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Side-by-side financial comparison of NATURAL GAS SERVICES GROUP INC (NGS) and NELNET INC (NNI). Click either name above to swap in a different company.

NATURAL GAS SERVICES GROUP INC is the larger business by last-quarter revenue ($46.1M vs $33.5M, roughly 1.4× NELNET INC). NELNET INC runs the higher net margin — 172.3% vs 8.9%, a 163.4% gap on every dollar of revenue. On growth, NELNET INC posted the faster year-over-year revenue change (79.6% vs 13.5%). NELNET INC produced more free cash flow last quarter ($396.7M vs $-20.7M).

Southern Company Gas, formerly AGL Resources, is an American Fortune 500 energy services holding company headquartered in Atlanta, Georgia. The company's operations consist of natural gas distribution, wholesale services, retail operations, and midstream operations. Southern Company Gas is one of the largest natural gas distribution companies in the United States. The company serves approximately 4.5 million utility customers through its regulated distribution subsidiaries across four states....

Nelnet, Inc. is a United States–based conglomerate that primarily focuses on financial services including student and consumer loan origination and servicing. Additionally, the company operates an investing arm, an internet bank and has a 26% stake in Allo Fiber, a cable and internet provider. The company is headquartered in Lincoln, Nebraska.

NGS vs NNI — Head-to-Head

Bigger by revenue
NGS
NGS
1.4× larger
NGS
$46.1M
$33.5M
NNI
Growing faster (revenue YoY)
NNI
NNI
+66.1% gap
NNI
79.6%
13.5%
NGS
Higher net margin
NNI
NNI
163.4% more per $
NNI
172.3%
8.9%
NGS
More free cash flow
NNI
NNI
$417.4M more FCF
NNI
$396.7M
$-20.7M
NGS

Income Statement — Q4 FY2025 vs Q4 FY2025

Metric
NGS
NGS
NNI
NNI
Revenue
$46.1M
$33.5M
Net Profit
$4.1M
$57.8M
Gross Margin
50.5%
Operating Margin
15.4%
Net Margin
8.9%
172.3%
Revenue YoY
13.5%
79.6%
Net Profit YoY
43.2%
-8.5%
EPS (diluted)
$0.32
$1.62

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
NGS
NGS
NNI
NNI
Q4 25
$46.1M
$33.5M
Q3 25
$43.4M
$23.2M
Q2 25
$41.4M
$26.1M
Q1 25
$41.4M
$24.7M
Q4 24
$40.7M
$18.7M
Q3 24
$16.6M
Q2 24
$14.9M
Q1 24
$12.8M
Net Profit
NGS
NGS
NNI
NNI
Q4 25
$4.1M
$57.8M
Q3 25
$5.8M
$106.7M
Q2 25
$5.2M
$181.5M
Q1 25
$4.9M
$82.6M
Q4 24
$2.9M
$63.2M
Q3 24
$2.4M
Q2 24
$45.1M
Q1 24
$73.4M
Gross Margin
NGS
NGS
NNI
NNI
Q4 25
50.5%
Q3 25
29.6%
Q2 25
29.8%
Q1 25
30.5%
Q4 24
13.7%
Q3 24
0.1%
Q2 24
27.3%
Q1 24
15.3%
Operating Margin
NGS
NGS
NNI
NNI
Q4 25
15.4%
Q3 25
24.8%
Q2 25
24.0%
Q1 25
23.0%
Q4 24
14.9%
97.7%
Q3 24
-13.4%
Q2 24
88.0%
Q1 24
Net Margin
NGS
NGS
NNI
NNI
Q4 25
8.9%
172.3%
Q3 25
13.3%
460.5%
Q2 25
12.5%
694.9%
Q1 25
11.7%
334.4%
Q4 24
7.0%
338.2%
Q3 24
14.4%
Q2 24
303.6%
Q1 24
574.4%
EPS (diluted)
NGS
NGS
NNI
NNI
Q4 25
$0.32
$1.62
Q3 25
$0.46
$2.94
Q2 25
$0.41
$4.97
Q1 25
$0.38
$2.26
Q4 24
$0.22
$1.74
Q3 24
$0.07
Q2 24
$1.23
Q1 24
$1.98

Balance Sheet & Financial Strength

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

Metric
NGS
NGS
NNI
NNI
Cash + ST InvestmentsLiquidity on hand
$296.0M
Total DebtLower is stronger
$7.8B
Stockholders' EquityBook value
$274.7M
$3.7B
Total Assets
$586.8M
$14.1B
Debt / EquityLower = less leverage
2.11×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
NGS
NGS
NNI
NNI
Q4 25
$296.0M
Q3 25
$216.4M
Q2 25
$325.0K
$225.8M
Q1 25
$2.1M
$220.5M
Q4 24
$2.1M
$194.5M
Q3 24
$219.7M
Q2 24
$145.5M
Q1 24
$179.7M
Total Debt
NGS
NGS
NNI
NNI
Q4 25
$7.8B
Q3 25
$7.8B
Q2 25
$7.9B
Q1 25
$8.7B
Q4 24
$8.3B
Q3 24
$8.9B
Q2 24
$9.6B
Q1 24
$10.6B
Stockholders' Equity
NGS
NGS
NNI
NNI
Q4 25
$274.7M
$3.7B
Q3 25
$271.4M
$3.7B
Q2 25
$266.2M
$3.6B
Q1 25
$260.3M
$3.4B
Q4 24
$255.1M
$3.3B
Q3 24
$3.3B
Q2 24
$3.3B
Q1 24
$3.3B
Total Assets
NGS
NGS
NNI
NNI
Q4 25
$586.8M
$14.1B
Q3 25
$562.3M
$13.9B
Q2 25
$525.5M
$13.7B
Q1 25
$501.7M
$14.2B
Q4 24
$492.5M
$13.8B
Q3 24
$14.1B
Q2 24
$14.5B
Q1 24
$15.4B
Debt / Equity
NGS
NGS
NNI
NNI
Q4 25
2.11×
Q3 25
2.14×
Q2 25
2.21×
Q1 25
2.53×
Q4 24
2.48×
Q3 24
2.72×
Q2 24
2.90×
Q1 24
3.20×

Cash Flow & Capital Efficiency

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

Metric
NGS
NGS
NNI
NNI
Operating Cash FlowLast quarter
$13.9M
$423.0M
Free Cash FlowOCF − Capex
$-20.7M
$396.7M
FCF MarginFCF / Revenue
-44.8%
1183.0%
Capex IntensityCapex / Revenue
74.9%
78.2%
Cash ConversionOCF / Net Profit
3.38×
7.32×
TTM Free Cash FlowTrailing 4 quarters
$-58.6M
$663.4M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
NGS
NGS
NNI
NNI
Q4 25
$13.9M
$423.0M
Q3 25
$16.8M
$112.4M
Q2 25
$11.0M
$81.8M
Q1 25
$21.3M
$91.2M
Q4 24
$9.4M
$662.9M
Q3 24
$137.0M
Q2 24
$133.8M
Q1 24
$211.6M
Free Cash Flow
NGS
NGS
NNI
NNI
Q4 25
$-20.7M
$396.7M
Q3 25
$-25.1M
$100.8M
Q2 25
$-14.8M
$78.1M
Q1 25
$2.0M
$87.8M
Q4 24
$-5.1M
$642.0M
Q3 24
$132.6M
Q2 24
$123.1M
Q1 24
$188.3M
FCF Margin
NGS
NGS
NNI
NNI
Q4 25
-44.8%
1183.0%
Q3 25
-57.7%
435.0%
Q2 25
-35.8%
299.0%
Q1 25
4.9%
355.6%
Q4 24
-12.6%
3438.0%
Q3 24
797.9%
Q2 24
829.2%
Q1 24
1473.7%
Capex Intensity
NGS
NGS
NNI
NNI
Q4 25
74.9%
78.2%
Q3 25
96.5%
50.4%
Q2 25
62.4%
14.2%
Q1 25
46.5%
13.7%
Q4 24
35.8%
111.9%
Q3 24
26.7%
Q2 24
71.5%
Q1 24
181.7%
Cash Conversion
NGS
NGS
NNI
NNI
Q4 25
3.38×
7.32×
Q3 25
2.90×
1.05×
Q2 25
2.12×
0.45×
Q1 25
4.38×
1.10×
Q4 24
3.29×
10.50×
Q3 24
57.39×
Q2 24
2.97×
Q1 24
2.88×

Financial Flow Comparison

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

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