Edward E. Bolton, Vice President, Culture at Proto Labs Inc (PRLB), sold 10,710 shares at $46.13 ($494K) on 2013-02-27, disclosed to the SEC on 2013-03-01.
Open-market sale of $494k 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.