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Side-by-side financial comparison of MKS INC (MKSI) and West Pharmaceutical Services (WST). Click either name above to swap in a different company.

MKS INC is the larger business by last-quarter revenue ($1.0B vs $805.0M, roughly 1.3× West Pharmaceutical Services). West Pharmaceutical Services runs the higher net margin — 16.4% vs 10.3%, a 6.1% gap on every dollar of revenue. On growth, MKS INC posted the faster year-over-year revenue change (10.6% vs 7.5%). West Pharmaceutical Services produced more free cash flow last quarter ($175.0M vs $92.0M). Over the past eight quarters, MKS INC's revenue compounded faster (9.1% CAGR vs 7.6%).

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.

West Pharmaceutical Services, Inc. is a designer and manufacturer of injectable pharmaceutical packaging and delivery systems. Founded in 1923 by Herman O. West and J.R. Wike of Philadelphia, the company is headquartered in Exton, Pennsylvania. In its early years of development, West produced rubber components for packaging injectable drugs, providing a sterile environment for the producers of penicillin and insulin.

MKSI vs WST — Head-to-Head

Bigger by revenue
MKSI
MKSI
1.3× larger
MKSI
$1.0B
$805.0M
WST
Growing faster (revenue YoY)
MKSI
MKSI
+3.1% gap
MKSI
10.6%
7.5%
WST
Higher net margin
WST
WST
6.1% more per $
WST
16.4%
10.3%
MKSI
More free cash flow
WST
WST
$83.0M more FCF
WST
$175.0M
$92.0M
MKSI
Faster 2-yr revenue CAGR
MKSI
MKSI
Annualised
MKSI
9.1%
7.6%
WST

Income Statement — Q4 FY2025 vs Q4 FY2025

Metric
MKSI
MKSI
WST
WST
Revenue
$1.0B
$805.0M
Net Profit
$107.0M
$132.1M
Gross Margin
46.3%
37.8%
Operating Margin
13.9%
19.5%
Net Margin
10.3%
16.4%
Revenue YoY
10.6%
7.5%
Net Profit YoY
18.9%
1.5%
EPS (diluted)
$1.58
$1.82

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
WST
WST
Q4 25
$1.0B
$805.0M
Q3 25
$988.0M
$804.6M
Q2 25
$973.0M
$766.5M
Q1 25
$936.0M
$698.0M
Q4 24
$935.0M
$748.8M
Q3 24
$896.0M
$746.9M
Q2 24
$887.0M
$702.1M
Q1 24
$868.0M
$695.4M
Net Profit
MKSI
MKSI
WST
WST
Q4 25
$107.0M
$132.1M
Q3 25
$74.0M
$140.0M
Q2 25
$62.0M
$131.8M
Q1 25
$52.0M
$89.8M
Q4 24
$90.0M
$130.1M
Q3 24
$62.0M
$136.0M
Q2 24
$23.0M
$111.3M
Q1 24
$15.0M
$115.3M
Gross Margin
MKSI
MKSI
WST
WST
Q4 25
46.3%
37.8%
Q3 25
46.7%
36.6%
Q2 25
46.6%
35.7%
Q1 25
47.4%
33.2%
Q4 24
47.3%
36.5%
Q3 24
48.2%
35.4%
Q2 24
47.2%
32.8%
Q1 24
47.8%
33.1%
Operating Margin
MKSI
MKSI
WST
WST
Q4 25
13.9%
19.5%
Q3 25
14.0%
20.8%
Q2 25
13.9%
20.1%
Q1 25
11.9%
15.3%
Q4 24
14.7%
21.3%
Q3 24
14.3%
21.6%
Q2 24
14.3%
18.0%
Q1 24
12.2%
17.7%
Net Margin
MKSI
MKSI
WST
WST
Q4 25
10.3%
16.4%
Q3 25
7.5%
17.4%
Q2 25
6.4%
17.2%
Q1 25
5.6%
12.9%
Q4 24
9.6%
17.4%
Q3 24
6.9%
18.2%
Q2 24
2.6%
15.9%
Q1 24
1.7%
16.6%
EPS (diluted)
MKSI
MKSI
WST
WST
Q4 25
$1.58
$1.82
Q3 25
$1.10
$1.92
Q2 25
$0.92
$1.82
Q1 25
$0.77
$1.23
Q4 24
$1.34
$1.78
Q3 24
$0.92
$1.85
Q2 24
$0.33
$1.51
Q1 24
$0.22
$1.55

Balance Sheet & Financial Strength

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

Metric
MKSI
MKSI
WST
WST
Cash + ST InvestmentsLiquidity on hand
$418.0M
$791.3M
Total DebtLower is stronger
$4.2B
$202.8M
Stockholders' EquityBook value
$2.7B
$3.2B
Total Assets
$8.8B
$4.3B
Debt / EquityLower = less leverage
1.53×
0.06×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
MKSI
MKSI
WST
WST
Q4 25
$418.0M
$791.3M
Q3 25
$413.0M
$628.5M
Q2 25
$498.0M
$509.7M
Q1 25
$407.0M
$404.2M
Q4 24
$420.0M
$484.6M
Q3 24
$439.0M
$490.9M
Q2 24
$506.0M
$446.2M
Q1 24
$1.0M
$601.8M
Total Debt
MKSI
MKSI
WST
WST
Q4 25
$4.2B
$202.8M
Q3 25
$4.3B
$202.7M
Q2 25
$4.4B
$202.6M
Q1 25
$4.4B
$202.6M
Q4 24
$4.5B
$202.6M
Q3 24
$4.8B
$202.6M
Q2 24
$4.8B
$205.8M
Q1 24
$4.7B
$206.2M
Stockholders' Equity
MKSI
MKSI
WST
WST
Q4 25
$2.7B
$3.2B
Q3 25
$2.6B
$3.1B
Q2 25
$2.6B
$2.9B
Q1 25
$2.4B
$2.7B
Q4 24
$2.3B
$2.7B
Q3 24
$2.4B
$2.8B
Q2 24
$2.2B
$2.6B
Q1 24
$2.4B
$2.7B
Total Assets
MKSI
MKSI
WST
WST
Q4 25
$8.8B
$4.3B
Q3 25
$8.8B
$4.1B
Q2 25
$8.8B
$4.0B
Q1 25
$8.6B
$3.6B
Q4 24
$8.6B
$3.6B
Q3 24
$9.0B
$3.7B
Q2 24
$8.9B
$3.5B
Q1 24
$8.9B
$3.6B
Debt / Equity
MKSI
MKSI
WST
WST
Q4 25
1.53×
0.06×
Q3 25
1.64×
0.07×
Q2 25
1.71×
0.07×
Q1 25
1.87×
0.08×
Q4 24
1.93×
0.08×
Q3 24
1.98×
0.07×
Q2 24
2.16×
0.08×
Q1 24
1.94×
0.08×

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
WST
WST
Operating Cash FlowLast quarter
$142.0M
$251.1M
Free Cash FlowOCF − Capex
$92.0M
$175.0M
FCF MarginFCF / Revenue
8.9%
21.7%
Capex IntensityCapex / Revenue
4.8%
9.5%
Cash ConversionOCF / Net Profit
1.33×
1.90×
TTM Free Cash FlowTrailing 4 quarters
$497.0M
$468.9M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
MKSI
MKSI
WST
WST
Q4 25
$142.0M
$251.1M
Q3 25
$197.0M
$197.2M
Q2 25
$165.0M
$177.1M
Q1 25
$141.0M
$129.4M
Q4 24
$176.0M
$190.1M
Q3 24
$163.0M
$180.1M
Q2 24
$122.0M
$165.0M
Q1 24
$67.0M
$118.2M
Free Cash Flow
MKSI
MKSI
WST
WST
Q4 25
$92.0M
$175.0M
Q3 25
$146.0M
$133.9M
Q2 25
$136.0M
$101.9M
Q1 25
$123.0M
$58.1M
Q4 24
$125.0M
$85.2M
Q3 24
$141.0M
$98.8M
Q2 24
$95.0M
$64.8M
Q1 24
$49.0M
$27.6M
FCF Margin
MKSI
MKSI
WST
WST
Q4 25
8.9%
21.7%
Q3 25
14.8%
16.6%
Q2 25
14.0%
13.3%
Q1 25
13.1%
8.3%
Q4 24
13.4%
11.4%
Q3 24
15.7%
13.2%
Q2 24
10.7%
9.2%
Q1 24
5.6%
4.0%
Capex Intensity
MKSI
MKSI
WST
WST
Q4 25
4.8%
9.5%
Q3 25
5.2%
7.9%
Q2 25
3.0%
9.8%
Q1 25
1.9%
10.2%
Q4 24
5.5%
14.0%
Q3 24
2.5%
10.9%
Q2 24
3.0%
14.3%
Q1 24
2.1%
13.0%
Cash Conversion
MKSI
MKSI
WST
WST
Q4 25
1.33×
1.90×
Q3 25
2.66×
1.41×
Q2 25
2.66×
1.34×
Q1 25
2.71×
1.44×
Q4 24
1.96×
1.46×
Q3 24
2.63×
1.32×
Q2 24
5.30×
1.48×
Q1 24
4.47×
1.03×

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%

WST
WST

Proprietary Products$661.8M82%
Contract Manufactured Products$143.2M18%
Affiliated Entity$3.3M0%

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