ZLAB
insider transactionsZai Lab Ltd — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 90d
-248.5K
0 buy · 248.5K sell
Net value · 90d
-$5.0M
$0 in · $5.0M out
Sentiment · 90d
Net selling
0% buying · 100% selling
Open-market trades · 90d
16
0 buy · 248.5K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Other·G
Ying Du KEY
Chairperson & CEO
$0
53.9K sh
Own -4%
-
Other·G
Ying Du KEY
Chairperson & CEO
$0
34.0K sh
Own -3%
-
Other·G
Ying Du KEY
Chairperson & CEO
$0
19.9K sh
Own -2%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$0
261.1K sh
Own New
-
Other·F
Ying Du KEY
Chairperson & CEO · 10b5-1
$2.2M
117.4K sh · $18.75
Own -8%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$454.3K
261.1K sh · $1.74
Own +23%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$0
50.0K sh
Own +24%
-
Sell·S
Ying Du KEY
Chairperson & CEO · 10b5-1
$949.8K
50.0K sh · $19.00
Own -4%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$87.0K
50.0K sh · $1.74
Own +4%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$0
50.0K sh
Own +19%
-
Sell·S
Ying Du KEY
Chairperson & CEO · 10b5-1
$1.0M
50.0K sh · $20.74
Own -4%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$87.0K
50.0K sh · $1.74
Own +4%
-
Sell·S
Chief Legal Officer · 10b5-1
$71.0K
3.5K sh · $20.19
Own -15%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$0
50.0K sh
Own +16%
-
Sell·S
Ying Du KEY
Chairperson & CEO · 10b5-1
$1.0M
50.0K sh · $20.09
Own -4%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$87.0K
50.0K sh · $1.74
Own +4%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$0
50.0K sh
Own +14%
-
Sell·S
Ying Du KEY
Chairperson & CEO · 10b5-1
$682.9K
33.8K sh · $20.22
Own -3%
-
Sell·S
Ying Du KEY
Chairperson & CEO · 10b5-1
$315.6K
16.2K sh · $19.44
Own -1%
-
Exercise·M
Ying Du KEY
Chairperson & CEO · 10b5-1
$87.0K
50.0K sh · $1.74
Own +4%
-
Grant·A
Operating Partner
$0
59.3K sh
Own New
-
Grant·A
Operating Partner
$0
136.8K sh
Own New
-
Sell·S
Joshua L Smiley KEY
President and Chief Operating…
$61.7K
3.0K sh · $20.45
Own -3%
-
Sell·S
Chief Legal Officer
$25.0K
1.2K sh · $20.45
Own -5%
-
Sell·S
Ying Du KEY
Chairperson & CEO
$54.2K
2.7K sh · $20.45
Own -0%
-
Sell·S
Yajing Chen KEY
Chief Financial Officer
$17.4K
853 sh · $20.45
Own -3%
-
Sell·S
Rafael Amado KEY
President, Head of Global Onc…
$56.0K
2.7K sh · $20.45
Own -5%
-
Exercise·M
Joshua L Smiley KEY
President and Chief Operating…
$0
7.1K sh
Own New
-
Sell·S
Joshua L Smiley KEY
President and Chief Operating…
$196.0K
9.6K sh · $20.39
Own -7%
-
Exercise·M
Joshua L Smiley KEY
President and Chief Operating…
—
7.1K sh
Own +6%
-
Exercise·M
Chief Legal Officer
$0
5.0K sh
Own +503100%
-
Sell·S
Chief Legal Officer
$85.5K
4.2K sh · $20.39
Own -15%
-
Exercise·M
Chief Legal Officer
—
5.0K sh
Own +21%
-
Exercise·M
Ying Du KEY
Chairperson & CEO
$0
6.8K sh
Own +100%
-
Sell·S
Ying Du KEY
Chairperson & CEO
$113.7K
5.6K sh · $20.39
Own -0%
-
Exercise·M
Ying Du KEY
Chairperson & CEO
—
6.8K sh
Own +1%
-
Exercise·M
Yajing Chen KEY
Chief Financial Officer
$0
2.5K sh
Own New
-
Sell·S
Yajing Chen KEY
Chief Financial Officer
$106.0K
5.2K sh · $20.39
Own -14%
-
Exercise·M
Yajing Chen KEY
Chief Financial Officer
—
2.5K sh
Own +7%
-
Exercise·M
Rafael Amado KEY
President, Head of Global Onc…
$0
5.4K sh
Own New
-
Sell·S
Rafael Amado KEY
President, Head of Global Onc…
$202.1K
9.9K sh · $20.39
Own -14%
-
Exercise·M
Rafael Amado KEY
President, Head of Global Onc…
—
5.4K sh
Own +8%
-
Exercise·M
Joshua L Smiley KEY
President and Chief Operating…
$0
32.1K sh
Own +100%
-
Exercise·M
Joshua L Smiley KEY
President and Chief Operating…
—
32.1K sh
Own +35%
-
Exercise·M
Chief Legal Officer
$0
13.8K sh
Own +100%
-
Exercise·M
Chief Legal Officer
$0
830 sh
Own New
-
Exercise·M
Chief Legal Officer
$0
2.7K sh
Own New
-
Exercise·M
Chief Legal Officer
—
13.8K sh
Own +138%
-
Exercise·M
Chief Legal Officer
—
830 sh
Own +9%
-
Exercise·M
Chief Legal Officer
—
2.7K sh
Own +41%
-
Exercise·M
Ying Du KEY
Chairperson & CEO
$0
3.4K sh
Own New
-
Exercise·M
Ying Du KEY
Chairperson & CEO
$0
10.8K sh
Own New
-
Exercise·M
Ying Du KEY
Chairperson & CEO
—
3.4K sh
Own +0%
-
Exercise·M
Ying Du KEY
Chairperson & CEO
—
10.8K sh
Own +1%
-
Exercise·M
Yajing Chen KEY
Chief Financial Officer
$0
13.8K sh
Own +100%
-
Exercise·M
Yajing Chen KEY
Chief Financial Officer
$0
1.5K sh
Own New
-
Exercise·M
Yajing Chen KEY
Chief Financial Officer
—
13.8K sh
Own +64%
-
Exercise·M
Yajing Chen KEY
Chief Financial Officer
—
1.5K sh
Own +8%
-
Exercise·M
Rafael Amado KEY
President, Head of Global Onc…
$0
19.5K sh
Own +100%
-
Exercise·M
Rafael Amado KEY
President, Head of Global Onc…
—
19.5K sh
Own +44%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 27, 2026 | Ying Du KEY | Other G | 53.9K | $0 |
| May 27, 2026 | Ying Du KEY | Other G | 34.0K | $0 |
| May 26, 2026 | Ying Du KEY | Other G | 19.9K | $0 |
| May 19, 2026 | Ying Du KEY 10b5-1 | Exercise M | 261.1K | $0 |
| May 19, 2026 | Ying Du KEY 10b5-1 | Other F | 117.4K | $2.2M |
| May 19, 2026 | Ying Du KEY 10b5-1 | Exercise M | 261.1K | $454.3K |
| May 18, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $0 |
| May 18, 2026 | Ying Du KEY 10b5-1 | Sell S | 50.0K | $949.8K |
| May 18, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $87.0K |
| May 15, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $0 |
| May 15, 2026 | Ying Du KEY 10b5-1 | Sell S | 50.0K | $1.0M |
| May 15, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $87.0K |
| May 14, 2026 | Frazor Titus Edmondson III 10b5-1 | Sell S | 3.5K | $71.0K |
| May 14, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $0 |
| May 14, 2026 | Ying Du KEY 10b5-1 | Sell S | 50.0K | $1.0M |
| May 14, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $87.0K |
| May 13, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $0 |
| May 13, 2026 | Ying Du KEY 10b5-1 | Sell S | 33.8K | $682.9K |
| May 13, 2026 | Ying Du KEY 10b5-1 | Sell S | 16.2K | $315.6K |
| May 13, 2026 | Ying Du KEY 10b5-1 | Exercise M | 50.0K | $87.0K |
| May 11, 2026 | Yizhe Wang | Grant A | 59.3K | $0 |
| May 11, 2026 | Yizhe Wang | Grant A | 136.8K | $0 |
| Apr 6, 2026 | Joshua L Smiley KEY | Sell S | 3.0K | $61.7K |
| Apr 6, 2026 | Frazor Titus Edmondson III | Sell S | 1.2K | $25.0K |
| Apr 6, 2026 | Ying Du KEY | Sell S | 2.7K | $54.2K |
| Apr 6, 2026 | Yajing Chen KEY | Sell S | 853 | $17.4K |
| Apr 6, 2026 | Rafael Amado KEY | Sell S | 2.7K | $56.0K |
| Apr 2, 2026 | Joshua L Smiley KEY | Exercise M | 7.1K | $0 |
| Apr 2, 2026 | Joshua L Smiley KEY | Sell S | 9.6K | $196.0K |
| Apr 2, 2026 | Joshua L Smiley KEY | Exercise M | 7.1K | — |
| Apr 2, 2026 | Frazor Titus Edmondson III | Exercise M | 5.0K | $0 |
| Apr 2, 2026 | Frazor Titus Edmondson III | Sell S | 4.2K | $85.5K |
| Apr 2, 2026 | Frazor Titus Edmondson III | Exercise M | 5.0K | — |
| Apr 2, 2026 | Ying Du KEY | Exercise M | 6.8K | $0 |
| Apr 2, 2026 | Ying Du KEY | Sell S | 5.6K | $113.7K |
| Apr 2, 2026 | Ying Du KEY | Exercise M | 6.8K | — |
| Apr 2, 2026 | Yajing Chen KEY | Exercise M | 2.5K | $0 |
| Apr 2, 2026 | Yajing Chen KEY | Sell S | 5.2K | $106.0K |
| Apr 2, 2026 | Yajing Chen KEY | Exercise M | 2.5K | — |
| Apr 2, 2026 | Rafael Amado KEY | Exercise M | 5.4K | $0 |
| Apr 2, 2026 | Rafael Amado KEY | Sell S | 9.9K | $202.1K |
| Apr 2, 2026 | Rafael Amado KEY | Exercise M | 5.4K | — |
| Apr 1, 2026 | Joshua L Smiley KEY | Exercise M | 32.1K | $0 |
| Apr 1, 2026 | Joshua L Smiley KEY | Exercise M | 32.1K | — |
| Apr 1, 2026 | Frazor Titus Edmondson III | Exercise M | 13.8K | $0 |
| Apr 1, 2026 | Frazor Titus Edmondson III | Exercise M | 830 | $0 |
| Apr 1, 2026 | Frazor Titus Edmondson III | Exercise M | 2.7K | $0 |
| Apr 1, 2026 | Frazor Titus Edmondson III | Exercise M | 13.8K | — |
| Apr 1, 2026 | Frazor Titus Edmondson III | Exercise M | 830 | — |
| Apr 1, 2026 | Frazor Titus Edmondson III | Exercise M | 2.7K | — |
| Apr 1, 2026 | Ying Du KEY | Exercise M | 3.4K | $0 |
| Apr 1, 2026 | Ying Du KEY | Exercise M | 10.8K | $0 |
| Apr 1, 2026 | Ying Du KEY | Exercise M | 3.4K | — |
| Apr 1, 2026 | Ying Du KEY | Exercise M | 10.8K | — |
| Apr 1, 2026 | Yajing Chen KEY | Exercise M | 13.8K | $0 |
| Apr 1, 2026 | Yajing Chen KEY | Exercise M | 1.5K | $0 |
| Apr 1, 2026 | Yajing Chen KEY | Exercise M | 13.8K | — |
| Apr 1, 2026 | Yajing Chen KEY | Exercise M | 1.5K | — |
| Apr 1, 2026 | Rafael Amado KEY | Exercise M | 19.5K | $0 |
| Apr 1, 2026 | Rafael Amado KEY | Exercise M | 19.5K | — |
About ZLAB insider trading
This page tracks insider transactions for Zai Lab Ltd (ZLAB) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.