BeOne Medicines: Chan Lee proposes $407K stock sale

The securities were acquired through restricted stock unit vesting between July 29, 2022, and June 10, 2025.

Rhea-AI Filing Summary

For BeOne Medicines Ltd. (ONC), officer Chan Lee reported a proposed sale of 1,115 ADS with an aggregate market value of $407,276.05; the approximate sale date is September 30, 2026, and Morgan Stanley Smith Barney LLC is listed as broker. The securities to be sold were acquired upon vesting of restricted stock units from July 29, 2022, through June 10, 2025. The past-three-month sales table lists four earlier transactions, three labeled as 10b5-1 sales and one in common shares.

Key Figures

Proposed sale: 1,115 ADS Aggregate market value: $407,276.05 Prior sale: 2,666 ADS; $959,760.00 +3 more

6 metrics

Proposed sale 1,115 ADS Chan Lee; approximate sale date September 30, 2026

Aggregate market value $407,276.05 Proposed sale of 1,115 ADS

Prior sale 2,666 ADS; $959,760.00 August 11, 2026

Prior sale 1,044 common shares; $337,932.36 July 30, 2026

Prior sale 1,669 ADS; $542,425.00 July 22, 2026

Prior sale 664 ADS; $200,833.44 July 8, 2026

Key Terms

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

4 terms

ADS technical

"ADS to be sold"

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

"acquired upon the vesting of restricted stock units"

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.

Rule 144 regulatory

"sales required by paragraph (e) 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.

10b5-1 Sales regulatory

"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.

FAQ

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

How many ONC ADS is Chan Lee proposing to sell?

Chan Lee reported a proposed sale of 1,115 ADS, with an aggregate market value of $407,276.05. The approximate sale date listed is September 30, 2026.

Where did Chan Lee's ONC securities to be sold come from?

The securities to be sold were acquired upon vesting of restricted stock units from July 29, 2022, through June 10, 2025.

What prior sales does Chan Lee's ONC notice list?

The past-three-month table lists 2,666 ADS on August 11, 2026, for $959,760.00; 1,044 common shares on July 30, 2026, for $337,932.36; 1,669 ADS on July 22, 2026, for $542,425.00; and 664 ADS on July 8, 2026, for $200,833.44. The first, third, and fourth entries are labeled 10b5-1 sales.

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

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Available on EDGAR 09/30/2026 - 04:21 PM Accepted by SEC EDGAR 09/30/2026 - 04:20 PM Learn about SEC filing dates

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	407276.05	57914782	09/30/2026	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	08/11/2026	2666	959760.00
CHAN LEE Aeschengraben 27 Basel V8 4051	Common	07/30/2026	1044	337932.36
10b5-1 Sales for CHAN LEE Aeschengraben 27 Basel V8 4051	ADS	07/22/2026	1669	542425.00
10b5-1 Sales for CHAN LEE Aeschengraben 27 Basel V8 4051	ADS	07/08/2026	664	200833.44

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 07/29/2022 through 06/10/2025
Date of Notice	09/30/2026
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)