The BioWorld Cancer Index closed 2025 up 72.35%, outpacing gains in the Nasdaq Biotechnology Index (up 32.4%) and the Dow Jones Industrial Average (up 12.97%). The year featured standout gains, led by Terns Pharmaceuticals Inc., which surged 620%.
Much-awaited detailed data from Exelixis Inc.’s phase III Stellar-303 study of zanzalintinib, presented at the European Society for Medical Oncology meeting, showed the third-generation, oral tyrosine kinase inhibitor in combination with Tecentriq (atezolizumab, Roche AG) reduced the risk of death by 20% vs. Stivarga (regorafenib, Bayer AG) in patients with previously treated non-microsatellite instability (MSI)-high metastatic colorectal cancer and are expected to pave the way for an NDA filing later this year.
The oncofetal antigen 5T4 is a cell surface glycoprotein overexpressed in many solid tumors, while its expression in normal tissues is limited, making it an attractive target for cancer therapies. Its association with tumor progression and poor prognosis further supports its therapeutic potential.
Drug developer stocks rebounded over July and August, with 23 companies on the BioWorld Drug Developers Index posting gains and only seven declining. The two-month upswing marks a reversal from the February-through-June period, when the index remained in the negative.
Drug developer stocks rebounded over July and August, with 23 companies on the BioWorld Drug Developers Index posting gains and only seven declining. The two-month upswing marks a reversal from the February-through-June period, when the index remained in the negative.
The BioWorld Drug Developers Index (BDDI) rebounded in the second quarter, ending the first half (H1) of 2025 up 1.23% after being down 7.36% at the end of March and 5.52% at April’s close. The BDDI continued to track just below the Dow Jones Industrial Average, which gained 3.64% in H1, and outperformed the Nasdaq Biotechnology Index, which ended June down 1.92%.
Exelixis Inc.’s positive phase III top-line data June 22 with zanzalintinib (zanza) in colorectal cancer had Wall Street speculating anew about the odds with the tyrosine kinase inhibitor in an important indication.
The BioWorld Cancer Index reversed its early year losses, rebounding from a 4.74% decline at the end of the first quarter (Q1) to finish Q2 up 12.78%. The Dow Jones Industrial Average followed a similar pattern, dropping to -4.41% by the end of April before recovering to a 3.64% gain by Q2’s end. Meanwhile, the Nasdaq Biotechnology Index, down 5.37% at the end of May, narrowed its losses to close June down just 1.92%.
Work at Exelixis Inc. has led to the development of antibody-drug conjugates (ADCs) comprising antibodies targeting interleukin-13 receptor subunit α2 (IL-13RA2, IL-13R-α2) covalently linked to a payload. They are described as potentially useful for the treatment of non-small-cell lung cancer (NSCLC) and head and neck squamous cell carcinoma (HNSCC).
Exelixis Inc. has synthesized fused pyrazole derivatives acting as ubiquitin carboxyl-terminal hydrolase 1 (USP1) inhibitors reported to be useful for the treatment of cancer.
