IPG PHOTONICS CORP

Ticker: IPGP CUSIP: 44980X109 Class: Common Stock

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q1 2014

Shares 22,900 Value ($000) $1,628 Avg Close $70.26 Range $63.53 - $77.57

Q4 2013

Shares 18,900 Value ($000) $1,467 Avg Close $67.99 Range $56.44 - $79.00

Q3 2013

Shares 13,000 Value ($000) $733 Avg Close $58.50 Range $53.28 - $67.81

Q2 2013

Shares 162,595 Value ($000) $9,874 Avg Close $61.08 Range $54.32 - $67.24

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	22,900	$1,628	$70.26	$63.53 - $77.57
Q4 2013	18,900	$1,467	$67.99	$56.44 - $79.00
Q3 2013	13,000	$733	$58.50	$53.28 - $67.81
Q2 2013	162,595	$9,874	$61.08	$54.32 - $67.24