WhichIndex

Largest companies in Ireland

We track 1 Ireland stock index (ISEQ 20), covering 21 companies.

Largest Ireland companies by market cap

Market caps from each exchange's listings, converted to US dollars at the same day's exchange rates, as of 2026-10-09.

The largest Ireland companies among those we track
#CompanyMarket capIndexes
1PDD Holdings$111.4 billion2
2Ryanair Holdings$27.4 billion2
3AIB Group$25.9 billion1
4Bank of Ireland$19.4 billion1
5Kingspan Group$18.2 billion1
6Kerry Group$17.6 billion1
7DCC Energy$7.3 billion1
8Glanbia$5.5 billion1
9Cairn Homes$1.9 billion1
10Permanent TSB$1.8 billion1
11Glenveagh Properties$1.4 billion1
12Irish Continental Group$1.3 billion1
13Uniphar$1.2 billion1
14Greencoat Renewables$944 million1
15FBD Holdings$772 million1
16Irish Residential Properties REIT$751 million1
17Origin Enterprises$498 million1
18Kenmare Resources$280 million1
19Mincon group$223 million1
20Malin Corp.$30 million1
21Donegal investment group$11 million1

Indexes

Companies in the most indexes

Ireland companies by number of index memberships
CompanyIndexesMember of
Ryanair Holdings2ISEQ 20, Nasdaq Composite
AIB Group1ISEQ 20
Bank of Ireland1ISEQ 20
Cairn Homes1ISEQ 20
Donegal investment group1ISEQ 20
FBD Holdings1ISEQ 20
Glanbia1ISEQ 20
Glenveagh Properties1ISEQ 20
Greencoat Renewables1ISEQ 20
Irish Continental Group1ISEQ 20
Irish Residential Properties REIT1ISEQ 20
Kenmare Resources1ISEQ 20
Kerry Group1ISEQ 20
Kingspan Group1ISEQ 20
Malin Corp.1ISEQ 20
Mincon group1ISEQ 20
Origin Enterprises1ISEQ 20
Permanent TSB1ISEQ 20
Uniphar1ISEQ 20
PDD Holdings2Nasdaq-100, Nasdaq Composite

Where Ireland sits on the map

Lit tiles are the Ireland indexes we track.

Americas

  1. S&P Merval 
  2. Ibovespa 
  3. S&P/TSX Composite 
  4. S&P IPSA 
  5. S&P/BMV IPC 
  6. S&P 500 
  7. Nasdaq-100 
  8. Dow Jones 
  9. Russell 2000 
  10. Nasdaq Composite 
  11. NYSE Composite 

Europe

  1. Euro Stoxx 50 
  2. ATX 
  3. BEL 20 
  4. OMX Copenhagen 20 
  5. OMX Tallinn 
  6. OMX Helsinki 25 
  7. CAC 40 
  8. DAX 
  9. OMX Iceland 15 
  10. ISEQ 2020 companies
  11. FTSE MIB 
  12. OMX Riga 
  13. OMX Vilnius 
  14. LuxX 
  15. AEX 
  16. AMX 
  17. AMS Next 20 
  18. OSEBX 
  19. WIG20 
  20. PSI 
  21. MOEX Russia 
  22. IBEX 35 
  23. IBEX Medium Cap 
  24. IBEX Small Cap 
  25. OMX Stockholm 30 
  26. SMI 
  27. BIST 100 
  28. FTSE 100 

Asia-Pacific

  1. S&P/ASX 200 
  2. Shanghai Composite 
  3. Hang Seng 
  4. Nifty 50 
  5. IDX Composite 
  6. Nikkei 225 
  7. S&P/NZX 50 
  8. KSE 100 
  9. Straits Times Index 
  10. KOSPI 
  11. VN-Index 

Middle East & Africa

  1. EGX 30 
  2. TA-35 
  3. ASE General 
  4. QE Index 
  5. TASI 
  6. JSE Top 40 
  7. ADX General 

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