PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

GILDER GAGNON HOWE & CO LLC's Holding History (CIK: 0000902464)

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

Q4 2015

Shares 166,697 Value ($000) $10,617 Avg Close $64.50 Range $58.84 - $69.48

Q3 2015

Shares 163,293 Value ($000) $10,941 Avg Close $71.25 Range $65.82 - $79.95

Q2 2015

Shares 169,635 Value ($000) $11,447 Avg Close $70.59 Range $65.84 - $79.00

Q1 2015

Shares 415,231 Value ($000) $29,066 Avg Close $67.69 Range $57.30 - $74.82

Q4 2014

Shares 701,628 Value ($000) $47,121 Avg Close $65.74 Range $54.97 - $73.46

Q3 2014

Shares 686,908 Value ($000) $47,397 Avg Close $78.24 Range $68.88 - $94.23

Q2 2014

Shares 689,842 Value ($000) $56,512 Avg Close $67.73 Range $58.06 - $83.06

Q1 2014

Shares 700,061 Value ($000) $47,373 Avg Close $74.38 Range $62.09 - $84.00

Q4 2013

Shares 218,663 Value ($000) $15,564 Avg Close $77.51 Range $65.52 - $89.97

Q3 2013

Shares 220,881 Value ($000) $16,873 Avg Close $69.23 Range $61.46 - $80.66

Q2 2013

Shares 221,835 Value ($000) $14,412,620 Avg Close $53.72 Range $43.62 - $67.40

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	166,697	$10,617	$64.50	$58.84 - $69.48
Q3 2015	163,293	$10,941	$71.25	$65.82 - $79.95
Q2 2015	169,635	$11,447	$70.59	$65.84 - $79.00
Q1 2015	415,231	$29,066	$67.69	$57.30 - $74.82
Q4 2014	701,628	$47,121	$65.74	$54.97 - $73.46
Q3 2014	686,908	$47,397	$78.24	$68.88 - $94.23
Q2 2014	689,842	$56,512	$67.73	$58.06 - $83.06
Q1 2014	700,061	$47,373	$74.38	$62.09 - $84.00
Q4 2013	218,663	$15,564	$77.51	$65.52 - $89.97
Q3 2013	220,881	$16,873	$69.23	$61.46 - $80.66
Q2 2013	221,835	$14,412,620	$53.72	$43.62 - $67.40