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

UPB Nasdaq Pharmaceutical Preparations DE CIK: 0002022626
Updated This Month • Analysis: May 14, 2026 • SEC Data: 2026-03-31
Combined AI Grade
B
65% Confidence
N/A
B
65% Conf
Pending
Analysis scheduled

📊 UPB Key Takeaways

Revenue: $1.0M
Net Margin: -3,925.6%
Free Cash Flow: $-48.0M
Current Ratio: 23.14x
Debt/Equity: 0.00x
EPS: $-0.75
AI Grade: B with 65% confidence
Upstream Bio, Inc. (UPB) receives a B fundamental grade with 65% confidence from our AI analysis based on SEC 10-K filings. With revenue of $1.0M, net profit margin of -3,925.6%, and return on equity (ROE) of -13.4%, 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 development-stage pharmaceutical company with a fortress balance sheet ($96.7M cash, minimal debt) providing downside protection, but severe operating losses ($43.6M) against minimal revenue ($1.0M) create existential burn risk. With annual negative cash flow of $48M, the company has approximately 2 years of runway to achieve clinical or commercial milestones before requiring capital raises.

Upstream Bio, Inc. Key Strengths (UPB)

Claude
  • + Strong balance sheet with $96.7M cash reserves and only $14.1M total liabilities
  • + Zero long-term debt eliminates financial distress risk in near term
  • + Exceptional liquidity position (23.14x current ratio) supports extended operations
  • + Revenue growth of 20.4% YoY indicates emerging commercial traction despite early stage

UPB Stock Risks: Upstream Bio, Inc. Investment Risks

Claude
  • ! Operating losses of $43.6M against $1.0M revenue indicates severe unprofitability and pre-revenue stage
  • ! Negative free cash flow of $48M annually with only $96.7M runway (~2 years at current burn)
  • ! Pharmaceutical development carries high clinical, regulatory, and execution risk with uncertain outcomes
  • ! Heavy R&D burn model typical of biotech requires successful commercialization or significant capital raises

Key Metrics to Watch

Claude
  • * Operating cash flow trajectory and path to cash flow breakeven
  • * Clinical trial advancement, regulatory approvals, and drug development pipeline milestones
  • * Revenue growth rate from product commercialization or licensing revenues

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

Revenue
$1.0M
Net Income
$-40.6M
EPS (Diluted)
$-0.75
Free Cash Flow
$-48.0M
Total Assets
$318.1M
Cash Position
$96.7M

💡 AI Analyst Insight

Strong liquidity with a 23.14x current ratio provides a solid financial cushion.

UPB Profit Margin, ROE & Profitability Analysis

Gross Margin N/A
Operating Margin -4,218.1%
Net Margin -3,925.6%
ROE -13.4%
ROA -12.8%
FCF Margin -4,643.8%

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

How Upstream Bio, Inc. compares to Healthcare sector averages

Net Margin
UPB -3,925.6%
vs
Sector Avg 12.0%
UPB Sector
ROE
UPB -13.4%
vs
Sector Avg 15.0%
UPB Sector
Current Ratio
UPB 23.1x
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
-13.4%
Sector avg: 15%
Net Profit Margin
-3,925.6%
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
23.14x
Quick Ratio
23.14x
Debt/Equity
0.00x
Debt/Assets
4.4%
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
-4,643.8%
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
Q1 2026 $566.0K -$27.3M $-0.51
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
-$47.9M
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
May 13, 2026 10-Q upb-20260331.htm View →
May 13, 2026 8-K upb-20260513.htm View →
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 →

Frequently Asked Questions about UPB

What is the AI rating for UPB?

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

What are UPB's key strengths?

Claude: Strong balance sheet with $96.7M cash reserves and only $14.1M total liabilities. Zero long-term debt eliminates financial distress risk in near term.

What are the risks of investing in UPB?

Claude: Operating losses of $43.6M against $1.0M revenue indicates severe unprofitability and pre-revenue stage. Negative free cash flow of $48M annually with only $96.7M runway (~2 years at current burn).

What is UPB's revenue and growth?

Upstream Bio, Inc. reported revenue of $1.0M.

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 $-0.75.

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 grade reflects both perspectives for balanced insights.

What is UPB's fundamental grade?

Based on our AI fundamental analysis in June 2026, Upstream Bio, Inc. has a B grade with 65% confidence. Review the strengths and risks sections above for full context. This is not investment advice.

Is UPB stock overvalued or undervalued?

Valuation metrics for UPB: ROE of -13.4% (sector avg: 15%), net margin of -3,925.6% (sector avg: 12%). Compare these metrics with sector averages to assess valuation.

What is UPB's AI grade for 2026?

Our dual AI analysis gives Upstream Bio, Inc. a combined B grade 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 $-47.9M, with capital expenditures of $165.0K. FCF margin is -4,643.8%.

How does UPB compare to other Healthcare stocks?

Vs Healthcare sector averages: Net margin -3,925.6% (avg: 12%), ROE -13.4% (avg: 15%), current ratio 23.14 (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: May 14, 2026 | Data as of: 2026-03-31 | Powered by Claude AI