BeOne Medicines' Chan Lee proposes $421K stock sale

The past-three-months table lists two earlier sales under 10b5-1 sales headings, dated August 11 and September 30, 2026.

Available on EDGAR 11/05/2026 - 04:34 PM EST Accepted by SEC EDGAR 11/05/2026 - 04:31 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

BeOne Medicines Ltd. (ONC) officer Chan Lee reported a proposed sale of 1,115 ADS, with an aggregate market value of $421,224.70, through Morgan Stanley Smith Barney LLC, with an approximate sale date of November 5, 2026, on NASDAQ. The securities-to-be-sold table lists the ADS as acquired from the issuer through restricted stock units on July 29, 2022. The past-three-months table lists sales of 1,115 ADS for gross proceeds of $418,125.00 on September 30, 2026, and 2,666 ADS for gross proceeds of $959,760.00 on August 11, 2026, under “10b5-1 Sales for Chan Lee.”

Key Figures

Proposed sale: 1,115 ADS Aggregate market value: $421,224.70 ADS sold: 1,115 ADS +3 more

6 metrics

Proposed sale 1,115 ADS Approximate sale date November 5, 2026

Aggregate market value $421,224.70 Proposed sale

ADS sold 1,115 ADS September 30, 2026; past-three-months table

Gross proceeds $418,125.00 September 30, 2026 sale

ADS sold 2,666 ADS August 11, 2026; past-three-months table

Gross proceeds $959,760.00 August 11, 2026 sale

Key Terms

ADS, Restricted Stock Units, 10b5-1 Sales, Rule 144

4 terms

ADS financial

"ADS"

Ads are paid promotional messages a company places across media — online, on TV, in print, or on social platforms — to attract customers, explain products, or shape public perception. For investors, ads matter because they drive sales growth, affect how much a company must spend to win customers, and influence brand strength and long-term value. Ads can also create regulatory or reputational risk if claims are misleading, which can affect profits and stock price.

Restricted Stock Units financial

"Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

10b5-1 Sales financial

"10b5-1 Sales for CHAN LEE"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Rule 144 regulatory

"See the definition of “person” in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

FAQ

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

How many ONC ADS does Chan Lee propose to sell?

Chan Lee's notice lists a proposed sale of 1,115 ADS with an aggregate market value of $421,224.70, through Morgan Stanley Smith Barney LLC, with an approximate sale date of November 5, 2026, on NASDAQ.

What previous ONC ADS sales does the notice list for Chan Lee?

The past-three-months table lists a sale of 1,115 ADS for gross proceeds of $418,125.00 on September 30, 2026, and a sale of 2,666 ADS for gross proceeds of $959,760.00 on August 11, 2026. Both appear under “10b5-1 Sales for Chan Lee.”

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001980648
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	BEONE MEDICINES LTD
SEC File Number	001-37686
Address of Issuer	Aeschengraben 27 Basel SWITZERLAND 4051
Phone	41616851900
Name of Person for Whose Account the Securities are To Be Sold	CHAN LEE
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
ADS	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1115	421224.70	58926111	11/05/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
ADS	07/29/2022	Restricted Stock Units	Issuer			1115	07/29/2022	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for CHAN LEE Aeschengraben 27 Basel V8 4051	ADS	09/30/2026	1115	418125.00
10b5-1 Sales for CHAN LEE Aeschengraben 27 Basel V8 4051	ADS	08/11/2026	2666	959760.00

144: Remarks and Signature

Remarks
Date of Notice	11/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/29/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Chan Lee
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)