MESA LABORATORIES INC /CO/ — Director's Dealing 2012

Apr 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MESA LABORATORIES INC /CO (MLAB)
CIK: 0000724004
Period of Report: 2012-04-09

Reporting Person: Adriance Glenn E (Executive Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-04-09	Common Stock	M	1200	$20.75	Acquired	13475	Direct
2012-04-09	Common Stock	M	675	$21.93	Acquired	14150	Direct
2012-04-09	Common Stock	M	1000	$16.6	Acquired	15150	Direct
2012-04-09	Common Stock	M	975	$25.56	Acquired	16125	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-04-09	Incentive Stock Option	$20.75	X	1000	Disposed	2012-10-01	Common Stock (1000)	Direct
2012-04-09	Incentive Stock Option	$21.93	X	675	Disposed	2013-04-01	Common Stock (675)	Direct
2012-04-09	Incentive Stock Option	$16.6	X	1000	Disposed	2014-04-01	Common Stock (1000)	Direct
2012-04-09	Incentive Stock Option	$25.56	X	975	Disposed	2015-04-01	Common Stock (975)	Direct

Footnotes

F1: 25% of original grant exercisable on each anniversary date