Edward E. Bolton, Vice President, Culture at Proto Labs Inc (PRLB), sold 905 shares at $54.80 ($50K) on 2013-05-09, disclosed to the SEC on 2013-05-13.
Open-market sale of $50k PRLB by Vice President, Culture. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Something here stands out, but not much.