ZLAB Zai Lab Limited
$24.14
Zai Lab Limited (ZLAB) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
Insider signal
In line
Selling ran in line with ZLAB's own trailing one-year pace, with 82% of sale value under a prearranged plan.
Cluster activity
0 buyers in the last 30 days
1 buyer in the last 90 days
4 sellers in the last 90 days
Insiders buying
1
2 transactions
Insiders selling
6
41 transactions
Purchases
$65.8K
3,467 shares
Sales
$11.1M
571,862 shares
Net activity
-$11.1M
purchases less sales
How much of that selling was preplanned? 82% planned / 18% discretionary
10b5-1 plan sales
$9.2M
19 transactions · 468,490 shares
Discretionary sales
$2.0M
22 transactions · 103,372 shares
Largest single sale: $1.0M.
Where they traded
Buy
Sell
Dot area is proportional to transaction value.
Last open-market purchase: July 1, 2026 , by GAYNOR RICHARD .
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Chen Yajing | Chief Financial Officer | Sell 10b5-1 | 260 | $27.00 | $7.0K | 35,635 −0.7% of holding | |
| Lis William | Director | Sell 10b5-1 | 8,506 | $25.00 | $212.7K | 41,931 −16.9% of holding | |
| Chen Yajing | Chief Financial Officer | Sell 10b5-1 | 619 | $25.00 | $15.5K | 35,072 −1.7% of holding | |
| GAYNOR RICHARD | Director | Buy 10b5-1 | 1,736 | $19.05 | $33.1K | 80,737 | |
| Du Ying | Chairperson & CEO | Sell | 7,026 | $18.53 | $130.2K | 1,203,784 −0.6% of holding | |
| Du Ying | Chairperson & CEO | Sell | 24,543 | $17.46 | $428.5K | 1,192,840 −2% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell | 4,103 | $17.46 | $71.6K | 30,346 −11.9% of holding | |
| Chen Yajing | Chief Financial Officer | Sell | 2,264 | $17.46 | $39.5K | 35,691 −6% of holding | |
| Lis William | Director | Sell 10b5-1 | 7,040 | $18.09 | $127.4K | 50,437 −12.2% of holding | |
| Du Ying | Chairperson & CEO | Sell 10b5-1 | 50,000 | $19.00 | $949.8K | 1,122,626 −4.3% of holding | |
| Du Ying | Chairperson & CEO | Sell 10b5-1 | 50,000 | $20.74 | $1.0M | 1,122,626 −4.3% of holding | |
| Du Ying | Chairperson & CEO | Sell 10b5-1 | 50,000 | $20.09 | $1.0M | 1,122,626 −4.3% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell 10b5-1 | 3,517 | $20.19 | $71.0K | 19,849 −15.1% of holding | |
| Du Ying 2 fills | Chairperson & CEO | Sell 10b5-1 | 50,000 | $19.97 | $998.5K | 1,156,395 −4.1% of holding | |
| Smiley Joshua L | See Remarks | Sell | 3,017 | $20.45 | $61.7K | 117,602 −2.5% of holding | |
| Amado Rafael | See Remarks | Sell | 2,739 | $20.45 | $56.0K | 57,022 −4.6% of holding | |
| Du Ying | Chairperson & CEO | Sell | 2,653 | $20.45 | $54.2K | 1,122,626 −0.2% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell | 1,224 | $20.45 | $25.0K | 23,366 −5% of holding | |
| Chen Yajing | Chief Financial Officer | Sell | 853 | $20.45 | $17.4K | 31,705 −2.6% of holding | |
| Amado Rafael | See Remarks | Sell | 9,910 | $20.39 | $202.1K | 59,761 −14.2% of holding | |
| Smiley Joshua L | See Remarks | Sell | 9,614 | $20.39 | $196.0K | 120,619 −7.4% of holding | |
| Du Ying | Chairperson & CEO | Sell | 5,576 | $20.39 | $113.7K | 1,125,279 −0.5% of holding | |
| Chen Yajing | Chief Financial Officer | Sell | 5,199 | $20.39 | $106.0K | 32,558 −13.8% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell | 4,194 | $20.39 | $85.5K | 24,590 −14.6% of holding | |
| GAYNOR RICHARD | Director | Buy 10b5-1 | 1,731 | $18.91 | $32.7K | 56,630 | |
| Amado Rafael | See Remarks | Sell | 2,957 | $18.63 | $55.1K | 44,757 −6.2% of holding | |
| Smiley Joshua L | See Remarks | Sell | 1,966 | $18.63 | $36.6K | 91,026 −2.1% of holding | |
| Chen Yajing | Chief Financial Officer | Sell | 1,703 | $18.63 | $31.7K | 19,999 −7.8% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell | 1,281 | $18.63 | $23.9K | 6,494 −16.5% of holding | |
| Du Ying | Chairperson & CEO | Sell | 1,067 | $19.08 | $20.4K | 1,109,905 −0.1% of holding | |
| Du Ying | Chairperson & CEO | Sell 10b5-1 | 50,000 | $19.03 | $951.5K | 964,161 −4.9% of holding | |
| Du Ying | Chairperson & CEO | Sell 10b5-1 | 50,000 | $19.42 | $970.9K | 964,161 −4.9% of holding | |
| Du Ying | Chairperson & CEO | Sell 10b5-1 | 50,000 | $19.22 | $961.1K | 964,161 −4.9% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell 10b5-1 | 15,569 | $19.06 | $296.7K | 3,517 −81.6% of holding | |
| Du Ying 2 fills | Chairperson & CEO | Sell 10b5-1 | 50,000 | $19.16 | $958.2K | 999,871 −4.8% of holding | |
| Amado Rafael | See Remarks | Sell 10b5-1 | 10,000 | $17.38 | $173.8K | 42,391 −19.1% of holding | |
| Amado Rafael | See Remarks | Sell | 10,787 | $17.43 | $188.0K | 52,391 −17.1% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell 10b5-1 | 8,651 | $17.14 | $148.3K | 19,086 −31.2% of holding | |
| Edmondson Frazor Titus III | Chief Legal Officer | Sell 10b5-1 | 14,328 | $19.78 | $283.4K | 27,737 −34.1% of holding | |
| Chen Yajing | Chief Financial Officer | Sell | 240 | $26.83 | $6.4K | 17,444 −1.4% of holding | |
| Chen Yajing | Chief Financial Officer | Sell | 456 | $34.25 | $15.6K | 17,184 −2.6% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.