PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

GREAT LAKES ADVISORS, LLC's Holding History (CIK: 0001078013)

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

Q1 2021

Shares 3,103 Value ($000) $378 Avg Close $166.30 Range $109.17 - $286.57

Q4 2020

Shares 3,385 Value ($000) $519 Avg Close $141.05 Range $113.62 - $203.88

Q3 2020

Shares 3,399 Value ($000) $440 Avg Close $131.45 Range $106.69 - $164.99

Q2 2020

Shares 3,402 Value ($000) $383 Avg Close $102.64 Range $66.01 - $136.85

Q1 2020

Shares 3,625 Value ($000) $276 Avg Close $92.67 Range $63.19 - $114.75

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	3,103	$378	$166.30	$109.17 - $286.57
Q4 2020	3,385	$519	$141.05	$113.62 - $203.88
Q3 2020	3,399	$440	$131.45	$106.69 - $164.99
Q2 2020	3,402	$383	$102.64	$66.01 - $136.85
Q1 2020	3,625	$276	$92.67	$63.19 - $114.75