William Lis insider trades: Zai Lab (ZLAB) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where William reports to the SEC
Open-market buys and sales
27 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 12, 2026 | ZLAB | ↓ Sell | 8,506 | $25.00 | $213K | Direct | Aug 13, 2026 (1d) |
| Jun 22, 2026 | ZLAB | ↓ Sell | 7,040 | $18.09 | $127K | Direct | Jun 24, 2026 (2d) |
| Jun 20, 2025 | ZLAB | ↓ Sell | 13,814 | $35.67 | $493K | Direct | Jun 23, 2025 (3d) |
| Feb 28, 2025 | ZLAB | ↓ Sell | 15,000 | $32.98 | $495K | Direct | Mar 4, 2025 (4d) |
| Jul 1, 2024 | ZLAB | ↓ Sell | 10,397 | $17.32 | $180K | Direct | Jul 3, 2024 (2d) |
| Oct 13, 2023 | JSPR | ↓ Sell | 7,965 | $0.85 | $7K | Direct | Oct 13, 2023 (0d) |
| Apr 13, 2023 | JSPR | ↓ Sell | 8,500 | $1.44 | $12K | Direct | Apr 14, 2023 (1d) |
| Mar 3, 2023 | ZLAB | ↓ Sell | 5,434 | $38.31 | $208K | Direct | Mar 7, 2023 (4d) |
| Jun 27, 2022 | JSPR | ↓ Sell10b5-1 | 49,486 | $2.05 | $101K | Direct | Jun 28, 2022 (1d) |
| Jan 20, 2022 | ZLAB | ↓ Sell | 1,926 | $53.40 | $103K | Direct | Jan 21, 2022 (1d) |
| Jun 6, 2018 | PTLA | ↓ Sell10b5-1 | 5,113 | $45.21 | $231K | Direct | Jun 8, 2018 (2d) |
| Jun 28, 2017 | PTLA | ↓ Sell | 14,150 | $55.35 | $783K | Direct | Jun 29, 2017 (1d) |
| Jun 27, 2017 | PTLA | ↓ Sell | 255,149 | $55.44 | $14.1M | Direct | Jun 29, 2017 (2d) |
| Apr 11, 2017 | PTLA | ↓ Sell | 6,750 | $36.06 | $243K | Direct | Apr 11, 2017 (0d) |
| May 2, 2016 | PTLA | ↓ Sell10b5-1 | 5,675 | $23.86 | $135K | Direct | May 3, 2016 (1d) |
| Jul 15, 2015 | PTLA | ↓ Sell | 50,000 | $50.00 | $2.5M | Direct | Jul 15, 2015 (0d) |
| Jul 2, 2015 | PTLA | ↓ Sell | 15,000 | $45.60 | $684K | Direct | Jul 2, 2015 (0d) |
| Jul 1, 2015 | PTLA | ↓ Sell | 30,000 | $45.01 | $1.4M | Direct | Jul 1, 2015 (0d) |
| Apr 30, 2015 | PTLA | ↓ Sell | 45,000 | $35.60 | $1.6M | Direct | May 1, 2015 (1d) |
| Jan 20, 2015 | PTLA | ↓ Sell | 20,000 | $27.32 | $546K | Direct | Jan 20, 2015 (0d) |
| Jan 16, 2015 | PTLA | ↓ Sell | 20,000 | $26.94 | $539K | Direct | Jan 16, 2015 (0d) |
| Nov 20, 2014 | PTLA | ↓ Sell | 40,000 | $26.95 | $1.1M | Direct | Nov 20, 2014 (0d) |
| Nov 17, 2014 | PTLA | ↓ Sell | 30,000 | $26.69 | $801K | Direct | Nov 17, 2014 (0d) |
| Jul 3, 2014 | PTLA | ↓ Sell | 30,000 | $30.41 | $912K | Direct | Jul 3, 2014 (0d) |
| Jun 30, 2014 | PTLA | ↓ Sell | 10,000 | $29.23 | $292K | Direct | Jul 1, 2014 (1d) |
| May 27, 2014 | PTLA | ↓ Sell10b5-1 | 30,000 | $20.83 | $625K | Direct | May 27, 2014 (0d) |
| May 21, 2014 | PTLA | ↓ Sell10b5-1 | 10,000 | $19.87 | $199K | Direct | May 21, 2014 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ZLAB insiders
Open-market trades in the last 12 months
About William Lis's insider trades
William Lis is an insider at Zai Lab (ZLAB). Since May 21, 2014, William has reported no open-market purchases and 27 sales worth $28.6M on SEC Form 4. In the last 12 months: 2 sales ($340K).
5 sales (5% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (19 filings), option exercises (14 filings), shares withheld for taxes (6 filings), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every ZLAB insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.