NASDAQ:ZLAB

Zai Lab Stock Insider Trading

Healthcare > Biotechnology

Buy ZLAB

*Your capital is at risk

$17.17

+0.0200 (+0.117%)

At Close: Jun 03, 2026

Zai Lab Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -59.93. In total, the insiders bought 2.81M and sold 815.11K ZLAB shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-59.93
● Buy	2.81M shares
● Sell	815.11K shares
68% Buy Activity Negligible or No Correlation
Buy Signal Low Confidence Mar 11, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -59.93. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Apr 02, 2026 Buy	American Depositary Shares M-Exempt	Chen Yajing Chief Financial Officer	C-Suite Officer	2 500 Value: $51.0K
Apr 02, 2026 Sell	American Depositary Shares S-Sale	Amado Rafael See Remarks	Officer	9 910 Value: $202.1K
Apr 02, 2026 Buy	Restricted Share Units M-Exempt	Du Ying Chairperson & CEO	CEO / President	6 750 Value: $137.8K
Apr 02, 2026 Buy	Restricted Share Units M-Exempt	Edmondson Frazor Titus Iii Chief Legal Officer	Officer	5 031 Value: $102.7K
Apr 02, 2026 Sell	American Depositary Shares S-Sale	Smiley Joshua L See Remarks	Officer	9 614 Value: $196.0K
Apr 02, 2026 Buy	American Depositary Shares M-Exempt	Smiley Joshua L See Remarks	Officer	7 145 Value: $145.8K
Apr 02, 2026 Buy	Restricted Share Units M-Exempt	Smiley Joshua L See Remarks	Officer	7 145 Value: $145.8K
Apr 02, 2026 Buy	American Depositary Shares M-Exempt	Edmondson Frazor Titus Iii Chief Legal Officer	Officer	5 031 Value: $102.7K
Apr 02, 2026 Sell	American Depositary Shares S-Sale	Edmondson Frazor Titus Iii Chief Legal Officer	Officer	4 194 Value: $85.5K
Apr 02, 2026 Buy	American Depositary Shares M-Exempt	Du Ying Chairperson & CEO	CEO / President	6 750 Value: $137.8K
Apr 02, 2026 Sell	American Depositary Shares S-Sale	Du Ying Chairperson & CEO	CEO / President	5 576 Value: $113.7K
Apr 02, 2026 Buy	Restricted Share Units M-Exempt	Chen Yajing Chief Financial Officer	C-Suite Officer	2 500 Value: $51.0K
Apr 02, 2026 Buy	American Depositary Shares M-Exempt	Amado Rafael See Remarks	Officer	5 391 Value: $110.0K
Apr 01, 2026 Buy	Restricted Share Units M-Exempt	Amado Rafael See Remarks	Officer	19 523 Value: $397.1K
Apr 01, 2026 Buy	American Depositary Shares M-Exempt	Chen Yajing Chief Financial Officer	C-Suite Officer	13 758 Value: $279.8K
Apr 01, 2026 Buy	Restricted Share Units M-Exempt	Du Ying Chairperson & CEO	CEO / President	3 400 Value: $69.2K
Apr 01, 2026 Buy	American Depositary Shares M-Exempt	Amado Rafael See Remarks	Officer	19 523 Value: $397.1K
Apr 01, 2026 Buy	Restricted Share Units M-Exempt	Du Ying Chairperson & CEO	CEO / President	10 800 Value: $219.7K
Apr 01, 2026 Buy	American Depositary Shares M-Exempt	Du Ying Chairperson & CEO	CEO / President	10 800 Value: $219.7K
Apr 01, 2026 Buy	Restricted Share Units M-Exempt	Edmondson Frazor Titus Iii Chief Legal Officer	Officer	2 671 Value: $54.3K
Apr 01, 2026 Buy	American Depositary Shares M-Exempt	Edmondson Frazor Titus Iii Chief Legal Officer	Officer	2 671 Value: $54.3K
Apr 01, 2026 Buy	American Depositary Shares M-Exempt	Edmondson Frazor Titus Iii Chief Legal Officer	Officer	830 Value: $16.9K
Apr 01, 2026 Buy	American Depositary Shares M-Exempt	Edmondson Frazor Titus Iii Chief Legal Officer	Officer	13 758 Value: $279.8K
Apr 01, 2026 Buy	American Depositary Shares M-Exempt	Smiley Joshua L See Remarks	Officer	32 062 Value: $652.1K
Apr 01, 2026 Buy	Restricted Share Units M-Exempt	Smiley Joshua L See Remarks	Officer	32 062 Value: $652.1K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks