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Side-by-side financial comparison of MKS INC (MKSI) and STAR GROUP, L.P. (SGU). Click either name above to swap in a different company.

MKS INC is the larger business by last-quarter revenue ($1.0B vs $539.3M, roughly 1.9× STAR GROUP, L.P.). MKS INC runs the higher net margin — 10.3% vs 6.6%, a 3.7% gap on every dollar of revenue. On growth, MKS INC posted the faster year-over-year revenue change (10.6% vs 10.5%). MKS INC produced more free cash flow last quarter ($92.0M vs $-59.7M).

MKS, Inc is a subsidiary of PTC, Inc. It was previously a multinational independent software vendor that was acquired by Parametric Technology Corporation on May 31, 2011. MKS operated in the Application Lifecycle Management (ALM) and Systems Administration market segments.

Lone Star Funds, legal name of main entity Lone Star Global Acquisitions, Ltd. is a global private equity firm that invests in corporate equity, real estate, credit, and other financial assets. The founder of Lone Star established its first fund in 1995 and Lone Star has to date organized 25 private equity funds with total capital commitments since inception of over $95 billion. Lone Star's investors include corporate and public pension funds, sovereign wealth funds, university endowments, fo...

MKSI vs SGU — Head-to-Head

Bigger by revenue
MKSI
MKSI
1.9× larger
MKSI
$1.0B
$539.3M
SGU
Growing faster (revenue YoY)
MKSI
MKSI
+0.1% gap
MKSI
10.6%
10.5%
SGU
Higher net margin
MKSI
MKSI
3.7% more per $
MKSI
10.3%
6.6%
SGU
More free cash flow
MKSI
MKSI
$151.7M more FCF
MKSI
$92.0M
$-59.7M
SGU

Income Statement — Q4 FY2025 vs Q1 FY2026

Metric
MKSI
MKSI
SGU
SGU
Revenue
$1.0B
$539.3M
Net Profit
$107.0M
$35.8M
Gross Margin
46.3%
Operating Margin
13.9%
10.1%
Net Margin
10.3%
6.6%
Revenue YoY
10.6%
10.5%
Net Profit YoY
18.9%
8.8%
EPS (diluted)
$1.58

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
MKSI
MKSI
SGU
SGU
Q4 25
$1.0B
$539.3M
Q3 25
$988.0M
Q2 25
$973.0M
Q1 25
$936.0M
Q4 24
$935.0M
Q3 24
$896.0M
Q2 24
$887.0M
Q1 24
$868.0M
Net Profit
MKSI
MKSI
SGU
SGU
Q4 25
$107.0M
$35.8M
Q3 25
$74.0M
Q2 25
$62.0M
Q1 25
$52.0M
Q4 24
$90.0M
Q3 24
$62.0M
Q2 24
$23.0M
Q1 24
$15.0M
Gross Margin
MKSI
MKSI
SGU
SGU
Q4 25
46.3%
Q3 25
46.7%
Q2 25
46.6%
Q1 25
47.4%
Q4 24
47.3%
Q3 24
48.2%
Q2 24
47.2%
Q1 24
47.8%
Operating Margin
MKSI
MKSI
SGU
SGU
Q4 25
13.9%
10.1%
Q3 25
14.0%
Q2 25
13.9%
Q1 25
11.9%
Q4 24
14.7%
Q3 24
14.3%
Q2 24
14.3%
Q1 24
12.2%
Net Margin
MKSI
MKSI
SGU
SGU
Q4 25
10.3%
6.6%
Q3 25
7.5%
Q2 25
6.4%
Q1 25
5.6%
Q4 24
9.6%
Q3 24
6.9%
Q2 24
2.6%
Q1 24
1.7%
EPS (diluted)
MKSI
MKSI
SGU
SGU
Q4 25
$1.58
Q3 25
$1.10
Q2 25
$0.92
Q1 25
$0.77
Q4 24
$1.34
Q3 24
$0.92
Q2 24
$0.33
Q1 24
$0.22

Balance Sheet & Financial Strength

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

Metric
MKSI
MKSI
SGU
SGU
Cash + ST InvestmentsLiquidity on hand
$418.0M
$19.9M
Total DebtLower is stronger
$4.2B
$254.8M
Stockholders' EquityBook value
$2.7B
Total Assets
$8.8B
$1.1B
Debt / EquityLower = less leverage
1.53×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
MKSI
MKSI
SGU
SGU
Q4 25
$418.0M
$19.9M
Q3 25
$413.0M
Q2 25
$498.0M
Q1 25
$407.0M
Q4 24
$420.0M
Q3 24
$439.0M
Q2 24
$506.0M
Q1 24
$1.0M
Total Debt
MKSI
MKSI
SGU
SGU
Q4 25
$4.2B
$254.8M
Q3 25
$4.3B
Q2 25
$4.4B
Q1 25
$4.4B
Q4 24
$4.5B
Q3 24
$4.8B
Q2 24
$4.8B
Q1 24
$4.7B
Stockholders' Equity
MKSI
MKSI
SGU
SGU
Q4 25
$2.7B
Q3 25
$2.6B
Q2 25
$2.6B
Q1 25
$2.4B
Q4 24
$2.3B
Q3 24
$2.4B
Q2 24
$2.2B
Q1 24
$2.4B
Total Assets
MKSI
MKSI
SGU
SGU
Q4 25
$8.8B
$1.1B
Q3 25
$8.8B
Q2 25
$8.8B
Q1 25
$8.6B
Q4 24
$8.6B
Q3 24
$9.0B
Q2 24
$8.9B
Q1 24
$8.9B
Debt / Equity
MKSI
MKSI
SGU
SGU
Q4 25
1.53×
Q3 25
1.64×
Q2 25
1.71×
Q1 25
1.87×
Q4 24
1.93×
Q3 24
1.98×
Q2 24
2.16×
Q1 24
1.94×

Cash Flow & Capital Efficiency

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

Metric
MKSI
MKSI
SGU
SGU
Operating Cash FlowLast quarter
$142.0M
$-55.2M
Free Cash FlowOCF − Capex
$92.0M
$-59.7M
FCF MarginFCF / Revenue
8.9%
-11.1%
Capex IntensityCapex / Revenue
4.8%
0.8%
Cash ConversionOCF / Net Profit
1.33×
-1.54×
TTM Free Cash FlowTrailing 4 quarters
$497.0M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
MKSI
MKSI
SGU
SGU
Q4 25
$142.0M
$-55.2M
Q3 25
$197.0M
Q2 25
$165.0M
Q1 25
$141.0M
Q4 24
$176.0M
Q3 24
$163.0M
Q2 24
$122.0M
Q1 24
$67.0M
Free Cash Flow
MKSI
MKSI
SGU
SGU
Q4 25
$92.0M
$-59.7M
Q3 25
$146.0M
Q2 25
$136.0M
Q1 25
$123.0M
Q4 24
$125.0M
Q3 24
$141.0M
Q2 24
$95.0M
Q1 24
$49.0M
FCF Margin
MKSI
MKSI
SGU
SGU
Q4 25
8.9%
-11.1%
Q3 25
14.8%
Q2 25
14.0%
Q1 25
13.1%
Q4 24
13.4%
Q3 24
15.7%
Q2 24
10.7%
Q1 24
5.6%
Capex Intensity
MKSI
MKSI
SGU
SGU
Q4 25
4.8%
0.8%
Q3 25
5.2%
Q2 25
3.0%
Q1 25
1.9%
Q4 24
5.5%
Q3 24
2.5%
Q2 24
3.0%
Q1 24
2.1%
Cash Conversion
MKSI
MKSI
SGU
SGU
Q4 25
1.33×
-1.54×
Q3 25
2.66×
Q2 25
2.66×
Q1 25
2.71×
Q4 24
1.96×
Q3 24
2.63×
Q2 24
5.30×
Q1 24
4.47×

Financial Flow Comparison

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

Revenue Breakdown by Segment

MKSI
MKSI

Electronics And Packaging$303.0M29%
Specialty Industrial$295.0M29%
Photonics Solutions Division$274.0M26%
Services$125.0M12%
Other$37.0M4%

SGU
SGU

Home Heating Oil And Propane$372.6M69%
Motor Fuel And Other Petroleum Products$75.4M14%
Equipment Installations$39.6M7%
Equipment Maintenance Service Contracts$30.3M6%
Billable Call Services$21.4M4%

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