Pfizer Inc. (NYSE:PFE) and Valneva SE (NASDAQ:VALN) reported on August 14 that the European Medicines Agency has validated the Marketing Authorization Application for PF-07307405, the companies' experimental Lyme disease vaccine candidate, and will now begin the official review.
For a vaccine candidate first proposed in a 2020 collaboration deal between Pfizer Inc. (NYSE:PFE) and French biotech Valneva SE (NASDAQ:VALN), this represents the formal transition from years of clinical development into European regulatory review.
The application is based on the Phase 3 VALOR trial, a placebo-controlled, randomized study of 9,437 participants aged five and older from high-incidence Lyme disease locations in US, Canada, and Europe. Participants got four doses on a phased schedule: one at months 0, 2, and 5-9, followed by a fourth dosage around a year later, shortly before the start of the next Lyme season. Topline data released in March 2026 demonstrated efficacy of over 70% in reducing confirmed Lyme disease cases, with the vaccine generally tolerated and no safety issues detected. However, the statistical picture was less clean than the headline efficacy suggests. The first prespecified **** ysis, which served as the primary endpoint, showed 73.2% efficacy but failed the trial's predefined statistical criterion because the lower bound of the 95% confidence interval was 15.8%, below the required 20%. A second prespecified **** ysis showed 74.8% efficacy and did meet that threshold.
Valneva SE (NASDAQ:VALN), the smallest of the two partners, views the vaccine as a clean competitive setup. According to the company, PF-07307405 is the most advanced Lyme disease vaccine candidate currently in clinical development, a rare spot in the vaccine industry where new entrants often face competition from existing treatments. Under the terms of the 2020 partnership and license agreement, Pfizer Inc. (NYSE:PFE) will have exclusive rights to produce and commercialize the vaccine if it is approved, while Valneva SE (NASDAQ:VALN) will benefit as a development partner.
The institutional stance is very different between the two companies, reflecting their very different sizes. Pfizer Inc. (NYSE:PFE) is still a strong name in the institutional **** e, with hedge fund ownership stable at 83 funds in the second quarter of 2026, the same as the first quarter, reflecting its position as a large, diversified pharmaceutical holding, rather than a name driven by a specific pipeline event. Valneva SE (NASDAQ:VALN), however, has little hedge fund exposure, with only 4 funds holding a position in the second quarter, up from 1 in the first quarter, reflecting the continued lack of visibility of the smaller partner among institutional investors.
#disease
For a vaccine candidate first proposed in a 2020 collaboration deal between Pfizer Inc. (NYSE:PFE) and French biotech Valneva SE (NASDAQ:VALN), this represents the formal transition from years of clinical development into European regulatory review.
The application is based on the Phase 3 VALOR trial, a placebo-controlled, randomized study of 9,437 participants aged five and older from high-incidence Lyme disease locations in US, Canada, and Europe. Participants got four doses on a phased schedule: one at months 0, 2, and 5-9, followed by a fourth dosage around a year later, shortly before the start of the next Lyme season. Topline data released in March 2026 demonstrated efficacy of over 70% in reducing confirmed Lyme disease cases, with the vaccine generally tolerated and no safety issues detected. However, the statistical picture was less clean than the headline efficacy suggests. The first prespecified **** ysis, which served as the primary endpoint, showed 73.2% efficacy but failed the trial's predefined statistical criterion because the lower bound of the 95% confidence interval was 15.8%, below the required 20%. A second prespecified **** ysis showed 74.8% efficacy and did meet that threshold.
Valneva SE (NASDAQ:VALN), the smallest of the two partners, views the vaccine as a clean competitive setup. According to the company, PF-07307405 is the most advanced Lyme disease vaccine candidate currently in clinical development, a rare spot in the vaccine industry where new entrants often face competition from existing treatments. Under the terms of the 2020 partnership and license agreement, Pfizer Inc. (NYSE:PFE) will have exclusive rights to produce and commercialize the vaccine if it is approved, while Valneva SE (NASDAQ:VALN) will benefit as a development partner.
The institutional stance is very different between the two companies, reflecting their very different sizes. Pfizer Inc. (NYSE:PFE) is still a strong name in the institutional **** e, with hedge fund ownership stable at 83 funds in the second quarter of 2026, the same as the first quarter, reflecting its position as a large, diversified pharmaceutical holding, rather than a name driven by a specific pipeline event. Valneva SE (NASDAQ:VALN), however, has little hedge fund exposure, with only 4 funds holding a position in the second quarter, up from 1 in the first quarter, reflecting the continued lack of visibility of the smaller partner among institutional investors.
#disease
2 months ago
