Zhengbin Yao, Vice President of Research at TANOX INC (TNOX), sold 18,000 shares at $19.63 ($353K) on 2006-11-20, disclosed to the SEC on 2006-11-22.
Open-market sale of $353k TNOX by Vice President of Research. 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.