MESA LABS INC

Ticker: MLAB CUSIP: 59064R109 Class: Common Stock

ONTARIO TEACHERS PENSION PLAN BOARD's Holding History (CIK: 0000937567)

Note: Option positions (PUT/CALL) are excluded.

Q4 2019

Shares 1,205 Value ($000) $301 Avg Close $228.21 Range $201.87 - $248.54

Q3 2019

Shares 2,850 Value ($000) $678 Avg Close $225.06 Range $200.11 - $261.29

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2019	1,205	$301	$228.21	$201.87 - $248.54
Q3 2019	2,850	$678	$225.06	$200.11 - $261.29