1. Apple Ireland

Apple designs and creates iPods and iTunes, Mac laptops and desktop computers, the OS X operating system, and the iPhone. The company first established operations in Ireland in 1980. The company is based in Cork and currently employs about 6,000 people . CEO of Apple ...

2. Google

Google Ireland is the Europe, Middle East and Africa (EMEA) headquarters for Google and provides technical, sales and operations support to customers in over 50 countries.

3. Microsoft

Microsoft Ireland Operations Ltd is a subsidiary of the software giant Microsoft which sells, distributes and markets software globally from Dublin. Microsoft, the world’s biggest software company, established an Irish manufacturing facility in 1985 and now employs ...

4. Meta Ireland

Founded in 2004, Meta (Facebook) is a social utility that connects people with friends and others who work, study and live around them.

5. CRH

CRH plc is an international building materials group. The group was formed through a merger in 1970 of two leading Irish public companies, Cement Limited (established in 1936) and Roadstone Limited (1949). It is headquartered in Dublin.

6. Medtronic plc

The medical device company Medtronic-Covidien became the largest Ireland-based company when it began trading on the New York Stock Exchange in 2015. Following Medtronic Inc’s $49.9 billion acquisition of Dublin-domiciled surgical supplies group Covidien, the Minneapol...

7. DCC

DCC is an international sales, marketing and support services group, supplying essential products and services used by millions of people every day across energy, healthcare and technology. It employs some 13,700 people across 20 countries and operates across four div...

8. Johnson Controls

Headquartered in Cork, Johnson Controls is a global diversified technology and multi industrial leader serving a wide range of customers in more than 150 countries.

9. Eaton Corp

Eaton is a power management company that provides energy-efficient solutions that help its customers effectively manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. Eaton has approximately 97,000 employees worldwide and sells prod...

10. Dell Ireland

Since 1984, Dell has been an end-to-end computing solutions company. With more than 100,000 team members across the globe, Dell serves customers ranging from the world's largest businesses and public-sector organisations, to small and medium businesses, and individual c...

11. Trane Technologies

Formerly Ingersoll-Rand, Trane Technologies was formed in early 2020 when part of the business separated and combined with Gardner Denver (which now trades as Ingersoll Rand Inc). Trane is listed on the NYSE. The industrial techology firm makes climate control system...

12. MSD

MSD Ireland is one of the country’s leading healthcare companies, having first established here over 50 years ago. MSD, known as Merck & Co. Inc., Kenilworth, NJ, USA in the US and Canada, has operations in more than 140 countries and employs over 2,800 people in Irelan...

13. Smurfit Kappa

Smurfit Kappa is one of the leading producers of paper-based packaging in the world. Its products include containerboard, solid board, corrugated and solid board packaging, graphic board and sack paper. The group's headquarters are in Clonskeagh in Dublin 4 and i...

14. Pfizer

Pfizer is a research-based pharmaceutical multinational. The company was one of the first pharmaceutical companies to locate in Ireland (1969). The Irish operations manufacture some of Pfizer’s best-selling and newest medicines including Viagra (urology), Sutent (oncolo...

15. Oracle

The principal activity of Oracle EMEA Ltd is the manufacture and sale of computer software in the European market, together with the provision of associated translation, finance and marketing services. Oracle Corporation, incorporated in 2005, is an enterprise softw...

16. Kerry Group

Kerry Group today provides food, food ingredients and flavours to the Irish and UK markets. Since the commissioning of its first dairy and ingredients plant in Listowel, Co Kerry in 1972, the company has grown to achieve current annualised sales of approximately €5.8 bi...

17. Flutter

Betting and gaming group Paddy Power is a global plc headquartered in Ireland. In 2015 it merged with UK group Betfair to form a €10 billion gambling business with operations in Ireland, Europe, Australia and the US.

18. Ardagh Glass Sales

Ardagh Glass Sales is the Irish-based sales company of the Ardagh Group, which operates 100 metal glass and technology facilities across 25 countries employing 18,000 people. It has a number of finance companies based in Ireland as well as Ardagh Glass Sales. The A...

19. Kingspan

Kingspan manufactures insulation and building envelope solutions for the construction industry. It is based in Ireland but has operations in western and eastern Europe, the United States, India, Australasia and the Middle East.

20. Total Produce

In July 2021 Total Produce and Dole Food Company joined forces to create the premier global leader in fresh produce.