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2874 companies · fiscal year 2025 · SEC EDGAR · September 25, 2026

Companies in Ireland with the highest operating margin

Operating margin is operating income divided by revenue. Only companies with at least $1 billion in revenue are ranked here. Figures are for fiscal year 2025 and are read directly from each company's SEC filings; the source column on every row links to the document.

Ranks 1–16 of 16 · Fiscal year 2025 · Data as of September 25, 2026

Only companies with at least $1bn in revenue are ranked.

Aon (AON) tops the list with 25.3% in operating margin for fiscal 2025, ahead of PDD Holdings (21.6%) and Trane Technologies (18.6%). Across the top 10, operating margin ranges from 25.3% down to 14.5%. 16 companies in Ireland report operating margin, 1.1% of the 1486-filer universe. The last place on the list, Dole, comes in at 2.4%.

Operating margin
#CompanyOperating marginYoY15-year trend
1AonAONIEFinancials25.3%+3.5%
2PDD HoldingsPDDIETechnology21.6%−21.7%
3Trane TechnologiesTTIETechnology18.6%+5.5%
4TE ConnectivityTELIEIndustrials18.6%+5.4%
5SterisSTEIEHealthcare18.6%+16.9%
6EatonETNIEIndustrials18.0%−2.1%
7MedtronicMDTIEHealthcare17.8%+0.2%
8AlkermesALKSIEHealthcare17.2%−36.3%
9AccentureACNIETechnology14.7%−0.7%
10CRH PublicCRHIEMaterials14.5%+4.9%
11James Hardie IndustriesJHXIEMaterials9.3%−45.3%
12Johnson Controls InternationalJCIIEIndustrials8.3%+25.8%
13CimpressCMPRIECommunication services6.6%−11.5%
14Smurfit WestRockSWIEMaterials5.5%+15.6%
15IconICLRIEHealthcare5.4%−57.4%
16DoleDOLEIEConsumer staples2.4%−26.6%

All figures from SEC filings · FY2025 · 16

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{{cite web |title=Companies in Ireland with the highest operating margin |url=https://companiesranked.com/en/companies-with-the-highest-operating-margin-in-ireland |website=CompaniesRanked |date=2026-09-25 |language=en}}

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@misc{companiesranked-en-companies-with-the-highest-operating-margin-in-ireland-2026,
  author       = {{CompaniesRanked}},
  title        = {{Companies in Ireland with the highest operating margin}},
  year         = {2026},
  howpublished = {\url{https://companiesranked.com/en/companies-with-the-highest-operating-margin-in-ireland}},
  note         = {Compiled from SEC EDGAR XBRL filings; data as of 2026-09-25},
  urldate      = {2026-09-25}
}

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