BeOne Medicines Ltd.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended March 31, 2026

OR

For the transition period from to

Commission File Number:001-37686

(Exact name of registrant as specified in its charter)

+4161 685 19 00

(Registrant’s telephone number, including area code)

*Included in connection with the registration of the American Depositary Shares with the Securities and Exchange Commission. The ordinary shares are not listed for trading in the United States but are listed for trading on The Stock Exchange of Hong Kong Limited.

As of April 30, 2026,1,445,262,342 ordinary shares, par value $0.0001 per share, were outstanding, of which 713,513,697 ordinary shares were held in the form of 54,885,669 American Depositary Shares, each representing 13 ordinary shares, and 115,055,260 were RMB shares which are ordinary shares issued to permitted investors in China and listed on the Science and Technology Innovation Board of the Shanghai Stock Exchange in Renminbi.

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports); and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No☒

BeOne Medicines Ltd.

Quarterly Report on Form 10-Q

TABLE OF CONTENTS

From time to time, we may use our website, our X account atx.com/BeOneMedicines, our LinkedIn account at linkedin.com/company/BeOneMedicines, our Facebook account at facebook.com/BeOneMedicines, and our Instagram account at instagram.com/BeOneMedicines to disclose material information and to comply with our disclosure obligations under Regulation FD. Our financial and other material information is routinely posted to and accessible on the Investors section of our website, available at www.beonemedicines.com. Investors are encouraged to review the Investors section of our website because we may post material information on that site that is not otherwise disseminated by us. Information that is contained in and can be accessed through our website, our X posts, our LinkedIn posts and our Instagram posts are not incorporated into, and does not form a part of, this Quarterly Report.