A Phase III Study of BKM120 With Fulvestrant in Patients With HR+,HER2-, AI Treated, Locally Advanced or Metastatic Breast Cancer Who Progressed on or After mTORi

Novartis decided not to pursue further development of buparlisib program. On 19 Dec 2016,
Novartis notified the Investigators about this decision; accordingly the CBKM120F2303 study
was terminated.

Key inclusion criteria

- Female patients age 18 years or older

- Histologically and/or cytologically confirmed diagnosis of breast cancer

- Radiologic evidence of inoperable locally advanced or metastatic breast cancer

- Adequate tumor tissue for the analysis of PI3K-related biomarkers

- Human epidermal growth factor receptor-2 (HER2) negative disease, and a known positive
hormone receptor status

- Postmenopausal women

- Prior treatment with aromatase inhibitors

- Evidence of progression to the combination of mTORi and endocrine therapy given as the
last therapy prior to study entry

- Adequate bone marrow and organ function

- ECOG performance status ≤ 2

Key exclusion criteria

- Previous treatment with PI3K inhibitors, protein kinase B inhibitors or fulvestrant

- More than one chemotherapy line for metastatic disease

- Hypersensitivity to any of the excipients of buparlisib or fulvestrant

- Symptomatic central nervous system metastases

- Concurrent malignancy or malignancy within 3 years of study enrollment

- Certain drugs or radiation within 2-4 weeks of enrollment

- Increasing or chronic treatment (>5 days) with corticosteroids or another
immunosuppressive agent

- Certain scores on an anxiety and depression mood questionnaire given at screening

- Acute viral hepatitis or a history of chronic or active hepatitis B virus or hepatitis
C virus

- Active cardiac disease or a history of cardiac dysfunction