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Side-by-side financial comparison of MKS INC (MKSI) and WATTS WATER TECHNOLOGIES INC (WTS). Click either name above to swap in a different company.

MKS INC is the larger business by last-quarter revenue ($1.0B vs $625.1M, roughly 1.7× WATTS WATER TECHNOLOGIES INC). WATTS WATER TECHNOLOGIES INC runs the higher net margin — 13.4% vs 10.3%, a 3.0% gap on every dollar of revenue. On growth, WATTS WATER TECHNOLOGIES INC posted the faster year-over-year revenue change (15.7% vs 10.6%). WATTS WATER TECHNOLOGIES INC produced more free cash flow last quarter ($140.3M vs $92.0M). Over the past eight quarters, MKS INC's revenue compounded faster (9.1% CAGR vs 4.6%).

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.

AERCO International, Inc. is a manufacturer and supplier of commercial condensing boilers, high efficiency water heating equipment and energy recovery systems in the HVAC/plumbing industry across a variety of markets including education, lodging, government, office buildings, healthcare, industrial and multifamily housing. In 1949, AERCO introduced the industry's first semi-instantaneous, tankless steam-to-water water heater. In 1988, AERCO introduced the first condensing and fully modulating...

MKSI vs WTS — Head-to-Head

Bigger by revenue
MKSI
MKSI
1.7× larger
MKSI
$1.0B
$625.1M
WTS
Growing faster (revenue YoY)
WTS
WTS
+5.1% gap
WTS
15.7%
10.6%
MKSI
Higher net margin
WTS
WTS
3.0% more per $
WTS
13.4%
10.3%
MKSI
More free cash flow
WTS
WTS
$48.3M more FCF
WTS
$140.3M
$92.0M
MKSI
Faster 2-yr revenue CAGR
MKSI
MKSI
Annualised
MKSI
9.1%
4.6%
WTS

Income Statement — Q4 FY2025 vs Q4 FY2025

Metric
MKSI
MKSI
WTS
WTS
Revenue
$1.0B
$625.1M
Net Profit
$107.0M
$83.7M
Gross Margin
46.3%
49.5%
Operating Margin
13.9%
18.2%
Net Margin
10.3%
13.4%
Revenue YoY
10.6%
15.7%
Net Profit YoY
18.9%
24.0%
EPS (diluted)
$1.58
$2.50

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
WTS
WTS
Q4 25
$1.0B
$625.1M
Q3 25
$988.0M
$611.7M
Q2 25
$973.0M
$643.7M
Q1 25
$936.0M
$558.0M
Q4 24
$935.0M
$540.4M
Q3 24
$896.0M
$543.6M
Q2 24
$887.0M
$597.3M
Q1 24
$868.0M
$570.9M
Net Profit
MKSI
MKSI
WTS
WTS
Q4 25
$107.0M
$83.7M
Q3 25
$74.0M
$82.2M
Q2 25
$62.0M
$100.9M
Q1 25
$52.0M
$74.0M
Q4 24
$90.0M
$67.5M
Q3 24
$62.0M
$69.1M
Q2 24
$23.0M
$82.0M
Q1 24
$15.0M
$72.6M
Gross Margin
MKSI
MKSI
WTS
WTS
Q4 25
46.3%
49.5%
Q3 25
46.7%
48.8%
Q2 25
46.6%
50.6%
Q1 25
47.4%
48.8%
Q4 24
47.3%
46.7%
Q3 24
48.2%
47.3%
Q2 24
47.2%
47.7%
Q1 24
47.8%
46.9%
Operating Margin
MKSI
MKSI
WTS
WTS
Q4 25
13.9%
18.2%
Q3 25
14.0%
18.2%
Q2 25
13.9%
21.0%
Q1 25
11.9%
15.7%
Q4 24
14.7%
16.5%
Q3 24
14.3%
17.1%
Q2 24
14.3%
18.7%
Q1 24
12.2%
16.9%
Net Margin
MKSI
MKSI
WTS
WTS
Q4 25
10.3%
13.4%
Q3 25
7.5%
13.4%
Q2 25
6.4%
15.7%
Q1 25
5.6%
13.3%
Q4 24
9.6%
12.5%
Q3 24
6.9%
12.7%
Q2 24
2.6%
13.7%
Q1 24
1.7%
12.7%
EPS (diluted)
MKSI
MKSI
WTS
WTS
Q4 25
$1.58
$2.50
Q3 25
$1.10
$2.45
Q2 25
$0.92
$3.01
Q1 25
$0.77
$2.21
Q4 24
$1.34
$2.02
Q3 24
$0.92
$2.06
Q2 24
$0.33
$2.44
Q1 24
$0.22
$2.17

Balance Sheet & Financial Strength

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

Metric
MKSI
MKSI
WTS
WTS
Cash + ST InvestmentsLiquidity on hand
$418.0M
$405.5M
Total DebtLower is stronger
$4.2B
Stockholders' EquityBook value
$2.7B
$2.0B
Total Assets
$8.8B
$2.9B
Debt / EquityLower = less leverage
1.53×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
MKSI
MKSI
WTS
WTS
Q4 25
$418.0M
$405.5M
Q3 25
$413.0M
$457.7M
Q2 25
$498.0M
$369.3M
Q1 25
$407.0M
$336.8M
Q4 24
$420.0M
$386.9M
Q3 24
$439.0M
$303.9M
Q2 24
$506.0M
$279.4M
Q1 24
$1.0M
$237.1M
Total Debt
MKSI
MKSI
WTS
WTS
Q4 25
$4.2B
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
WTS
WTS
Q4 25
$2.7B
$2.0B
Q3 25
$2.6B
$2.0B
Q2 25
$2.6B
$1.9B
Q1 25
$2.4B
$1.8B
Q4 24
$2.3B
$1.7B
Q3 24
$2.4B
$1.7B
Q2 24
$2.2B
$1.6B
Q1 24
$2.4B
$1.6B
Total Assets
MKSI
MKSI
WTS
WTS
Q4 25
$8.8B
$2.9B
Q3 25
$8.8B
$2.7B
Q2 25
$8.8B
$2.6B
Q1 25
$8.6B
$2.5B
Q4 24
$8.6B
$2.4B
Q3 24
$9.0B
$2.4B
Q2 24
$8.9B
$2.4B
Q1 24
$8.9B
$2.3B
Debt / Equity
MKSI
MKSI
WTS
WTS
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
WTS
WTS
Operating Cash FlowLast quarter
$142.0M
$154.7M
Free Cash FlowOCF − Capex
$92.0M
$140.3M
FCF MarginFCF / Revenue
8.9%
22.4%
Capex IntensityCapex / Revenue
4.8%
2.3%
Cash ConversionOCF / Net Profit
1.33×
1.85×
TTM Free Cash FlowTrailing 4 quarters
$497.0M
$356.3M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
MKSI
MKSI
WTS
WTS
Q4 25
$142.0M
$154.7M
Q3 25
$197.0M
$122.4M
Q2 25
$165.0M
$69.7M
Q1 25
$141.0M
$55.2M
Q4 24
$176.0M
$139.5M
Q3 24
$163.0M
$90.7M
Q2 24
$122.0M
$85.3M
Q1 24
$67.0M
$45.6M
Free Cash Flow
MKSI
MKSI
WTS
WTS
Q4 25
$92.0M
$140.3M
Q3 25
$146.0M
$110.9M
Q2 25
$136.0M
$59.5M
Q1 25
$123.0M
$45.6M
Q4 24
$125.0M
$127.5M
Q3 24
$141.0M
$84.3M
Q2 24
$95.0M
$78.5M
Q1 24
$49.0M
$35.5M
FCF Margin
MKSI
MKSI
WTS
WTS
Q4 25
8.9%
22.4%
Q3 25
14.8%
18.1%
Q2 25
14.0%
9.2%
Q1 25
13.1%
8.2%
Q4 24
13.4%
23.6%
Q3 24
15.7%
15.5%
Q2 24
10.7%
13.1%
Q1 24
5.6%
6.2%
Capex Intensity
MKSI
MKSI
WTS
WTS
Q4 25
4.8%
2.3%
Q3 25
5.2%
1.9%
Q2 25
3.0%
1.6%
Q1 25
1.9%
1.7%
Q4 24
5.5%
2.2%
Q3 24
2.5%
1.2%
Q2 24
3.0%
1.1%
Q1 24
2.1%
1.8%
Cash Conversion
MKSI
MKSI
WTS
WTS
Q4 25
1.33×
1.85×
Q3 25
2.66×
1.49×
Q2 25
2.66×
0.69×
Q1 25
2.71×
0.75×
Q4 24
1.96×
2.07×
Q3 24
2.63×
1.31×
Q2 24
5.30×
1.04×
Q1 24
4.47×
0.63×

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%

WTS
WTS

Segment breakdown not available.

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