Quick Answer
Upstream Bio, Inc. reported Common Stock Shares Outstanding of 54.24 million shares for the year ending 2025.
- Upstream Bio, Inc. showed an increase of +1.2% in Common Stock Shares Outstanding from 2024 to 2025.
- This data is from Upstream Bio, Inc.'s annual report (Form 10-K), filed with the SEC on March 26, 2026.
- XBRL data for this metric is available from 2023 to 2025 (3 years of filings). Earlier data may not exist in machine-readable XBRL format as companies adopted electronic filing at different times.
- Over the full 3 years of available data (2023 to 2025), Upstream Bio, Inc.'s Common Stock Shares Outstanding has grown by 1,712.5%.
- Historical annual values: Fiscal year 2025: 54.24 million shares | Fiscal year 2024: 53.60 million shares | Fiscal year 2023: 2.99 million shares.
- Data sourced from SEC EDGAR public filings as of June 24, 2026.
Last verified: