PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

Select Equity Group, L.P.'s Holding History (CIK: 0001592643)

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

Q4 2025

Shares 11,919 Value ($000) $603 Avg Close $51.15 Range $45.10 - $55.90

Q3 2025

Shares 52,446 Value ($000) $2,624 Avg Close $45.82 Range $38.48 - $51.96

Q2 2021

Shares 2,181 Value ($000) $200,216 Avg Close $98.50 Range $82.60 - $127.65

Q4 2020

Shares 1,946 Value ($000) $298,516 Avg Close $141.05 Range $113.62 - $203.88

Q3 2020

Shares 2,360 Value ($000) $305,620 Avg Close $131.45 Range $106.69 - $164.99

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	11,919	$603	$51.15	$45.10 - $55.90
Q3 2025	52,446	$2,624	$45.82	$38.48 - $51.96
Q2 2021	2,181	$200,216	$98.50	$82.60 - $127.65
Q4 2020	1,946	$298,516	$141.05	$113.62 - $203.88
Q3 2020	2,360	$305,620	$131.45	$106.69 - $164.99