ZLAB Zai Lab Limited

NASDAQ
$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.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with ZLAB's own trailing one-year pace, with 74% 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
24 transactions
Purchases
$65.8K
3,467 shares
Sales
$6.0M
302,857 shares
Net activity
-$5.9M
purchases less sales

How much of that selling was preplanned? 74% planned / 26% discretionary

10b5-1 plan sales $4.4M 10 transactions · 219,942 shares
Discretionary sales $1.6M 14 transactions · 82,915 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

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.