Upstream Bio (UPB) Shares Outstanding (Diluted Average) (2023 - 2026)

Upstream Bio's Shares Outstanding (Diluted Average) history runs 4 years deep, the most recent figure standing at $54.3 million for Q1 2026.

• In Q1 2026, Shares Outstanding (Diluted Average) rose 1.33% year-over-year to $54.3 million; the TTM figure through Mar 2026 stood at $54.3 million (up 1.33% YoY), while the FY2025 annual figure was $53.9 million, up 293.59% from the prior year.
• Shares Outstanding (Diluted Average) was $54.3 million for Q1 2026 at Upstream Bio, up from $53.9 million in the prior quarter.
• In the past five years, Shares Outstanding (Diluted Average) ranged from a high of $54.3 million in Q1 2026 to a low of $2.9 million in Q3 2023.
• Historically, Shares Outstanding (Diluted Average) has averaged $27.1 million across 4 years, with a median of $13.7 million in 2024.
• The sharpest annual moves came in 2025 and 2026: Shares Outstanding (Diluted Average) jumped 1689.88% in 2025, then advanced 1.33% in 2026.
• A 4-year view of Shares Outstanding (Diluted Average) shows it stood at $3.0 million in 2023, then surged by 363.22% to $13.7 million in 2024, then jumped by 293.59% to $53.9 million in 2025, then climbed by 0.89% to $54.3 million in 2026.
• The last three Shares Outstanding (Diluted Average) figures came in at $54.3 million (Q1 2026), $53.9 million (Q4 2025), and $53.9 million (Q3 2025), per Business Quant data.