Du Ying 4

What Happened

• Du Ying, Chairperson & CEO of Zai Lab (ZLAB), exercised stock options to acquire 100,000 American Depositary Shares (ADSs) at $1.74 each (total cost $174,000) and sold 100,000 ADSs in open-market transactions for approximately $1.92 million. The exercises and sales occurred on March 4–5, 2026; the Form 4 was filed March 6, 2026.
• The sales were executed under a pre-existing Rule 10b5-1 trading plan. Sales proceeded at weighted-average prices reported in the filing (see Key Details). These transactions are routine insider selling rather than a fresh open-market purchase.

Key Details

• Transaction dates: March 4–5, 2026; Form 4 filed March 6, 2026 (timely).
• Exercises: 2 × 50,000 ADSs acquired @ $1.74 each = $87,000 each; total acquired 100,000 ADSs for $174,000.
• Sales: total disposed 100,000 ADSs for ~ $1,919,208 (breakdowns per footnotes: weighted averages $18.7769, $19.3176, $19.2211 across reported lots; price ranges shown in filing).
• Footnotes: F1 — each ADS = 10 ordinary shares (reporting here is in ADSs). F2 — sales were pursuant to a 10b5-1 plan adopted Nov 11, 2025. F6 — option vested on an established schedule (vesting began Aug 25, 2017).
• The filing shows related derivative entries reported at $0, which reflect the exercise/settlement reporting for the options (as presented in the Form 4).
• Shares owned after the transactions are not specified in the provided summary of the filing.

Context

• This was an exercise of vested options followed by open-market sales (common for executives converting options to cash). Because the sales were made pursuant to a 10b5-1 plan, they were pre-scheduled trades and not necessarily contemporaneous discretionary sales by the insider.
• Note for investors: purchases generally carry more informational weight than scheduled sales; these entries document routine option monetization under an established plan.