PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

Calamos Advisors LLC's Holding History (CIK: 0001316507)

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

Q4 2014

Shares 206,259 Value ($000) $13,852 Avg Close $65.74 Range $54.97 - $73.46

Q3 2014

Shares 207,106 Value ($000) $14,290 Avg Close $78.24 Range $68.88 - $94.23

Q2 2014

Shares 241,897 Value ($000) $19,816 Avg Close $67.73 Range $58.06 - $83.06

Q1 2014

Shares 260,680 Value ($000) $17,640 Avg Close $74.38 Range $62.09 - $84.00

Q4 2013

Shares 251,795 Value ($000) $17,923 Avg Close $77.51 Range $65.52 - $89.97

Q3 2013

Shares 4,840 Value ($000) $370 Avg Close $69.23 Range $61.46 - $80.66

Q2 2013

Shares 22,195 Value ($000) $1,442 Avg Close $53.72 Range $43.62 - $67.40

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	206,259	$13,852	$65.74	$54.97 - $73.46
Q3 2014	207,106	$14,290	$78.24	$68.88 - $94.23
Q2 2014	241,897	$19,816	$67.73	$58.06 - $83.06
Q1 2014	260,680	$17,640	$74.38	$62.09 - $84.00
Q4 2013	251,795	$17,923	$77.51	$65.52 - $89.97
Q3 2013	4,840	$370	$69.23	$61.46 - $80.66
Q2 2013	22,195	$1,442	$53.72	$43.62 - $67.40