PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

EMERALD ADVISERS, LLC's Holding History (CIK: 0001015083)

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

Q4 2014

Shares 138,537 Value ($000) $9,304 Avg Close $65.74 Range $54.97 - $73.46

Q3 2014

Shares 78,600 Value ($000) $5,423 Avg Close $78.24 Range $68.88 - $94.23

Q2 2014

Shares 103,973 Value ($000) $8,517 Avg Close $67.73 Range $58.06 - $83.06

Q1 2014

Shares 104,445 Value ($000) $7,068 Avg Close $74.38 Range $62.09 - $84.00

Q4 2013

Shares 60,220 Value ($000) $4,286 Avg Close $77.51 Range $65.52 - $89.97

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	138,537	$9,304	$65.74	$54.97 - $73.46
Q3 2014	78,600	$5,423	$78.24	$68.88 - $94.23
Q2 2014	103,973	$8,517	$67.73	$58.06 - $83.06
Q1 2014	104,445	$7,068	$74.38	$62.09 - $84.00
Q4 2013	60,220	$4,286	$77.51	$65.52 - $89.97