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Friday, November 13, 2026

Windward Bio Nasdaq debut after $17 IPO lifts WWB 37%

Windward Bio Nasdaq debut after $17 IPO lifts WWB 37% in first session

  • Windward Bio priced 10.3 million shares at $17 on Nov 12, raising $175 million plus $50 million from Sanofi.
  • Shares opened at $18.35 on Nov 13, then rallied to $23.24 by 13:01 ET, up 27% from the open.
  • Reuters reported the debut valued the Novo Holdings-backed biotech at about $1.07 billion.
  • Lead asset WIN378 is a twice-yearly TSLP antibody for asthma and COPD, versus monthly Tezspire.
  • Sanofi bought additional shares and warrants in a concurrent private placement.
  • September interim Phase 2 asthma data and CEO Luca Santarelli’s prior exits supported demand.

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