PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

TOCQUEVILLE ASSET MANAGEMENT L.P.'s Holding History (CIK: 0000883961)

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

Q2 2014

Shares 2,750 Value ($000) $225 Avg Close $67.73 Range $58.06 - $83.06

Q1 2014

Shares 3,600 Value ($000) $244 Avg Close $74.38 Range $62.09 - $84.00

Q4 2013

Shares 3,600 Value ($000) $256 Avg Close $77.51 Range $65.52 - $89.97

Q3 2013

Shares 3,600 Value ($000) $275 Avg Close $69.23 Range $61.46 - $80.66

Q2 2013

Shares 4,300 Value ($000) $279 Avg Close $53.72 Range $43.62 - $67.40

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2014	2,750	$225	$67.73	$58.06 - $83.06
Q1 2014	3,600	$244	$74.38	$62.09 - $84.00
Q4 2013	3,600	$256	$77.51	$65.52 - $89.97
Q3 2013	3,600	$275	$69.23	$61.46 - $80.66
Q2 2013	4,300	$279	$53.72	$43.62 - $67.40