Zhengbin Yao serves as Executive at TANOX INC, where they oversee executive responsibilities. Since joining the company, Zhengbin Yao has executed 6 insider transactions totaling $353.3K, demonstrating a bearish approach to their equity position. Their most recent transaction on Feb 2, 2026 involved receiving (via award) 550,000 shares valued at $0.
Zhengbin Yao currently holds 550,000 shares of TANOX INC (TNOX), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Zhengbin Yao has been a net seller of TNOX stock. They have purchased $0 and sold $353.3K worth of shares.
Zhengbin Yao's most recent insider trade was on Feb 2, 2026, when they sold 550,000 shares at $0.00 per share.
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| $53.00 |
| Discretionary |
| Mar 13, 2021 | VIE | $10.6M | Disposition | 200,000 | $53.00 | Discretionary |
| Nov 20, 2006 | TNOX | $353.3K | Sale | 18,000 | $19.63 | Discretionary |
| Nov 20, 2006 | TNOX | $148.1K | Option Exercise | 15,000 | $9.87 | Discretionary |
| Nov 20, 2006 | TNOX | $24.2K | Option Exercise | 3,000 | $8.06 | Discretionary |