PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q4 2025
Shares 15,504 Value ($000) $784 Avg Close $51.15 Range $45.10 - $55.90
Q3 2025
Shares 20,886 Value ($000) $1,045 Avg Close $45.82 Range $38.48 - $51.96
Q2 2022
Shares 12,089 Value ($000) $578 Avg Close $46.37 Range $39.36 - $55.10
Q1 2022
Shares 12,593 Value ($000) $666 Avg Close $52.62 Range $45.63 - $61.14
Q4 2021
Shares 13,300 Value ($000) $683 Avg Close $59.00 Range $47.57 - $79.27
Q1 2021
Shares 5,254 Value ($000) $640 Avg Close $166.30 Range $109.17 - $286.57
Q2 2020
Shares 4,374 Value ($000) $492 Avg Close $102.64 Range $66.01 - $136.85
Q3 2016
Shares 6,417 Value ($000) $384 Avg Close $57.54 Range $50.50 - $61.62
Q4 2013
Shares 11,000 Value ($000) $783 Avg Close $77.51 Range $65.52 - $89.97
Q2 2013
Shares 33,578 Value ($000) $2,182 Avg Close $53.72 Range $43.62 - $67.40