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Side-by-side financial comparison of ASP Isotopes Inc. (ASPI) and Pulmonx Corp (LUNG). Click either name above to swap in a different company.

Pulmonx Corp is the larger business by last-quarter revenue ($20.6M vs $16.7M, roughly 1.2× ASP Isotopes Inc.). On growth, ASP Isotopes Inc. posted the faster year-over-year revenue change (1295.7% vs -8.7%).

ASP Isotopes Inc. is a specialty materials firm focused on developing and producing high-purity custom isotopes. Its products serve key sectors including nuclear medicine, targeted cancer therapies, advanced energy, and industrial research, with customers across North America, Europe and Asia Pacific.

Pulmonx Corp is a global medical tech firm focused on interventional pulmonology solutions. It develops minimally invasive endobronchial valves to treat severe COPD and emphysema, with products sold across North America, Europe, and Asia-Pacific for patients with advanced lung conditions.

ASPI vs LUNG — Head-to-Head

Bigger by revenue
LUNG
LUNG
1.2× larger
LUNG
$20.6M
$16.7M
ASPI
Growing faster (revenue YoY)
ASPI
ASPI
+1304.3% gap
ASPI
1295.7%
-8.7%
LUNG

Income Statement — Q4 FY2025 vs Q1 FY2026

Metric
ASPI
ASPI
LUNG
LUNG
Revenue
$16.7M
$20.6M
Net Profit
$-13.7M
Gross Margin
12.5%
77.9%
Operating Margin
-40.9%
Net Margin
-66.3%
Revenue YoY
1295.7%
-8.7%
Net Profit YoY
-586.8%
5.5%
EPS (diluted)
$-0.33

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
ASPI
ASPI
LUNG
LUNG
Q1 26
$20.6M
Q4 25
$16.7M
$22.6M
Q3 25
$4.9M
$21.5M
Q2 25
$23.9M
Q1 25
$22.5M
Q4 24
$23.8M
Q3 24
$20.4M
Q2 24
$20.8M
Net Profit
ASPI
ASPI
LUNG
LUNG
Q1 26
$-13.7M
Q4 25
$-10.4M
Q3 25
$-12.9M
$-14.0M
Q2 25
$-15.2M
Q1 25
$-14.4M
Q4 24
$-13.2M
Q3 24
$-14.1M
Q2 24
$-15.3M
Gross Margin
ASPI
ASPI
LUNG
LUNG
Q1 26
77.9%
Q4 25
12.5%
77.6%
Q3 25
8.7%
74.7%
Q2 25
72.1%
Q1 25
72.5%
Q4 24
74.0%
Q3 24
73.7%
Q2 24
73.7%
Operating Margin
ASPI
ASPI
LUNG
LUNG
Q1 26
-40.9%
Q4 25
-43.8%
Q3 25
-306.1%
-66.9%
Q2 25
-62.0%
Q1 25
-64.6%
Q4 24
-56.5%
Q3 24
-69.3%
Q2 24
-75.2%
Net Margin
ASPI
ASPI
LUNG
LUNG
Q1 26
-66.3%
Q4 25
-46.1%
Q3 25
-263.7%
-64.9%
Q2 25
-63.6%
Q1 25
-64.1%
Q4 24
-55.4%
Q3 24
-69.4%
Q2 24
-73.7%
EPS (diluted)
ASPI
ASPI
LUNG
LUNG
Q1 26
$-0.33
Q4 25
$-0.25
Q3 25
$-0.15
$-0.34
Q2 25
$-0.38
Q1 25
$-0.36
Q4 24
$-0.33
Q3 24
$-0.36
Q2 24
$-0.39

Balance Sheet & Financial Strength

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

Metric
ASPI
ASPI
LUNG
LUNG
Cash + ST InvestmentsLiquidity on hand
$333.3M
$61.6M
Total DebtLower is stronger
$14.4M
$37.3M
Stockholders' EquityBook value
$204.2M
$45.8M
Total Assets
$498.0M
$120.0M
Debt / EquityLower = less leverage
0.07×
0.82×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
ASPI
ASPI
LUNG
LUNG
Q1 26
$61.6M
Q4 25
$333.3M
$69.8M
Q3 25
$113.9M
$76.5M
Q2 25
$75.5M
Q1 25
$74.6M
Q4 24
$70.9M
Q3 24
$63.3M
Q2 24
$63.5M
Total Debt
ASPI
ASPI
LUNG
LUNG
Q1 26
$37.3M
Q4 25
$14.4M
$37.1M
Q3 25
$13.9M
$37.1M
Q2 25
$37.1M
Q1 25
$37.2M
Q4 24
$37.2M
Q3 24
$37.2M
Q2 24
$37.2M
Stockholders' Equity
ASPI
ASPI
LUNG
LUNG
Q1 26
$45.8M
Q4 25
$204.2M
$54.1M
Q3 25
$74.1M
$60.0M
Q2 25
$69.1M
Q1 25
$77.7M
Q4 24
$85.8M
Q3 24
$93.9M
Q2 24
$101.2M
Total Assets
ASPI
ASPI
LUNG
LUNG
Q1 26
$120.0M
Q4 25
$498.0M
$129.3M
Q3 25
$225.9M
$138.3M
Q2 25
$147.2M
Q1 25
$150.7M
Q4 24
$162.8M
Q3 24
$167.4M
Q2 24
$172.6M
Debt / Equity
ASPI
ASPI
LUNG
LUNG
Q1 26
0.82×
Q4 25
0.07×
0.69×
Q3 25
0.19×
0.62×
Q2 25
0.54×
Q1 25
0.48×
Q4 24
0.43×
Q3 24
0.40×
Q2 24
0.37×

Cash Flow & Capital Efficiency

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

Metric
ASPI
ASPI
LUNG
LUNG
Operating Cash FlowLast quarter
$-37.8M
Free Cash FlowOCF − Capex
$-47.4M
FCF MarginFCF / Revenue
-284.7%
Capex IntensityCapex / Revenue
57.9%
Cash ConversionOCF / Net Profit
TTM Free Cash FlowTrailing 4 quarters

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
ASPI
ASPI
LUNG
LUNG
Q1 26
Q4 25
$-37.8M
$-7.1M
Q3 25
$-8.9M
$-8.2M
Q2 25
$-3.9M
Q1 25
$-13.2M
Q4 24
$-6.7M
Q3 24
$-7.2M
Q2 24
$-5.8M
Free Cash Flow
ASPI
ASPI
LUNG
LUNG
Q1 26
Q4 25
$-47.4M
$-7.1M
Q3 25
$-12.0M
$-8.3M
Q2 25
$-4.0M
Q1 25
$-13.5M
Q4 24
$-6.8M
Q3 24
$-7.7M
Q2 24
$-6.2M
FCF Margin
ASPI
ASPI
LUNG
LUNG
Q1 26
Q4 25
-284.7%
-31.4%
Q3 25
-245.5%
-38.4%
Q2 25
-16.6%
Q1 25
-60.0%
Q4 24
-28.8%
Q3 24
-37.6%
Q2 24
-30.0%
Capex Intensity
ASPI
ASPI
LUNG
LUNG
Q1 26
Q4 25
57.9%
0.1%
Q3 25
64.4%
0.4%
Q2 25
0.2%
Q1 25
1.3%
Q4 24
0.5%
Q3 24
2.0%
Q2 24
2.3%

Financial Flow Comparison

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

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