MESA LABS INC

Ticker: MLAB CUSIP: 59064R109 Class: Common Stock

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q3 2017

Shares 1,600 Value ($000) $239 Avg Close $136.33 Range $123.49 - $150.04

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	1,600	$239	$136.33	$123.49 - $150.04