Gp Llc Nbge, 10% Owner at Proto Labs Inc (PRLB), sold 1,417,500 shares at $31.00 ($43.9M) on 2012-11-21, disclosed to the SEC on 2012-11-21.
Open-market sale of $43.9M PRLB by 10% Owner. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Negative factors outweigh the positive ones.