Zai Lab ZLAB Insider Ownership

Updated Oct 11, 2026

Across the past 12 months, open-market trades by Zai Lab insiders totaled $65,804 in purchases (3.47K shares) and $11.12 million in sales (571.41K shares).

• Behind Zai Lab's open-market trades in the past 12 months were one insider buying and 6 insiders selling.
• Among Zai Lab's insiders, the largest open-market purchases in the past 12 months were by Richard Gaynor (Director), totaling $65,804 (3.47K shares), most recently on July 1, 2026.
• Conversely, Ying Du (Chairperson & CEO) was ZLAB's largest open-market seller in the past 12 months, with $8.58 million of sales (440.87K shares); the latest was on June 30, 2026.
• The newest open-market trade among Zai Lab insiders came on August 19, 2026, when Yajing Chen (Chief Financial Officer) made a sale of 260 shares for $7,020.
• Away from the open market, ZLAB insiders received 22.37K shares in stock awards, acquired 1.2Mn shares through option exercises and conversions, gave up 246.54K shares to cover taxes or exercise prices and gave away 411.08K shares as gifts over the last 12 months.
• According to Business Quant data, insiders at Zai Lab reported 2.99Mn shares in total in their latest Form 4 filings.
• None of the 2.99Mn shares held by Zai Lab insiders is held through trusts, partnerships or family members; all are direct holdings.
• ZLAB's insider total is spread across 14 insiders who have filed a Form 4 in the past two years.
• Zai Lab's three largest insider shareholders, based on their latest Form 4 filings, are Ying Du (Chairperson & CEO, 1.22Mn shares), Peter Wirth (Director, 766.74K shares) and John D. Diekman (Director, 189.75K shares).
• Ying Du alone accounts for 40.86% of the shares held by Zai Lab insiders.
• In their Q2 2026 13F filings, institutions reported holding 38.40% of Zai Lab's outstanding shares.
• In the last 12 months, 52 Form 4 filings with transactions in ZLAB stock came from 14 insiders.
• Insider figures for ZLAB include Form 4 filings through October 5, 2026.