Zai Lab director Richard Gaynor buys 1,228 ADSs

Available on EDGAR 11/13/2026 - 05:48 PM EST Accepted by SEC EDGAR 11/13/2026 - 05:48 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Zai Lab Ltd director Richard Gaynor purchased 1,228 American Depositary Shares (ADSs) on November 10, 2026, at $27.19 per ADS. The transaction was made under a Rule 10b5-1 trading plan adopted on December 16, 2025. His direct holdings following the purchase were 81,965 ADSs. Each ADS represents ten Ordinary Shares, and the ADSs and Ordinary Shares are fully fungible.

Insider Trade Summary 10b5-1

Net Buyer: 1,228 shares

Net Buy 1 txn

Insider GAYNOR RICHARD

Role Director

Bought 1,228 shs ($33K)

Increase in Position 1.5%

Type	Security	Shares	Price	Value
Purchase	American Depositary Shares F1, F2	1,228	$27.19	$33K

Holdings After Transaction: American Depositary Shares — 81,965 shares (Direct)

Holdings Before and After: American Depositary Shares, 80,737 to 81,965 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. The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 16, 2025.

Key Figures

ADSs purchased: 1,228 ADSs Purchase price: $27.19 per ADS Direct holdings after purchase: 81,965 ADSs +1 more

4 metrics

ADSs purchased 1,228 ADSs November 10, 2026

Purchase price $27.19 per ADS November 10, 2026

Direct holdings after purchase 81,965 ADSs Following the November 10, 2026 transaction

Ordinary Shares per ADS 10 Ordinary Shares per ADS ADS-to-Ordinary-Share ratio stated for the transaction

Key Terms

American Depositary Share, Rule 10b5-1 trading plan, fully fungible

3 terms

American Depositary Share technical

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

An American Depositary Share (ADS) is a U.S.-listed certificate that represents a specified number of shares in a foreign company, held by a custodian bank; it works like a receipt that allows U.S. investors to buy and trade foreign equity on American exchanges without dealing with another country’s markets. Investors care because ADSs make foreign stocks easier to access, improve liquidity and settlement in dollars, and can affect dividend payments, voting rights and regulatory oversight compared with buying the underlying foreign shares directly.

Rule 10b5-1 trading plan regulatory

"pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

fully fungible technical

"Our ADSs and Ordinary Shares are fully fungible."

FAQ

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

How many ZLAB ADSs did director Richard Gaynor buy, and at what price?

Richard Gaynor purchased 1,228 ADSs at $27.19 per ADS on November 10, 2026, under a Rule 10b5-1 trading plan adopted on December 16, 2025. His direct holdings after the transaction were 81,965 ADSs.

How many ordinary shares does each ZLAB ADS represent?

Each ADS represents ten Ordinary Shares, and the ADSs and Ordinary Shares are fully fungible.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

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).

X

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^*

GAYNOR RICHARD

(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)
11/10/2026

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)	11/10/2026		P(2)		1,228	A	$27.19	81,965	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. The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 16, 2025.

	/s/ Bruce Blefeld, Attorney-in-Fact	11/13/2026
	** 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)