Bristol Myers Squibb Announces MeziKd Trial Results
Bristol Myers Squibb announced late-breaking results from the Phase 3 SUCCESSOR-2 trial of CELMoD mezigdomide in combination with carfilzomib and dexamethasone versus carfilzomib and dexamethasone alone in patients with relapsed or refractory multiple myeloma. Results showed MeziKd demonstrated a clinically meaningful and statistically significant improvement in progression-free survival, representing a 52% reduction in the risk of disease progression or death compared with Kd. These data, representing the first Phase 3 results for mezigdomide, are being presented in a late-breaking oral presentation at the 2026 American Society of Clinical Oncology Annual Meeting. "The combination of MeziKd demonstrated a promising median progression-free survival rate of 18 months in multiple settings of relapsed, refractory multiple myeloma, along with a consistent safety profile and the convenience of oral administration and ability to implement across diverse care settings," said Paul Richardson, MD, Director of Clinical Research and Clinical Program Leader at the Jerome Lipper Multiple Myeloma Center, the Dana-Farber Cancer Institute and RJ Corman Professor of Medicine, Harvard Medical School. "Maintaining durable disease control becomes an increasing challenge with each line of therapy for patients with relapsed or refractory disease and increasing resistance to therapy, so achieving extended progression-free survival of a year and a half is especially meaningful. These promising results at ASCO underscore MeziKd's potential, particularly for those patients who need additional options after both early and later relapse." Results also showed significantly improved PFS rates with MeziKd across patients in second- and third-line as well as those with higher-risk disease. Higher overall response rate and complete response or better were also seen with MeziKd. Median overall survival was not yet reached. The safety profile of MeziKd was consistent with the known profile of mezigdomide and the combination regimen. Grade 3-4 treatment-emergent adverse events were seen in 83.7% vs 56.5% of patients, with neutropenia in 61.1% vs 9.1%, and infections in 34.0% vs 15.6% of patients treated with MeziKd and Kd, respectively.
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- Impressive Survival Data: Bristol-Myers Squibb's (BMY) late-stage SUCCESSOR-2 trial for its multiple myeloma candidate mezigdomide demonstrated over a 50% improvement in cancer-free survival, positively impacting C4 Therapeutics (CCCC) stock performance.
- Strong Market Reaction: Following BMY's announcement, C4 Therapeutics' stock surged to a 52-week high, indicating increased investor confidence in its lead candidate cemsidomide, particularly given the similarities in treatment strategies.
- Future Data Sharing Plans: C4 plans to present data from a Phase 1b trial evaluating cemsidomide in combination with approved multiple myeloma therapies in H2 2026, which will further support its market prospects.
- Analyst Optimism: Jefferies analyst Akash Tewari expressed a positive outlook for C4, suggesting that BMY's favorable data will have a beneficial read-through for C4, maintaining a Buy rating on the stock, reflecting market recognition of its growth potential.
- Clinical Trial Success: Bristol Myers Squibb's antitumor candidate mezigdomide improved cancer-free survival by over 50% in a late-stage trial for multiple myeloma, demonstrating significant clinical and statistical relevance.
- Patient Data Analysis: In the open-label Phase 3 SUCCESSOR-2 trial, 479 patients were enrolled, and the mezigdomide-containing regimen reduced the risk of disease progression or death by 52% compared to the standard treatment.
- Safety Assessment: While mezigdomide showed a safety profile consistent with past data, 83.7% of patients experienced Grade 3 or 4 treatment-emergent adverse events, compared to 56.5% in the comparator arm, indicating a higher incidence of side effects.
- Future Outlook: Data from the SUCCESSOR-2 trial will be presented at the ASCO 2026 meeting and is set to be submitted to health regulators, further enhancing the market potential of this therapy.
- Industry Growth Outlook: JW Therapeutics CEO Leo Tian stated that despite Beijing's tightening scrutiny over sensitive technology deals, China's pharmaceutical sector remains robust, with biotech licensing deals expected to reach new heights, indicating strong demand for China-developed experimental medicines.
- Reliance on International Collaboration: JW Therapeutics continues to thrive in cross-border collaborations, particularly in cell and gene therapies, with Tian emphasizing that the company has not felt any impact from regulatory changes, showcasing its stability and adaptability in the international market.
- Investor Confidence Challenges: While JW Therapeutics operates normally, China's blocking of Meta's acquisition of Manus may heighten risks for global investors looking to invest in advanced tech firms with ties to the country, potentially affecting future investment decisions.
- Exploring Cooperation Opportunities: JW is actively seeking collaborations with companies outside China, particularly within its product pipeline, reflecting the company's strategic intent to expand in the global market.
- Patent Cliff Risk: Bristol Myers Squibb faces a daunting patent cliff, with sales of its blood cancer drug Revlimid sharply declining due to generic competition, while its top-selling drugs Eliquis and Opdivo will lose U.S. patent exclusivity in 2028, potentially leading to significant future revenue declines.
- Acquisition Integration Challenges: The company acquired Mirati Therapeutics, Karuna Therapeutics, and RayzeBio in 2023, and while these acquisitions may enhance growth prospects, they also introduce integration and clinical risks that could impact short-term financial performance.
- Growth vs. Legacy Drug Conflict: Although Bristol Myers Squibb emphasized in its 2026 Q1 earnings report that its growth portfolio constitutes the majority of total revenue, legacy drugs still account for approximately 46% of revenue, and with total revenue increasing by only 1% on a constant-currency basis, there is a risk that new drugs may not offset losses from older blockbusters.
- Investor Risk Appetite: For risk-averse investors, Bristol Myers Squibb may not be an ideal choice, while patient long-term investors might find the 4.2% dividend yield appealing, indicating that the stock could still be attractive under certain investment styles.
- Patent Cliff Risks: Bristol Myers Squibb's blood cancer drug Revlimid is experiencing a sharp decline in sales due to generic competition, and its two top-selling products, Eliquis and Opdivo, are set to lose U.S. patent exclusivity by 2028, posing significant revenue challenges ahead.
- Limited Growth Potential: Although the company has made acquisitions of Mirati Therapeutics, Karuna Therapeutics, and RayzeBio in 2023 to enhance growth prospects, its legacy drugs still account for approximately 46% of total revenue, with overall revenue growth stagnating at just 1%, indicating that new drugs may not offset losses from older blockbusters.
- Diverging Investor Sentiment: Risk-averse investors may find Bristol Myers Squibb's stock unattractive, while patient investors could be drawn to its 4.2% dividend yield, despite the company's fortunes not expected to improve significantly in the short term.
- Poor Market Performance: Despite a rebound of about 11% after a decline, Bristol Myers Squibb's shares remain below their early March peak, with a forward P/E ratio of only 9.4 suggesting potential undervaluation, but investors should remain cautious of integration and clinical risks.










