8-K current report · filed Jun 10, 2026

Upstream Bio, Inc. (UPB) 8-K Current Report: June 10, 2026

Short answer

Upstream Bio, Inc. (UPB) filed an 8-K current report with the SEC on June 10, 2026 reporting Item 5.07 (Submission of Matters to a Vote of Security Holders). 48,100,767 shares represented, establishing a quorum from 54,419,986 shares outstanding.

Upstream Bio, Inc. 8-K event analysis

AI summary of each reported item and its exhibits

Item 5.07 · Submission of Matters to a Vote of Security Holders

  • 48,100,767 shares represented, establishing a quorum from 54,419,986 shares outstanding
  • Class II directors Fleming and Ratcliffe elected through the 2029 annual meeting
  • Ratcliffe received 43,812,021 votes for; Fleming received 40,715,035
  • PwC appointment ratified for fiscal 2026, with 47,951,313 votes for and 143,251 against

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