BeiGene Highlights Growing Portfolio and Pipeline Targeting Hematologic Malignancies at European Hematology Association 2022 Congress

• Clinical data and patient-reported outcomes across extensive clinical development program for zanubrutinib (BRUKINSA^®) reinforce its potential across B-cell malignancies
• Long-term safety and efficacy results from the Phase 3 ASPEN trial of zanubrutinib versus ibrutinib in patients with Waldenström macroglobulinemia
• Oral presentation for the Phase 2 ROSEWOOD trial of zanubrutinib plus obinutuzumab in follicular lymphoma
• New results for BGB-11417, a highly selective investigative inhibitor of BCL2 in CLL, non-Hodgkin’s lymphoma, and acute myeloid leukemia

BeiGene (NASDAQ: BGNE; HKEX: 06160; SSE: 688235), a global, science-driven biotechnology company focused on developing innovative and affordable medicines to improve treatment outcomes and access for patients worldwide, presents data from its hematology portfolio at the European Hematology Association (EHA) 2022 Hybrid Congress being held June 9-12, 2022, in Vienna, Austria.

“Our data presentations at EHA build a more complete picture of the potential for our BTK inhibitor zanubrutinib across a number of hematologic malignancies, with positive clinical results from ROSEWOOD in follicular lymphoma, long-term efficacy and safety results from ASPEN, as well as patient-reported outcomes from ALPINE and SEQUIOA.” said Lai Wang, Ph.D., Global Head of R&D at BeiGene. “We are seeing our promising early pipeline beginning to mature as a result of our deep expertise in developing treatments for hematologic malignancies, and we’re pleased to present positive proof-of-concept data from two studies with our BCL2 inhibitor, BGB-11417, at this important hematology meeting.”

Highlights from the broad clinical program for zanubrutinib (BRUKINSA^®) presented at EHA include:

• ASPEN: Long-term safety and efficacy results from the Phase 3 ASPEN trial of zanubrutinib versus ibrutinib in patients with Waldenström macroglobulinemia (WM) showed that, at a median follow up of 43 months, zanubrutinib continued to demonstrate clinically meaningful efficacy and a tolerable safety profile in patients with WM.
• ROSEWOOD: The Phase 2 ROSEWOOD trial of zanubrutinib plus obinutuzumab versus (vs.) obinutuzumab monotherapy in patients with relapsed/refractory (R/R) follicular lymphoma met its primary endpoint of overall response rate (ORR) and was generally well-tolerated, with safety results consistent with previous studies of both medicines.
• ALPINE: In the head-to-head ALPINE trial of zanubrutinib versus ibrutinib in patients with R/R chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL), those who received zanubrutinib monotherapy reported improvements in key health-related quality of life (HRQoL) endpoints compared with patients who received ibrutinib monotherapy.
• SEQUOIA: In the SEQUOIA trial of zanubrutinib vs. bendamustine plus rituximab (BR), zanubrutinib was associated with significant improvements in HRQoL in patients with treatment-naïve (TN) CLL/SLL without del(17p), as indicated by patient reported outcome (PRO) endpoints.

The ROSEWOOD and ASPEN study findings were presented at the American Society of Cancer Oncology (ASCO) Annual Meeting in June 2022.

BeiGene also presented two posters from proof-of-concept studies of BGB-11417, a highly selective investigational BCL2 inhibitor in CLL, non-Hodgkin’s lymphoma and acute myeloid leukemia (AML).

• Preliminary data from an ongoing Phase 1/1b dose-escalation and expansion study evaluating the safety, tolerability, maximum tolerated dose (MTD), and recommended Phase 2 dose of oral BGB-11417 as monotherapy or in combination with zanubrutinib, in patients with B-cell malignancies, showed promising efficacy potential for BGB-11417 and an improved safety profile, particularly in combination cohorts.
• Preliminary data from an ongoing Phase 1b/2 global, multi-center dose escalation and expansion study evaluating BGB-11417 plus azacytidine in patients with AML demonstrated the combination to be generally well-tolerated with the majority of complete responses observed by the end of Cycle 1.

Zanubrutinib Plus Obinutuzumab Versus Obinutuzumab Monotherapy in Patients with Relapsed or Refractory Follicular Lymphoma: Primary Analysis of the Phase 2 Randomized ROSEWOOD Trial

Abstract Number: S205

The ROSEWOOD trial met its primary endpoint, with a 68.3% ORR in the zanubrutinib plus obinutuzumab arm versus 45.8% in the obinutuzumab arm (p = 0.0017) and median follow-up of 12.5 months. Zanubrutinib plus obinutuzumab was generally well-tolerated, with safety results consistent with previous studies of both medicines.

• Zanubrutinib plus obinutuzumab was associated with a deep and durable response, with a complete response (CR) rate of 37.2% compared to 19.4% for obinutuzumab alone; 18-month duration of response rate was 70.9% in the zanubrutinib plus obinutuzumab arm versus 54.6% in the obinutuzumab arm.
• Time to next anti-lymphoma treatment was significantly prolonged in the zanubrutinib plus obinutuzumab arm (HR 0.37 [95% CI, 0.23, 0.60].
• Median progression-free survival was 27.4 months in the zanubrutinib plus obinutuzumab arm compared to 11.2 months in the obinutuzumab arm (HR: 0.51 [95% CI, 0.32, -0.81]).
• The most common adverse events in the zanubrutinib plus obinutuzumab arm were thrombocytopenia or platelet count decreased (34.3% any grade; 14% grade ≥ 3) and neutrophil count decreased or neutropenia (27.3% any grade; 22.4% grade ≥ 3); other adverse events were similar between the two arms.
• Infusion-related reactions were more frequent in the obinutuzumab monotherapy arm.

ASPEN: Long-term Follow-up Results of a Phase 3 Randomized Trial of Zanubrutinib vs. Versus Ibrutinib in Patients with Waldenström Macroglobulinemia (WM)

Abstract Number: P1161

With a median follow-up of 43 months, zanubrutinib continued to demonstrate a clinically meaningful efficacy and tolerable safety profile in patients with WM.

• Exploratory analyses showed a consistent trend of deeper, earlier, and more durable responses (CR+VGPR) compared with ibrutinib over time.
• Median time to CR+VGPR was shorter for zanubrutinib: 6.7 months (range, 1.9-42.0) vs ibrutinib: 16.6 months (range, 2.0-49.9).
• Over the follow-up period, patients receiving zanubrutinib had fewer adverse events leading to death, treatment discontinuation, and dose reduction as compared with ibrutinib.
• The prevalence of atrial fibrillation, hypertension, and bleeding were lower in the zanubrutinib arm at all time intervals; neutropenia occurred early, and prevalence decreased over time for patients receiving zanubrutinib.

Health-related Quality of Life Outcomes Associated with Zanubrutinib vs Ibrutinib Monotherapy in Patients with Relapsed/Refractory (R/R) CLL/SLL: Results from The Randomized Phase 3 ALPINE Trial

Abstract Number: P663

In the Phase 3 open-label ALPINE trial, HRQoL was examined at key cycles (7 and 13; corresponding to 6 and 12 months of treatment, respectively). PRO endpoints included global health status (GHS), physical and role functions, and fatigue, pain, diarrhea, and nausea/vomiting.

• Adjusted completion rates for PROs were high (>85%) in both arms at Cycles 7 and 13.
• Estimated mean treatment differences and 95% CI in key PRO endpoints demonstrated treatment differences, in favor of zanubrutinib, in GHS, physical functioning, and fatigue in Cycle 7, and diarrhea in Cycle 13.
• Mean change from baseline showed greater improvement with zanubrutinib compared with ibrutinib at both Cycle 7 and Cycle 13.

Patient-Reported Outcomes from a Phase 3 Randomized Study of Zanubrutinib Versus Bendamustine Plus Rituximab (BR) in Patients with Treatment-naïve (TN) CLL/SLL

Abstract Number: P662

PROs were secondary endpoints in the Phase 3, open-label,SEQUOIA trial of zanubrutinib (n=241) versus bendamustine plus BR (n=238) in adult patients with TN CLL/SLL without del(17p) and were assessed using the EORTC QLQ-C30, and EQ-5D-5L VAS. The PRO endpoints included GHS, physical and role functions, and symptoms of fatigue, pain, diarrhea, and nausea/vomiting measured at critical clinical cycles of Weeks 12 and 24.

• Across all patients, adjusted completion rates for PROs were high (80%) at Weeks 12 and 24.
• Patients treated with zanubrutinib experienced greater improvements in HRQoL at Weeks 12 and 24 compared with patients who received BR.
• By Week 24, improvements were observed with zanubrutinib vs. BR in GHS, physical functioning, role functioning as well as greater reductions in diarrhea, fatigue, and nausea/vomiting.
• Comparable improvements from baseline between zanubrutinib and BR in the health status were observed at Weeks 12 and 24, respectively.

A Phase 1 Study with the Novel B-Cell Lymphoma 2 Inhibitor BGB-11417 as Monotherapy or in Combination with Zanubrutinib in Patients with B-cell Malignancies: Preliminary Data

Abstract Number: P687

This ongoing first-in-human Phase 1/1b dose-escalation and expansion study evaluated the safety, tolerability, maximum tolerated dose (MTD), and recommended Phase 2 dose of oral BGB-11417, a highly selective investigational inhibitor of BCL2, as monotherapy (n=34) or in combination with zanubrutinib (n=44), in patients with B-cell malignancies.

Early phase 1 results suggested that BGB-11417 monotherapy and combination with zanubrutinib is generally well-tolerated in patients with CLL or NHL at the dose levels tested:

• Dose escalation concluded for monotherapy patients with NHL, with 1 dose limiting toxicity (DLT) seen and no MTD reached at doses as high as 640mg; 1 DLT was seen in monotherapy patients with CLL.
• Transient neutropenia was the most frequent grade ≥3 AE; risk of TLS appears limited and manageable.

Dose escalation was completed for Cohort 1A, with no MTD reached through 640mg and only 1 DLT of grade 3 febrile neutropenia was seen at 160 mg Although dose escalation has not yet been completed for the other cohorts and the follow up is limited, responses were observed at the preliminary dose levels:

• A reduction in ALC was noted among all patients with CLL during ramp-up, with reduction in lymphocytes noted at dose levels as low as 1 mg. Four of six R/R CLL/SLL patients receiving BGB-11417 and zanubrutinib achieved PR-L or better across dose levels ranging from 40 – 320 mg.

Preliminary Safety and Efficacy of BGB-11417, a Potent and Selective B-Cell Lymphoma 2 (BCL2) Inhibitor, in Patients with Acute Myeloid Leukemia

Abstract Number: P590

This ongoing Phase 1b/2, global, multi-center, dose-escalation and expansion study evaluated the combination of BGB-11417 and azacitidine in patients (n=31) with acute myeloid leukemia (TN unfit for intensive chemotherapy or R/R). Preliminary results showed that the 10-day regimen of BGB-11417 in 28-day cycle plus 7-day azacytidine was generally well-tolerated and active across the three dose levels tested (40, 80, 160 mg):

• 58% TN and 55% R/R patients with AML met CR+CRh criteria.
• Most CRs (7 of 11) were achieved by the end of cycle 1.
• Five of 13 evaluable CR/CRi achieved minimal residual disease negativity.
• Neutropenia was the most common grade ≥3 AE (54.8%) and was manageable with growth factor support and dose modification.
• DLTs of grade 4 neutropenia/thrombocytopenia occurred in two patients; safety stopping criteria were not met.
• Higher dose and different dosing scheduling are being explored.

About ASPEN

ASPEN is a randomized, open-label, multi-center Phase 3 study comparing BRUKINSA to ibrutinib in patients with relapsed or refractory (R/R) or treatment-naïve WM. The primary endpoint was proportion of patients achieving complete response or very good partial response (CR+VGPR). Patients with MYD88 mutations were assigned to cohort 1 and randomized 1:1 to receive BRUKINSA 160 mg twice daily or ibrutinib 420 mg once daily. Patients without MYD88 mutations were assigned to cohort 2 and received BRUKINSA160 mg twice daily. A total of 229 patients were enrolled in the trial, with 130 patients receiving BRUKINSA and 99 patients receiving ibrutinib.

As assessed by an independent review committee (IRC) based on the modified Sixth International Workshop on Waldenström Macroglobulinemia (IWWM-6) response criteria (Treon 2015), the combined rate of complete response (CR) and very good partial response (VGPR) in the overall intention-to-treat (ITT) population was 28% with BRUKINSA (95% CI: 20, 38), compared to 19% with ibrutinib (95% CI: 12, 28). While this difference was not statistically significant (p=0.09), BRUKINSA did achieve numerically higher VGPR rates and trends towards increased response quality.

In the ASPEN trial, BRUKINSA demonstrated a more favorable safety profile compared to ibrutinib with lower frequency of certain adverse events, including atrial fibrillation or flutter (2% vs. 15%) and major hemorrhage (6% vs. 9%). Of the 101 patients with WM treated with BRUKINSA, 4% of patients discontinued due to adverse events, and adverse events leading to dose reduction occurred in 14% of patients.

About ROSEWOOD

ROSEWOOD is a randomized, open-label, Phase 2 study comparing BRUKINSA plus obinutuzumab to obinutuzumab alone in patients with R/R FL who have received two or more lines of therapy. The primary endpoint was overall response rate (ORR) assessed by independent central review (ICR) according to Lugano classification. Select secondary endpoints include investigator-assessed ORR, ICR-reviewed and investigator-assessed duration of response (DOR) and progression-free survival (PFS), overall survival (OS), ICR- and investigator-assessed CR and complete metabolic response (CMR) rate. A total of 217 patients were enrolled in the trial, with 145 patients receiving BRUKINSA plus obinutuzumab and 72 patients receiving obinutuzumab.

About BRUKINSA (zanubrutinib)

BRUKINSA (zanubrutinib) is a small molecule inhibitor of Bruton’s tyrosine kinase (BTK) discovered by BeiGene scientists that is currently being evaluated globally in a broad clinical program as a monotherapy and in combination with other therapies to treat various B-cell malignancies. Because new BTK is continuously synthesized, BRUKINSA was specifically designed to deliver complete and sustained inhibition of the BTK protein by optimizing bioavailability, half-life, and selectivity. With differentiated pharmacokinetics compared to other approved BTK inhibitors, BRUKINSA has been demonstrated to inhibit the proliferation of malignant B cells within a number of disease relevant tissues.

BRUKINSA is supported by a broad clinical program which includes more than 3,900 subjects in 35 trials across 28 markets. To date, BRUKINSA has received more than 20 approvals covering nearly 50 countries and regions, including the United States, China, the EU, Great Britain, Canada, Australia, and additional international markets. Currently, more than 40 additional regulatory submissions are in review around the world.

U.S. INDICATIONS and IMPORTANT SAFETY INFORMATION

INDICATIONS

• BRUKINSA is a kinase inhibitor indicated for the treatment of adult patients with mantle cell lymphoma (MCL) who have received at least one prior therapy.

This indication is approved under accelerated approval based on overall response rate. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial.

• BRUKINSA is indicated for the treatment of adult patients with Waldenström’s macroglobulinemia (WM).
• BRUKINSA is indicated for the treatment of adult patients with relapsed or refractory marginal zone lymphoma (MZL) who have received at least one anti-CD20-based regimen.

This indication is approved under accelerated approval based on overall response rate. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial.

Please see full Prescribing Information including Patient Information.

IMPORTANT SAFETY INFORMATION

Warnings and Precautions

Hemorrhage

Fatal and serious hemorrhagic events have occurred in patients with hematological malignancies treated with BRUKINSA monotherapy. Grade 3 or higher hemorrhage events including intracranial and gastrointestinal hemorrhage, hematuria and hemothorax have been reported in 3.4% of patients treated with BRUKINSA monotherapy. Hemorrhage events of any grade occurred in 35% of patients treated with BRUKINSA monotherapy.

Bleeding events have occurred in patients with and without concomitant antiplatelet or anticoagulation therapy. Co-administration of BRUKINSA with antiplatelet or anticoagulant medications may further increase the risk of hemorrhage.

Monitor for signs and symptoms of bleeding. Discontinue BRUKINSA if intracranial hemorrhage of any grade occurs. Consider the benefit-risk of withholding BRUKINSA for 3-7 days pre- and post-surgery depending upon the type of surgery and the risk of bleeding.

Infections

Fatal and serious infections (including bacterial, viral, or fungal) and opportunistic infections have occurred in patients with hematological malignancies treated with BRUKINSA monotherapy. Grade 3 or higher infections occurred in 27% of patients, most commonly pneumonia. Infections due to hepatitis B virus (HBV) reactivation have occurred.

Consider prophylaxis for herpes simplex virus, pneumocystis jiroveci pneumonia and other infections according to standard of care in patients who are at increased risk for infections. Monitor and evaluate patients for fever or other signs and symptoms of infection and treat appropriately.

Cytopenias

Grade 3 or 4 cytopenias, including neutropenia (26%), thrombocytopenia (11%) and anemia (8%) based on laboratory measurements, were reported in patients treated with BRUKINSA monotherapy. Grade 4 neutropenia occurred in 13% of patients, and Grade 4 thrombocytopenia occurred in 3.6% of patients.

Monitor complete blood counts regularly during treatment and interrupt treatment, reduce the dose, or discontinue treatment as warranted. Treat using growth factor or transfusions, as needed.

Second Primary Malignancies

Second primary malignancies, including non-skin carcinoma, have occurred in 14% of patients treated with BRUKINSA monotherapy. The most frequent second primary malignancy was non-melanoma skin cancer, reported in 8% of patients. Other second primary malignancies included malignant solid tumors (4.0%), melanoma (1.7%) and hematologic malignancies (1.2%). Advise patients to use sun protection and monitor patients for the development of second primary malignancies.

Cardiac Arrhythmias

Atrial fibrillation and atrial flutter were reported in 3.2% of patients treated with BRUKINSA monotherapy. Patients with cardiac risk factors, hypertension, and acute infections may be at increased risk. Grade 3 or higher events were reported in 1.1% of patients treated with BRUKINSA monotherapy. Monitor signs and symptoms for atrial fibrillation and atrial flutter and manage as appropriate.

Embryo-Fetal Toxicity

Based on findings in animals, BRUKINSA can cause fetal harm when administered to a pregnant woman. Administration of zanubrutinib to pregnant rats during the period of organogenesis caused embryo-fetal toxicity including malformations at exposures that were 5 times higher than those reported in patients at the recommended dose of 160 mg twice daily. Advise women to avoid becoming pregnant while taking BRUKINSA and for 1 week after the last dose. Advise men to avoid fathering a child during treatment and for 1 week after the last dose.

If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential hazard to a fetus.

Adverse reactions

The most common adverse reactions, including laboratory abnormalities, in ≥ 30% of patients who received BRUKINSA (N = 847) included decreased neutrophil count (54%), upper respiratory tract infection (47%), decreased platelet count (41%), hemorrhage (35%), decreased lymphocyte count (31%), rash (31%) and musculoskeletal pain (30%).

Drug Interactions

CYP3A Inhibitors: When BRUKINSA is co-administered with a strong CYP3A inhibitor, reduce BRUKINSA dose to 80 mg once daily. For coadministration with a moderate CYP3A inhibitor, reduce BRUKINSA dose to 80 mg twice daily.

CYP3A Inducers: Avoid coadministration with moderate or strong CYP3A inducers.

Specific Populations

Hepatic Impairment: The recommended dose of BRUKINSA for patients with severe hepatic impairment is 80 mg orally twice daily.

BeiGene Oncology

BeiGene is committed to advancing best- and first-in-class clinical candidates internally or with like-minded partners to develop impactful and affordable medicines for patients across the globe. We have a growing R&D and medical affairs team of approximately 2,900 colleagues dedicated to advancing more than 100 clinical trials that have involved more than 16,000 subjects. Our expansive portfolio is directed predominantly by our internal colleagues supporting clinical trials in more than 45 countries and regions. Hematology-oncology and solid tumor targeted therapies and immuno-oncology are key focus areas for the Company, with both mono- and combination therapies prioritized in our research and development. BeiGene currently has three approved medicines discovered and developed in our own labs: BTK inhibitor BRUKINSA® in the U.S., China, the European Union, Great Britain, Canada, Australia, and additional international markets; and the non-FC-gamma receptor binding anti-PD-1 antibody tislelizumab as well as the PARP inhibitor pamiparib in China.

About BeiGene

BeiGene is a global, science-driven biotechnology company focused on developing innovative and affordable medicines to improve treatment outcomes and access for patients worldwide. With a broad portfolio of more than 40 clinical candidates, we are expediting development of our diverse pipeline of novel therapeutics through our own capabilities and collaborations. We are committed to radically improving access to medicines for two billion more people by 2030. BeiGene has a growing global team of over 8,000 colleagues across five continents. To learn more about BeiGene, please visit www.beigene.com and follow us on Twitter at @BeiGeneGlobal.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and other federal securities laws, including statements regarding BeiGene's advancement, anticipated clinical development, regulatory milestones and commercialization of BGB-11417 and zanubrutinib, and BeiGene’s plans, commitments, aspirations and goals under the headings “BeiGene Oncology” and “About BeiGene.” Actual results may differ materially from those indicated in the forward-looking statements as a result of various important factors, including BeiGene's ability to demonstrate the efficacy and safety of its drug candidates; the clinical results for its drug candidates, which may not support further development or marketing approval; actions of regulatory agencies, which may affect the initiation, timing, and progress of clinical trials and marketing approval; BeiGene's ability to achieve commercial success for its marketed medicines and drug candidates, if approved; BeiGene's ability to obtain and maintain protection of intellectual property for its medicines and technology; BeiGene's reliance on third parties to conduct drug development, manufacturing and other services; BeiGene’s limited experience in obtaining regulatory approvals and commercializing pharmaceutical products and its ability to obtain additional funding for operations and to complete the development and commercialization of its drug candidates and achieve and maintain profitability; the impact of the COVID-19 pandemic on BeiGene’s clinical development, regulatory, commercial, manufacturing, and other operations, as well as those risks more fully discussed in the section entitled “Risk Factors” in BeiGene’s most recent quarterly report on Form 10-Q as well as discussions of potential risks, uncertainties, and other important factors in BeiGene's subsequent filings with the U.S. Securities and Exchange Commission. All information in this press release is as of the date of this press release, and BeiGene undertakes no duty to update such information unless required by law.

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