Company · CIK 0000724004 · SIC 3823 — Industrial Instruments For Measurement, Display, and Control · Nasdaq

MESA LABORATORIES INC /CO/ · MLAB

Insider activity reported against this company. All insider holders · On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $3.3M · 4sales $29.1M · 61net −$25.7M

Reported at this company — common stock

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Nov 15, 2016 MForm 4 →	Nov 17, 6:16 pm EST	John SakysCFO	1,000	$48.72	$48,720	2,000	—	plan?
Oct 21, 2016 SForm 4 →	Oct 25, 3:18 pm EDT	H Stuart CampbellDirector	4,000	$119.02	$476,080	63,930	−5.89%	plan?
Sep 16, 2016 SForm 4 →	Oct 12, 1:00 pm EDT	H Stuart CampbellDirector	3,000	$115.03	$345,090	67,930	−4.23%	plan? late
Jun 22, 2016 SForm 4 →	Jun 23, 10:57 am EDT	John James SullivanPresident and CEO, Director	4,000	$121.63	$486,520	62,118	−6.05%	plan?
Jun 22, 2016 MForm 4 →	Jun 23, 10:57 am EDT	John James SullivanPresident and CEO, Director	5,000	$18.98	$94,900	66,118	—	plan?
Jun 10, 2016 GForm 4 →	Jun 13, 11:11 am EDT	Robert V DwyerDirector	300	—	—	91,673	—	plan?
Jun 6, 2016 SForm 4 →	Jun 8, 6:42 pm EDT	Glenn E AdrianceCSMO	3,000	$111.74	$335,220	14,100	−17.5%	plan?
Jun 2, 2016 MForm 4 →	Jun 6, 1:39 pm EDT	H Stuart CampbellDirector	859	$63.09	$54,191	70,930	—	plan?
May 27, 2016 GForm 4 →	May 31, 10:51 am EDT	John James SullivanPresident and CEO, Director	275	—	—	61,118	—	plan?
Mar 10, 2016 SForm 4 →	Mar 11, 7:14 pm EST	H Stuart CampbellDirector	6,000	$86.32	$517,914	70,071	−7.89%	plan?
Mar 7, 2016 SForm 4 →	Mar 9, 11:52 am EST	H Stuart CampbellDirector	280	$90.00	$25,200	76,071	−0.37%	plan?
Feb 29, 2016 SForm 4 →	Mar 4, 10:56 am EST	H Stuart CampbellDirector	1,903	$90.84	$172,869	76,351	—	plan? late
Feb 22, 2016 SForm 4 →	Feb 25, 1:16 pm EST	H Stuart CampbellDirector	1,532	$92.90	$142,325	78,254	−1.92%	plan? late
Dec 15, 2015 MForm 4 →	Dec 16, 6:19 pm EST	Michael T BrooksDirector	2,000	$18.98	$37,960	30,900	—	plan?
Dec 4, 2015 MForm 4 →	Dec 8, 9:59 am EST	John V SakysCFO	1,000	$48.72	$48,720	1,000	—	plan?
Nov 6, 2015 SForm 4 →	Nov 9, 11:57 am EST	John James SullivanPresident and CEO	2,400	$112.99	$271,176	61,393	−3.76%	plan?
Nov 5, 2015 MForm 4 →	Nov 9, 11:57 am EST	John James SullivanPresident and CEO	12,700	$44.36	$563,360	63,793	—	plan?
Oct 7, 2015 MForm 4 →	Oct 7, 4:31 pm EDT	H Stuart CampbellDirector	938	$52.47	$49,221	79,786	—	plan?
Sep 22, 2015 PForm 4 →	Sep 23, 5:17 pm EDT	H Stuart CampbellDirector	150	$109.54	$16,431	78,848	+0.19%	plan?
Sep 17, 2015 SForm 4 →	Sep 17, 7:12 pm EDT	Robert V DwyerDirector	2,000	$113.00	$226,000	92,373	−2.12%	plan?
Sep 15, 2015 SForm 4 →	Sep 15, 5:04 pm EDT	Robert V DwyerDirector	3,000	$111.67	$335,010	94,373	−3.08%	plan?
Sep 11, 2015 SForm 4 →	Sep 14, 11:25 am EDT	Robert V DwyerDirector	1,000	$110.00	$110,000	97,373	−1.02%	plan?
Sep 8, 2015 SForm 4 →	Sep 9, 3:03 pm EDT	Robert V DwyerDirector	1,000	$110.39	$110,390	98,373	−1.01%	plan?
Aug 17, 2015 SForm 4 →	Aug 19, 1:27 pm EDT	Robert V DwyerDirector	1,937	$116.50	$225,661	101,373	−1.87%	plan?
Aug 10, 2015 SForm 4 →	Aug 11, 6:09 pm EDT	John Bradley SchmiederDirector	1,000	$113.70	$113,695	82,869	−1.19%	plan?
Aug 7, 2015 SForm 4 →	Aug 21, 10:49 am EDT	Robert V DwyerDirector	2,000	$119.50	$239,000	99,373	−1.97%	plan? late
Jul 7, 2015 JForm 4 →	Oct 19, 2018, 5:27 pm EDT	SEG Ventures, LLCDirector	200,000	$89.98	$2,595,473	0	—	plan? late
Jul 7, 2015 JForm 4 →	Jul 13, 11:23 am EDT	Evan GuilleminDirector	28,845	$89.98	$2,595,473	171,155	—	plan? late
Jun 17, 2015 GForm 4 →	Jul 27, 4:57 pm EDT	Robert V DwyerDirector	300	—	—	103,310	—	plan? late
Apr 27, 2015 FMForm 4 →	Apr 28, 2:19 pm EDT	Luke R SchmiederFormer Director	5,956	$46.88	$279,209	176,293	—	plan?
Apr 27, 2015 FMForm 4 →	Apr 28, 12:34 pm EDT	Luke R SchmiederOther	6,589	$29.83	$196,524	173,749	—	plan?
Mar 24, 2015 MForm 4 →	Mar 25, 11:01 am EDT	John James SullivanPresident and CEO	975	$25.56	$24,921	51,093	—	plan?
Feb 8, 2015 MForm 4 →	Feb 9, 3:55 pm EST	Glenn E AdrianceChief Sales & Marketing Office	975	$25.56	$24,921	17,100	—	plan?
Dec 17, 2014 GForm 4 →	Feb 11, 2015, 6:04 pm EST	David M KellyDirector	600	—	—	6,050	—	plan? late
Dec 30, 2009 PForm 4 →	Oct 19, 2018, 5:27 pm EDT	SEG Ventures, LLCDirector	100,000	$23.88	$2,387,600	200,000	+100%	plan? late

Reported at this company — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 9, 2026 AForm 4 →	Sep 11, 2:13 pm EDT	Mark Christopher CaponeDirector	2,423	—	—	2,423	—
Sep 9, 2026 AForm 4 →	Sep 11, 2:09 pm EDT	Shiraz Shabanali LadiwalaDirector	2,510	—	—	2,510	—
Sep 9, 2026 AForm 4 →	Sep 11, 1:57 pm EDT	Shannon HallDirector	1,774	—	—	1,774	—
Sep 9, 2026 AForm 4 →	Sep 11, 1:42 pm EDT	John James SullivanDirector	1,774	—	—	1,774	—
Sep 9, 2026 AForm 4 →	Sep 11, 1:34 pm EDT	R Tony TripenyDirector	1,774	—	—	1,774	—
Aug 15, 2026 MForm 4 →	Aug 17, 7:40 pm EDT	Mark Christopher CaponeDirector	2,784	—	—	0	—
Aug 15, 2026 MForm 4 →	Aug 17, 7:32 pm EDT	Jennifer Sadie AlltoftDirector	2,784	—	—	0	—
Aug 15, 2026 MForm 4 →	Aug 17, 5:55 pm EDT	Shiraz Shabanali LadiwalaDirector	3,810	—	—	0	—
Aug 15, 2026 MForm 4 →	Aug 17, 5:46 pm EDT	Shannon HallDirector	2,784	—	—	0	—
Aug 15, 2026 MForm 4 →	Aug 17, 5:30 pm EDT	R Tony TripenyDirector	2,784	—	—	0	—
Aug 15, 2026 MForm 4 →	Aug 17, 5:01 pm EDT	John James SullivanDirector	2,784	—	—	0	—
Jun 18, 2026 MForm 4 →	Jun 23, 1:34 pm EDT	Lyndsey Elizabeth CrennenCAO	726	—	—	367	—
Jun 18, 2026 MForm 4 →	Jun 23, 1:02 pm EDT	Brian David ArchboldSVP Operations	3,324	—	—	2,480	—
Jun 18, 2026 MForm 4 →	Jun 23, 12:23 pm EDT	John SakysCFO	3,792	—	—	2,755	—
Jun 15, 2026 AEMForm 4 →	Jun 16, 2:44 pm EDT	Brian David ArchboldSVP Operations	8,562	—	—	4,328	—
Jun 15, 2026 AEMForm 4 →	Jun 16, 2:15 pm EDT	John SakysCFO	15,084	—	—	8,416	—
Feb 20, 2019 XForm 4 →	Feb 20, 6:30 pm EST	Evan GuilleminDirector	1,746	—	—	8,090	—
Feb 11, 2019 XForm 4 →	Feb 13, 7:24 pm EST	Evan GuilleminDirector	3,254	—	—	9,836	—
Feb 6, 2019 XForm 4 →	Feb 7, 11:20 am EST	David M KellyDirector	2,000	—	—	5,090	—
Dec 6, 2018 XForm 4 →	Dec 10, 10:12 am EST	David M KellyDirector	1,700	—	—	7,090	—
Sep 13, 2018 XForm 4 →	Sep 17, 9:41 pm EDT	David M KellyDirector	700	—	—	8,790	—
Aug 15, 2018 XForm 4 →	Aug 15, 6:12 pm EDT	John SakysCFO	1,000	—	—	32,900	—
Jul 31, 2018 XForm 4 →	Aug 1, 11:30 am EDT	John SakysCFO	500	—	—	33,900	—
Jun 15, 2018 XForm 4 →	Jun 15, 3:57 pm EDT	John James SullivanDirector	12,000	—	—	62,550	—
Apr 2, 2018 AForm 4/A →	Apr 27, 11:51 am EDT	Robert V DwyerDirector	450	—	—	6,590	—
Apr 2, 2018 AForm 4 →	Apr 4, 2:29 pm EDT	John Bradley SchmiederDirector	450	—	—	4,450	—
Apr 2, 2018 AForm 4 →	Apr 4, 2:17 pm EDT	David M KellyDirector	450	—	—	9,490	—
Apr 2, 2018 AForm 4 →	Apr 4, 2:10 pm EDT	Evan GuilleminDirector	450	—	—	13,090	—
Apr 2, 2018 AForm 4 →	Apr 4, 1:59 pm EDT	Robert V DwyerDirector	450	—	—	6,590	—	amended
Apr 2, 2018 AForm 4 →	Apr 4, 1:50 pm EDT	H Stuart CampbellDirector	450	—	—	4,793	—
Apr 2, 2018 AForm 4 →	Apr 4, 1:39 pm EDT	Michael T BrooksDirector	450	—	—	12,490	—
Apr 2, 2018 AForm 4 →	Apr 4, 1:30 pm EDT	John James SullivanDirector	450	—	—	74,550	—
Apr 2, 2018 AForm 4 →	Apr 4, 11:57 am EDT	John SakysChief Financial Officer	2,500	—	—	34,400	—
Apr 2, 2018 AForm 4 →	Apr 4, 11:26 am EDT	Gary M OwensPresident and CEO	5,000	—	—	28,000	—
Mar 26, 2018 EForm 4 →	Mar 26, 10:43 am EDT	Glenn E AdrianceCSMO	3,300	—	—	20,838	—
Mar 26, 2018 EForm 4 →	Mar 26, 10:39 am EDT	John SakysCFO	3,300	—	—	31,900	—
Mar 26, 2018 EForm 4 →	Mar 26, 10:35 am EDT	John James SullivanDirector	4,500	—	—	74,100	—
Mar 16, 2018 XForm 4 →	Mar 19, 9:01 am EDT	Michael T BrooksDirector	1,800	—	—	12,040	—
Feb 15, 2018 XForm 4 →	Feb 20, 11:25 am EST	John James SullivanDirector	4,000	—	—	78,600	—
Sep 1, 2017 AForm 4 →	Sep 1, 5:26 pm EDT	Gary M OwensPresident and CEO, Director	2,000	—	—	23,000	—
Jun 20, 2017 XForm 4 →	Jun 20, 6:47 pm EDT	John SakysCFO	1,000	—	—	35,200	—
May 10, 2017 XForm 4 →	May 15, 12:01 pm EDT	John James SullivanPresident and CEO	9,000	—	—	82,600	—	late
Apr 3, 2017 AForm 4/A →	Apr 21, 6:16 pm EDT	John Bradley SchmiederDirector	1,000	—	—	4,000	—
Apr 3, 2017 AForm 4/A →	Apr 21, 6:08 pm EDT	Robert V DwyerDirector	1,000	—	—	6,140	—
Apr 3, 2017 AForm 4/A →	Apr 21, 6:02 pm EDT	Michael T BrooksDirector	1,000	—	—	13,840	—
Apr 3, 2017 AForm 4/A →	Apr 21, 4:18 pm EDT	H Stuart CampbellDirector	1,000	—	—	4,343	—
Apr 3, 2017 AForm 4/A →	Apr 21, 3:54 pm EDT	Evan GuilleminDirector	1,000	—	—	12,640	—
Apr 3, 2017 AForm 4/A →	Apr 21, 12:53 pm EDT	David M KellyDirector	1,000	—	—	9,040	—
Apr 3, 2017 AForm 4 →	Apr 4, 5:18 pm EDT	John SakysCFO	3,500	—	—	36,200	—
Apr 3, 2017 AForm 4 →	Apr 4, 5:13 pm EDT	Glenn E AdrianceCSMO	3,500	—	—	24,138	—
Apr 3, 2017 AForm 4 →	Apr 4, 5:04 pm EDT	John Bradley SchmiederDirector	830	—	—	3,830	—	amended
Apr 3, 2017 AForm 4 →	Apr 4, 4:43 pm EDT	David M KellyDirector	830	—	—	8,870	—	amended
Apr 3, 2017 AForm 4 →	Apr 4, 4:36 pm EDT	Evan GuilleminDirector	830	—	—	12,470	—	amended
Apr 3, 2017 AForm 4 →	Apr 4, 4:23 pm EDT	Robert V DwyerDirector	830	—	—	5,970	—	amended
Apr 3, 2017 AForm 4 →	Apr 4, 4:03 pm EDT	John James SullivanCEO, Director	15,000	—	—	91,600	—
Apr 3, 2017 AForm 4 →	Apr 4, 3:55 pm EDT	H Stuart CampbellDirector	830	—	—	4,173	—	amended
Apr 3, 2017 AForm 4 →	Apr 4, 3:39 pm EDT	Michael T BrooksDirector	830	—	—	13,670	—	amended
Feb 17, 2017 XForm 4 →	Feb 21, 7:24 pm EST	John James SullivanPresident and CEO	9,078	—	—	76,600	—
Feb 13, 2017 XForm 4/A →	Feb 21, 7:33 pm EST	John James SullivanPresident and CEO	5,922	—	—	85,678	—
Feb 13, 2017 XForm 4 →	Feb 15, 6:09 pm EST	John James SullivanPresident and CEO	5,922	—	—	85,678	—	amended
Feb 6, 2017 XForm 4 →	Feb 7, 5:50 pm EST	Glenn E AdrianceCSMO	1,070	—	—	20,638	—
Nov 23, 2016 XForm 4 →	Nov 28, 12:25 pm EST	Glenn E AdrianceCMSO	3,567	—	—	21,708	—
Nov 17, 2016 XForm 4 →	Nov 17, 6:16 pm EST	John SakysCFO	1,000	—	—	32,700	—
Jun 22, 2016 XForm 4 →	Jun 23, 10:57 am EDT	John James SullivanPresident and CEO, Director	5,000	—	—	91,600	—
Jun 2, 2016 XForm 4 →	Jun 6, 1:39 pm EDT	H Stuart CampbellDirector	859	—	—	3,343	—
Apr 1, 2016 AForm 4 →	May 4, 4:48 pm EDT	John SakysCFO	4,600	—	—	33,700	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:56 pm EDT	John Bradley SchmiederDirector	1,000	—	—	3,000	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:52 pm EDT	David M KellyDirector	1,000	—	—	8,040	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:49 pm EDT	Evan GuilleminDirector	1,000	—	—	11,640	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:45 pm EDT	Robert V DwyerDirector	1,000	—	—	5,140	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:41 pm EDT	John James SullivanPresident and CEO	9,200	—	—	96,600	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:36 pm EDT	Michael T BrooksDirector	1,000	—	—	12,840	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:28 pm EDT	H Stuart CampbellDirector	1,000	—	—	4,202	—	late
Apr 1, 2016 AForm 4 →	May 3, 2:19 pm EDT	Glenn E AdrianceChief Sales&Marketing Officer	4,600	—	—	31,900	—	late
Dec 15, 2015 XForm 4 →	Dec 16, 6:19 pm EST	Michael T BrooksDirector	2,000	—	—	11,840	—
Dec 4, 2015 XForm 4 →	Dec 8, 9:59 am EST	John V SakysCFO	1,000	—	—	29,100	—
Nov 5, 2015 XForm 4 →	Nov 9, 11:57 am EST	John James SullivanPresident and CEO	12,700	—	—	87,400	—
Oct 7, 2015 XForm 4 →	Oct 7, 4:31 pm EDT	H Stuart CampbellDirector	938	—	—	3,202	—
Apr 27, 2015 XForm 4 →	Apr 28, 2:19 pm EDT	Luke R SchmiederFormer Director	4,250	—	—	2,070	—
Apr 27, 2015 XForm 4 →	Apr 28, 12:34 pm EDT	Luke R SchmiederOther	5,425	—	—	6,320	—
Apr 1, 2015 AForm 4 →	Apr 3, 8:53 pm EDT	John V SakysChief Financial Officer	10,800	—	—	29,000	—
Apr 1, 2015 AForm 4 →	Apr 3, 8:36 pm EDT	Glenn E AdrianceChief Sales & Mktg. Officer	10,800	—	—	27,575	—
Apr 1, 2015 AForm 4 →	Apr 3, 8:26 pm EDT	John James SullivanPresident and CEO	19,500	—	—	100,100	—
Apr 1, 2015 AForm 4 →	Apr 3, 8:13 pm EDT	David M KellyDirector	1,320	—	—	7,040	—
Apr 1, 2015 AForm 4 →	Apr 3, 8:07 pm EDT	Evan GuilleminDirector	1,320	—	—	10,640	—
Apr 1, 2015 AForm 4 →	Apr 3, 8:02 pm EDT	Robert V DwyerDirector	1,320	—	—	4,140	—
Apr 1, 2015 AForm 4 →	Apr 3, 7:56 pm EDT	Michael T BrooksDirector	1,320	—	—	13,840	—
Apr 1, 2015 AForm 4 →	Apr 3, 7:51 pm EDT	H Stuart CampbellDirector	1,320	—	—	4,140	—
Mar 24, 2015 XForm 4 →	Mar 25, 11:01 am EDT	John James SullivanPresident and CEO	975	—	—	80,600	—
Feb 8, 2015 XForm 4 →	Feb 9, 3:55 pm EST	Glenn E AdrianceChief Sales & Marketing Office	975	—	—	16,775	—
Sep 9, 2009 AForm 4 →	Sep 11, 2026, 2:02 pm EDT	Jennifer Sadie AlltoftDirector	1,774	—	—	1,774	—	late