Upstream Bio launches at-the-market offering of up to $150M common stock at $8.45/share

Filed March 26, 2026 · ~1 min read

Key Changes

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  Upstream Bio is offering up to $150 million of common stock via an at-the-market program, with shares sold at prevailing market prices.

  The Offering verify on EDGAR →
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  The offering price is $8.45 per share, the last reported sale price on Nasdaq on March 24, 2026.

  The Offering verify on EDGAR →
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  Implied post-offering market capitalization is $608.3 million, based on 71,989,229 shares outstanding after the offering.

  The Offering verify on EDGAR →