1. 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...

2. 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 156 stores in the group, including five in Spain and Scotland and six in England.

3. 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...

4. 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 ...

5. Paddy Power Betfair

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.

6. Musgrave

Founded in Cork in the 1870s by Thomas and Stuart Musgrave, Musgrave is one of Ireland's oldest privately-owned companies. It is still controlled by members of the Musgrave family. The owner of the Supervalu, Centra and Daybreak franchise chains, it acquired Superquinn ...

7. Penneys

Penneys, which is operated by Primark, is a discount clothing retailer with 38 stores in Ireland. It is a subsidiary of Associated British Foods.

8. Lidl

Lidl is a discount supermarket chain founded in Germany. The company has 143 stores in the Republic of Ireland and 38 stores in Northern Ireland. Lidl currently employees over 4,400 people across the island of Ireland.

9. Aldi

Aldi is a German-owned discount supermarket chain and it opened its first supermarket in Ireland in 1999. The company does not disclose its sales or profits in Ireland. It has over 10,000 stores worldwide.

10. Henderson Group

Family-owned Henderson Group are the owners of the Spar, Eurospar, Vivo and Vivoxtra franchises in Northern Ireland and have been distributing food and grocery-related products to the convenience retail sector for over 100 years. The Henderson Group consists of four in...

11. 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...

12. Rehab

The Rehab Group, which in Ireland incorporates National Learning Network, RehabCare and Rehab Enterprises, is a not-for-profit organisation the mission of which is to "work towards a world where every person has the opportunity to achieve their potential". The peopl...

13. Bwg Group

BWG Group is an Irish retail and wholesale distribution company operating in the Republic of Ireland and the United Kingdom. The group includes several business divisions: BWG Foods – retail, wholesale and wines & spirits; BWG Property (Triode Newhill), Appleby Westward...

14. Sainsburys

Sainsbury’s was founded in 1869 and operates stores across the UK, including 12 supermarkets in Northern Ireland. Former manager of a Sainsbury’s store Nigel Macauley took over the role of Regional Operations Manager in 2011, after which employment remained steady and...

15. Smyths

Smyths Toys is a provider of children's entertainment products with 69 stores throughout the UK and Ireland: 41 in Britain, 22 in the Republic and six in Northern Ireland. The company sells everything from nursery products to preschool, toys for all ages as well as bike...

16. Marks and Spencer

Marks & Spencer has 17 stores in the Republic of Ireland and employs 2,800 staff. There are 26 Irish suppliers on the Island of Ireland including Lir Chocolates, Keeling's, Glenpatrick, Wexford Creamery, Finnebrogue and the Carlow Brewing Company. M&S Ireland was winn...

17. Circle K Ireland Energy Group Limited

Circle K Ireland is the largest fuel and convenience retailer in Ireland. Part of the global fuel and convenience store brand Circle K, it is owned and operated by the Canadian company Alimentation Couche-Tard. With 2,300 employees across the island of Ireland, its reta...

18. Mentor Graphics

Mentor Graphics (Holdings) Ltd is part of the US group Mentor Graphics Corporation (MGC). MGC specialises in the research, development and manufacture of software products and services, and the distribution of software products throughout the world. Its Irish base is...

19. Portwest

Founded in 1904, Irish company Portwest has become one of Europe’s most trusted names in workwear, personal protective equipment and safety footwear and leisurewear. In 2014, Taoiseach Enda Kenny launched a Portwest sales office and warehouse in Dubai. Portwest is now...

20. Bord na Mona

Bord Na Móna is an integrated utility service provider encompassing electricity, heating, resource recovery, water, growing media and related services. It is headquartered in Newbridge, Co Kildare and employs over 2,000 people.