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Watts Water Technologies vs ZK International: revenue, profit, margins and growth compared

Watts Water Technologies brought in $2.4B of revenue in fiscal 2025, ZK International $71.2M in fiscal 2025. Revenue changed by +8.3% at Watts Water Technologies and -34.2% at ZK International on the year before, so Watts Water Technologies grew faster. Watts Water Technologies kept 14.0% of its revenue as net profit, ZK International -5.6%. Free cash flow was $356.3M at Watts Water Technologies and $147.8K at ZK International.

Side by side, latest fiscal year

WTSZKIN
Fiscal year endedFY2025 (December 31, 2025)FY2025 (September 30, 2025)
Revenue$2.4B$71.2M
Revenue growth+8.3%-34.2%
Net income$340.8M-$4M
Net margin14.0%-5.6%
Free cash flow$356.3M$147.8K
Free cash flow margin14.6%0.2%
Earnings per share (diluted)$10.17-$0.70
Cash$405.5M$2.3M
Debt$197.7Mn/a
Price to earnings35.2n/a
Market value$11.9Bn/a
Dividend yield0.56%n/a
Rank by revenue in sector#204 of 518 · Industrials#403 of 518 · Industrials

Over the years

Revenue
WTS FY2018: $1.6BWTS FY2019: $1.6BWTS FY2020: $1.5BWTS FY2021: $1.8BWTS FY2022: $2BWTS FY2023: $2.1BWTS FY2024: $2.3BWTS FY2025: $2.4BZKIN FY2018: $54.9MZKIN FY2019: $63.9MZKIN FY2020: $86.8MZKIN FY2021: $99.4MZKIN FY2022: $102.4MZKIN FY2023: $111.6MZKIN FY2024: $108.2MZKIN FY2025: $71.2MFY18FY19FY20FY21FY22FY23FY24FY25
WTS $2.4BZKIN $71.2M
Net income
WTS FY2018: $128MWTS FY2019: $131.5MWTS FY2020: $114.3MWTS FY2021: $165.7MWTS FY2022: $251.5MWTS FY2023: $262.1MWTS FY2024: $291.2MWTS FY2025: $340.8MZKIN FY2018: $7MZKIN FY2019: $8.1MZKIN FY2020: -$825.6KZKIN FY2021: -$3.8MZKIN FY2022: -$6.1MZKIN FY2023: -$61.1MZKIN FY2024: -$2.8MZKIN FY2025: -$4MFY18FY19FY20FY21FY22FY23FY24FY25
WTS $340.8MZKIN -$4M
Net margin
WTS FY2018: 8.2%WTS FY2019: 8.2%WTS FY2020: 7.6%WTS FY2021: 9.2%WTS FY2022: 12.7%WTS FY2023: 12.7%WTS FY2024: 12.9%WTS FY2025: 14.0%ZKIN FY2018: 12.8%ZKIN FY2019: 12.7%ZKIN FY2020: -1.0%ZKIN FY2021: -3.8%ZKIN FY2022: -5.9%ZKIN FY2023: -54.7%ZKIN FY2024: -2.6%ZKIN FY2025: -5.6%FY18FY19FY20FY21FY22FY23FY24FY25
WTS 14.0%ZKIN -5.6%
Revenue growth
WTS FY2019: +2.3%WTS FY2020: -5.7%WTS FY2021: +19.9%WTS FY2022: +9.4%WTS FY2023: +3.9%WTS FY2024: +9.5%WTS FY2025: +8.3%ZKIN FY2019: +16.4%ZKIN FY2020: +35.9%ZKIN FY2021: +14.5%ZKIN FY2022: +3.0%ZKIN FY2023: +9.0%ZKIN FY2024: -3.0%ZKIN FY2025: -34.2%FY19FY20FY21FY22FY23FY24FY25
WTS +8.3%ZKIN -34.2%
Free cash flow
WTS FY2018: $133.5MWTS FY2019: $164.8MWTS FY2020: $185MWTS FY2021: $154.1MWTS FY2022: $195.9MWTS FY2023: $281.1MWTS FY2024: $325.8MWTS FY2025: $356.3MZKIN FY2018: -$3.1MZKIN FY2019: $7.6MZKIN FY2020: -$708.1KZKIN FY2021: -$3.6MZKIN FY2022: -$2.6MZKIN FY2023: -$2.6MZKIN FY2024: -$7.5MZKIN FY2025: $147.8KFY18FY19FY20FY21FY22FY23FY24FY25
WTS $356.3MZKIN $147.8K

Fiscal years as each company reports them; the two may end in different months.

Questions about Watts Water Technologies and ZK International

Which is bigger by revenue, Watts Water Technologies or ZK International?

Watts Water Technologies is bigger by revenue: $2.4B in fiscal 2025, against $71.2M for ZK International in fiscal 2025.

Which keeps more of its revenue as profit, Watts Water Technologies or ZK International?

Watts Water Technologies had a net margin of 14.0% in fiscal 2025; ZK International had -5.6% in fiscal 2025.

Which grew revenue faster, Watts Water Technologies or ZK International?

In their latest fiscal years revenue changed by +8.3% at Watts Water Technologies and -34.2% at ZK International.

Where do these numbers come from?

From the annual reports each company files with the SEC (10-K, or 20-F and 40-F for foreign companies), read from their XBRL data. Margins and growth are simple arithmetic on those figures. Nothing here is a recommendation.

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