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

FONAR CORP is the larger business by last-quarter revenue ($25.5M vs $16.7M, roughly 1.5× ASP Isotopes Inc.). On growth, ASP Isotopes Inc. posted the faster year-over-year revenue change (1295.7% vs 2.4%). FONAR CORP produced more free cash flow last quarter ($-227.0K vs $-47.4M).

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.

FONAR Corp is a specialized medical technology firm that designs, manufactures, and distributes innovative MRI systems including upright and open models. It primarily serves U.S. hospitals, diagnostic imaging centers, and healthcare providers, delivering high-precision scanning solutions for clinical diagnostic use.

ASPI vs FONR — Head-to-Head

Bigger by revenue
FONR
FONR
1.5× larger
FONR
$25.5M
$16.7M
ASPI
Growing faster (revenue YoY)
ASPI
ASPI
+1293.3% gap
ASPI
1295.7%
2.4%
FONR
More free cash flow
FONR
FONR
$47.2M more FCF
FONR
$-227.0K
$-47.4M
ASPI

Income Statement — Q4 FY2025 vs Q2 FY2026

Metric
ASPI
ASPI
FONR
FONR
Revenue
$16.7M
$25.5M
Net Profit
$2.1M
Gross Margin
12.5%
Operating Margin
13.5%
Net Margin
8.0%
Revenue YoY
1295.7%
2.4%
Net Profit YoY
-586.8%
4.7%
EPS (diluted)

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
FONR
FONR
Q4 25
$16.7M
$25.5M
Q3 25
$4.9M
$26.0M
Q2 25
$27.3M
Q1 25
$27.2M
Q4 24
$24.9M
Q3 24
$25.0M
Q2 24
$25.9M
Q1 24
$25.7M
Net Profit
ASPI
ASPI
FONR
FONR
Q4 25
$2.1M
Q3 25
$-12.9M
$2.3M
Q2 25
$729.3K
Q1 25
$2.5M
Q4 24
$2.0M
Q3 24
$3.1M
Q2 24
$830.4K
Q1 24
$1.9M
Gross Margin
ASPI
ASPI
FONR
FONR
Q4 25
12.5%
Q3 25
8.7%
Q2 25
Q1 25
Q4 24
Q3 24
Q2 24
Q1 24
Operating Margin
ASPI
ASPI
FONR
FONR
Q4 25
13.5%
Q3 25
-306.1%
14.1%
Q2 25
5.3%
Q1 25
15.2%
Q4 24
11.9%
Q3 24
21.0%
Q2 24
7.4%
Q1 24
16.8%
Net Margin
ASPI
ASPI
FONR
FONR
Q4 25
8.0%
Q3 25
-263.7%
8.7%
Q2 25
2.7%
Q1 25
9.2%
Q4 24
7.9%
Q3 24
12.6%
Q2 24
3.2%
Q1 24
7.3%
EPS (diluted)
ASPI
ASPI
FONR
FONR
Q4 25
Q3 25
$-0.15
Q2 25
Q1 25
Q4 24
Q3 24
Q2 24
Q1 24

Balance Sheet & Financial Strength

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

Metric
ASPI
ASPI
FONR
FONR
Cash + ST InvestmentsLiquidity on hand
$333.3M
$121.0K
Total DebtLower is stronger
$14.4M
Stockholders' EquityBook value
$204.2M
$176.9M
Total Assets
$498.0M
$217.2M
Debt / EquityLower = less leverage
0.07×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
ASPI
ASPI
FONR
FONR
Q4 25
$333.3M
$121.0K
Q3 25
$113.9M
$122.0K
Q2 25
$56.5M
Q1 25
$123.0K
Q4 24
$121.0K
Q3 24
$136.0K
Q2 24
$56.5M
Q1 24
$134.0K
Total Debt
ASPI
ASPI
FONR
FONR
Q4 25
$14.4M
Q3 25
$13.9M
Q2 25
Q1 25
Q4 24
Q3 24
Q2 24
$66.9K
Q1 24
Stockholders' Equity
ASPI
ASPI
FONR
FONR
Q4 25
$204.2M
$176.9M
Q3 25
$74.1M
$174.9M
Q2 25
$172.6M
Q1 25
$171.9M
Q4 24
$169.8M
Q3 24
$168.7M
Q2 24
$166.0M
Q1 24
$165.8M
Total Assets
ASPI
ASPI
FONR
FONR
Q4 25
$498.0M
$217.2M
Q3 25
$225.9M
$218.4M
Q2 25
$216.9M
Q1 25
$214.9M
Q4 24
$208.0M
Q3 24
$212.3M
Q2 24
$214.2M
Q1 24
$209.6M
Debt / Equity
ASPI
ASPI
FONR
FONR
Q4 25
0.07×
Q3 25
0.19×
Q2 25
Q1 25
Q4 24
Q3 24
Q2 24
0.00×
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
ASPI
ASPI
FONR
FONR
Operating Cash FlowLast quarter
$-37.8M
$171.0K
Free Cash FlowOCF − Capex
$-47.4M
$-227.0K
FCF MarginFCF / Revenue
-284.7%
-0.9%
Capex IntensityCapex / Revenue
57.9%
1.6%
Cash ConversionOCF / Net Profit
0.08×
TTM Free Cash FlowTrailing 4 quarters
$5.7M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
ASPI
ASPI
FONR
FONR
Q4 25
$-37.8M
$171.0K
Q3 25
$-8.9M
$1.7M
Q2 25
$4.2M
Q1 25
$3.1M
Q4 24
$2.2M
Q3 24
$1.7M
Q2 24
$4.6M
Q1 24
$2.8M
Free Cash Flow
ASPI
ASPI
FONR
FONR
Q4 25
$-47.4M
$-227.0K
Q3 25
$-12.0M
$-177.0K
Q2 25
$3.6M
Q1 25
$2.6M
Q4 24
$1.5M
Q3 24
$-148.0K
Q2 24
$4.2M
Q1 24
$2.6M
FCF Margin
ASPI
ASPI
FONR
FONR
Q4 25
-284.7%
-0.9%
Q3 25
-245.5%
-0.7%
Q2 25
13.1%
Q1 25
9.4%
Q4 24
6.0%
Q3 24
-0.6%
Q2 24
16.1%
Q1 24
10.2%
Capex Intensity
ASPI
ASPI
FONR
FONR
Q4 25
57.9%
1.6%
Q3 25
64.4%
7.2%
Q2 25
2.4%
Q1 25
2.2%
Q4 24
3.0%
Q3 24
7.2%
Q2 24
1.6%
Q1 24
0.7%
Cash Conversion
ASPI
ASPI
FONR
FONR
Q4 25
0.08×
Q3 25
0.75×
Q2 25
5.79×
Q1 25
1.26×
Q4 24
1.14×
Q3 24
0.53×
Q2 24
5.54×
Q1 24
1.50×

Financial Flow Comparison

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

Revenue Breakdown by Segment

ASPI
ASPI

Segment breakdown not available.

FONR
FONR

Managementof Diagnostic Imaging Centers$23.2M91%
Manufacturingand Servicingof Medical Equipment$2.4M9%

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