Latham & Watkins LLP and Leerink Swann LLC acted as advisors to OncoMed for this transaction.OncoMed Conference Call OncoMed management will host a conference call today beginning at 8:30 a.m. ET/5:30 a.m. PT to discuss today's announcement regarding this strategic collaboration with Celgene Corporation. Analysts and investors can participate in the conference call by dialing (855) 420-0692 for domestic callers and (484) 756-4194 for international callers. The live conference call will also be webcast and available on the Investor Relations page of OncoMed's website at www.oncomed.com . Please access the webcast at least 10 minutes prior to the start of the call to ensure time for any software downloads that may be required. A telephone replay will be available following the conclusion of the call by dialing (855) 859-2056 for domestic callers and (404) 537-3406 for international callers using the passcode 19812706. About Cancer Stem Cells Cancer stem cells, or CSCs, are the subpopulation of cells in a tumor responsible for driving growth and metastasis of the tumor. CSCs, also known as tumor-initiating cells, exhibit certain properties which include the capacity to divide and give rise to new CSCs via a process called self-renewal and the capacity to differentiate or change into the other cells that form the bulk of the tumor. Common cancer drugs target bulk tumor cells but have limited impact on CSCs, thereby providing a path for recurrence of the tumor. OncoMed has advanced five distinct anti-CSC targeting product candidates into clinical trials, including demcizumab (OMP-21M18). OncoMed believes its product candidates are distinct from the current generations of chemotherapies and targeted therapies, and have the potential to significantly impact cancer treatment and the clinical outcome of patients with cancer. About Demcizumab (OMP-21M18) Demcizumab is a humanized monoclonal antibody that inhibits Delta-Like Ligand 4 (DLL4) in the Notch signaling pathway. Two Phase Ib combination trials of demcizumab are ongoing: demcizumab with standard-of-care in first-line advanced pancreatic cancer patients, and demcizumab with standard-of-care carboplatin and pemetrexed (Alimta™) in first-line advanced non-small cell lung cancer (NSCLC) patients. In addition, a Phase Ib/II trial of demcizumab and paclitaxel in patients with platinum-resistant ovarian cancer is ongoing at MD Anderson Cancer Center. Demcizumab is part of OncoMed's collaboration with Celgene Corporation.