TickerFacts.

Upstream Bio, Inc. (UPB): Weighted Average Diluted Shares

Annual figures by period end, from SEC filings.

53.85M
Year ended 2025-12-31
2023-12-31: 2.95M2024-12-31: 13.68M2025-12-31: 53.85M53.85M
2023-12-31 Weighted Average Diluted Shares (shares) 2025-12-31
Period endedWeighted Average Diluted SharesChange YoYSource filing
2025-12-3153.85M+293.6%2026-03-26, From 2025-01-01
2024-12-3113.68M+363.2%2026-03-26, From 2024-01-01
2023-12-312.95Mn/a2025-03-12, From 2023-01-01