PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

BAMCO INC /NY/'s Holding History (CIK: 0001017918)

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

Q1 2014

Shares 585 Value ($000) $47 Avg Close $74.38 Range $62.09 - $84.00

Q4 2013

Shares 100,000 Value ($000) $7,118 Avg Close $77.51 Range $65.52 - $89.97

Q3 2013

Shares 350,000 Value ($000) $26,736 Avg Close $69.23 Range $61.46 - $80.66

Q2 2013

Shares 350,000 Value ($000) $22,739 Avg Close $53.72 Range $43.62 - $67.40

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	585	$47	$74.38	$62.09 - $84.00
Q4 2013	100,000	$7,118	$77.51	$65.52 - $89.97
Q3 2013	350,000	$26,736	$69.23	$61.46 - $80.66
Q2 2013	350,000	$22,739	$53.72	$43.62 - $67.40