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Side-by-side financial comparison of FUELCELL ENERGY INC (FCEL) and X4 Pharmaceuticals, Inc (XFOR). Click either name above to swap in a different company.

FUELCELL ENERGY INC is the larger business by last-quarter revenue ($55.0M vs $28.8M, roughly 1.9× X4 Pharmaceuticals, Inc). X4 Pharmaceuticals, Inc runs the higher net margin — 1.0% vs -54.3%, a 55.3% gap on every dollar of revenue.

FuelCell Energy, Inc. is a publicly traded fuel cell company headquartered in Danbury, Connecticut. It designs, manufactures, operates and services power plants based on molten carbonate fuel cells.

X4 Pharmaceuticals, Inc. is a clinical-stage biotechnology company focused on developing novel targeted therapies for rare immunological diseases and oncology indications with high unmet medical needs. It operates primarily across the U.S. and European markets, with a lead pipeline candidate for WHIM syndrome and multiple other preclinical and clinical assets for immune disorders and cancer.

FCEL vs XFOR — Head-to-Head

Bigger by revenue
FCEL
FCEL
1.9× larger
FCEL
$55.0M
$28.8M
XFOR
Higher net margin
XFOR
XFOR
55.3% more per $
XFOR
1.0%
-54.3%
FCEL

Income Statement — Q4 FY2025 vs Q1 FY2025

Metric
FCEL
FCEL
XFOR
XFOR
Revenue
$55.0M
$28.8M
Net Profit
$-29.9M
$282.0K
Gross Margin
-12.1%
83.6%
Operating Margin
-51.5%
-32.8%
Net Margin
-54.3%
1.0%
Revenue YoY
11.5%
Net Profit YoY
27.9%
100.5%
EPS (diluted)
$-0.43
$0.04

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
FCEL
FCEL
XFOR
XFOR
Q4 25
$55.0M
Q3 25
$46.7M
Q2 25
$37.4M
Q1 25
$19.0M
$28.8M
Q4 24
$49.3M
Q3 24
$23.7M
Q2 24
$22.4M
Q1 24
$16.7M
$0
Net Profit
FCEL
FCEL
XFOR
XFOR
Q4 25
$-29.9M
Q3 25
$-91.7M
Q2 25
$-38.0M
Q1 25
$-28.3M
$282.0K
Q4 24
$-41.4M
Q3 24
$-32.7M
Q2 24
$-32.1M
Q1 24
$-19.8M
$-51.8M
Gross Margin
FCEL
FCEL
XFOR
XFOR
Q4 25
-12.1%
Q3 25
-11.0%
Q2 25
-25.2%
Q1 25
-27.4%
83.6%
Q4 24
-22.1%
Q3 24
-26.2%
Q2 24
-31.6%
Q1 24
-70.2%
Operating Margin
FCEL
FCEL
XFOR
XFOR
Q4 25
-51.5%
Q3 25
-204.0%
Q2 25
-95.7%
Q1 25
-172.9%
-32.8%
Q4 24
-83.2%
Q3 24
-141.9%
Q2 24
-184.5%
Q1 24
-254.5%
Net Margin
FCEL
FCEL
XFOR
XFOR
Q4 25
-54.3%
Q3 25
-196.1%
Q2 25
-101.7%
Q1 25
-149.1%
1.0%
Q4 24
-84.0%
Q3 24
-137.8%
Q2 24
-143.4%
Q1 24
-118.6%
EPS (diluted)
FCEL
FCEL
XFOR
XFOR
Q4 25
$-0.43
Q3 25
$-3.78
Q2 25
$-1.79
Q1 25
$-1.42
$0.04
Q4 24
$-2.29
Q3 24
$-1.99
Q2 24
$-2.18
Q1 24
$-1.37
$-7.77

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
FCEL
FCEL
XFOR
XFOR
Cash + ST InvestmentsLiquidity on hand
$278.1M
$40.3M
Total DebtLower is stronger
$103.8M
$75.0M
Stockholders' EquityBook value
$662.2M
$22.9M
Total Assets
$932.1M
$130.0M
Debt / EquityLower = less leverage
0.16×
3.27×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
FCEL
FCEL
XFOR
XFOR
Q4 25
$278.1M
Q3 25
$174.7M
Q2 25
$177.0M
Q1 25
$208.4M
$40.3M
Q4 24
$257.3M
Q3 24
$267.2M
Q2 24
$260.1M
Q1 24
$297.5M
$60.5M
Total Debt
FCEL
FCEL
XFOR
XFOR
Q4 25
$103.8M
Q3 25
$106.4M
Q2 25
$109.4M
Q1 25
$112.3M
$75.0M
Q4 24
$115.7M
Q3 24
$112.7M
Q2 24
$116.2M
Q1 24
$107.2M
$55.0M
Stockholders' Equity
FCEL
FCEL
XFOR
XFOR
Q4 25
$662.2M
Q3 25
$556.2M
Q2 25
$609.2M
Q1 25
$635.2M
$22.9M
Q4 24
$656.9M
Q3 24
$675.8M
Q2 24
$639.8M
Q1 24
$663.9M
$1.0M
Total Assets
FCEL
FCEL
XFOR
XFOR
Q4 25
$932.1M
Q3 25
$830.5M
Q2 25
$883.8M
Q1 25
$907.5M
$130.0M
Q4 24
$944.1M
Q3 24
$948.9M
Q2 24
$916.8M
Q1 24
$923.2M
$112.2M
Debt / Equity
FCEL
FCEL
XFOR
XFOR
Q4 25
0.16×
Q3 25
0.19×
Q2 25
0.18×
Q1 25
0.18×
3.27×
Q4 24
0.18×
Q3 24
0.17×
Q2 24
0.18×
Q1 24
0.16×
53.09×

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
FCEL
FCEL
XFOR
XFOR
Operating Cash FlowLast quarter
$-22.9M
$-12.4M
Free Cash FlowOCF − Capex
$-23.9M
FCF MarginFCF / Revenue
-43.4%
Capex IntensityCapex / Revenue
1.8%
0.0%
Cash ConversionOCF / Net Profit
-43.86×
TTM Free Cash FlowTrailing 4 quarters
$-143.9M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
FCEL
FCEL
XFOR
XFOR
Q4 25
$-22.9M
Q3 25
$-26.8M
Q2 25
$-29.9M
Q1 25
$-45.7M
$-12.4M
Q4 24
$5.8M
Q3 24
$-63.4M
Q2 24
$-37.1M
Q1 24
$-58.3M
$-33.6M
Free Cash Flow
FCEL
FCEL
XFOR
XFOR
Q4 25
$-23.9M
Q3 25
$-32.1M
Q2 25
$-35.2M
Q1 25
$-52.8M
Q4 24
$-4.7M
Q3 24
$-76.8M
Q2 24
$-50.3M
Q1 24
$-68.8M
$-33.7M
FCF Margin
FCEL
FCEL
XFOR
XFOR
Q4 25
-43.4%
Q3 25
-68.6%
Q2 25
-94.0%
Q1 25
-277.8%
Q4 24
-9.5%
Q3 24
-324.0%
Q2 24
-224.5%
Q1 24
-412.4%
Capex Intensity
FCEL
FCEL
XFOR
XFOR
Q4 25
1.8%
Q3 25
11.2%
Q2 25
14.1%
Q1 25
37.2%
0.0%
Q4 24
21.4%
Q3 24
56.6%
Q2 24
58.9%
Q1 24
63.3%
Cash Conversion
FCEL
FCEL
XFOR
XFOR
Q4 25
Q3 25
Q2 25
Q1 25
-43.86×
Q4 24
Q3 24
Q2 24
Q1 24

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

Revenue Breakdown by Segment

FCEL
FCEL

Other$30.0M55%
Electricity Generation$12.2M22%
Services$7.3M13%
Advanced Technologies$5.5M10%

XFOR
XFOR

Segment breakdown not available.

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