ONC files Form 144 to sell 1,328 ADS

ONC submitted a Form 144 reporting the proposed sale of 1,328 ADS on 05/13/2026 following an exercise of stock options.

Rhea-AI Filing Summary

ONC submitted a Form 144 reporting the proposed sale of 1,328 ADS on 05/13/2026 following an exercise of stock options. The filing also discloses prior Rule 10b5-1 sales of 332 ADS on 04/08/2026 for $103,447.88 and 341 ADS on 03/11/2026 for $102,300.00.

Insights

Securities Counsel

Form 144 reports an affiliate resale tied to option exercise.

The filing lists a proposed sale of 1,328 ADS on 05/13/2026 described as resulting from an exercise of stock options. It also itemizes two recent Rule 10b5-1 transactions with exact share counts and proceeds.

Timing and methods are governed by resale rules; subsequent broker reports will show completed trades. This disclosure is procedural and does not itself change issuer financials.

Equity Capital Markets Analyst

Reported sales are modest in scale relative to typical ADS floats.

The disclosed quantities—1,328 ADS proposed, plus prior 332 and 341 ADS sales—represent specific resale activity by an affiliate. The stated cash values for prior trades are $103,447.88 and $102,300.00, respectively.

These are routine insider/affiliate liquidity events; their market impact depends on broader float and trading volume, which are not provided here.

Key Figures

ADS to be sold: 1,328 ADS 10b5-1 sale (Apr): 332 ADS 10b5-1 sale (Mar): 341 ADS +1 more

4 metrics

ADS to be sold 1,328 ADS proposed sale on <date>05/13/2026</date> following exercise of stock options

10b5-1 sale (Apr) 332 ADS <date>04/08/2026</date> for <money>$103,447.88</money>

10b5-1 sale (Mar) 341 ADS <date>03/11/2026</date> for <money>$102,300.00</money>

Filing date 05/13/2026 Form 144 submission and proposed sale date

Key Terms

Form 144, ADS, Rule 10b5-1, exercise of stock options

4 terms

Form 144 regulatory

"submitted a Form 144 reporting the proposed sale"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

ADS financial

"proposed sale of 1,328 ADS on 05/13/2026"

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.

Rule 10b5-1 regulatory

"prior Rule 10b5-1 sales of 332 ADS on 04/08/2026"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

exercise of stock options financial

"following an exercise of stock options"

FAQ

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

What does ONC's Form 144 report about the ADS sale?

It reports a proposed sale of 1,328 ADS on 05/13/2026 tied to an exercise of stock options. The filing lists the sale method and the reseller's status as an affiliate.

What recent sales by the same holder are disclosed for ONC?

The filing shows Rule 10b5-1 sales of 332 ADS on 04/08/2026 for $103,447.88 and 341 ADS on 03/11/2026 for $102,300.00. These are itemized with dates and amounts.

Does the Form 144 state how proceeds will be used by ONC?

The filing ties the transaction to an option exercise and lists cash as the sale consideration; it does not state any company use of proceeds or changes to company finances.

Are these sales completed upon filing the Form 144 for ONC?

Form 144 notifies the market of an intended resale; completion and actual trade details require subsequent broker reporting and are not confirmed within this filing.

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

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Accepted by SEC EDGAR 05/13/2026 - 04:27 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	1328	418412.96	54885669	05/13/2026	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	05/13/2026	Exercise of Stock Options	Issuer			1328	05/13/2026	Cash

* 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	04/08/2026	332	103447.88
10b5-1 Sales for CHAN LEE Aeschengraben 27 Basel V8 4051	ADS	03/11/2026	341	102300.00

144: Remarks and Signature

Remarks	The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
Date of Notice	05/13/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/14/2025
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)