Ireland

Top 86 largest Irish Companies by Market Cap

This is the list of the largest public listed companies from Ireland by market capitalization with links to their reference stock, sector and industry.

Ireland Market Analysis
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Top Companies from Ireland as of Jan. 01, 2025

Rank Company Market Cap (USD) Country Sector Industry
1 Accenture plc $227.21 B Ireland Irish Technology Irish Information Technology Services
2 Eaton Corporation plc $146.10 B Ireland Irish Industrials Irish Specialty Industrial Machinery
3 Medtronic plc $114.44 B Ireland Irish Healthcare Irish Medical Devices
4 Trane Technologies plc $89.87 B Ireland Irish Industrials Irish Specialty Industrial Machinery
5 Aon Plc $78.87 B Ireland Irish Financials Irish Insurance Brokers
6 CRH plc $67.71 B Ireland Irish Basic Materials Irish Building Materials
7 Johnson Controls International plc $54.15 B Ireland Irish Industrials Irish Engineering & Construction
8 Experian plc $43.54 B Ireland Irish Industrials Irish Consulting Services
9 Flutter Entertainment plc $31.25 B

(Jan. 1, 2024)

 Ireland Irish Consumer Discretionary Irish Gambling
10 Horizon Therapeutics Public Limited Company $26.63 B Ireland Irish Healthcare Irish Drug Manufacturers—General
11 Seagate Technology plc $22.93 B Ireland Irish Technology Irish Computer Hardware
12 STERIS plc $21.44 B Ireland Irish Healthcare Irish Medical Instruments & Supplies
13 Ryanair Holdings plc $18.18 B

(Dec. 1, 2021)

 Ireland Irish Industrials Irish Airlines
14 AerCap Holdings N.V. $18.08 B Ireland Irish Industrials Irish Airports & Air Services
15 ICON Public Limited Company $16.73 B Ireland Irish Healthcare Irish Diagnostics & Research
16 Kerry Group plc $16.08 B Ireland Irish Consumer Staples Irish Packaged Foods
17 Aptiv PLC $15.02 B Ireland Irish Consumer Discretionary Irish Auto Parts
18 James Hardie Industries plc $13.46 B

(July 1, 2024)

 Ireland Irish Basic Materials Irish Building Materials
19 AIB Group plc $13.25 B Ireland Irish Financials Irish Banks—Regional
20 Kingspan Group plc $13.03 B Ireland Irish Industrials Irish Building Products & Equipment
21 Smurfit Kappa Group plc $11.62 B

(July 1, 2024)

 Ireland Irish Consumer Discretionary Irish Packaging & Containers
22 Allegion plc $11.58 B Ireland Irish Industrials Irish Security & Protection Services
23 Bank of Ireland Group plc $9.50 B Ireland Irish Financials Irish Banks—Regional
24 Jazz Pharmaceuticals plc $7.40 B Ireland Irish Healthcare Irish Biotechnology
25 DCC plc $6.74 B Ireland Irish Energy Irish Oil & Gas Refining & Marketing
26 Alkermes plc $5.14 B Ireland Irish Healthcare Irish Biotechnology
27 UDG Healthcare plc $3.77 B

(Aug. 1, 2021)

 Ireland Irish Healthcare Irish Medical Care Facilities
28 Glanbia plc $3.76 B Ireland Irish Consumer Staples Irish Packaged Foods
29 Perrigo Company plc $3.38 B Ireland Irish Healthcare Irish Drug Manufacturers—Specialty & Generic
30 Keywords Studios plc $2.42 B

(July 1, 2024)

 Ireland Irish Communication Services Irish Electronic Gaming & Multimedia

Top Companies from Ireland as of Jan. 01, 2025

1. Accenture

Company Profile: Accenture plc
Market Cap (USD): $227.21 B
Country: Ireland
Sector: Irish Technology
Industry: Irish Information Technology Services

2. Eaton Corporation plc

Company Profile: Eaton Corporation plc
Market Cap (USD): $146.10 B
Country: Ireland
Sector: Irish Industrials
Industry: Irish Specialty Industrial Machinery

3. Medtronic

Company Profile: Medtronic plc
Market Cap (USD): $114.44 B
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Medical Devices

4. Trane Technologies plc

Company Profile: Trane Technologies plc
Market Cap (USD): $89.87 B
Country: Ireland
Sector: Irish Industrials
Industry: Irish Specialty Industrial Machinery

5. Aon Plc

Company Profile: Aon Plc
Market Cap (USD): $78.87 B
Country: Ireland
Sector: Irish Financials
Industry: Irish Insurance Brokers

6. CRH plc

Company Profile: CRH plc
Market Cap (USD): $67.71 B
Country: Ireland
Sector: Irish Basic Materials
Industry: Irish Building Materials

7. Johnson Controls International plc

Company Profile: Johnson Controls International plc
Market Cap (USD): $54.15 B
Country: Ireland
Sector: Irish Industrials
Industry: Irish Engineering & Construction

8. Experian plc

Company Profile: Experian plc
Market Cap (USD): $43.54 B
Country: Ireland
Sector: Irish Industrials
Industry: Irish Consulting Services

9. Flutter Entertainment plc

Company Profile: Flutter Entertainment plc
Market Cap (USD): $31.25 B (Jan. 1, 2024)
Country: Ireland
Sector: Irish Consumer Discretionary
Industry: Irish Gambling

10. Horizon Therapeutics Public Limited Company

Company Profile: Horizon Therapeutics Public Limited Company
Market Cap (USD): $26.63 B
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Drug Manufacturers—General

11. Seagate Technology plc

Company Profile: Seagate Technology plc
Market Cap (USD): $22.93 B
Country: Ireland
Sector: Irish Technology
Industry: Irish Computer Hardware

12. STERIS plc

Company Profile: STERIS plc
Market Cap (USD): $21.44 B
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Medical Instruments & Supplies

13. Ryanair Holdings plc

Company Profile: Ryanair Holdings plc
Market Cap (USD): $18.18 B (Dec. 1, 2021)
Country: Ireland
Sector: Irish Industrials
Industry: Irish Airlines

14. AerCap Holdings N.V.

Company Profile: AerCap Holdings N.V.
Market Cap (USD): $18.08 B
Country: Ireland
Sector: Irish Industrials
Industry: Irish Airports & Air Services

15. ICON Public Limited Company

Company Profile: ICON Public Limited Company
Market Cap (USD): $16.73 B
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Diagnostics & Research

16. Kerry Group plc

Company Profile: Kerry Group plc
Market Cap (USD): $16.08 B
Country: Ireland
Sector: Irish Consumer Staples
Industry: Irish Packaged Foods

17. Aptiv PLC

Company Profile: Aptiv PLC
Market Cap (USD): $15.02 B
Country: Ireland
Sector: Irish Consumer Discretionary
Industry: Irish Auto Parts

18. James Hardie Industries plc

Company Profile: James Hardie Industries plc
Market Cap (USD): $13.46 B (July 1, 2024)
Country: Ireland
Sector: Irish Basic Materials
Industry: Irish Building Materials

19. AIB Group plc

Company Profile: AIB Group plc
Market Cap (USD): $13.25 B
Country: Ireland
Sector: Irish Financials
Industry: Irish Banks—Regional

20. Kingspan Group plc

Company Profile: Kingspan Group plc
Market Cap (USD): $13.03 B
Country: Ireland
Sector: Irish Industrials
Industry: Irish Building Products & Equipment

21. Smurfit Kappa Group plc

Company Profile: Smurfit Kappa Group plc
Market Cap (USD): $11.62 B (July 1, 2024)
Country: Ireland
Sector: Irish Consumer Discretionary
Industry: Irish Packaging & Containers

22. Allegion plc

Company Profile: Allegion plc
Market Cap (USD): $11.58 B
Country: Ireland
Sector: Irish Industrials
Industry: Irish Security & Protection Services

23. Bank of Ireland Group plc

Company Profile: Bank of Ireland Group plc
Market Cap (USD): $9.50 B
Country: Ireland
Sector: Irish Financials
Industry: Irish Banks—Regional

24. Jazz Pharmaceuticals plc

Company Profile: Jazz Pharmaceuticals plc
Market Cap (USD): $7.40 B
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Biotechnology

25. DCC plc

Company Profile: DCC plc
Market Cap (USD): $6.74 B
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas Refining & Marketing

26. Alkermes plc

Company Profile: Alkermes plc
Market Cap (USD): $5.14 B
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Biotechnology

27. UDG Healthcare plc

Company Profile: UDG Healthcare plc
Market Cap (USD): $3.77 B (Aug. 1, 2021)
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Medical Care Facilities

28. Glanbia plc

Company Profile: Glanbia plc
Market Cap (USD): $3.76 B
Country: Ireland
Sector: Irish Consumer Staples
Industry: Irish Packaged Foods

29. Perrigo Company plc

Company Profile: Perrigo Company plc
Market Cap (USD): $3.38 B
Country: Ireland
Sector: Irish Healthcare
Industry: Irish Drug Manufacturers—Specialty & Generic

30. Keywords Studios plc

Company Profile: Keywords Studios plc
Market Cap (USD): $2.42 B (July 1, 2024)
Country: Ireland
Sector: Irish Communication Services
Industry: Irish Electronic Gaming & Multimedia

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