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. 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 ...

3. 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...

4. 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.

5. 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.

6. 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...

7. Adobe

Adobe Software Trading Company Limited, based in Citywest in Dublin, operates as a subsidiary of Adobe Systems Inc. Founded in 1982 and with headquarters in San Jose, California, Adobe Systems Inc makes software including Adobe Flash Player, Adobe Reader and Adobe AI...

8. 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...

9. Ryanair

Every year Ryanair carries over 113 million passengers connecting 200 destinations in 33 countries on a fleet of 350 Boeing 737 aircraft based at 84 different European airports. With a further 350 Boeing 737s on order, Ryanair plans to lower fares and grow traffic to ov...

10. Alexion Pharmaceuticals

Headquartered in Cheshire, Connecticut (USA), Alexion is global biopharmaceutical company focused on the development and delivery of life-transforming therapies for patients with severe and life-threatening rare disorders.

11. 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.

12. Citibank

Citi was one of the first international banks to set up a branch in Ireland with a continuous presence here since 1965. They offer a range of financial services and products including cash management, derivatives, investor products, corporate finance, trade services, c...

13. Central Bank

The Central Bank Reform Act 2010 created a single unitary body, the Central Bank of Ireland, responsible for both central banking and financial regulation. The Act commenced on October 1st 2010. This structure replaced the previous related entities, the Financial Serv...

14. Bank of Ireland

Bank of Ireland is a diversified financial services group established in 1783 by royal charter. It operates across a range of sectors, including retail, insurance, corporate and commercial. It is listed on the Irish Stock Exchange and the government holds a 14 per ce...

15. Aercap Ireland

AerCap engages in aircraft leasing and aviation finance. With approximately $11 billion of assets, AerCap is funded by a robust long-term capital structure that produces industry-leading profitability. Headquartered in the Netherlands, and with offices in Ireland, th...

16. AIB

AIB conducts its business through three major operating division: AIB Bank ROI, Capital Markets and AIB Bank UK. AIB ROI covers retail and business banking operations in the Republic of Ireland, Channel Islands and Isle of Man, in addition to asset finance, wealth ma...

17. Experian

Experian plc is a global information services group with operations in 40 countries, with corporate headquarters in Dublin, Republic of Ireland and operational headquarters in Nottingham, United Kingdom.

18. 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.

19. NortonLifeLock

Internet security technology group NortonLifeLock (formerly Symantec) provides content and network security software and appliance solutions to consumers. Headquartered in California, Symantec has worldwide operations in 50 countries. Its Irish presence is located in Bl...

20. 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.