IPG PHOTONICS CORP

Ticker: IPGP CUSIP: 44980X109 Class: Common Stock

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

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

Q2 2017

Shares 89,170 Value ($000) $12,939 Avg Close $134.25 Range $116.82 - $149.29

Q1 2017

Shares 81,165 Value ($000) $9,797 Avg Close $113.15 Range $95.04 - $124.27

Q1 2014

Shares 145,191 Value ($000) $10,320 Avg Close $70.26 Range $63.53 - $77.57

Q4 2013

Shares 70,170 Value ($000) $5,446 Avg Close $67.99 Range $56.44 - $79.00

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2017	89,170	$12,939	$134.25	$116.82 - $149.29
Q1 2017	81,165	$9,797	$113.15	$95.04 - $124.27
Q1 2014	145,191	$10,320	$70.26	$63.53 - $77.57
Q4 2013	70,170	$5,446	$67.99	$56.44 - $79.00