• Companies of the Republic of Ireland by industry‎ (10 C)

C

• Companies listed on Euronext Dublin‎ (1 C, 25 P)
• Cooperatives in the Republic of Ireland‎ (13 P)
• Companies based in Cork (city)‎ (1 C, 11 P)

D

• Defunct companies of the Republic of Ireland‎ (3 C, 3 P)
• Companies based in Dublin (city)‎ (8 C, 105 P)
• Companies based in Swords, Dublin‎ (7 P)

M

• Mannok‎ (2 P)
• Multinational companies headquartered in the Republic of Ireland‎ (17 P)

S

• State-sponsored bodies of the Republic of Ireland‎ (3 C, 30 P)

A

• Abrakebabra Investments
• Aer Rianta International
• Avoca Handweavers
• Avolon

C

• Celtrak
• Centra
• Chambers Ireland
• Chris Mee Safety Engineering
• Circle Oil
• Communications Clinic
• Abbey Machinery
• CR2 (company)

D

• List of Declan Ganley companies

E

• Experian

G

• GridBeyond

H

• HB Ice Cream
• Heneghan Peng Architects
• History of Volkswagen in Ireland
• House of Prayer, Achill

I

• Imera (company)
• Irish Aluminium Company

K

• Kenmare Resources
• Kindle Banking Systems

M

• Magners
• Mcor Technologies Ltd
• Mentec
• Mergon
• Musgrave Group

N

• National Digital Research Centre
• Newbridge Silverware

O

• Opsona Therapeutics

P

• Pearl & Dean Ireland
• Pharmapod
• Pilot Training College
• PowerCity

R

• R&H Hall

S

• SMBC Aviation Capital