BeOne Medicines CFO sells ADS for tax withholding

BeOne Medicines Ltd. Chief Financial Officer Aaron Rosenberg sold 1,157 American Depositary Shares at $312.715 per ADS on August 3, 2026, to satisfy mandatory tax withholding tied to vesting of a restricted share unit award.

Rhea-AI Filing Summary

BeOne Medicines Ltd. Chief Financial Officer Aaron Rosenberg sold 1,157 American Depositary Shares at $312.715 per ADS on August 3, 2026, to satisfy mandatory tax withholding tied to vesting of a restricted share unit award. After this transaction he held 382,850 Ordinary Shares directly. Each American Depositary Share represents 13 Ordinary Shares, and the restricted share unit award vests in four equal annual installments on each anniversary of July 31, 2024, with remaining unvested units eligible for accelerated vesting upon certain termination events.

Insider Trade Summary

Net Seller: 1,157 shares

Net Sell 2 txns

Insider Rosenberg Aaron

Role Chief Financial Officer

Sold 1,157 shs ($362K)

Type	Security	Shares	Price	Value
Sale	American Depositary Shares F1, F2	1,157	$312.715	$362K
holding	Ordinary Shares	--	--	--

Holdings After Transaction: American Depositary Shares — 0 shares (Direct); Ordinary Shares — 382,850 shares (Direct)

Footnotes (2)

1. F1. Each American Depositary Share represents 13 Ordinary Shares.
2. F2. The sale was effected pursuant to a mandatory tax withholding provision in the Reporting Person's restricted share unit award agreement in connection with the vesting of a restricted share unit award previously granted to the Reporting Person. 1/4th of the securities will vest on each anniversary of July 31, 2024, subject to continued service. Unvested securities are subject to accelerated vesting upon certain termination events.

Key Figures

ADS sold: 1,157 American Depositary Shares Sale price per ADS: $312.715 per American Depositary Share Ordinary Shares held after transaction: 382,850 Ordinary Shares +1 more

4 metrics

ADS sold 1,157 American Depositary Shares Sale on August 3, 2026 by CFO Aaron Rosenberg

Sale price per ADS $312.715 per American Depositary Share Price for the 1,157 ADS sold on August 3, 2026

Ordinary Shares held after transaction 382,850 Ordinary Shares Direct holdings reported after the August 3, 2026 transaction

ADS to Ordinary Share ratio 1 ADS represents 13 Ordinary Shares Representation ratio for BeOne Medicines ADS

Key Terms

American Depositary Shares, restricted share unit award, mandatory tax withholding provision, accelerated vesting

4 terms

American Depositary Shares financial

"Each American Depositary Share represents 13 Ordinary Shares."

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 share unit award financial

"in connection with the vesting of a restricted share unit award previously granted"

mandatory tax withholding provision financial

"The sale was effected pursuant to a mandatory tax withholding provision"

accelerated vesting financial

"Unvested securities are subject to accelerated vesting upon certain termination events"

A contract feature that makes stock awards, options, or restricted shares become owned or exercisable earlier than the original schedule. It shortens or cancels the waiting period so recipients can sell, transfer, or exercise their equity sooner — think of a timed lock that is unlocked ahead of schedule. It matters to investors because it changes when shares enter the market, who controls them, and how much dilution or ownership concentration happens.

FAQ

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

What insider transaction did BeOne Medicines (ONC) report for its CFO?

BeOne Medicines’ CFO Aaron Rosenberg sold 1,157 American Depositary Shares on August 3, 2026, at $312.715 per ADS. The sale was executed to cover tax withholding obligations related to vesting of a restricted share unit award previously granted to him.

Why did the BeOne Medicines (ONC) CFO sell 1,157 ADS?

The 1,157 ADS sale was pursuant to a mandatory tax withholding provision in the CFO’s restricted share unit award agreement. The transaction was executed in connection with the vesting of that award rather than as a discretionary portfolio trade.

How many shares does the BeOne Medicines (ONC) CFO hold after the reported sale?

Following the August 3, 2026 transaction, CFO Aaron Rosenberg directly held 382,850 Ordinary Shares of BeOne Medicines. He reported zero American Depositary Shares owned directly after the tax-related sale of 1,157 ADS.

What is the relationship between BeOne Medicines (ONC) ADS and Ordinary Shares?

Each BeOne Medicines American Depositary Share represents 13 Ordinary Shares. This ADS ratio is important for understanding the economic exposure of the 1,157 ADS sold relative to the company’s Ordinary Shares underlying those depositary receipts.

How does the BeOne Medicines (ONC) CFO’s restricted share unit award vest?

The restricted share unit award to the CFO vests 1/4 on each anniversary of July 31, 2024, subject to continued service. Any remaining unvested securities are subject to accelerated vesting if certain termination events occur.

Was the BeOne Medicines (ONC) CFO sale made under a Rule 10b5-1 plan?

The disclosure indicates the Rule 10b5-1 checkbox is not marked as an affirmative trading plan. Instead, the sale is described as arising from a mandatory tax withholding provision linked to the restricted share unit award’s vesting terms.

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

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Available on EDGAR 08/05/2026 - 05:16 PM Accepted by SEC EDGAR 08/05/2026 - 05:15 PM 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^*

Rosenberg Aaron

(Last) (First) (Middle)

C/O BEONE MEDICINES I GMBH

AESCHENGRABEN 27, 21ST FLOOR

(Street)

BASEL 4051

(City) (State) (Zip)

SWITZERLAND

(Country)

2. Issuer Name and Ticker or Trading Symbol
BeOne Medicines Ltd. [ ONC ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/03/2026

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
Ordinary Shares								382,850	D
American Depositary Shares(1)	08/03/2026		S(2)		1,157	D	$312.715	0	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 represents 13 Ordinary Shares.

2. The sale was effected pursuant to a mandatory tax withholding provision in the Reporting Person's restricted share unit award agreement in connection with the vesting of a restricted share unit award previously granted to the Reporting Person. 1/4th of the securities will vest on each anniversary of July 31, 2024, subject to continued service. Unvested securities are subject to accelerated vesting upon certain termination events.

Remarks:

	/s/ Chan Henry Lee, as Attorney-in-Fact	08/05/2026
	** 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)