investing-statsSEC Form 4 insider transactions

ZLAB · Zai Lab Ltd

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Pharmaceutical Preparations · Listed on Nasdaq

Open-market insider flow over 30d · 90d · 180d · 365d · filter in table · CSV · JSON

Open-market trades9
Distinct insiders5
Bought$33.1K
Sold$1.03M
Net flow$-999.4K

Recent filings

How to read this

Filed
Date the Form 4 was filed with the SEC. Insiders must file within 2 business days of the trade.
Ticker
The issuer's stock symbol. Select it to open that company's insider-activity page.
Issuer
The company whose shares were traded.
Sector
The issuer's industry (SEC SIC classification). Select a value to filter to that sector.
Insider
The reporting person: an officer, director, or 10% owner. Select a name to see all of their trades.
Role
The insider's relationship to the company: director, officer, or 10% owner.
Code
SEC transaction code describing the kind of transaction. Full official definitions are under “Transaction codes” below. A dot marks an open-market trade (P/S), the highest-conviction signal.
Side
Direction of the trade, from the filing's Acquired (A) ▲ / Disposed of (D) ▼ field: a buy or a sell.
10b5-1
Trade made under a pre-arranged Rule 10b5-1 plan: scheduled in advance, not a discretionary decision (generally lower signal).
Shares
Number of shares in this transaction.
Price
Reported price per share. Blank for grants, gifts, and other trades with no stated price.
Value
Transaction value = shares × price. Left blank for grants, option exercises, gifts, and conversions, which have no cash price (see Own Δ for their impact).
Owned after
Form 4 column “Amount of Securities Beneficially Owned Following Reported Transaction(s)”: shares the insider held (directly or indirectly) immediately after this trade.
Own Δ
How much this trade changed the insider's own holding versus what they held just before it (not a share of the company). +45% grew it by 45%, 2.0× more than doubled it, −100% sold the entire stake, “new” built a position from nothing.
Co. Δ
Change in the insider's stake as a share of the whole company from this trade (transaction shares ÷ shares outstanding). The “(now …)” figure is their resulting total stake. Based on the latest reported shares outstanding; blank when unavailable.
D/I
Form 4 column “Ownership Form: Direct (D) or Indirect (I)”. Indirect holdings (for example, through a trust, fund, or family member) are detailed in the filing's “Nature of Indirect Beneficial Ownership.”
Lag
Days from the trade date to the filing date (Form 4 is due within 2 business days).

Transaction codes

Verbatim from the SEC's General Instructions for Forms 3, 4 and 5.

P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award or other acquisition pursuant to Rule 16b-3(d)
D
Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e)
F
Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3
M
Exercise or conversion of derivative security exempted pursuant to Rule 16b-3
G
Bona fide gift
C
Conversion of derivative security
X
Exercise of in-the-money or at-the-money derivative security
J
Other acquisition or disposition (describe transaction)
Recent Form 4 filings for ZLAB
FiledDate the Form 4 was filed with the SEC (due within 2 business days of the trade).InsiderRoleCodeSEC transaction code describing the kind of transaction. See “How to read this” above for the official SEC definition of each code. The dot marks an open-market trade (P/S).SideDirection of the trade: a buy (acquired ▲) or a sell (disposed ▼).SharesNumber of shares in this transaction.PriceReported price per share. Blank for trades with no stated price.ValueTransaction value = shares × price. Left blank for grants, option exercises, gifts, and conversions, which have no cash price (see Own Δ).Owned afterShares the insider held (directly or indirectly) immediately after this trade.Own ΔHow much this trade changed the insider's own holding versus what they held just before it (not a share of the company). +45% grew it by 45%, 2.0× more than doubled it, −100% sold the entire stake, “new” built a position from nothing.Co. ΔChange in the insider's stake as a share of the whole company from this trade (transaction shares ÷ shares outstanding). The “(now …)” figure is their resulting total stake in the company. Based on the latest reported shares outstanding; blank when unavailable.Link to SEC filing
2026-08-21Chen YajingOfficer (Chief Financial Officer)S sell10b5-12600$27.00$7.0K35,635−0.7%−<0.01% (now 0.04%)filing
2026-08-18Chen YajingOfficer (Chief Financial Officer)M sell1,250 1,250 American Depositary Shares1,250filing
2026-08-18Chen YajingOfficer (Chief Financial Officer)F sell4270$25.90$11.1K35,895−1%−<0.01% (now 0.04%)filing
2026-08-18Chen YajingOfficer (Chief Financial Officer)M buy1,250036,322+4%+<0.01% (now 0.04%)filing
2026-08-13Lis WilliamDirectorS sell10b5-18,5060$25.00$212.7K41,931−17%−<0.01% (now 0.05%)filing
2026-08-13Chen YajingOfficer (Chief Financial Officer)S sell10b5-16190$25.00$15.5K35,072−2%−<0.01% (now 0.04%)filing
2026-07-06GAYNOR RICHARDDirectorP buy10b5-11,7360$19.05$33.1K80,737+2%+<0.01% (now 0.09%)filing
2026-07-06Du YingDirector, Officer (Chairperson & CEO)A buy80,393 80,393 American Depositary Shares80,393filing
2026-07-06Du YingDirector, Officer (Chairperson & CEO)M sell11,048 11,048 American Depositary Shares33,146filing
2026-07-06Du YingDirector, Officer (Chairperson & CEO)M sell18,000 18,000 American Depositary Shares36,000filing
2026-07-06Du YingDirector, Officer (Chairperson & CEO)F sell4,3480$19.12$83.1K1,221,401−0.4%−<0.01% (now 1.4%)filing
2026-07-06Du YingDirector, Officer (Chairperson & CEO)M buy11,04801,225,749+0.9%+0.01% (now 1.4%)filing
2026-07-06Du YingDirector, Officer (Chairperson & CEO)F sell7,0830$19.15$135.6K1,214,701−0.6%−<0.01% (now 1.4%)filing
2026-07-06Du YingDirector, Officer (Chairperson & CEO)M buy18,00001,221,784+1%+0.02% (now 1.4%)filing
2026-07-01Du YingDirector, Officer (Chairperson & CEO)M sell17,970 17,970 American Depositary Shares17,970filing
2026-07-01Du YingDirector, Officer (Chairperson & CEO)S sell7,0260$18.53$130.2K1,203,784−0.6%−<0.01% (now 1.4%)filing
2026-07-01Du YingDirector, Officer (Chairperson & CEO)M buy17,97001,210,810+2%+0.02% (now 1.4%)filing
2026-06-29Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M sell14,600 14,600 American Depositary Shares0filing
2026-06-29Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)S sell4,1030$17.46$71.6K30,346−12%−<0.01% (now 0.03%)filing
2026-06-29Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M buy14,600034,449+74%+0.02% (now 0.04%)filing
2026-06-29Du YingDirector, Officer (Chairperson & CEO)M sell58,800 58,800 American Depositary Shares0filing
2026-06-29Du YingDirector, Officer (Chairperson & CEO)S sell24,5430$17.46$428.5K1,192,840−2%−0.03% (now 1.3%)filing
2026-06-29Du YingDirector, Officer (Chairperson & CEO)M buy58,80001,217,383+5%+0.07% (now 1.4%)filing
2026-06-29Chen YajingOfficer (Chief Financial Officer)M sell6,250 6,250 American Depositary Shares0filing
2026-06-29Chen YajingOfficer (Chief Financial Officer)S sell2,2640$17.46$39.5K35,691−6%−<0.01% (now 0.04%)filing
2026-06-29Chen YajingOfficer (Chief Financial Officer)M buy6,250037,955+20%+<0.01% (now 0.04%)filing
2026-06-24Lis WilliamDirectorS sell10b5-17,0400$18.09$127.4K50,437−12%−<0.01% (now 0.06%)filing
2026-06-22WIRTH PETERDirectorA buy22,3710416,121+6%+0.03% (now 0.47%)filing
2026-06-22Vounatsos MichelDirectorA buy22,371072,787+44%+0.03% (now 0.08%)filing
2026-06-22Morrison Scott WDirectorA buy22,371056,904+65%+0.03% (now 0.06%)filing
2026-06-22MOULDER LEON O JRDirectorA buy22,371094,973+31%+0.03% (now 0.11%)filing
2026-06-22Lis WilliamDirectorA buy22,371057,477+64%+0.03% (now 0.06%)filing
2026-06-22Leung NisaDirectorA buy22,371096,297+30%+0.03% (now 0.11%)filing
2026-06-22GAYNOR RICHARDDirectorA buy22,371079,001+40%+0.03% (now 0.09%)filing
2026-06-22DIEKMAN JOHN DDirectorA buy22,3710122,140+22%+0.03% (now 0.14%)filing
2026-06-08Wang YizheOfficer (Operating Partner)A buy59,288 59,288 American Depositary Shares59,288filing
2026-06-08Wang YizheOfficer (Operating Partner)A buy136,819 136,819 American Depositary Shares136,819filing
2026-05-28Du YingDirector, Officer (Chairperson & CEO)G sell53,85001,158,583−4%−0.06% (now 1.3%)filing
2026-05-28Du YingDirector, Officer (Chairperson & CEO)G sell33,99301,212,433−3%−0.04% (now 1.4%)filing
2026-05-28Du YingDirector, Officer (Chairperson & CEO)G sell19,85701,246,426−2%−0.02% (now 1.4%)filing
2026-05-21Du YingDirector, Officer (Chairperson & CEO)M sell10b5-1261,092 261,092 American Depositary Shares0filing
2026-05-21Du YingDirector, Officer (Chairperson & CEO)F sell10b5-1117,4350$18.75$2.20M1,266,283−8%−0.13% (now 1.4%)filing
2026-05-21Du YingDirector, Officer (Chairperson & CEO)M buy10b5-1261,0920$1.74$454.3K1,383,718+23%+0.29% (now 1.6%)filing
2026-05-19Du YingDirector, Officer (Chairperson & CEO)M sell10b5-150,000 50,000 American Depositary Shares261,092filing
2026-05-19Du YingDirector, Officer (Chairperson & CEO)M sell10b5-150,000 50,000 American Depositary Shares311,092filing
2026-05-19Du YingDirector, Officer (Chairperson & CEO)S sell10b5-150,0000$19.00$949.8K1,122,626−4%−0.06% (now 1.3%)filing
2026-05-19Du YingDirector, Officer (Chairperson & CEO)M buy10b5-150,0000$1.74$87.0K1,172,626+4%+0.06% (now 1.3%)filing
2026-05-19Du YingDirector, Officer (Chairperson & CEO)S sell10b5-150,0000$20.74$1.04M1,122,626−4%−0.06% (now 1.3%)filing
2026-05-19Du YingDirector, Officer (Chairperson & CEO)M buy10b5-150,0000$1.74$87.0K1,172,626+4%+0.06% (now 1.3%)filing
2026-05-15Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)S sell10b5-13,5170$20.19$71.0K19,849−15%−<0.01% (now 0.02%)filing
2026-05-15Du YingDirector, Officer (Chairperson & CEO)M sell10b5-150,000 50,000 American Depositary Shares361,092filing
2026-05-15Du YingDirector, Officer (Chairperson & CEO)M sell10b5-150,000 50,000 American Depositary Shares411,092filing
2026-05-15Du YingDirector, Officer (Chairperson & CEO)S sell10b5-150,0000$20.09$1.00M1,122,626−4%−0.06% (now 1.3%)filing
2026-05-15Du YingDirector, Officer (Chairperson & CEO)M buy10b5-150,0000$1.74$87.0K1,172,626+4%+0.06% (now 1.3%)filing
2026-05-15Du YingDirector, Officer (Chairperson & CEO)S sell10b5-133,7690$20.22$682.9K1,122,626−3%−0.04% (now 1.3%)filing
2026-05-15Du YingDirector, Officer (Chairperson & CEO)S sell10b5-116,2310$19.44$315.6K1,156,395−1%−0.02% (now 1.3%)filing
2026-05-15Du YingDirector, Officer (Chairperson & CEO)M buy10b5-150,0000$1.74$87.0K1,172,626+4%+0.06% (now 1.3%)filing
2026-04-08Smiley Joshua LOfficer (See Remarks)S sell3,0170$20.45$61.7K117,602−3%−<0.01% (now 0.13%)filing
2026-04-08Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)S sell1,2240$20.45$25.0K23,366−5%−<0.01% (now 0.03%)filing
2026-04-08Du YingDirector, Officer (Chairperson & CEO)S sell2,6530$20.45$54.2K1,122,626−0.2%−<0.01% (now 1.3%)filing
2026-04-08Chen YajingOfficer (Chief Financial Officer)S sell8530$20.45$17.4K31,705−3%−<0.01% (now 0.04%)filing
2026-04-08Amado RafaelOfficer (See Remarks)S sell2,7390$20.45$56.0K57,022−5%−<0.01% (now 0.06%)filing
2026-04-03Smiley Joshua LOfficer (See Remarks)M sell7,145 7,145 American Depositary Shares7,145filing
2026-04-03Smiley Joshua LOfficer (See Remarks)M sell32,062 32,062 American Depositary Shares64,125filing
2026-04-03Smiley Joshua LOfficer (See Remarks)A buy17,887 17,887 American Depositary Shares17,887filing
2026-04-03Smiley Joshua LOfficer (See Remarks)S sell9,6140$20.39$196.0K120,619−7%−0.01% (now 0.14%)filing
2026-04-03Smiley Joshua LOfficer (See Remarks)M buy7,1450130,233+6%+<0.01% (now 0.15%)filing
2026-04-03Smiley Joshua LOfficer (See Remarks)M buy32,0620123,088+35%+0.04% (now 0.14%)filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M sell5,031 5,031 American Depositary Shares5,032filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M sell13,758 13,758 American Depositary Shares27,516filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M sell830 830 American Depositary Shares0filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M sell2,671 2,671 American Depositary Shares2,671filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)A buy11,924 11,924 American Depositary Shares11,924filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)S sell4,1940$20.39$85.5K24,590−15%−<0.01% (now 0.03%)filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M buy5,031028,784+21%+<0.01% (now 0.03%)filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M buy13,758023,7532.4×+0.02% (now 0.03%)filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M buy83009,995+9%+<0.01% (now 0.01%)filing
2026-04-03Edmondson Frazor Titus IIIOfficer (Chief Legal Officer)M buy2,67109,165+41%+<0.01% (now 0.01%)filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)M sell6,750 6,750 American Depositary Shares13,500filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)M sell3,400 3,400 American Depositary Shares0filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)M sell10,800 10,800 American Depositary Shares10,800filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)A buy25,579 25,579 American Depositary Shares25,579filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)S sell5,5760$20.39$113.7K1,125,279−0.5%−<0.01% (now 1.3%)filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)M buy6,75001,130,855+0.6%+<0.01% (now 1.3%)filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)M buy3,40001,124,105+0.3%+<0.01% (now 1.3%)filing
2026-04-03Du YingDirector, Officer (Chairperson & CEO)M buy10,80001,120,705+1.0%+0.01% (now 1.3%)filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)M sell2,500 2,500 American Depositary Shares2,500filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)M sell13,758 13,758 American Depositary Shares27,516filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)M sell1,500 1,500 American Depositary Shares1,500filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)A buy11,924 11,924 American Depositary Shares11,924filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)S sell5,1990$20.39$106.0K32,558−14%−<0.01% (now 0.04%)filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)M buy2,500037,757+7%+<0.01% (now 0.04%)filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)M buy13,758035,257+64%+0.02% (now 0.04%)filing
2026-04-03Chen YajingOfficer (Chief Financial Officer)M buy1,500021,499+8%+<0.01% (now 0.02%)filing
2026-04-03Amado RafaelOfficer (See Remarks)M sell5,391 5,391 American Depositary Shares5,391filing
2026-04-03Amado RafaelOfficer (See Remarks)M sell19,523 19,523 American Depositary Shares39,046filing
2026-04-03Amado RafaelOfficer (See Remarks)A buy14,905 14,905 American Depositary Shares14,905filing
2026-04-03Amado RafaelOfficer (See Remarks)S sell9,9100$20.39$202.1K59,761−14%−0.01% (now 0.07%)filing
2026-04-03Amado RafaelOfficer (See Remarks)M buy5,391069,671+8%+<0.01% (now 0.08%)filing
2026-04-03Amado RafaelOfficer (See Remarks)M buy19,523064,280+44%+0.02% (now 0.07%)filing

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