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Upstream Bio, Inc. (UPB) Stock Fundamental Analysis & AI Rating 2026

UPB Nasdaq Pharmaceutical Preparations DE CIK: 0002022626
Recently Updated • Analysis: Apr 18, 2026 • SEC Data: 2025-12-31
SELL
65% Conf
Pending
Analysis scheduled

📊 UPB Key Takeaways

Revenue: $2.9M
Net Margin: -5,026.0%
Free Cash Flow: $-133.4M
Current Ratio: 26.15x
Debt/Equity: 0.00x
EPS: $-2.66
AI Rating: SELL with 65% confidence
Upstream Bio, Inc. (UPB) receives a SELL rating with 65% confidence from our AI fundamental analysis based on SEC 10-K filings. With revenue of $2.9M, net profit margin of -5,026.0%, and return on equity (ROE) of -42.2%, Upstream Bio, Inc. demonstrates mixed fundamentals in the Healthcare sector. Below is our complete UPB stock analysis for 2026.

Is Upstream Bio, Inc. (UPB) a Good Investment?

Claude

Upstream Bio is a pre-commercial stage biotech company with minimal revenue ($2.9M) facing unsustainable cash burn of $133.3M annually, providing less than 10 months of runway at current burn rates. While the balance sheet is fortress-like with $101.6M cash and minimal debt, the company will require significant capital raises (causing shareholder dilution) or dramatic revenue acceleration to survive, with no clear path to profitability evident from financial data alone.

Why Buy Upstream Bio, Inc. Stock? UPB Key Strengths

Claude
  • + Strong balance sheet with $339.8M stockholders equity and only $14.0M liabilities
  • + Excellent liquidity position with 26.15x current ratio and $101.6M cash reserves
  • + Early revenue traction showing 20.4% year-over-year growth from $2.9M base

UPB Stock Risks: Upstream Bio, Inc. Investment Risks

Claude
  • ! Unsustainable cash burn of $133.3M annually against only $2.9M revenue, providing <10 months of runway
  • ! Imminent capital raise requirement will cause significant shareholder dilution
  • ! Massive operating losses (-$160.4M) and -5618.8% operating margin with no profitability timeline disclosed

Key Metrics to Watch

Claude
  • * Monthly cash burn rate and cash runway remaining
  • * Revenue growth trajectory and path to profitability
  • * Clinical pipeline advancement and regulatory milestones for product candidates

Upstream Bio, Inc. (UPB) Financial Metrics & Key Ratios

Revenue
$2.9M
Net Income
$-143.4M
EPS (Diluted)
$-2.66
Free Cash Flow
$-133.4M
Total Assets
$353.8M
Cash Position
$101.6M

💡 AI Analyst Insight

Strong liquidity with a 26.15x current ratio provides a solid financial cushion.

UPB Profit Margin, ROE & Profitability Analysis

Gross Margin N/A
Operating Margin -5,618.8%
Net Margin -5,026.0%
ROE -42.2%
ROA -40.5%
FCF Margin -4,675.5%

UPB vs Healthcare Sector: How Upstream Bio, Inc. Compares

How Upstream Bio, Inc. compares to Healthcare sector averages

Net Margin
UPB -5,026.0%
vs
Sector Avg 12.0%
UPB Sector
ROE
UPB -42.2%
vs
Sector Avg 15.0%
UPB Sector
Current Ratio
UPB 26.2x
vs
Sector Avg 2.0x
UPB Sector
Debt/Equity
UPB 0.0x
vs
Sector Avg 0.6x
UPB Sector

Sector benchmarks are approximate industry averages. Actual sector performance may vary.

Is Upstream Bio, Inc. Stock Overvalued? UPB Valuation Analysis 2026

Based on fundamental analysis, Upstream Bio, Inc. has mixed fundamental signals relative to the Healthcare sector in 2026.

Return on Equity
-42.2%
Sector avg: 15%
Net Profit Margin
-5,026.0%
Sector avg: 12%
Revenue Growth
N/A
Year-over-year
Debt/Equity
0.00x
Sector avg: 0.6x

Note: This is a fundamental analysis based on SEC filings. For P/E ratio, price targets, and market-based valuation, consult financial data providers. This is not investment advice.

Upstream Bio, Inc. Balance Sheet: UPB Debt, Cash & Liquidity

Current Ratio
26.15x
Quick Ratio
26.15x
Debt/Equity
0.00x
Debt/Assets
4.0%
Interest Coverage
N/A
Long-term Debt
N/A

UPB Revenue & Earnings Growth: 5-Year Financial Trend

UPB 5-year financial data: Year 2024: Revenue $2.4M, Net Income -$20.5M, EPS $-12.95. Year 2025: Revenue $2.9M, Net Income -$62.8M, EPS $-5.58.
Revenue
Net Income
EPS (right axis)

5-Year Trend Summary: Upstream Bio, Inc.'s revenue has grown significantly by 20% over the 5-year period, indicating strong business expansion. The most recent EPS of $-5.58 indicates the company is currently unprofitable.

UPB Revenue Growth, EPS Growth & YoY Performance

Revenue Growth
N/A
Year-over-year
Net Income Growth
N/A
Year-over-year
EPS Growth
N/A
Earnings per share
FCF Margin
-4,675.5%
Free cash flow / Revenue

UPB Quarterly Earnings & Performance

Quarterly financial performance data for Upstream Bio, Inc. including revenue, net income, and earnings per share.
Quarter Revenue Net Income EPS
Q3 2025 $607.0K -$10.9M $-0.63
Q2 2025 $510.0K -$10.9M $-0.74
Q1 2025 $566.0K -$10.9M $-0.51
Q3 2024 $607.0K -$2.5M $-2.11

Data sourced from SEC EDGAR 10-Q quarterly filings. Figures may represent quarterly or cumulative values.

Upstream Bio, Inc. Dividends, Buybacks & Capital Allocation

Operating Cash Flow
-$133.3M
Cash generated from operations
Capital Expenditures
$165.0K
Investment in assets
Dividends
None
No dividend program

UPB SEC Filings: Latest 10-K & 10-Q Analysis

Access official SEC EDGAR filings for Upstream Bio, Inc. (CIK: 0002022626)

📋 Recent SEC Filings

Date Form Document Action
Apr 16, 2026 DEF 14A upb-20260416.htm View →
Mar 26, 2026 8-K d110609d8k.htm View →
Mar 26, 2026 10-K upb-20251231.htm View →
Mar 26, 2026 8-K upb-20260326.htm View →
Mar 17, 2026 4 xslF345X05/ownership.xml View →

Frequently Asked Questions about UPB

What is the AI rating for UPB?

Upstream Bio, Inc. (UPB) has an AI rating of SELL with 65% confidence, based on fundamental analysis of SEC EDGAR filings.

What are UPB's key strengths?

Claude: Strong balance sheet with $339.8M stockholders equity and only $14.0M liabilities. Excellent liquidity position with 26.15x current ratio and $101.6M cash reserves.

What are the risks of investing in UPB?

Claude: Unsustainable cash burn of $133.3M annually against only $2.9M revenue, providing <10 months of runway. Imminent capital raise requirement will cause significant shareholder dilution.

What is UPB's revenue and growth?

Upstream Bio, Inc. reported revenue of $2.9M.

Does UPB pay dividends?

Upstream Bio, Inc. does not currently pay dividends.

Where can I find UPB SEC filings?

Official SEC filings for Upstream Bio, Inc. (CIK: 0002022626) including 10-K, 10-Q, and 8-K reports are available on SEC EDGAR.

What is UPB's EPS?

Upstream Bio, Inc. has a diluted EPS of $-2.66.

How is the AI analysis conducted?

Two independent AI systems — Claude (Anthropic) and ChatGPT (OpenAI) — analyze SEC EDGAR filings including 10-K annual reports and 10-Q quarterly reports. Each AI evaluates financial health, profitability ratios, balance sheet strength, and growth metrics. The combined rating reflects both perspectives for balanced insights.

Is UPB a good stock to buy right now?

Based on our AI fundamental analysis in April 2026, Upstream Bio, Inc. has a SELL rating with 65% confidence. Review the strengths and risks sections above before making a decision. This is not investment advice.

Is UPB stock overvalued or undervalued?

Valuation metrics for UPB: ROE of -42.2% (sector avg: 15%), net margin of -5,026.0% (sector avg: 12%). Compare these metrics with sector averages to assess valuation.

Should I buy UPB stock in 2026?

Our dual AI analysis gives Upstream Bio, Inc. a combined SELL rating for 2026. Revenue is data pending, with profitability at or below sector average. Always conduct your own research.

What is UPB's free cash flow?

Upstream Bio, Inc.'s operating cash flow is $-133.3M, with capital expenditures of $165.0K. FCF margin is -4,675.5%.

How does UPB compare to other Healthcare stocks?

Vs Healthcare sector averages: Net margin -5,026.0% (avg: 12%), ROE -42.2% (avg: 15%), current ratio 26.15 (avg: 2).

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Disclaimer: This analysis is generated by Claude AI (Anthropic) and ChatGPT (OpenAI) based on publicly available SEC EDGAR filings. It does not include stock price data and should not be considered financial advice. All fundamental data is sourced from SEC public domain filings. Always conduct your own research and consult with a qualified financial advisor before making investment decisions.
Data Source: SEC EDGAR | Analysis Date: Apr 18, 2026 | Data as of: 2025-12-31 | Powered by Claude AI