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Side-by-side financial comparison of Inogen Inc (INGN) and NPK International Inc. (NPKI). Click either name above to swap in a different company.

NPK International Inc. is the larger business by last-quarter revenue ($75.2M vs $68.6M, roughly 1.1× Inogen Inc). On growth, NPK International Inc. posted the faster year-over-year revenue change (30.7% vs 3.4%). NPK International Inc. produced more free cash flow last quarter ($5.8M vs $-1.9M). Over the past eight quarters, NPK International Inc.'s revenue compounded faster (23.9% CAGR vs 4.2%).

Inogen Inc is a medical technology firm specializing in the development, production and distribution of portable oxygen concentrators and associated respiratory care products. It caters primarily to patients with chronic respiratory conditions needing long-term oxygen therapy across North America, Europe and other global markets, focusing on home care and ambulatory patient segments to enhance users' quality of life.

INGN vs NPKI — Head-to-Head

Bigger by revenue
NPKI
NPKI
1.1× larger
NPKI
$75.2M
$68.6M
INGN
Growing faster (revenue YoY)
NPKI
NPKI
+27.3% gap
NPKI
30.7%
3.4%
INGN
More free cash flow
NPKI
NPKI
$7.7M more FCF
NPKI
$5.8M
$-1.9M
INGN
Faster 2-yr revenue CAGR
NPKI
NPKI
Annualised
NPKI
23.9%
4.2%
INGN

Income Statement — Q4 FY2025 vs Q4 FY2025

Metric
INGN
INGN
NPKI
NPKI
Revenue
$68.6M
$75.2M
Net Profit
Gross Margin
51.4%
37.7%
Operating Margin
-13.6%
16.7%
Net Margin
Revenue YoY
3.4%
30.7%
Net Profit YoY
EPS (diluted)
$-0.26
$0.17

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
INGN
INGN
NPKI
NPKI
Q4 25
$68.6M
$75.2M
Q3 25
$79.1M
$68.8M
Q2 25
$79.2M
$68.2M
Q1 25
$68.5M
$64.8M
Q4 24
$66.3M
$57.5M
Q3 24
$74.9M
$44.2M
Q2 24
$74.4M
$66.8M
Q1 24
$63.1M
$49.0M
Net Profit
INGN
INGN
NPKI
NPKI
Q4 25
Q3 25
$-5.3M
$5.7M
Q2 25
$-4.2M
$8.7M
Q1 25
$-6.2M
$10.0M
Q4 24
Q3 24
$-6.0M
$-174.3M
Q2 24
$-5.6M
$8.0M
Q1 24
$-14.6M
$7.3M
Gross Margin
INGN
INGN
NPKI
NPKI
Q4 25
51.4%
37.7%
Q3 25
52.2%
31.9%
Q2 25
52.2%
36.9%
Q1 25
53.1%
39.0%
Q4 24
54.7%
39.2%
Q3 24
55.2%
27.5%
Q2 24
57.4%
37.2%
Q1 24
54.5%
36.0%
Operating Margin
INGN
INGN
NPKI
NPKI
Q4 25
-13.6%
16.7%
Q3 25
-9.0%
13.2%
Q2 25
-7.7%
17.0%
Q1 25
-11.2%
20.9%
Q4 24
-17.2%
20.2%
Q3 24
-10.4%
2.8%
Q2 24
-9.5%
18.7%
Q1 24
-25.8%
14.2%
Net Margin
INGN
INGN
NPKI
NPKI
Q4 25
Q3 25
-6.7%
8.2%
Q2 25
-5.2%
12.7%
Q1 25
-9.0%
15.4%
Q4 24
Q3 24
-8.0%
-394.3%
Q2 24
-7.5%
12.0%
Q1 24
-23.1%
14.9%
EPS (diluted)
INGN
INGN
NPKI
NPKI
Q4 25
$-0.26
$0.17
Q3 25
$-0.20
$0.07
Q2 25
$-0.15
$0.10
Q1 25
$-0.25
$0.11
Q4 24
$-0.41
$0.10
Q3 24
$-0.25
$-1.99
Q2 24
$-0.24
$0.09
Q1 24
$-0.62
$0.08

Balance Sheet & Financial Strength

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

Metric
INGN
INGN
NPKI
NPKI
Cash + ST InvestmentsLiquidity on hand
$103.7M
$5.1M
Total DebtLower is stronger
$16.9M
Stockholders' EquityBook value
$192.2M
$351.2M
Total Assets
$298.6M
$441.8M
Debt / EquityLower = less leverage
0.05×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
INGN
INGN
NPKI
NPKI
Q4 25
$103.7M
$5.1M
Q3 25
$106.5M
$35.6M
Q2 25
$103.7M
$26.0M
Q1 25
$118.9M
$20.8M
Q4 24
$113.8M
$17.8M
Q3 24
$105.7M
$42.9M
Q2 24
$97.9M
$35.1M
Q1 24
$107.4M
$37.7M
Total Debt
INGN
INGN
NPKI
NPKI
Q4 25
$16.9M
Q3 25
$9.5M
Q2 25
$9.3M
Q1 25
$8.1M
Q4 24
$7.7M
Q3 24
$14.0M
Q2 24
$58.0M
Q1 24
$77.4M
Stockholders' Equity
INGN
INGN
NPKI
NPKI
Q4 25
$192.2M
$351.2M
Q3 25
$197.2M
$333.9M
Q2 25
$199.5M
$328.8M
Q1 25
$198.0M
$326.9M
Q4 24
$173.9M
$326.5M
Q3 24
$185.4M
$316.5M
Q2 24
$187.6M
$426.6M
Q1 24
$191.9M
$421.6M
Total Assets
INGN
INGN
NPKI
NPKI
Q4 25
$298.6M
$441.8M
Q3 25
$307.0M
$404.5M
Q2 25
$312.0M
$393.7M
Q1 25
$308.4M
$390.0M
Q4 24
$296.2M
$393.7M
Q3 24
$306.2M
$389.6M
Q2 24
$308.9M
$624.8M
Q1 24
$315.6M
$640.8M
Debt / Equity
INGN
INGN
NPKI
NPKI
Q4 25
0.05×
Q3 25
0.03×
Q2 25
0.03×
Q1 25
0.02×
Q4 24
0.02×
Q3 24
0.04×
Q2 24
0.14×
Q1 24
0.18×

Cash Flow & Capital Efficiency

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

Metric
INGN
INGN
NPKI
NPKI
Operating Cash FlowLast quarter
$-943.0K
$18.0M
Free Cash FlowOCF − Capex
$-1.9M
$5.8M
FCF MarginFCF / Revenue
-2.8%
7.6%
Capex IntensityCapex / Revenue
1.4%
16.3%
Cash ConversionOCF / Net Profit
TTM Free Cash FlowTrailing 4 quarters
$-13.7M
$26.3M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
INGN
INGN
NPKI
NPKI
Q4 25
$-943.0K
$18.0M
Q3 25
$2.2M
$24.7M
Q2 25
$4.3M
$21.4M
Q1 25
$-16.8M
$8.8M
Q4 24
$-3.0M
$-4.1M
Q3 24
$7.0M
$2.8M
Q2 24
$6.7M
$27.6M
Q1 24
$-4.7M
$11.9M
Free Cash Flow
INGN
INGN
NPKI
NPKI
Q4 25
$-1.9M
$5.8M
Q3 25
$1.6M
$12.0M
Q2 25
$3.7M
$9.7M
Q1 25
$-17.1M
$-1.2M
Q4 24
$-3.3M
$-17.7M
Q3 24
$5.3M
$-6.7M
Q2 24
$6.6M
$21.0M
Q1 24
$-6.1M
$-1.9M
FCF Margin
INGN
INGN
NPKI
NPKI
Q4 25
-2.8%
7.6%
Q3 25
2.0%
17.4%
Q2 25
4.6%
14.3%
Q1 25
-24.9%
-1.8%
Q4 24
-5.0%
-30.8%
Q3 24
7.1%
-15.2%
Q2 24
8.9%
31.4%
Q1 24
-9.6%
-3.9%
Capex Intensity
INGN
INGN
NPKI
NPKI
Q4 25
1.4%
16.3%
Q3 25
0.7%
18.5%
Q2 25
0.9%
17.1%
Q1 25
0.4%
15.5%
Q4 24
0.5%
23.6%
Q3 24
2.2%
21.4%
Q2 24
0.1%
9.9%
Q1 24
2.1%
28.3%
Cash Conversion
INGN
INGN
NPKI
NPKI
Q4 25
Q3 25
4.37×
Q2 25
2.47×
Q1 25
0.88×
Q4 24
Q3 24
Q2 24
3.43×
Q1 24
1.64×

Financial Flow Comparison

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

Revenue Breakdown by Segment

INGN
INGN

Other$36.1M53%
Non Us$32.5M47%

NPKI
NPKI

Rental Revenue$34.8M46%
Products$25.5M34%
Services$14.9M20%

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