1. 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...

2. 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.

3. 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...

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. 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...

6. 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...

7. 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...

8. 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...

9. 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.

10. Allergan Inc

In May 2020, Allergan was acquired by pharma giant Abbvie in a deal worth €58 billion. Allergan had previously been acquired by Actavis in 2015, but that business continued to be known as Allergan and was headquartered in Dublin. Allergan Pharmaceuticals Ireland, ...

11. Icon Plc

ICON is a global provider of outsourced development services to the pharmaceutical, biotechnology and medical device industries. It specialises in the strategic development, management and analysis of programs that support clinical development - from compound selection ...

12. 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.

13. Dunnes Stores Ireland

A combination of food, textiles and homewares all under one roof makes Dunnes Stores unique amongst Irish retail companies. In total there are 145 stores in the group, including five in Spain and eight in the UK.

14. 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...

15. Tesco

Tesco's reach in Ireland includes convenience stores, supermarkets and superstores across Ireland selling fresh food, groceries and household products, as well as clothing, books, hardware, electrical goods etc in larger stores. Services offered include Tesco Mobile, Te...

16. 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.

17. Grafton

The Grafton Group plc is a builders merchanting, DIY retailing and mortar manufacturing markets in Britain and Ireland. In Ireland it trades under the brands Woodie’s DIY , Heiton Buckley, Chadwicks and MacNaughton Blair. These businesses turnover €2 billion from 600 lo...

18. Applegreen

Motorway service station operator Petrogas is the company behind the Applegreen service stations. Applegreen is part of a consortium that holds a public-private partnership (PPP) contract with the National Roads Authority (NRA) to build and operate six motorway service ...

19. Perrigo

Headquartered in Ireland, Perrigo Company plc is a global healthcare supplier that develops, manufactures and distributes over-the-counter (OTC) and generic prescription (Rx) pharmaceuticals, infant formulas, nutritional products, animal health, dietary supplements, ac...

20. Greencore

Greencore Group is an international manufacturer of convenience foods. The convenience foods division provides a wide range of chilled, frozen and ambient foods to major retail, manufacturing and foodservice customers in the UK and Ireland, as well as many in Contin...