Exelixis IncPipeline optimism for zanzalintinib, with FDA target date set and multiple phase III trials, despite STELLAR-303 setback.

Exelixis shares have surged 26.8% over the past three months, outperforming the industry's 4.5% gain and the broader market. The rally reflects investor optimism about the company's pipeline momentum, particularly its lead candidate zanzalintinib, despite a recent setback in the STELLAR-303 study where the combination with Roche's Tecentriq showed a non-statistically significant overall survival trend in a subset of metastatic colorectal cancer patients without liver metastases. The U.S. FDA has set a target action date of December 3, 2026, for zanzalintinib's new drug application in combination with Tecentriq for previously treated metastatic colorectal cancer, which would mark the drug's first approval and establish a new growth platform beyond flagship therapy Cabometyx. Exelixis is also expanding zanzalintinib's development through collaborations with Merck on multiple phase III trials in colorectal and renal cell carcinoma, and with Natera on molecular residual disease testing. Meanwhile, Cabometyx maintains momentum as the leading prescribed TKI in renal cell carcinoma following a label expansion in March 2025 for certain neuroendocrine tumors.
Exelixis IncPipeline optimism for zanzalintinib, with FDA target date set and multiple phase III trials, despite STELLAR-303 setback.
Merck & Company Inc
Natera Inc
Merck KGaA
Roche Holding AG