$20−3.66% vs prior closeFinazon · prior-day close, indicative (IEX-derived, not the official close)
Price · Chart
This price chart is drawn by TradingView, from their own data, in an embed loaded from their servers. We hold too few licensed daily closes of our own for ZLAB to draw a line in its place.
SEC Form 4 · last 90 days · newest reported trade 19 Aug 2026
Open-market buys0
Open-market sells3
Net sold$235K
Non-trade filings4
DateInsiderTypeSharesValue
19 Aug 2026Chen YajingChief Financial OfficerSell260$7K
12 Aug 2026Lis WilliamDirectorSell8,506$213K
11 Aug 2026Chen YajingChief Financial OfficerSell619$15K
Compensation mechanics
Share grants, option exercises, tax withholding and transfers. They reach the same Form 4 as a trade, but they are not the insider buying or selling on the open market, so no purchase or sale value applies to them.
DateInsiderTypeSharesValue
01 Oct 2026Chen YajingChief Financial OfficerOption exercise920
01 Oct 2026Chen YajingChief Financial OfficerTax withheld315$8K
14 Aug 2026Chen YajingChief Financial OfficerOption exercise1,250
14 Aug 2026Chen YajingChief Financial OfficerTax withheld427$11K
4 of the 45 institutional funds we track reported a ZLAB position for the quarter ended 30 Jun 2026 — a combined $54.6M; the latest of those filings landed 02 Sep 2026.