New Post Public Reply Private Reply Replies (0) Message Board ← Newer Older → Lucky Jimmy Oct 20, 2017 at 7:31 PM 141 PRLB +3.00 total advance today 10/20/17. Proto Labs Inc $PRLB 83.05 Stock hit a High of 83.45 and 80.65 Low with volume of 152,900. Newer Older