The short version

From the latest prices and each company's SEC filings. Who's ahead on each measure, not which to buy.

  • Donaldson Company is the larger company, worth $9.8B, close to Pentair's $8.3B.
  • Donaldson Company grew revenue faster over the last year (+8.0% vs +2.6%).
  • Pentair keeps more of each dollar of revenue as operating profit (20.6% vs 15.4%).
  • On earnings, Pentair is the cheaper stock (12.9x vs 26.5x).
  • Donaldson Company's price assumes faster free cash flow growth: about 7% a year, against -3% for Pentair (reverse DCF).

Side by side

The stronger figure is shaded where higher (or, for valuation multiples, lower) reads as better. How the implied growth works.

MeasureDCIPNR
Market cap$9.8B$8.3B
Share price$86.93$52.47
Revenue (last fiscal year)$3.9B$4.2B
Free cash flow (last fiscal year)$426M$746M
Revenue growth, last year+8.0%+2.6%
Revenue growth per year, last 5 fiscal years+4.1%+2.6%
Operating margin15.4%20.6%
Net margin11.7%16.0%
Return on equity25.7%17.6%
P/E (trailing)26.5x12.9x
Price / free cash flow28.9x11.1x
EV / EBITDA14.8x12.6x
FCF growth the price implies6.9%-2.8%
Dividend yield1.4%2.0%
Debt / equity1.26x0.86x
Fundamental gradeBB
Superinvestors holding it52
Insider purchases, last 12 months02

Results from SEC filings

Revenue and free cash flow by fiscal year, from each company's 10-K filings.

Donaldson Company

YearRevenueFree cash flowOp. margin
2022$3.3B$167M13.4%
2023$3.4B$426M14.0%
2024$3.6B$407M15.2%
2025$3.7B$340M13.4%
2026$3.9B$426M15.4%

Pentair

YearRevenueFree cash flowOp. margin
2021$3.8B$553M16.9%
2022$4.1B$278M14.4%
2023$4.1B$543M18.0%
2024$4.1B$692M19.7%
2025$4.2B$746M20.5%

Where the revenue comes from

Donaldson Company · by segments, 2026

Mobile Solutions Segment$2.4B62%
Industrial Solutions Segment$1.1B29%
Life Sciences Segment$333M9%

Pentair · by segments, 2025

Pool$1.6B37%
Flow$1.6B37%
Water Solutions$1.1B25%
Compare them in fullFifteen years of statements, quarterly results, DCF and IRR models, and any number of peers side by side.
Open DCI in Investingly

Questions

Which is bigger, Donaldson Company or Pentair?

Donaldson Company (DCI), at $9.8B against $8.3B.

Is DCI or PNR cheaper?

By trailing P/E, Pentair (12.9x) is cheaper than Donaldson Company (26.5x). A lower multiple can also mean the market expects less growth.

Which grows faster, DCI or PNR?

Donaldson Company: revenue grew +8.0% over the last year, against +2.6%.

Prices and ratios as of the last daily update; statements from SEC filings. Information only, not investment advice.