Vaxcyte Publishes Positive Results of VAX-31 Clinical Study
Written by Emily J. Thompson, Senior Investment Analyst
Updated: 6 days ago
0mins
Should l Buy PCVX?
The company states: "Vaxcyte announced the publication of results from the positive VAX-31 adult Phase 1/2 clinical study in the journal The Lancet Infectious Diseases. The study evaluated the safety, tolerability and immunogenicity of VAX-31, the Company's next-generation 31-valent pneumococcal conjugate vaccine candidate, for the prevention of invasive pneumococcal disease and pneumonia compared to one of the current standard-of-care vaccines, Prevnar 20, in healthy adults aged 50 years and older. Based on the positive results of this Phase 1/2 study, VAX-31 is currently being evaluated in the OPUS Phase 3 adult program. The study results showed that VAX-31 was observed to be well tolerated and demonstrated a safety profile similar to PCV20 through the full six-month evaluation period at all doses studied. At all doses studied, VAX-31 demonstrated robust opsonophagocytic activity and immunoglobulin G (IgG) immune responses, with high geometric mean concentrations across all 31 serotypes. The VAX-31 High Dose, which is currently being evaluated in the OPUS Phase 3 program, met or exceeded the OPA response non-inferiority criteria for all 20 serotypes common with PCV20 and met the superiority criteria for the 11 incremental serotypes unique to VAX-31 and not in PCV20. The VAX-31 High Dose average OPA immune responses were greater for 18 of 20 serotypes compared to PCV20 (geometric mean ratio greater than 1.0), with seven of these serotypes achieving statistically higher immune responses3 compared to PCV20."
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Analyst Views on PCVX
Wall Street analysts forecast PCVX stock price to rise
6 Analyst Rating
6 Buy
0 Hold
0 Sell
Strong Buy
Current: 54.670
Low
50.00
Averages
104.80
High
163.00
Current: 54.670
Low
50.00
Averages
104.80
High
163.00
About PCVX
Vaxcyte Inc. is a clinical-stage vaccine innovation company. The Company is engaged in developing spectrum conjugate and protein vaccines to prevent or treat bacterial infectious diseases. Its pipeline includes VAX-31, a 31-valent PCV candidate advancing to a Phase III adult clinical program and being evaluated in a Phase II infant clinical program, which is being developed for the prevention of invasive pneumococcal disease (IPD) in adults and infants and is the broadest-spectrum pneumococcal conjugate vaccine (PCV) candidate in the clinic. VAX-24, the Company’s 24-valent PCV candidate, is designed to cover more serotypes than any infant PCV on-market and is being evaluated in a Phase II infant study. Its pipeline also includes VAX-A1, a prophylactic vaccine candidate designed to prevent Group A Strep infections; VAX-PG, a therapeutic vaccine candidate designed to slow or stop the progression of periodontal disease; and VAX-GI, a vaccine candidate designed to prevent Shigella.
About the author
Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
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- Enhanced Legal Support: With over 25 years of legal experience in the life sciences sector, including her role as General Counsel at Vaxcyte, Wright-Mitchell's expertise is expected to strengthen Vera's legal capabilities through key milestones and the potential commercial launch of atacicept.
- Product Development Outlook: Vera's lead product candidate, atacicept, aims to treat IgA nephropathy as a subcutaneous injection administered weekly, which is anticipated to change the standard of care for patients and further enhance the company's market position in immunological diseases.
- Strategic Collaboration and Innovation: Vera Therapeutics has secured an exclusive licensing agreement with Stanford University for the development of a next-generation fusion protein targeting BAFF and APRIL, known as VT-109, showcasing the company's broad potential in treating B-cell-mediated diseases.
See More
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- Ownership Proportion Change: Following this sale, Cogent Biosciences now represents 13.99% of Kynam's reported AUM, yet it remains the fund's largest holding, reflecting ongoing confidence in its core investment despite the reduction.
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See More
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- Upgrades and Downgrades: While specific stock names are not mentioned, such rating changes typically lead to stock price volatility, prompting investors to pay close attention to these shifts for portfolio optimization.
- Market Reaction Expectations: The adjustments in analysts' ratings may trigger short-term market reactions, especially when investor sentiment towards specific stocks is sensitive, thereby impacting overall market sentiment.
- Enhanced Information Transparency: By providing a comprehensive view of analyst rating changes, investors can better understand market dynamics and make more informed investment decisions, thereby improving market transparency and efficiency.
See More
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- Widening Financial Losses: Vaxcyte reported a net loss of $246.5 million for Q4 2025, significantly up from $137.1 million in the same quarter last year, with a full-year net loss of $766.6 million compared to $463.9 million previously, indicating ongoing investments in R&D and operations.
- VAX-31 Clinical Progress: The company's lead 31-valent pneumococcal conjugate vaccine, VAX-31, is undergoing three pivotal Phase 3 trials, with topline data from OPUS-1 expected in Q4 2026, which will provide critical insights for its adult market launch, supported by FDA's Breakthrough Therapy Designation.
- Manufacturing Facility Development: In Q4 2025, Vaxcyte incurred an additional $21.8 million in expenditures for the construction of its dedicated Lonza manufacturing facility, bringing total expenditures to $335.4 million by year-end, with completion in Q1 2026, aimed at supporting the global commercialization of its PCV program.
- New Vaccine Candidates: Beyond VAX-31, Vaxcyte is advancing multiple vaccine candidates including VAX-24, VAX-XL, VAX-A1, and VAX-GI, showcasing the company's diversified strategy in vaccine development, particularly innovative solutions targeting various pathogens.
See More
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- Earnings Miss: Vaxcyte reported a Q4 GAAP EPS of -$5.63, missing estimates by $4.06, indicating significant challenges in profitability that could undermine investor confidence.
- Cash Position: As of December 31, 2025, Vaxcyte holds approximately $2.4 billion in cash, cash equivalents, and investments, highlighting a strong liquidity position, yet future operational expenditures remain a concern.
- Funding Initiative: The company is proposing a $500 million public offering of stock and warrants to bolster its capital structure for future R&D and operations, although market reactions may be tempered by the recent earnings miss.
- Market Impact: Following FDA officials' comments on future vaccine approvals, shares of Moderna and other vaccine makers declined, reflecting market concerns about the vaccine sector's outlook, which could have a ripple effect on Vaxcyte's stock price.
See More
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- Trial Scale and Design: The study will enroll approximately 720 adults aged 50 and older across 30 U.S. sites, with participants randomized to receive either VAX-31 or PCV20, assessing safety, tolerability, and immunogenicity, particularly in boosting immune responses in previously vaccinated individuals.
- Enhanced Vaccine Coverage: VAX-31 is designed to cover approximately 95% of invasive pneumococcal disease and 88% of pneumococcal pneumonia, potentially providing 14-34% broader invasive disease coverage and 19-31% broader pneumonia coverage compared to current vaccines, which may significantly reduce the incidence of related diseases.
- Future Data Expectations: Vaxcyte's broader Phase 3 adult program for VAX-31 includes OPUS-1 and OPUS-2, with key data expected in Q4 2026 and H1 2027 respectively, further advancing the vaccine's market application and Biologics License Application (BLA).
See More
