Bayer up 11% on asundexian’s Phase III triumph

24 November 2025

Germany’s Bayer (BAYN: DE) has announced positive top-line results from the global Phase III study OCEANIC-STROKE, with its investigational, once daily, oral FXIa inhibitor asundexian.

Shares in Bayer were around 11% higher at lunchtime on Monday, when the results were announced.

The study met its primary efficacy and safety endpoints. Asundexian 50mg once daily significantly reduced the risk of ischemic stroke compared to placebo, both in combination with antiplatelet therapy, in patients after a non-cardioembolic ischemic stroke or high-risk ischemic attack. 

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