MESA LABORATORIES INC /CO/ — Director's Dealing 2021

Dec 15, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MESA LABORATORIES INC /CO/ (MLAB)
CIK: 0000724004
Period of Report: 2021-12-14

Reporting Person: Archbold Brian David (SVP Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-14	Common Stock	M	210	$142.4	Acquired	364	Direct
2021-12-14	Common Stock	M	532	$203.54	Acquired	896	Direct
2021-12-14	Common Stock	M	917	$226.72	Acquired	1813	Direct
2021-12-14	Common Stock	S	1659	$325.02	Disposed	154	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-14	Non Qualified Stock Option	$142	X	210	Disposed	2024-04-02	Common Stock (210)	Direct
2021-12-14	Non Qualified Stock Option	$203.54	X	532	Disposed	2025-06-10	Common Stock (532)	Direct
2021-12-14	Non Qualified Stock Option	$226.72	X	917	Disposed	2026-06-15	Common Stock (917)	Direct

Footnotes

F1: 1/5 exercisable on each anniversary date of the 04-02-2018 grant date

F2: 1/4 exercisable on each anniversary date of the 06-10-2019 grant date

F3: 1/3 exercisable on each anniversary date of the 06-15-2020 grant date