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

Feb 21, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MESA LABORATORIES INC /CO (MLAB)
CIK: 0000724004
Period of Report: 2012-02-20

Reporting Person: PETERSON STEVEN W (CFO and Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-20	Mesa Laboratories, Inc. Common Stock	F	1124	$50.49	Disposed	50343	Direct
2012-02-20	Mesa Laboratories, Inc. Common Stock	M	3000	$18.98	Acquired	53343	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-20	Incentive Stock Options	$18.98	X	3000	Disposed	2012-05-11	Mesa Laboratories, Inc. Common Stock (3000)	Direct

Footnotes

F1: Option vest 25% on each of the first four anniversary dates beginning 05/11/2008.