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Side-by-side financial comparison of ASP Isotopes Inc. (ASPI) and FLEXIBLE SOLUTIONS INTERNATIONAL INC (FSI). Click either name above to swap in a different company.

ASP Isotopes Inc. is the larger business by last-quarter revenue ($16.7M vs $9.1M, roughly 1.8× FLEXIBLE SOLUTIONS INTERNATIONAL INC). On growth, ASP Isotopes Inc. posted the faster year-over-year revenue change (1295.7% vs -0.5%). FLEXIBLE SOLUTIONS INTERNATIONAL INC produced more free cash flow last quarter ($-4.0M vs $-47.4M). Over the past eight quarters, ASP Isotopes Inc.'s revenue compounded faster (345.2% CAGR vs -0.6%).

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.

Flexible Solutions International Inc develops and manufactures specialty chemicals for water conservation, energy efficiency, and agricultural use. Core products include water body evaporative reduction solutions, farm crop yield additives, and swimming pool heat retention products, serving customers across North America and global agricultural markets.

ASPI vs FSI — Head-to-Head

Bigger by revenue
ASPI
ASPI
1.8× larger
ASPI
$16.7M
$9.1M
FSI
Growing faster (revenue YoY)
ASPI
ASPI
+1296.2% gap
ASPI
1295.7%
-0.5%
FSI
More free cash flow
FSI
FSI
$43.4M more FCF
FSI
$-4.0M
$-47.4M
ASPI
Faster 2-yr revenue CAGR
ASPI
ASPI
Annualised
ASPI
345.2%
-0.6%
FSI

Income Statement — Q4 2025 vs Q4 2025

Metric
ASPI
ASPI
FSI
FSI
Revenue
$16.7M
$9.1M
Net Profit
$-460.9K
Gross Margin
12.5%
29.4%
Operating Margin
11.6%
Net Margin
-5.1%
Revenue YoY
1295.7%
-0.5%
Net Profit YoY
-586.8%
-167.8%
EPS (diluted)
$-0.03

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
FSI
FSI
Q4 25
$16.7M
$9.1M
Q3 25
$4.9M
$10.6M
Q2 25
$1.2M
$11.4M
Q1 25
$1.1M
$7.5M
Q4 24
$1.2M
$9.2M
Q3 24
$1.1M
$9.3M
Q2 24
$1.0M
$10.5M
Q1 24
$840.4K
$9.2M
Net Profit
ASPI
ASPI
FSI
FSI
Q4 25
$-460.9K
Q3 25
$-12.9M
$-503.4K
Q2 25
$-75.2M
$2.0M
Q1 25
$-8.5M
$-277.7K
Q4 24
$679.6K
Q3 24
$-7.4M
$611.9K
Q2 24
$-8.9M
$1.3M
Q1 24
$-7.0M
$457.2K
Gross Margin
ASPI
ASPI
FSI
FSI
Q4 25
12.5%
29.4%
Q3 25
8.7%
23.9%
Q2 25
47.7%
47.4%
Q1 25
29.7%
26.1%
Q4 24
50.7%
29.2%
Q3 24
27.0%
40.9%
Q2 24
41.2%
37.4%
Q1 24
33.2%
30.6%
Operating Margin
ASPI
ASPI
FSI
FSI
Q4 25
11.6%
Q3 25
-306.1%
2.9%
Q2 25
-998.8%
29.0%
Q1 25
-721.9%
-0.9%
Q4 24
9.4%
Q3 24
-499.6%
20.5%
Q2 24
-729.5%
18.7%
Q1 24
-691.9%
8.3%
Net Margin
ASPI
ASPI
FSI
FSI
Q4 25
-5.1%
Q3 25
-263.7%
-4.8%
Q2 25
-6271.7%
17.8%
Q1 25
-768.1%
-3.7%
Q4 24
7.4%
Q3 24
-676.2%
6.6%
Q2 24
-868.8%
12.3%
Q1 24
-828.8%
5.0%
EPS (diluted)
ASPI
ASPI
FSI
FSI
Q4 25
$-0.03
Q3 25
$-0.15
$-0.04
Q2 25
$-1.03
$0.15
Q1 25
$-0.12
$-0.02
Q4 24
$0.05
Q3 24
$-0.12
$0.05
Q2 24
$-0.24
$0.10
Q1 24
$-0.16
$0.04

Balance Sheet & Financial Strength

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

Metric
ASPI
ASPI
FSI
FSI
Cash + ST InvestmentsLiquidity on hand
$333.3M
Total DebtLower is stronger
$14.4M
$4.4M
Stockholders' EquityBook value
$204.2M
$38.9M
Total Assets
$498.0M
$61.8M
Debt / EquityLower = less leverage
0.07×
0.11×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
ASPI
ASPI
FSI
FSI
Q4 25
$333.3M
Q3 25
$113.9M
Q2 25
$67.7M
$10.0M
Q1 25
$56.0M
$11.0M
Q4 24
$61.9M
$10.0M
Q3 24
$51.6M
$13.0M
Q2 24
$9.2M
Q1 24
$8.3M
Total Debt
ASPI
ASPI
FSI
FSI
Q4 25
$14.4M
$4.4M
Q3 25
$13.9M
$7.1M
Q2 25
$7.5M
Q1 25
$8.1M
Q4 24
$2.4M
$8.8M
Q3 24
$9.4M
Q2 24
$8.3M
Q1 24
$8.0M
Stockholders' Equity
ASPI
ASPI
FSI
FSI
Q4 25
$204.2M
$38.9M
Q3 25
$74.1M
$39.0M
Q2 25
$25.2M
$39.4M
Q1 25
$42.5M
$38.4M
Q4 24
$47.9M
$38.0M
Q3 24
$38.7M
$36.9M
Q2 24
$11.0M
$36.2M
Q1 24
$10.5M
$36.0M
Total Assets
ASPI
ASPI
FSI
FSI
Q4 25
$498.0M
$61.8M
Q3 25
$225.9M
$58.4M
Q2 25
$135.9M
$58.2M
Q1 25
$90.9M
$61.7M
Q4 24
$94.3M
$60.0M
Q3 24
$84.1M
$57.8M
Q2 24
$54.8M
$56.3M
Q1 24
$45.4M
$57.6M
Debt / Equity
ASPI
ASPI
FSI
FSI
Q4 25
0.07×
0.11×
Q3 25
0.19×
0.18×
Q2 25
0.19×
Q1 25
0.21×
Q4 24
0.05×
0.23×
Q3 24
0.25×
Q2 24
0.23×
Q1 24
0.22×

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
FSI
FSI
Operating Cash FlowLast quarter
$-37.8M
$-3.0M
Free Cash FlowOCF − Capex
$-47.4M
$-4.0M
FCF MarginFCF / Revenue
-284.7%
-44.3%
Capex IntensityCapex / Revenue
57.9%
11.7%
Cash ConversionOCF / Net Profit
TTM Free Cash FlowTrailing 4 quarters
$-74.6M
$-591.7K

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
ASPI
ASPI
FSI
FSI
Q4 25
$-37.8M
$-3.0M
Q3 25
$-8.9M
$2.0M
Q2 25
$-7.9M
$5.3M
Q1 25
$-3.2M
$-544.3K
Q4 24
$-16.7M
$-2.2M
Q3 24
$-4.8M
$2.5M
Q2 24
$-5.1M
$5.9M
Q1 24
$-3.0M
$-604.8K
Free Cash Flow
ASPI
ASPI
FSI
FSI
Q4 25
$-47.4M
$-4.0M
Q3 25
$-12.0M
$39.4K
Q2 25
$-9.7M
$4.3M
Q1 25
$-5.5M
$-898.4K
Q4 24
$-26.4M
$-4.3M
Q3 24
$-9.3M
$1.3M
Q2 24
$-7.7M
$4.7M
Q1 24
$-4.2M
$-1.1M
FCF Margin
ASPI
ASPI
FSI
FSI
Q4 25
-284.7%
-44.3%
Q3 25
-245.5%
0.4%
Q2 25
-809.4%
37.9%
Q1 25
-497.4%
-12.0%
Q4 24
-2209.3%
-47.0%
Q3 24
-857.3%
13.6%
Q2 24
-757.8%
44.9%
Q1 24
-501.7%
-11.7%
Capex Intensity
ASPI
ASPI
FSI
FSI
Q4 25
57.9%
11.7%
Q3 25
64.4%
18.7%
Q2 25
150.1%
8.6%
Q1 25
209.6%
4.7%
Q4 24
810.5%
22.8%
Q3 24
412.3%
13.0%
Q2 24
256.5%
11.3%
Q1 24
148.3%
5.2%
Cash Conversion
ASPI
ASPI
FSI
FSI
Q4 25
Q3 25
Q2 25
2.60×
Q1 25
Q4 24
-3.27×
Q3 24
4.05×
Q2 24
4.59×
Q1 24
-1.32×

Financial Flow Comparison

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

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