 11.3 K (+9.47 %)
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Buy	M	25.56	275	7,029	10,300	10 K to 10.3 K (+2.74 %)
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Buy	M	16.60	2,000	33,200	10,025	8 K to 10 K (+24.92 %)
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Buy	M	20.75	2,400	49,800	8,025	5.6 K to 8 K (+42.67 %)
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Buy	M	21.93	2,025	44,408	5,625	3.6 K to 5.6 K (+56.25 %)
Apr 26 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	V.P. Sales & Market ...	Buy	M	20.75	3,600	74,700	3,600	0 to 3.6 K
Apr 26 2011	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Option Exercise	X	14.50	2,700	39,150	0
Apr 26 2011	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Buy	M	14.50	2,700	39,150	20,962	18.3 K to 21 K (+14.78 %)
Apr 26 2011	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Payment of Exercise	F	30.25	700	21,175	18,262	19 K to 18.3 K (-3.69 %)
Apr 18 2011	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Option Exercise	X	14.50	5,000	72,500	0
Apr 18 2011	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Buy	M	14.50	5,000	72,500	118,960	114 K to 119 K (+4.39 %)
Apr 07 2011	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Option Exercise	X	29.20	8,800	256,960	8,800
Apr 07 2011	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Option Exercise	X	29.20	4,400	128,480	4,400
Apr 07 2011	MLAB	MESA LABORATORIES ...	Adriance Glenn E	VP Sales and Market ...	Option Exercise	X	29.20	4,400	128,480	4,400
Apr 07 2011	MLAB	MESA LABORATORIES ...	KELLY DAVID M	Director	Option Exercise	X	29.20	1,000	29,200	1,000
Apr 07 2011	MLAB	MESA LABORATORIES ...	GUILLEMIN EVAN	Director	Option Exercise	X	29.20	1,000	29,200	1,000
Apr 07 2011	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	29.20	1,000	29,200	1,000
Apr 07 2011	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Option Exercise	X	29.20	1,000	29,200	1,000
Apr 07 2011	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	29.20	1,000	29,200	1,000
Apr 07 2011	MLAB	MESA LABORATORIES ...	BROOKS MICHAEL T	Director	Option Exercise	X	29.20	1,000	29,200	1,000
Mar 03 2011	MLAB	MESA LABORATORIES ...	GUILLEMIN EVAN	Director	Buy	P	29.00	10,000	290,000	200,000	190 K to 200 K (+5.26 %)
Mar 03 2011	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO, Secretary	Sell	S	29.00	10,000	290,000	51,467	61.5 K to 51.5 K (-16.27 %)
Jan 03 2011	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Option Exercise	X	14.50	675	9,788	14,700
Jan 03 2011	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Buy	M	14.50	675	9,788	61,467	60.8 K to 61.5 K (+1.11 %)
Jan 03 2011	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Payment of Exercise	F	31.49	310	9,762	60,792	61.1 K to 60.8 K (-0.51 %)
Jan 03 2011	MLAB	MESA LABORATORIES ...	KELLY DAVID M	Director	Buy	P	30.00	1,700	51,000	7,700	6 K to 7.7 K (+28.33 %)
Dec 22 2010	MLAB	MESA LABORATORIES ...	GUILLEMIN EVAN	Director	Buy	P	24.75	40,000	990,000	190,000	150 K to 190 K (+26.67 %)
Dec 22 2010	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Sell	S	24.75	40,000	990,000	113,960	154 K to 114 K (-25.98 %)
Dec 06 2010	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Option Exercise	X	14.80	4,000	59,200	0
Dec 06 2010	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Buy	M	14.80	4,000	59,200	18,962	15 K to 19 K (+26.73 %)
Oct 20 2010	MLAB	MESA LABORATORIES ...	KELLY DAVID M	Director	Option Exercise	A	23.10	1,400	32,340	0
Oct 20 2010	MLAB	MESA LABORATORIES ...	KELLY DAVID M	Director	Grant	A	0.00	1,000	0	6,000	5 K to 6 K (+20.00 %)
Oct 13 2010	MLAB	MESA LABORATORIES ...	GUILLEMIN EVAN	Director	Buy	P	21.52	30,000	645,600	150,000	120 K to 150 K (+25.00 %)
Oct 13 2010	MLAB	MESA LABORATORIES ...	Dwyer Robert V	Director	Sell	S	21.52	30,000	645,600	153,960	184 K to 154 K (-16.31 %)
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	11.91	750	8,933	0
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	15.44	1,350	20,844	0
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	18.98	500	9,490	0
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	21.93	900	19,737	0
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	16.60	600	9,960	0
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	11.91	750	8,933	98,748	98 K to 98.7 K (+0.77 %)
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	15.44	1,350	20,844	97,998	96.6 K to 98 K (+1.40 %)
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	18.98	500	9,490	96,648	96.1 K to 96.6 K (+0.52 %)
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	21.93	900	19,737	96,148	95.2 K to 96.1 K (+0.94 %)
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	16.60	600	9,960	95,248	94.6 K to 95.2 K (+0.63 %)
May 24 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Payment of Exercise	F	25.50	2,702	68,901	94,648	97.4 K to 94.6 K (-2.78 %)
May 24 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Option Exercise	X	5.91	1,500	8,865	0
May 24 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Option Exercise	X	7.00	2,000	14,000	0
May 24 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Option Exercise	X	10.00	3,000	30,000	0
May 24 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Buy	M	5.91	1,500	8,865	74,323	72.8 K to 74.3 K (+2.06 %)
May 24 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Buy	M	7.00	2,000	14,000	72,823	70.8 K to 72.8 K (+2.82 %)
May 24 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Buy	M	10.00	3,000	30,000	70,823	67.8 K to 70.8 K (+4.42 %)
May 24 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Payment of Exercise	F	23.77	2,220	52,769	67,823	70 K to 67.8 K (-3.17 %)
May 21 2010	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	25.56	2,000	51,120	2,000
May 21 2010	MLAB	MESA LABORATORIES ...	GUILLEMIN EVAN	Director	Option Exercise	X	25.56	2,000	51,120	2,000
May 21 2010	MLAB	MESA LABORATORIES ...	Dwyer Robert V	President of Sub.	Option Exercise	X	25.56	2,000	51,120	2,000
May 21 2010	MLAB	MESA LABORATORIES ...	Adriance Glenn E	VP Sales and Market ...	Option Exercise	X	25.56	3,900	99,684	3,900
May 21 2010	MLAB	MESA LABORATORIES ...	Adriance Glenn E	VP Sales and Market ...	Option Exercise	X	25.56	1,100	28,116	1,100
May 21 2010	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Option Exercise	X	25.56	3,900	99,684	3,900
May 21 2010	MLAB	MESA LABORATORIES ...	Sullivan John James	President and CEO	Option Exercise	X	25.56	6,100	155,916	6,100
May 21 2010	MLAB	MESA LABORATORIES ...	BROOKS MICHAEL T	Director	Option Exercise	X	25.56	2,000	51,120	2,000
May 21 2010	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	25.56	2,000	51,120	2,000
May 21 2010	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Option Exercise	X	25.56	3,900	99,684	3,900
May 21 2010	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Option Exercise	X	25.56	1,100	28,116	1,100
May 21 2010	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Option Exercise	X	25.56	2,000	51,120	2,000
Jan 08 2010	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Option Exercise	X	11.91	3,000	35,730	0
Jan 08 2010	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Buy	M	11.91	3,000	35,730	14,933	11.9 K to 14.9 K (+25.14 %)
Jan 08 2010	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Payment of Exercise	F	27.94	1,276	35,651	11,933	13.2 K to 11.9 K (-9.66 %)
Jan 07 2010	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Option Exercise	X	14.50	2,025	29,363	0
Jan 07 2010	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Buy	M	14.50	2,025	29,363	61,102	59.1 K to 61.1 K (+3.43 %)
Jan 07 2010	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO and Secretary	Payment of Exercise	F	27.44	1,068	29,306	59,077	60.1 K to 59.1 K (-1.78 %)
Dec 31 2009	MLAB	MESA LABORATORIES ...	GUILLEMIN EVAN	Director	Buy	P	23.10	20,000	462,000	120,000	100 K to 120 K (+20.00 %)
Dec 31 2009	MLAB	MESA LABORATORIES ...	BROOKS MICHAEL T	Director	Sell	S	23.10	10,000	231,000	19,200	29.2 K to 19.2 K (-34.25 %)
Dec 31 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	CFO, Secretary	Sell	S	23.10	10,000	231,000	60,145	70.1 K to 60.1 K (-14.26 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	21.93	450	9,869	1,350
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	18.98	1,000	18,980	1,000
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	14.50	2,025	29,363	675
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	11.91	3,000	35,730	0
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	9.89	3,000	29,670	0
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	7.00	2,000	14,000	0
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	5.91	1,000	5,910	0
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Gift	G	0.00	2,000	0	187,328	189.3 K to 187.3 K (-1.06 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Buy	M	21.93	450	9,869	189,378	188.9 K to 189.4 K (+0.24 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Buy	M	18.98	1,000	18,980	188,928	187.9 K to 188.9 K (+0.53 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Buy	M	14.50	2,025	29,363	187,928	185.9 K to 187.9 K (+1.09 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Buy	M	11.91	3,000	35,730	185,903	182.9 K to 185.9 K (+1.64 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Buy	M	9.89	3,000	29,670	182,903	179.9 K to 182.9 K (+1.67 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Buy	M	7.00	2,000	14,000	179,903	177.9 K to 179.9 K (+1.12 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Buy	M	5.91	1,000	5,910	177,903	176.9 K to 177.9 K (+0.57 %)
Nov 27 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Payment of Exercise	F	24.25	5,909	143,293	176,903	182.8 K to 176.9 K (-3.23 %)
Nov 24 2009	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Sell	D	24.43	2,000	48,860	13,117	15.1 K to 13.1 K (-13.23 %)
Nov 03 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP-Finance,CFO & Se ...	Option Exercise	X	11.91	3,000	35,730	0
Nov 03 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP-Finance,CFO & Se ...	Buy	M	11.91	3,000	35,730	70,145	67.1 K to 70.1 K (+4.47 %)
Nov 03 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP-Finance,CFO & Se ...	Payment of Exercise	F	24.10	1,480	35,668	67,145	68.6 K to 67.1 K (-2.16 %)
Apr 16 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP Finance, CFO, Se ...	Option Exercise	X	9.89	1,000	9,890	0
Apr 16 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP Finance, CFO, Se ...	Buy	M	9.89	1,000	9,890	68,625	67.6 K to 68.6 K (+1.48 %)
Apr 16 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP Finance, CFO, Se ...	Payment of Exercise	F	20.45	475	9,714	67,625	68.1 K to 67.6 K (-0.70 %)
Apr 02 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	Director	Option Exercise	X	16.60	2,400	39,840	2,400
Apr 02 2009	MLAB	MESA LABORATORIES ...	Dwyer Robert V	President of sub	Option Exercise	X	16.60	2,400	39,840	2,400
Apr 02 2009	MLAB	MESA LABORATORIES ...	Adriance Glenn E	VP Sales and Market ...	Option Exercise	X	16.60	4,000	66,400	4,000
Apr 02 2009	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Option Exercise	X	16.60	2,000	33,200	2,000
Apr 02 2009	MLAB	MESA LABORATORIES ...	Sullivan John James	President, CEO	Option Exercise	X	16.60	6,000	99,600	6,000
Apr 02 2009	MLAB	MESA LABORATORIES ...	DUKE PAUL D	Director	Option Exercise	X	16.60	2,400	39,840	2,400
Apr 02 2009	MLAB	MESA LABORATORIES ...	BROOKS MICHAEL T	Director	Option Exercise	X	16.60	2,400	39,840	2,400
Apr 02 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP Finance, CFO, Se ...	Option Exercise	X	16.60	4,000	66,400	4,000
Apr 02 2009	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	16.60	2,400	39,840	2,400
Feb 12 2009	MLAB	MESA LABORATORIES ...	SCHMIEDER LUKE R	CEO, Chairman, Trea ...	Gift	G	0.00	16,250	0	182,812	199.1 K to 182.8 K (-8.16 %)
Jan 02 2009	MLAB	MESA LABORATORIES ...	PETERSON STEVEN W	VP Finance, CFO, Se ...	Sell	S	17.42	2,000	34,840	68,100	70.1 K to 68.1 K (-2.85 %)
Nov 25 2008	MLAB	MESA LABORATORIES ...	Sullivan John James	President and COO	Option Exercise	X	12.56	5,970	74,983	0
Nov 25 2008	MLAB	MESA LABORATORIES ...	Sullivan John James	President and COO	Buy	M	12.56	5,970	74,983	15,117	9.1 K to 15.1 K (+65.27 %)
Jul 16 2008	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	11.91	750	8,933	750
Jul 16 2008	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	10.00	1,000	10,000	0
Jul 16 2008	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	11.91	750	8,933	97,350	96.6 K to 97.4 K (+0.78 %)
Jul 16 2008	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Buy	M	10.00	1,000	10,000	96,600	95.6 K to 96.6 K (+1.05 %)
Jun 03 2008	MLAB	MESA LABORATORIES ...	CAMPBELL H STUART	Director	Option Exercise	X	18.98	500	9,490	1,500

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