Summit Therapeutics Partners with Pfizer to Evaluate Novel Cancer Drug Combination Amid Financial Losses
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Summit Therapeutics announces strategic collaboration with Pfizer to evaluate their cancer drug ivonescimab in combination with Pfizer's antibody drug conjugates for solid tumor treatment.
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The company reports significant financial challenges with Q4 adjusted net loss doubling to $50.2 million ($0.07 per share) compared to previous year's $27.9 million.
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Clinical trials for the combination therapy are scheduled to begin mid-2023, with both companies maintaining rights to their respective drugs while exploring innovative treatment approaches.
Summit Therapeutics' shares declined 14% following the announcement of a widening fourth-quarter loss, despite securing a promising clinical trial collaboration with pharmaceutical giant Pfizer. The partnership aims to investigate the therapeutic potential of combining Summit's ivonescimab with Pfizer's antibody drug conjugates (ADCs) in treating solid tumors.
The biopharmaceutical company reported a substantial increase in its non-GAAP net loss, reaching $50.2 million ($0.07 per share) in the fourth quarter, compared to $27.9 million ($0.04 per share) in the previous year. This financial setback overshadowed the potentially significant clinical collaboration announcement.
The newly formed collaboration focuses on evaluating ivonescimab's effectiveness when combined with Pfizer's innovative ADC portfolio. Pfizer will lead the clinical trials, scheduled to commence in mid-2023, while both companies maintain rights to their respective therapeutic agents. The financial terms of the agreement remain undisclosed.
Summit's leadership, including Co-CEOs Bob Duggan and Dr. Maky Zanganeh, expressed optimism about the collaboration's potential. "This partnership with Pfizer will allow us to quickly advance beyond our promising late-stage development plan to evaluate ivonescimab in combination with some of the most innovative ADCs from Pfizer," they stated.
The collaboration represents a strategic approach to expanding treatment options for patients with solid tumors. By combining ivonescimab with Pfizer's ADC technology, the partnership aims to explore potential synergistic effects that could enhance therapeutic outcomes. The initiative builds upon Summit's existing development program for ivonescimab, pushing the boundaries of current treatment paradigms in oncology.
Despite the promising nature of the Pfizer collaboration, market response remained focused on Summit's financial performance, as reflected in the 14% stock decline. However, the partnership with a leading pharmaceutical company like Pfizer potentially positions Summit for future growth in the oncology space, particularly in the development of combination therapies for solid tumors.

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Summit Therapeutics Stock Sinks as Firm Reports Widening Loss
investopedia.com · Feb 24, 2025