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Side-by-side financial comparison of AmpliTech Group, Inc. (AMPG) and CarMax (KMX). Click either name above to swap in a different company.

CarMax is the larger business by last-quarter revenue ($5.8B vs $4.5M, roughly 1294.1× AmpliTech Group, Inc.). CarMax runs the higher net margin — 1.1% vs -71.6%, a 72.7% gap on every dollar of revenue. On growth, AmpliTech Group, Inc. posted the faster year-over-year revenue change (141.6% vs -6.9%). CarMax produced more free cash flow last quarter ($1.1B vs $-3.5M). Over the past eight quarters, AmpliTech Group, Inc.'s revenue compounded faster (39.7% CAGR vs 1.5%).

Ampli Energy is a South African company providing a renewable energy trading platform that uses a wheeling process to deliver green energy to consumers.

CarMax, Inc. is a used vehicle retailer based in the United States. It operates two business segments: CarMax Sales Operations and CarMax Auto Finance. The company began as a side business of Circuit City Corporation, Inc., opening its first location in September 1993 in Richmond, Virginia. As of January 2025, CarMax operates 253 locations.

AMPG vs KMX — Head-to-Head

Bigger by revenue
KMX
KMX
1294.1× larger
KMX
$5.8B
$4.5M
AMPG
Growing faster (revenue YoY)
AMPG
AMPG
+148.5% gap
AMPG
141.6%
-6.9%
KMX
Higher net margin
KMX
KMX
72.7% more per $
KMX
1.1%
-71.6%
AMPG
More free cash flow
KMX
KMX
$1.1B more FCF
KMX
$1.1B
$-3.5M
AMPG
Faster 2-yr revenue CAGR
AMPG
AMPG
Annualised
AMPG
39.7%
1.5%
KMX

Income Statement — Q4 2025 vs Q3 2026

Metric
AMPG
AMPG
KMX
KMX
Revenue
$4.5M
$5.8B
Net Profit
$-3.2M
$62.2M
Gross Margin
22.8%
10.2%
Operating Margin
-73.3%
Net Margin
-71.6%
1.1%
Revenue YoY
141.6%
-6.9%
Net Profit YoY
16.1%
-50.4%
EPS (diluted)
$-0.14
$0.43

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
AMPG
AMPG
KMX
KMX
Q4 25
$4.5M
$5.8B
Q3 25
$6.1M
$6.6B
Q2 25
$11.0M
$7.5B
Q1 25
$3.6M
$6.0B
Q4 24
$1.9M
$6.2B
Q3 24
$2.8M
$7.0B
Q2 24
$2.5M
$7.1B
Q1 24
$2.3M
$5.6B
Net Profit
AMPG
AMPG
KMX
KMX
Q4 25
$-3.2M
$62.2M
Q3 25
$-188.4K
$95.4M
Q2 25
$-1.8M
$210.4M
Q1 25
$-1.8M
$89.9M
Q4 24
$-3.8M
$125.4M
Q3 24
$-1.2M
$132.8M
Q2 24
$-1.6M
$152.4M
Q1 24
$-4.7M
$50.3M
Gross Margin
AMPG
AMPG
KMX
KMX
Q4 25
22.8%
10.2%
Q3 25
48.6%
10.9%
Q2 25
7.8%
11.8%
Q1 25
33.0%
11.1%
Q4 24
10.7%
10.9%
Q3 24
47.6%
10.8%
Q2 24
41.8%
11.1%
Q1 24
38.5%
10.4%
Operating Margin
AMPG
AMPG
KMX
KMX
Q4 25
-73.3%
Q3 25
-3.6%
Q2 25
-17.5%
Q1 25
-52.5%
2.0%
Q4 24
-234.5%
2.7%
Q3 24
-38.4%
2.5%
Q2 24
-62.0%
2.9%
Q1 24
-62.3%
1.2%
Net Margin
AMPG
AMPG
KMX
KMX
Q4 25
-71.6%
1.1%
Q3 25
-3.1%
1.4%
Q2 25
-16.1%
2.8%
Q1 25
-51.1%
1.5%
Q4 24
-206.2%
2.0%
Q3 24
-42.0%
1.9%
Q2 24
-62.4%
2.1%
Q1 24
-203.0%
0.9%
EPS (diluted)
AMPG
AMPG
KMX
KMX
Q4 25
$-0.14
$0.43
Q3 25
$-0.01
$0.64
Q2 25
$-0.09
$1.38
Q1 25
$-0.09
$0.58
Q4 24
$-0.28
$0.81
Q3 24
$-0.12
$0.85
Q2 24
$-0.16
$0.97
Q1 24
$-0.48
$0.31

Balance Sheet & Financial Strength

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

Metric
AMPG
AMPG
KMX
KMX
Cash + ST InvestmentsLiquidity on hand
$5.0M
$204.9M
Total DebtLower is stronger
$16.6B
Stockholders' EquityBook value
$32.9M
$6.1B
Total Assets
$51.5M
$25.6B
Debt / EquityLower = less leverage
2.74×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
AMPG
AMPG
KMX
KMX
Q4 25
$5.0M
$204.9M
Q3 25
$8.4M
$540.4M
Q2 25
$11.1M
$262.8M
Q1 25
$16.9M
$247.0M
Q4 24
$19.3M
$271.9M
Q3 24
$1.1M
$524.7M
Q2 24
$1.0M
$218.9M
Q1 24
$2.4M
$574.1M
Total Debt
AMPG
AMPG
KMX
KMX
Q4 25
$16.6B
Q3 25
$17.8B
Q2 25
$18.0B
Q1 25
$18.1B
Q4 24
$18.1B
Q3 24
$1.1M
$18.1B
Q2 24
$36.4K
$18.2B
Q1 24
$63.2K
$18.0B
Stockholders' Equity
AMPG
AMPG
KMX
KMX
Q4 25
$32.9M
$6.1B
Q3 25
$35.8M
$6.2B
Q2 25
$35.8M
$6.3B
Q1 25
$35.8M
$6.2B
Q4 24
$37.5M
$6.2B
Q3 24
$20.4M
$6.2B
Q2 24
$20.7M
$6.2B
Q1 24
$22.2M
$6.1B
Total Assets
AMPG
AMPG
KMX
KMX
Q4 25
$51.5M
$25.6B
Q3 25
$47.2M
$27.1B
Q2 25
$48.6M
$27.4B
Q1 25
$42.1M
$27.4B
Q4 24
$43.2M
$27.3B
Q3 24
$27.5M
$27.3B
Q2 24
$25.4M
$27.2B
Q1 24
$26.9M
$27.2B
Debt / Equity
AMPG
AMPG
KMX
KMX
Q4 25
2.74×
Q3 25
2.87×
Q2 25
2.86×
Q1 25
2.91×
Q4 24
2.92×
Q3 24
0.06×
2.93×
Q2 24
0.00×
2.95×
Q1 24
0.00×
2.96×

Cash Flow & Capital Efficiency

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

Metric
AMPG
AMPG
KMX
KMX
Operating Cash FlowLast quarter
$-3.4M
$1.3B
Free Cash FlowOCF − Capex
$-3.5M
$1.1B
FCF MarginFCF / Revenue
-78.4%
19.2%
Capex IntensityCapex / Revenue
1.9%
2.4%
Cash ConversionOCF / Net Profit
20.14×
TTM Free Cash FlowTrailing 4 quarters
$-9.7M
$1.9B

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
AMPG
AMPG
KMX
KMX
Q4 25
$-3.4M
$1.3B
Q3 25
$-999.4K
$785.5M
Q2 25
$-2.3M
$299.5M
Q1 25
$-2.0M
$146.4M
Q4 24
$-1.2M
$-23.4M
Q3 24
$-1.7M
$619.1M
Q2 24
$-1.3M
$-117.7M
Q1 24
$-1.1M
$309.6M
Free Cash Flow
AMPG
AMPG
KMX
KMX
Q4 25
$-3.5M
$1.1B
Q3 25
$-1.4M
$654.0M
Q2 25
$-2.4M
$162.8M
Q1 25
$-2.4M
$18.8M
Q4 24
$-1.2M
$-150.6M
Q3 24
$-1.7M
$509.9M
Q2 24
$-1.3M
$-221.6M
Q1 24
$-1.1M
$199.8M
FCF Margin
AMPG
AMPG
KMX
KMX
Q4 25
-78.4%
19.2%
Q3 25
-23.7%
9.9%
Q2 25
-21.6%
2.2%
Q1 25
-65.8%
0.3%
Q4 24
-63.9%
-2.4%
Q3 24
-61.6%
7.3%
Q2 24
-52.7%
-3.1%
Q1 24
-47.0%
3.6%
Capex Intensity
AMPG
AMPG
KMX
KMX
Q4 25
1.9%
2.4%
Q3 25
7.3%
2.0%
Q2 25
1.1%
1.8%
Q1 25
10.0%
2.1%
Q4 24
0.9%
2.0%
Q3 24
0.4%
1.6%
Q2 24
0.5%
1.5%
Q1 24
0.1%
2.0%
Cash Conversion
AMPG
AMPG
KMX
KMX
Q4 25
20.14×
Q3 25
8.24×
Q2 25
1.42×
Q1 25
1.63×
Q4 24
-0.19×
Q3 24
4.66×
Q2 24
-0.77×
Q1 24
6.16×

Financial Flow Comparison

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

Revenue Breakdown by Segment

AMPG
AMPG

Segment breakdown not available.

KMX
KMX

Used Vehicles$4.5B78%
Wholesale Vehicles$1.1B19%
Other$150.6M3%
Extendedprotectionplan Domain$96.6M2%
Advertising Subscription Revenues Domain$35.1M1%
Service Domain$18.5M0%
Thirdpartyfinancefees Domain$3.0M0%

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