Zai Lab director awarded 22,371 ADS grant

Lis William reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Lis William reported acquisition or exercise transactions in this Form 4 filing.

Zai Lab Ltd director William Lis received a grant of 22,371 American Depositary Shares as equity compensation. The award was made at no cash cost per ADS and increases his direct holdings to 57,477 ADS.

The granted ADS are restricted shares that vest in full on June 17, 2027, if he continues serving on the board. Each ADS represents ten ordinary shares, and the company notes that ADSs and ordinary shares are fully fungible.

Insider Trade Summary

Grant/Award: 22,371 shares

Grant/Award 1 txn

Insider Lis William

Role Director

Type	Security	Shares	Price	Value
Grant/Award	American Depositary Shares	22,371	$0.00	$0.00

Holdings After Transaction: American Depositary Shares — 57,477 shares (Direct)

Footnotes (2)

1. F1. Each American Depositary Share ("ADS") represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs.
2. F2. Represents restricted shares that vest in full on June 17, 2027, subject to the Reporting Person's continued service as a member of the issuer's board of directors through such vesting date.

Key Figures

Equity grant size: 22,371 ADS Post-grant holdings: 57,477 ADS Grant price: $0.00 per ADS +2 more

5 metrics

Equity grant size 22,371 ADS Restricted share award to director on June 17, 2026

Post-grant holdings 57,477 ADS Total American Depositary Shares held directly after transaction

Grant price $0.00 per ADS Reported transaction price for the awarded ADS

ADS to ordinary share ratio 1 ADS = 10 ordinary shares Equivalence stated for Zai Lab’s ADS structure

Vesting date June 17, 2027 Restricted shares vest in full on this date

Key Terms

American Depositary Shares, restricted shares, vest in full, board of directors, +1 more

5 terms

American Depositary Shares financial

"Each American Depositary Share ("ADS") represents ten Ordinary Shares of the issuer."

American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.

restricted shares financial

"Represents restricted shares that vest in full on June 17, 2027, subject to continued service."

Restricted shares are company stock that cannot be sold or transferred immediately because they are subject to legal or contractual limits, such as a required holding period or performance conditions. They matter to investors because these locked-up shares can affect a company’s available stock for trading, future dilution, and insider incentives—imagine a gift that can’t be cashed until certain conditions are met, which changes when and how much supply can suddenly enter the market.

vest in full financial

"Represents restricted shares that vest in full on June 17, 2027, subject to continued service."

board of directors financial

"subject to the Reporting Person's continued service as a member of the issuer's board of directors"

The Board of Directors is a group of people chosen by a company's owners to help make big decisions and oversee how the company is run. They act like a team of advisors or managers, making sure the company stays on track and meets its goals. Their choices can influence the company's success and how it grows.

fully fungible financial

"Our ADSs and Ordinary Shares are fully fungible."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Zai Lab (ZLAB) director William Lis report?

Director William Lis reported receiving 22,371 American Depositary Shares as an equity grant. The award was recorded at a price of $0.00 per ADS and reflects compensation rather than an open-market purchase or sale of Zai Lab securities.

How many Zai Lab (ZLAB) ADS does William Lis hold after this grant?

After the grant, William Lis directly holds 57,477 American Depositary Shares of Zai Lab. This total includes the newly granted 22,371 restricted ADS and represents his direct ownership position reported in the Form 4 insider filing for the June 17, 2026 transaction.

What are the vesting terms of William Lis’s new Zai Lab (ZLAB) restricted shares?

The 22,371 restricted shares granted to William Lis vest in full on June 17, 2027. Vesting is conditional on his continued service as a member of Zai Lab’s board of directors through that date, aligning the award with ongoing board participation.

How many ordinary shares does each Zai Lab (ZLAB) ADS represent in this filing?

Each American Depositary Share in this Zai Lab filing represents ten ordinary shares of the issuer. The company states that its ADSs and ordinary shares are fully fungible, and for this Form 4, all amounts are reported in terms of ADS rather than ordinary shares.

Was cash paid for the Zai Lab (ZLAB) ADS granted to William Lis?

No cash was paid for the newly granted American Depositary Shares to William Lis, which were reported at a price of $0.00 per ADS. This indicates the shares were awarded as restricted stock compensation instead of acquired through an open-market purchase transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/22/2026 - 04:08 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Lis William

(Last) (First) (Middle)

C/O ZAI LAB LIMITED

314 MAIN STREET, 4TH FLOOR, SUITE 100

(Street)

CAMBRIDGE MASSACHUSETTS 02142

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Zai Lab Ltd [ ZLAB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
American Depositary Shares(1)	06/17/2026		A		22,371(2)	A	$0	57,477	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Each American Depositary Share ("ADS") represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs.

2. Represents restricted shares that vest in full on June 17, 2027, subject to the Reporting Person's continued service as a member of the issuer's board of directors through such vesting date.

	/s/ Bruce Blefeld, Attorney-in-Fact	06/22/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)