PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

Capital Research Global Investors's Holding History (CIK: 0001422848)

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

Q3 2017

Shares 282,000 Value ($000) $22,645 Avg Close $72.28 Range $66.85 - $80.40

Q2 2017

Shares 466,700 Value ($000) $31,386 Avg Close $60.44 Range $48.70 - $70.10

Q1 2017

Shares 466,700 Value ($000) $23,848 Avg Close $52.95 Range $48.00 - $60.25

Q4 2016

Shares 466,700 Value ($000) $23,965 Avg Close $52.43 Range $43.10 - $59.65

Q3 2016

Shares 466,700 Value ($000) $27,960 Avg Close $57.54 Range $50.50 - $61.62

Q2 2016

Shares 291,000 Value ($000) $16,750 Avg Close $66.74 Range $55.07 - $82.06

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	282,000	$22,645	$72.28	$66.85 - $80.40
Q2 2017	466,700	$31,386	$60.44	$48.70 - $70.10
Q1 2017	466,700	$23,848	$52.95	$48.00 - $60.25
Q4 2016	466,700	$23,965	$52.43	$43.10 - $59.65
Q3 2016	466,700	$27,960	$57.54	$50.50 - $61.62
Q2 2016	291,000	$16,750	$66.74	$55.07 - $82.06