MESA LABORATORIES INC /CO/ - Director's Dealing 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MESA LABORATORIES INC /CO (MLAB)
CIK: 0000724004
Period of Report: 2015-10-07

Reporting Person: CAMPBELL H STUART (Director)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-10-07	Common Stock	M	250	$29.2	Acquired	79098	Direct
2015-10-07	Common Stock	M	250	$50.5	Acquired	79348	Direct
2015-10-07	Common Stock	M	250	$51.85	Acquired	79598	Direct
2015-10-07	Common Stock	M	171	$89.7	Acquired	79769	Direct
2015-10-07	Common Stock	M	17	$58.51	Acquired	79786	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-10-07	Non-Qualified Stock Options	$29.2	X	250	Disposed	2021-04-06	Common Stock (250)	Direct
2015-10-07	Non-Qualified Stock Option	$50.5	X	250	Disposed	2022-04-02	Common Stock (250)	Direct
2015-10-07	Non Qualified Stock Option	$51.85	X	250	Disposed	2023-04-01	Common Stock (250)	Direct
2015-10-07	Non Qualified Stock Options	$89.7	X	171	Disposed	2022-04-01	Common Stock (171)	Direct
2015-10-07	Non Qualified Stock Option	$58.51	X	17	Disposed	2022-04-02	Common Stock (17)	Direct

F1: 25% of Grant Exercisable on each of the first 4 anniversary dates following 04/06/2011

F2: 25% of Grant Exercisable on each of the first 4 anniversary dates following 04/02/2012

F3: 25% of Grant Exercisable on each of the first 4 anniversary dates following 04/01/2013

F4: 1/7 of Grant Exercisable on each of the first 7 anniversary dates following 04/01/2014

F5: 1/7 of Grant Exercisable on each of the first 7 anniversary dates following 10/02/2014