In a battle with Bristol Myers Squibb/Johnson & Johnson, Bayer and privately held Anthos to bring the first factor XI anticoagulant product to market, Regeneron reported on 19 December that its pair of factor XI-targeted antibodies succeeded in Phase II studies and are expected to advance into Phase III in 2025.
Regeneron Will Move Two Factor XI Agents Into Phase III
With successful Phase II data versus active comparators for both REGN7508 and REGN9933, Regeneron hopes to position the candidates to compete against existing factor X products.

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