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Side-by-side financial comparison of Amprius Technologies, Inc. (AMPX) and ASP Isotopes Inc. (ASPI). Click either name above to swap in a different company.

Amprius Technologies, Inc. is the larger business by last-quarter revenue ($25.2M vs $16.7M, roughly 1.5× ASP Isotopes Inc.). On growth, ASP Isotopes Inc. posted the faster year-over-year revenue change (1295.7% vs 137.4%). Amprius Technologies, Inc. produced more free cash flow last quarter ($-5.9M vs $-47.4M).

Amprius Technologies, Inc. develops and manufactures high-energy density lithium-ion batteries using proprietary silicon anode technology. It serves aerospace, defense, electric mobility, and portable electronics segments, offering products with longer runtime and faster charging than conventional alternatives.

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.

AMPX vs ASPI — Head-to-Head

Bigger by revenue
AMPX
AMPX
1.5× larger
AMPX
$25.2M
$16.7M
ASPI
Growing faster (revenue YoY)
ASPI
ASPI
+1158.3% gap
ASPI
1295.7%
137.4%
AMPX
More free cash flow
AMPX
AMPX
$41.6M more FCF
AMPX
$-5.9M
$-47.4M
ASPI

Income Statement — Q4 FY2025 vs Q4 FY2025

Metric
AMPX
AMPX
ASPI
ASPI
Revenue
$25.2M
$16.7M
Net Profit
$-24.4M
Gross Margin
23.6%
12.5%
Operating Margin
-100.9%
Net Margin
-96.7%
Revenue YoY
137.4%
1295.7%
Net Profit YoY
-113.6%
-586.8%
EPS (diluted)
$-0.19

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
AMPX
AMPX
ASPI
ASPI
Q4 25
$25.2M
$16.7M
Q3 25
$21.4M
$4.9M
Q2 25
$15.1M
Q1 25
$11.3M
Q4 24
$10.6M
Q3 24
$7.9M
Q2 24
$3.3M
Q1 24
$2.3M
Net Profit
AMPX
AMPX
ASPI
ASPI
Q4 25
$-24.4M
Q3 25
$-3.9M
$-12.9M
Q2 25
$-6.4M
Q1 25
$-9.4M
Q4 24
$-11.4M
Q3 24
$-10.8M
Q2 24
$-12.5M
Q1 24
$-9.9M
Gross Margin
AMPX
AMPX
ASPI
ASPI
Q4 25
23.6%
12.5%
Q3 25
15.5%
8.7%
Q2 25
8.9%
Q1 25
-20.9%
Q4 24
-21.2%
Q3 24
-64.9%
Q2 24
-195.2%
Q1 24
Operating Margin
AMPX
AMPX
ASPI
ASPI
Q4 25
-100.9%
Q3 25
-21.9%
-306.1%
Q2 25
-45.2%
Q1 25
-85.7%
Q4 24
-110.6%
Q3 24
-143.3%
Q2 24
-386.6%
Q1 24
-441.7%
Net Margin
AMPX
AMPX
ASPI
ASPI
Q4 25
-96.7%
Q3 25
-18.2%
-263.7%
Q2 25
-42.3%
Q1 25
-83.0%
Q4 24
-107.4%
Q3 24
-138.1%
Q2 24
-374.2%
Q1 24
-423.2%
EPS (diluted)
AMPX
AMPX
ASPI
ASPI
Q4 25
$-0.19
Q3 25
$-0.03
$-0.15
Q2 25
$-0.05
Q1 25
$-0.08
Q4 24
$-0.11
Q3 24
$-0.10
Q2 24
$-0.13
Q1 24
$-0.11

Balance Sheet & Financial Strength

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

Metric
AMPX
AMPX
ASPI
ASPI
Cash + ST InvestmentsLiquidity on hand
$90.5M
$333.3M
Total DebtLower is stronger
$14.4M
Stockholders' EquityBook value
$103.8M
$204.2M
Total Assets
$156.9M
$498.0M
Debt / EquityLower = less leverage
0.07×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
AMPX
AMPX
ASPI
ASPI
Q4 25
$90.5M
$333.3M
Q3 25
$73.2M
$113.9M
Q2 25
$54.2M
Q1 25
$48.4M
Q4 24
$55.2M
Q3 24
$35.0M
Q2 24
$46.4M
Q1 24
$39.0M
Total Debt
AMPX
AMPX
ASPI
ASPI
Q4 25
$14.4M
Q3 25
$13.9M
Q2 25
Q1 25
Q4 24
Q3 24
Q2 24
Q1 24
Stockholders' Equity
AMPX
AMPX
ASPI
ASPI
Q4 25
$103.8M
$204.2M
Q3 25
$103.2M
$74.1M
Q2 25
$76.7M
Q1 25
$70.4M
Q4 24
$69.5M
Q3 24
$56.0M
Q2 24
$65.1M
Q1 24
$59.9M
Total Assets
AMPX
AMPX
ASPI
ASPI
Q4 25
$156.9M
$498.0M
Q3 25
$156.5M
$225.9M
Q2 25
$123.0M
Q1 25
$118.5M
Q4 24
$121.1M
Q3 24
$104.2M
Q2 24
$112.8M
Q1 24
$104.7M
Debt / Equity
AMPX
AMPX
ASPI
ASPI
Q4 25
0.07×
Q3 25
0.19×
Q2 25
Q1 25
Q4 24
Q3 24
Q2 24
Q1 24

Cash Flow & Capital Efficiency

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

Metric
AMPX
AMPX
ASPI
ASPI
Operating Cash FlowLast quarter
$-3.5M
$-37.8M
Free Cash FlowOCF − Capex
$-5.9M
$-47.4M
FCF MarginFCF / Revenue
-23.2%
-284.7%
Capex IntensityCapex / Revenue
9.3%
57.9%
Cash ConversionOCF / Net Profit
TTM Free Cash FlowTrailing 4 quarters
$-35.5M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
AMPX
AMPX
ASPI
ASPI
Q4 25
$-3.5M
$-37.8M
Q3 25
$-9.2M
$-8.9M
Q2 25
$-4.3M
Q1 25
$-14.1M
Q4 24
$-6.1M
Q3 24
$-9.5M
Q2 24
$-8.0M
Q1 24
$-9.8M
Free Cash Flow
AMPX
AMPX
ASPI
ASPI
Q4 25
$-5.9M
$-47.4M
Q3 25
$-9.7M
$-12.0M
Q2 25
$-5.0M
Q1 25
$-15.0M
Q4 24
$-9.7M
Q3 24
$-10.9M
Q2 24
$-9.6M
Q1 24
$-13.7M
FCF Margin
AMPX
AMPX
ASPI
ASPI
Q4 25
-23.2%
-284.7%
Q3 25
-45.1%
-245.5%
Q2 25
-33.1%
Q1 25
-133.3%
Q4 24
-91.4%
Q3 24
-138.3%
Q2 24
-285.9%
Q1 24
-585.4%
Capex Intensity
AMPX
AMPX
ASPI
ASPI
Q4 25
9.3%
57.9%
Q3 25
1.9%
64.4%
Q2 25
4.8%
Q1 25
8.1%
Q4 24
34.1%
Q3 24
17.0%
Q2 24
48.0%
Q1 24
166.8%

Financial Flow Comparison

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

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